Go to main content

man pages section 3: Library Interfaces and Headers

Exit Print View

Updated: Thursday, June 13, 2019
 
 

libnet-functions.h (3)

Name

libnet-functions.h - libnet exported function prototypes

Synopsis

Functions
libnet_t * libnet_init (int injection_type, const char *device, char
*err_buf)
void libnet_destroy (libnet_t *l)
void libnet_clear_packet (libnet_t *l)
void libnet_stats (libnet_t *l, struct libnet_stats *ls)
int libnet_getfd (libnet_t *l)
const char * libnet_getdevice (libnet_t *l)
uint8_t * libnet_getpbuf (libnet_t *l, libnet_ptag_t ptag)
uint32_t libnet_getpbuf_size (libnet_t *l, libnet_ptag_t ptag)
char * libnet_geterror (libnet_t *l)
uint32_t libnet_getpacket_size (libnet_t *l)
int libnet_seed_prand (libnet_t *l)
uint32_t libnet_get_prand (int mod)
int libnet_toggle_checksum (libnet_t *l, libnet_ptag_t ptag, int mode)
char * libnet_addr2name4 (uint32_t in, uint8_t use_name)
uint32_t libnet_name2addr4 (libnet_t *l, char *host_name, uint8_t
use_name)
struct libnet_in6_addr libnet_name2addr6 (libnet_t *l, char *host_name,
uint8_t use_name)
void libnet_addr2name6_r (struct libnet_in6_addr addr, uint8_t
use_name, char *host_name, int host_name_len)
int libnet_plist_chain_new (libnet_t *l, libnet_plist_t **plist, char
*token_list)
int libnet_plist_chain_next_pair (libnet_plist_t *plist, uint16_t
*bport, uint16_t *eport)
int libnet_plist_chain_dump (libnet_plist_t *plist)
char * libnet_plist_chain_dump_string (libnet_plist_t *plist)
int libnet_plist_chain_free (libnet_plist_t *plist)
libnet_ptag_t libnet_build_802_1q (const uint8_t *dst, const uint8_t
*src, uint16_t tpi, uint8_t priority, uint8_t cfi, uint16_t
vlan_id, uint16_t len_proto, const uint8_t *payload, uint32_t
payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_802_1x (uint8_t eap_ver, uint8_t eap_type,
uint16_t length, const uint8_t *payload, uint32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_802_2 (uint8_t dsap, uint8_t ssap, uint8_t
control, const uint8_t *payload, uint32_t payload_s, libnet_t *l,
libnet_ptag_t ptag)
libnet_ptag_t libnet_build_802_2snap (uint8_t dsap, uint8_t ssap,
uint8_t control, uint8_t *oui, uint16_t type, const uint8_t
*payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_802_3 (const uint8_t *dst, const uint8_t
*src, uint16_t len, const uint8_t *payload, uint32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ethernet (const uint8_t *dst, const uint8_t
*src, uint16_t type, const uint8_t *payload, uint32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_autobuild_ethernet (const uint8_t *dst, uint16_t
type, libnet_t *l)
libnet_ptag_t libnet_build_fddi (uint8_t fc, const uint8_t *dst, const
uint8_t *src, uint8_t dsap, uint8_t ssap, uint8_t cf, const uint8_t
*oui, uint16_t type, const uint8_t *payload, uint32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_autobuild_fddi (uint8_t fc, const uint8_t *dst,
uint8_t dsap, uint8_t ssap, uint8_t cf, const uint8_t *oui,
uint16_t type, libnet_t *l)
libnet_ptag_t libnet_build_arp (uint16_t hrd, uint16_t pro, uint8_t
hln, uint8_t pln, uint16_t op, const uint8_t *sha, const uint8_t
*spa, const uint8_t *tha, const uint8_t *tpa, const uint8_t
*payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_autobuild_arp (uint16_t op, const uint8_t *sha,
const uint8_t *spa, const uint8_t *tha, uint8_t *tpa, libnet_t *l)
libnet_ptag_t libnet_build_tcp (uint16_t sp, uint16_t dp, uint32_t seq,
uint32_t ack, uint8_t control, uint16_t win, uint16_t sum, uint16_t
urg, uint16_t len, const uint8_t *payload, uint32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_tcp_options (const uint8_t *options,
uint32_t options_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_udp (uint16_t sp, uint16_t dp, uint16_t len,
uint16_t sum, const uint8_t *payload, uint32_t payload_s, libnet_t
*l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_cdp (uint8_t version, uint8_t ttl, uint16_t
sum, uint16_t type, uint16_t value_s, const uint8_t *value, const
uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t
ptag)
libnet_ptag_t libnet_build_icmpv4_echo (uint8_t type, uint8_t code,
uint16_t sum, uint16_t id, uint16_t seq, const uint8_t *payload,
uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_icmpv4_mask (uint8_t type, uint8_t code,
uint16_t sum, uint16_t id, uint16_t seq, uint32_t mask, const
uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t
ptag)
libnet_ptag_t libnet_build_icmpv4_unreach (uint8_t type, uint8_t code,
uint16_t sum, const uint8_t *payload, uint32_t payload_s, libnet_t
*l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_icmpv4_redirect (uint8_t type, uint8_t code,
uint16_t sum, uint32_t gateway, const uint8_t *payload, uint32_t
payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_icmpv4_timeexceed (uint8_t type, uint8_t
code, uint16_t sum, const uint8_t *payload, uint32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_icmpv4_timestamp (uint8_t type, uint8_t
code, uint16_t sum, uint16_t id, uint16_t seq, uint32_t otime,
uint32_t rtime, uint32_t ttime, const uint8_t *payload, uint32_t
payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_icmpv6_unreach (u_int8_t type, u_int8_t
code, u_int16_t sum, u_int8_t *payload, u_int32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_igmp (uint8_t type, uint8_t code, uint16_t
sum, uint32_t ip, const uint8_t *payload, uint32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ipv4 (uint16_t ip_len, uint8_t tos, uint16_t
id, uint16_t frag, uint8_t ttl, uint8_t prot, uint16_t sum,
uint32_t src, uint32_t dst, const uint8_t *payload, uint32_t
payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ipv4_options (const uint8_t *options,
uint32_t options_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_autobuild_ipv4 (uint16_t len, uint8_t prot,
uint32_t dst, libnet_t *l)
libnet_ptag_t libnet_build_ipv6 (uint8_t tc, uint32_t fl, uint16_t len,
uint8_t nh, uint8_t hl, struct libnet_in6_addr src, struct
libnet_in6_addr dst, const uint8_t *payload, uint32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ipv6_frag (uint8_t nh, uint8_t reserved,
uint16_t frag, uint32_t id, const uint8_t *payload, uint32_t
payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ipv6_routing (uint8_t nh, uint8_t len,
uint8_t rtype, uint8_t segments, const uint8_t *payload, uint32_t
payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ipv6_destopts (uint8_t nh, uint8_t len,
const uint8_t *payload, uint32_t payload_s, libnet_t *l,
libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ipv6_hbhopts (uint8_t nh, uint8_t len, const
uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t
ptag)
libnet_ptag_t libnet_autobuild_ipv6 (uint16_t len, uint8_t nh, struct
libnet_in6_addr dst, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_isl (uint8_t *dhost, uint8_t type, uint8_t
user, uint8_t *shost, uint16_t len, const uint8_t *snap, uint16_t
vid, uint16_t portindex, uint16_t reserved, const uint8_t *payload,
uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ipsec_esp_hdr (uint32_t spi, uint32_t seq,
uint32_t iv, const uint8_t *payload, uint32_t payload_s, libnet_t
*l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ipsec_esp_ftr (uint8_t len, uint8_t nh,
int8_t *auth, const uint8_t *payload, uint32_t payload_s, libnet_t
*l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ipsec_ah (uint8_t nh, uint8_t len, uint16_t
res, uint32_t spi, uint32_t seq, uint32_t auth, const uint8_t
*payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_dnsv4 (uint16_t h_len, uint16_t id, uint16_t
flags, uint16_t num_q, uint16_t num_anws_rr, uint16_t num_auth_rr,
uint16_t num_addi_rr, const uint8_t *payload, uint32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_rip (uint8_t cmd, uint8_t version, uint16_t
rd, uint16_t af, uint16_t rt, uint32_t addr, uint32_t mask,
uint32_t next_hop, uint32_t metric, const uint8_t *payload,
uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_rpc_call (uint32_t rm, uint32_t xid,
uint32_t prog_num, uint32_t prog_vers, uint32_t procedure, uint32_t
cflavor, uint32_t clength, uint8_t *cdata, uint32_t vflavor,
uint32_t vlength, const uint8_t *vdata, const uint8_t *payload,
uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_stp_conf (uint16_t id, uint8_t version,
uint8_t bpdu_type, uint8_t flags, const uint8_t *root_id, uint32_t
root_pc, const uint8_t *bridge_id, uint16_t port_id, uint16_t
message_age, uint16_t max_age, uint16_t hello_time, uint16_t
f_delay, const uint8_t *payload, uint32_t payload_s, libnet_t *l,
libnet_ptag_t ptag)
libnet_ptag_t libnet_build_stp_tcn (uint16_t id, uint8_t version,
uint8_t bpdu_type, const uint8_t *payload, uint32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_token_ring (uint8_t ac, uint8_t fc, const
uint8_t *dst, const uint8_t *src, uint8_t dsap, uint8_t ssap,
uint8_t cf, const uint8_t *oui, uint16_t type, const uint8_t
*payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_autobuild_token_ring (uint8_t ac, uint8_t fc,
const uint8_t *dst, uint8_t dsap, uint8_t ssap, uint8_t cf, const
uint8_t *oui, uint16_t type, libnet_t *l)
libnet_ptag_t libnet_build_vrrp (uint8_t version, uint8_t type, uint8_t
vrouter_id, uint8_t priority, uint8_t ip_count, uint8_t auth_type,
uint8_t advert_int, uint16_t sum, const uint8_t *payload, uint32_t
payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_mpls (uint32_t label, uint8_t experimental,
uint8_t bos, uint8_t ttl, const uint8_t *payload, uint32_t
payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ntp (uint8_t leap_indicator, uint8_t
version, uint8_t mode, uint8_t stratum, uint8_t poll, uint8_t
precision, uint16_t delay_int, uint16_t delay_frac, uint16_t
dispersion_int, uint16_t dispersion_frac, uint32_t reference_id,
uint32_t ref_ts_int, uint32_t ref_ts_frac, uint32_t orig_ts_int,
uint32_t orig_ts_frac, uint32_t rec_ts_int, uint32_t rec_ts_frac,
uint32_t xmt_ts_int, uint32_t xmt_ts_frac, const uint8_t *payload,
uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ospfv2 (uint16_t len, uint8_t type, uint32_t
rtr_id, uint32_t area_id, uint16_t sum, uint16_t autype, const
uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t
ptag)
libnet_ptag_t libnet_build_ospfv2_hello (uint32_t netmask, uint16_t
interval, uint8_t opts, uint8_t priority, uint dead_int, uint32_t
des_rtr, uint32_t bkup_rtr, const uint8_t *payload, uint32_t
payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ospfv2_dbd (uint16_t dgram_len, uint8_t
opts, uint8_t type, uint seqnum, const uint8_t *payload, uint32_t
payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ospfv2_lsr (uint type, uint lsid, uint32_t
advrtr, const uint8_t *payload, uint32_t payload_s, libnet_t *l,
libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ospfv2_lsu (uint num, const uint8_t
*payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ospfv2_lsa (uint16_t age, uint8_t opts,
uint8_t type, uint lsid, uint32_t advrtr, uint seqnum, uint16_t
sum, uint16_t len, const uint8_t *payload, uint32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ospfv2_lsa_rtr (uint16_t flags, uint16_t
num, uint id, uint data, uint8_t type, uint8_t tos, uint16_t
metric, const uint8_t *payload, uint32_t payload_s, libnet_t *l,
libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ospfv2_lsa_net (uint32_t nmask, uint rtrid,
const uint8_t *payload, uint32_t payload_s, libnet_t *l,
libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ospfv2_lsa_sum (uint32_t nmask, uint metric,
uint tos, const uint8_t *payload, uint32_t payload_s, libnet_t *l,
libnet_ptag_t ptag)
libnet_ptag_t libnet_build_ospfv2_lsa_as (uint32_t nmask, uint metric,
uint32_t fwdaddr, uint tag, const uint8_t *payload, uint32_t
payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_data (const uint8_t *payload, uint32_t
payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_dhcpv4 (uint8_t opcode, uint8_t htype,
uint8_t hlen, uint8_t hopcount, uint32_t xid, uint16_t secs,
uint16_t flags, uint32_t cip, uint32_t yip, uint32_t sip, uint32_t
gip, const uint8_t *chaddr, uint8_t *sname, const uint8_t *file,
const uint8_t *payload, uint32_t payload_s, libnet_t *l,
libnet_ptag_t ptag)
libnet_ptag_t libnet_build_bootpv4 (uint8_t opcode, uint8_t htype,
uint8_t hlen, uint8_t hopcount, uint32_t xid, uint16_t secs,
uint16_t flags, uint32_t cip, uint32_t yip, uint32_t sip, uint32_t
gip, const uint8_t *chaddr, uint8_t *sname, const uint8_t *file,
const uint8_t *payload, uint32_t payload_s, libnet_t *l,
libnet_ptag_t ptag)
uint32_t libnet_getgre_length (uint16_t fv)
libnet_ptag_t libnet_build_gre (uint16_t fv, uint16_t type, uint16_t
sum, uint16_t offset, uint32_t key, uint32_t seq, uint16_t len,
const uint8_t *payload, uint32_t payload_s, libnet_t *l,
libnet_ptag_t ptag)
libnet_ptag_t libnet_build_egre (uint16_t fv, uint16_t type, uint16_t
sum, uint16_t offset, uint32_t key, uint32_t seq, uint16_t len,
const uint8_t *payload, uint32_t payload_s, libnet_t *l,
libnet_ptag_t ptag)
libnet_ptag_t libnet_build_gre_sre (uint16_t af, uint8_t offset,
uint8_t length, uint8_t *routing, const uint8_t *payload, uint32_t
payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_gre_last_sre (libnet_t *l, libnet_ptag_t
ptag)
libnet_ptag_t libnet_build_bgp4_header (uint8_t
marker[LIBNET_BGP4_MARKER_SIZE], uint16_t len, uint8_t type, const
uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t
ptag)
libnet_ptag_t libnet_build_bgp4_open (uint8_t version, uint16_t src_as,
uint16_t hold_time, uint32_t bgp_id, uint8_t opt_len, const uint8_t
*payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_bgp4_update (uint16_t unfeasible_rt_len,
const uint8_t *withdrawn_rt, uint16_t total_path_attr_len, const
uint8_t *path_attributes, uint16_t info_len, uint8_t
*reachability_info, const uint8_t *payload, uint32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_bgp4_notification (uint8_t err_code, uint8_t
err_subcode, const uint8_t *payload, uint32_t payload_s, libnet_t
*l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_sebek (uint32_t magic, uint16_t version,
uint16_t type, uint32_t counter, uint32_t time_sec, uint32_t
time_usec, uint32_t pid, uint32_t uid, uint32_t fd, uint8_t
cmd[SEBEK_CMD_LENGTH], uint32_t length, const uint8_t *payload,
uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_hsrp (uint8_t version, uint8_t opcode,
uint8_t state, uint8_t hello_time, uint8_t hold_time, uint8_t
priority, uint8_t group, uint8_t reserved, uint8_t
authdata[HSRP_AUTHDATA_LENGTH], uint32_t virtual_ip, const uint8_t
*payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_build_link (const uint8_t *dst, const uint8_t
*src, const uint8_t *oui, uint16_t type, const uint8_t *payload,
uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
libnet_ptag_t libnet_autobuild_link (const uint8_t *dst, const uint8_t
*oui, uint16_t type, libnet_t *l)
int libnet_write (libnet_t *l)
uint32_t libnet_get_ipaddr4 (libnet_t *l)
struct libnet_in6_addr libnet_get_ipaddr6 (libnet_t *l)
struct libnet_ether_addr * libnet_get_hwaddr (libnet_t *l)
uint8_t * libnet_hex_aton (const char *s, int *len)
const char * libnet_version (void)
int libnet_adv_cull_packet (libnet_t *l, uint8_t **packet, uint32_t
*packet_s)
int libnet_adv_cull_header (libnet_t *l, libnet_ptag_t ptag, uint8_t
**header, uint32_t *header_s)
int libnet_adv_write_link (libnet_t *l, const uint8_t *packet, uint32_t
packet_s)
int libnet_adv_write_raw_ipv4 (libnet_t *l, const uint8_t *packet,
uint32_t packet_s)
void libnet_adv_free_packet (libnet_t *l, uint8_t *packet)
int libnet_cq_add (libnet_t *l, char *label)
libnet_t * libnet_cq_remove (libnet_t *l)
libnet_t * libnet_cq_remove_by_label (char *label)
const char * libnet_cq_getlabel (libnet_t *l)
libnet_t * libnet_cq_find_by_label (char *label)
void libnet_cq_destroy (void)
libnet_t * libnet_cq_head (void)
int libnet_cq_last (void)
libnet_t * libnet_cq_next (void)
uint32_t libnet_cq_size (void)
uint32_t libnet_cq_end_loop (void)
void libnet_diag_dump_context (libnet_t *l)
void libnet_diag_dump_pblock (libnet_t *l)
char * libnet_diag_dump_pblock_type (uint8_t type)
void libnet_diag_dump_hex (const uint8_t *packet, uint32_t len, int
swap, FILE *stream)
int libnet_write_raw_ipv4 (libnet_t *l, const uint8_t *packet, uint32_t
size)
int libnet_write_raw_ipv6 (libnet_t *l, const uint8_t *packet, uint32_t
size)
int libnet_write_link (libnet_t *l, const uint8_t *packet, uint32_t
size)
int libnet_open_raw4 (libnet_t *l)
int libnet_close_raw4 (libnet_t *l)
int libnet_open_raw6 (libnet_t *l)
int libnet_close_raw6 (libnet_t *l)
int libnet_select_device (libnet_t *l)
int libnet_open_link (libnet_t *l)
int libnet_close_link (libnet_t *l)
int libnet_do_checksum (libnet_t *l, uint8_t *iphdr, int protocol, int
h_len)
int libnet_inet_checksum (libnet_t *l, uint8_t *iphdr, int protocol,
int h_len, const uint8_t *beg, const uint8_t *end)
uint32_t libnet_compute_crc (uint8_t *buf, uint32_t len)
uint16_t libnet_ip_check (uint16_t *addr, int len)
int libnet_in_cksum (uint16_t *addr, int len)
libnet_pblock_t * libnet_pblock_probe (libnet_t *l, libnet_ptag_t ptag,
uint32_t b_len, uint8_t type)
libnet_pblock_t * libnet_pblock_new (libnet_t *l, uint32_t b_len)
int libnet_pblock_swap (libnet_t *l, libnet_ptag_t ptag1, libnet_ptag_t
ptag2)
int libnet_pblock_insert_before (libnet_t *l, libnet_ptag_t ptag1,
libnet_ptag_t ptag2)
void libnet_pblock_delete (libnet_t *l, libnet_pblock_t *p)
libnet_ptag_t libnet_pblock_update (libnet_t *l, libnet_pblock_t *p,
uint32_t h, uint8_t type)
libnet_pblock_t * libnet_pblock_find (libnet_t *l, libnet_ptag_t ptag)
int libnet_pblock_append (libnet_t *l, libnet_pblock_t *p, const
uint8_t *buf, uint32_t len)
void libnet_pblock_setflags (libnet_pblock_t *p, uint8_t flags)
int libnet_pblock_p2p (uint8_t type)
int libnet_pblock_coalesce (libnet_t *l, uint8_t **packet, uint32_t
*size)
int libnet_check_iface (libnet_t *l)

Variables
struct libnet_in6_addr in6addr_error

Description

libnet-functions.h(3)               libnet               libnet-functions.h(3)



NAME
       libnet-functions.h - libnet exported function prototypes

SYNOPSIS
   Functions
       libnet_t * libnet_init (int injection_type, const char *device, char
           *err_buf)
       void libnet_destroy (libnet_t *l)
       void libnet_clear_packet (libnet_t *l)
       void libnet_stats (libnet_t *l, struct libnet_stats *ls)
       int libnet_getfd (libnet_t *l)
       const char * libnet_getdevice (libnet_t *l)
       uint8_t * libnet_getpbuf (libnet_t *l, libnet_ptag_t ptag)
       uint32_t libnet_getpbuf_size (libnet_t *l, libnet_ptag_t ptag)
       char * libnet_geterror (libnet_t *l)
       uint32_t libnet_getpacket_size (libnet_t *l)
       int libnet_seed_prand (libnet_t *l)
       uint32_t libnet_get_prand (int mod)
       int libnet_toggle_checksum (libnet_t *l, libnet_ptag_t ptag, int mode)
       char * libnet_addr2name4 (uint32_t in, uint8_t use_name)
       uint32_t libnet_name2addr4 (libnet_t *l, char *host_name, uint8_t
           use_name)
       struct libnet_in6_addr libnet_name2addr6 (libnet_t *l, char *host_name,
           uint8_t use_name)
       void libnet_addr2name6_r (struct libnet_in6_addr addr, uint8_t
           use_name, char *host_name, int host_name_len)
       int libnet_plist_chain_new (libnet_t *l, libnet_plist_t **plist, char
           *token_list)
       int libnet_plist_chain_next_pair (libnet_plist_t *plist, uint16_t
           *bport, uint16_t *eport)
       int libnet_plist_chain_dump (libnet_plist_t *plist)
       char * libnet_plist_chain_dump_string (libnet_plist_t *plist)
       int libnet_plist_chain_free (libnet_plist_t *plist)
       libnet_ptag_t libnet_build_802_1q (const uint8_t *dst, const uint8_t
           *src, uint16_t tpi, uint8_t priority, uint8_t cfi, uint16_t
           vlan_id, uint16_t len_proto, const uint8_t *payload, uint32_t
           payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_802_1x (uint8_t eap_ver, uint8_t eap_type,
           uint16_t length, const uint8_t *payload, uint32_t payload_s,
           libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_802_2 (uint8_t dsap, uint8_t ssap, uint8_t
           control, const uint8_t *payload, uint32_t payload_s, libnet_t *l,
           libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_802_2snap (uint8_t dsap, uint8_t ssap,
           uint8_t control, uint8_t *oui, uint16_t type, const uint8_t
           *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_802_3 (const uint8_t *dst, const uint8_t
           *src, uint16_t len, const uint8_t *payload, uint32_t payload_s,
           libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ethernet (const uint8_t *dst, const uint8_t
           *src, uint16_t type, const uint8_t *payload, uint32_t payload_s,
           libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_autobuild_ethernet (const uint8_t *dst, uint16_t
           type, libnet_t *l)
       libnet_ptag_t libnet_build_fddi (uint8_t fc, const uint8_t *dst, const
           uint8_t *src, uint8_t dsap, uint8_t ssap, uint8_t cf, const uint8_t
           *oui, uint16_t type, const uint8_t *payload, uint32_t payload_s,
           libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_autobuild_fddi (uint8_t fc, const uint8_t *dst,
           uint8_t dsap, uint8_t ssap, uint8_t cf, const uint8_t *oui,
           uint16_t type, libnet_t *l)
       libnet_ptag_t libnet_build_arp (uint16_t hrd, uint16_t pro, uint8_t
           hln, uint8_t pln, uint16_t op, const uint8_t *sha, const uint8_t
           *spa, const uint8_t *tha, const uint8_t *tpa, const uint8_t
           *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_autobuild_arp (uint16_t op, const uint8_t *sha,
           const uint8_t *spa, const uint8_t *tha, uint8_t *tpa, libnet_t *l)
       libnet_ptag_t libnet_build_tcp (uint16_t sp, uint16_t dp, uint32_t seq,
           uint32_t ack, uint8_t control, uint16_t win, uint16_t sum, uint16_t
           urg, uint16_t len, const uint8_t *payload, uint32_t payload_s,
           libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_tcp_options (const uint8_t *options,
           uint32_t options_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_udp (uint16_t sp, uint16_t dp, uint16_t len,
           uint16_t sum, const uint8_t *payload, uint32_t payload_s, libnet_t
           *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_cdp (uint8_t version, uint8_t ttl, uint16_t
           sum, uint16_t type, uint16_t value_s, const uint8_t *value, const
           uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t
           ptag)
       libnet_ptag_t libnet_build_icmpv4_echo (uint8_t type, uint8_t code,
           uint16_t sum, uint16_t id, uint16_t seq, const uint8_t *payload,
           uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_icmpv4_mask (uint8_t type, uint8_t code,
           uint16_t sum, uint16_t id, uint16_t seq, uint32_t mask, const
           uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t
           ptag)
       libnet_ptag_t libnet_build_icmpv4_unreach (uint8_t type, uint8_t code,
           uint16_t sum, const uint8_t *payload, uint32_t payload_s, libnet_t
           *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_icmpv4_redirect (uint8_t type, uint8_t code,
           uint16_t sum, uint32_t gateway, const uint8_t *payload, uint32_t
           payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_icmpv4_timeexceed (uint8_t type, uint8_t
           code, uint16_t sum, const uint8_t *payload, uint32_t payload_s,
           libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_icmpv4_timestamp (uint8_t type, uint8_t
           code, uint16_t sum, uint16_t id, uint16_t seq, uint32_t otime,
           uint32_t rtime, uint32_t ttime, const uint8_t *payload, uint32_t
           payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_icmpv6_unreach (u_int8_t type, u_int8_t
           code, u_int16_t sum, u_int8_t *payload, u_int32_t payload_s,
           libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_igmp (uint8_t type, uint8_t code, uint16_t
           sum, uint32_t ip, const uint8_t *payload, uint32_t payload_s,
           libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ipv4 (uint16_t ip_len, uint8_t tos, uint16_t
           id, uint16_t frag, uint8_t ttl, uint8_t prot, uint16_t sum,
           uint32_t src, uint32_t dst, const uint8_t *payload, uint32_t
           payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ipv4_options (const uint8_t *options,
           uint32_t options_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_autobuild_ipv4 (uint16_t len, uint8_t prot,
           uint32_t dst, libnet_t *l)
       libnet_ptag_t libnet_build_ipv6 (uint8_t tc, uint32_t fl, uint16_t len,
           uint8_t nh, uint8_t hl, struct libnet_in6_addr src, struct
           libnet_in6_addr dst, const uint8_t *payload, uint32_t payload_s,
           libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ipv6_frag (uint8_t nh, uint8_t reserved,
           uint16_t frag, uint32_t id, const uint8_t *payload, uint32_t
           payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ipv6_routing (uint8_t nh, uint8_t len,
           uint8_t rtype, uint8_t segments, const uint8_t *payload, uint32_t
           payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ipv6_destopts (uint8_t nh, uint8_t len,
           const uint8_t *payload, uint32_t payload_s, libnet_t *l,
           libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ipv6_hbhopts (uint8_t nh, uint8_t len, const
           uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t
           ptag)
       libnet_ptag_t libnet_autobuild_ipv6 (uint16_t len, uint8_t nh, struct
           libnet_in6_addr dst, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_isl (uint8_t *dhost, uint8_t type, uint8_t
           user, uint8_t *shost, uint16_t len, const uint8_t *snap, uint16_t
           vid, uint16_t portindex, uint16_t reserved, const uint8_t *payload,
           uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ipsec_esp_hdr (uint32_t spi, uint32_t seq,
           uint32_t iv, const uint8_t *payload, uint32_t payload_s, libnet_t
           *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ipsec_esp_ftr (uint8_t len, uint8_t nh,
           int8_t *auth, const uint8_t *payload, uint32_t payload_s, libnet_t
           *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ipsec_ah (uint8_t nh, uint8_t len, uint16_t
           res, uint32_t spi, uint32_t seq, uint32_t auth, const uint8_t
           *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_dnsv4 (uint16_t h_len, uint16_t id, uint16_t
           flags, uint16_t num_q, uint16_t num_anws_rr, uint16_t num_auth_rr,
           uint16_t num_addi_rr, const uint8_t *payload, uint32_t payload_s,
           libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_rip (uint8_t cmd, uint8_t version, uint16_t
           rd, uint16_t af, uint16_t rt, uint32_t addr, uint32_t mask,
           uint32_t next_hop, uint32_t metric, const uint8_t *payload,
           uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_rpc_call (uint32_t rm, uint32_t xid,
           uint32_t prog_num, uint32_t prog_vers, uint32_t procedure, uint32_t
           cflavor, uint32_t clength, uint8_t *cdata, uint32_t vflavor,
           uint32_t vlength, const uint8_t *vdata, const uint8_t *payload,
           uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_stp_conf (uint16_t id, uint8_t version,
           uint8_t bpdu_type, uint8_t flags, const uint8_t *root_id, uint32_t
           root_pc, const uint8_t *bridge_id, uint16_t port_id, uint16_t
           message_age, uint16_t max_age, uint16_t hello_time, uint16_t
           f_delay, const uint8_t *payload, uint32_t payload_s, libnet_t *l,
           libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_stp_tcn (uint16_t id, uint8_t version,
           uint8_t bpdu_type, const uint8_t *payload, uint32_t payload_s,
           libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_token_ring (uint8_t ac, uint8_t fc, const
           uint8_t *dst, const uint8_t *src, uint8_t dsap, uint8_t ssap,
           uint8_t cf, const uint8_t *oui, uint16_t type, const uint8_t
           *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_autobuild_token_ring (uint8_t ac, uint8_t fc,
           const uint8_t *dst, uint8_t dsap, uint8_t ssap, uint8_t cf, const
           uint8_t *oui, uint16_t type, libnet_t *l)
       libnet_ptag_t libnet_build_vrrp (uint8_t version, uint8_t type, uint8_t
           vrouter_id, uint8_t priority, uint8_t ip_count, uint8_t auth_type,
           uint8_t advert_int, uint16_t sum, const uint8_t *payload, uint32_t
           payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_mpls (uint32_t label, uint8_t experimental,
           uint8_t bos, uint8_t ttl, const uint8_t *payload, uint32_t
           payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ntp (uint8_t leap_indicator, uint8_t
           version, uint8_t mode, uint8_t stratum, uint8_t poll, uint8_t
           precision, uint16_t delay_int, uint16_t delay_frac, uint16_t
           dispersion_int, uint16_t dispersion_frac, uint32_t reference_id,
           uint32_t ref_ts_int, uint32_t ref_ts_frac, uint32_t orig_ts_int,
           uint32_t orig_ts_frac, uint32_t rec_ts_int, uint32_t rec_ts_frac,
           uint32_t xmt_ts_int, uint32_t xmt_ts_frac, const uint8_t *payload,
           uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ospfv2 (uint16_t len, uint8_t type, uint32_t
           rtr_id, uint32_t area_id, uint16_t sum, uint16_t autype, const
           uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t
           ptag)
       libnet_ptag_t libnet_build_ospfv2_hello (uint32_t netmask, uint16_t
           interval, uint8_t opts, uint8_t priority, uint dead_int, uint32_t
           des_rtr, uint32_t bkup_rtr, const uint8_t *payload, uint32_t
           payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ospfv2_dbd (uint16_t dgram_len, uint8_t
           opts, uint8_t type, uint seqnum, const uint8_t *payload, uint32_t
           payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ospfv2_lsr (uint type, uint lsid, uint32_t
           advrtr, const uint8_t *payload, uint32_t payload_s, libnet_t *l,
           libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ospfv2_lsu (uint num, const uint8_t
           *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ospfv2_lsa (uint16_t age, uint8_t opts,
           uint8_t type, uint lsid, uint32_t advrtr, uint seqnum, uint16_t
           sum, uint16_t len, const uint8_t *payload, uint32_t payload_s,
           libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ospfv2_lsa_rtr (uint16_t flags, uint16_t
           num, uint id, uint data, uint8_t type, uint8_t tos, uint16_t
           metric, const uint8_t *payload, uint32_t payload_s, libnet_t *l,
           libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ospfv2_lsa_net (uint32_t nmask, uint rtrid,
           const uint8_t *payload, uint32_t payload_s, libnet_t *l,
           libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ospfv2_lsa_sum (uint32_t nmask, uint metric,
           uint tos, const uint8_t *payload, uint32_t payload_s, libnet_t *l,
           libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_ospfv2_lsa_as (uint32_t nmask, uint metric,
           uint32_t fwdaddr, uint tag, const uint8_t *payload, uint32_t
           payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_data (const uint8_t *payload, uint32_t
           payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_dhcpv4 (uint8_t opcode, uint8_t htype,
           uint8_t hlen, uint8_t hopcount, uint32_t xid, uint16_t secs,
           uint16_t flags, uint32_t cip, uint32_t yip, uint32_t sip, uint32_t
           gip, const uint8_t *chaddr, uint8_t *sname, const uint8_t *file,
           const uint8_t *payload, uint32_t payload_s, libnet_t *l,
           libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_bootpv4 (uint8_t opcode, uint8_t htype,
           uint8_t hlen, uint8_t hopcount, uint32_t xid, uint16_t secs,
           uint16_t flags, uint32_t cip, uint32_t yip, uint32_t sip, uint32_t
           gip, const uint8_t *chaddr, uint8_t *sname, const uint8_t *file,
           const uint8_t *payload, uint32_t payload_s, libnet_t *l,
           libnet_ptag_t ptag)
       uint32_t libnet_getgre_length (uint16_t fv)
       libnet_ptag_t libnet_build_gre (uint16_t fv, uint16_t type, uint16_t
           sum, uint16_t offset, uint32_t key, uint32_t seq, uint16_t len,
           const uint8_t *payload, uint32_t payload_s, libnet_t *l,
           libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_egre (uint16_t fv, uint16_t type, uint16_t
           sum, uint16_t offset, uint32_t key, uint32_t seq, uint16_t len,
           const uint8_t *payload, uint32_t payload_s, libnet_t *l,
           libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_gre_sre (uint16_t af, uint8_t offset,
           uint8_t length, uint8_t *routing, const uint8_t *payload, uint32_t
           payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_gre_last_sre (libnet_t *l, libnet_ptag_t
           ptag)
       libnet_ptag_t libnet_build_bgp4_header (uint8_t
           marker[LIBNET_BGP4_MARKER_SIZE], uint16_t len, uint8_t type, const
           uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t
           ptag)
       libnet_ptag_t libnet_build_bgp4_open (uint8_t version, uint16_t src_as,
           uint16_t hold_time, uint32_t bgp_id, uint8_t opt_len, const uint8_t
           *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_bgp4_update (uint16_t unfeasible_rt_len,
           const uint8_t *withdrawn_rt, uint16_t total_path_attr_len, const
           uint8_t *path_attributes, uint16_t info_len, uint8_t
           *reachability_info, const uint8_t *payload, uint32_t payload_s,
           libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_bgp4_notification (uint8_t err_code, uint8_t
           err_subcode, const uint8_t *payload, uint32_t payload_s, libnet_t
           *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_sebek (uint32_t magic, uint16_t version,
           uint16_t type, uint32_t counter, uint32_t time_sec, uint32_t
           time_usec, uint32_t pid, uint32_t uid, uint32_t fd, uint8_t
           cmd[SEBEK_CMD_LENGTH], uint32_t length, const uint8_t *payload,
           uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_hsrp (uint8_t version, uint8_t opcode,
           uint8_t state, uint8_t hello_time, uint8_t hold_time, uint8_t
           priority, uint8_t group, uint8_t reserved, uint8_t
           authdata[HSRP_AUTHDATA_LENGTH], uint32_t virtual_ip, const uint8_t
           *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_build_link (const uint8_t *dst, const uint8_t
           *src, const uint8_t *oui, uint16_t type, const uint8_t *payload,
           uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
       libnet_ptag_t libnet_autobuild_link (const uint8_t *dst, const uint8_t
           *oui, uint16_t type, libnet_t *l)
       int libnet_write (libnet_t *l)
       uint32_t libnet_get_ipaddr4 (libnet_t *l)
       struct libnet_in6_addr libnet_get_ipaddr6 (libnet_t *l)
       struct libnet_ether_addr * libnet_get_hwaddr (libnet_t *l)
       uint8_t * libnet_hex_aton (const char *s, int *len)
       const char * libnet_version (void)
       int libnet_adv_cull_packet (libnet_t *l, uint8_t **packet, uint32_t
           *packet_s)
       int libnet_adv_cull_header (libnet_t *l, libnet_ptag_t ptag, uint8_t
           **header, uint32_t *header_s)
       int libnet_adv_write_link (libnet_t *l, const uint8_t *packet, uint32_t
           packet_s)
       int libnet_adv_write_raw_ipv4 (libnet_t *l, const uint8_t *packet,
           uint32_t packet_s)
       void libnet_adv_free_packet (libnet_t *l, uint8_t *packet)
       int libnet_cq_add (libnet_t *l, char *label)
       libnet_t * libnet_cq_remove (libnet_t *l)
       libnet_t * libnet_cq_remove_by_label (char *label)
       const char * libnet_cq_getlabel (libnet_t *l)
       libnet_t * libnet_cq_find_by_label (char *label)
       void libnet_cq_destroy (void)
       libnet_t * libnet_cq_head (void)
       int libnet_cq_last (void)
       libnet_t * libnet_cq_next (void)
       uint32_t libnet_cq_size (void)
       uint32_t libnet_cq_end_loop (void)
       void libnet_diag_dump_context (libnet_t *l)
       void libnet_diag_dump_pblock (libnet_t *l)
       char * libnet_diag_dump_pblock_type (uint8_t type)
       void libnet_diag_dump_hex (const uint8_t *packet, uint32_t len, int
           swap, FILE *stream)
       int libnet_write_raw_ipv4 (libnet_t *l, const uint8_t *packet, uint32_t
           size)
       int libnet_write_raw_ipv6 (libnet_t *l, const uint8_t *packet, uint32_t
           size)
       int libnet_write_link (libnet_t *l, const uint8_t *packet, uint32_t
           size)
       int libnet_open_raw4 (libnet_t *l)
       int libnet_close_raw4 (libnet_t *l)
       int libnet_open_raw6 (libnet_t *l)
       int libnet_close_raw6 (libnet_t *l)
       int libnet_select_device (libnet_t *l)
       int libnet_open_link (libnet_t *l)
       int libnet_close_link (libnet_t *l)
       int libnet_do_checksum (libnet_t *l, uint8_t *iphdr, int protocol, int
           h_len)
       int libnet_inet_checksum (libnet_t *l, uint8_t *iphdr, int protocol,
           int h_len, const uint8_t *beg, const uint8_t *end)
       uint32_t libnet_compute_crc (uint8_t *buf, uint32_t len)
       uint16_t libnet_ip_check (uint16_t *addr, int len)
       int libnet_in_cksum (uint16_t *addr, int len)
       libnet_pblock_t * libnet_pblock_probe (libnet_t *l, libnet_ptag_t ptag,
           uint32_t b_len, uint8_t type)
       libnet_pblock_t * libnet_pblock_new (libnet_t *l, uint32_t b_len)
       int libnet_pblock_swap (libnet_t *l, libnet_ptag_t ptag1, libnet_ptag_t
           ptag2)
       int libnet_pblock_insert_before (libnet_t *l, libnet_ptag_t ptag1,
           libnet_ptag_t ptag2)
       void libnet_pblock_delete (libnet_t *l, libnet_pblock_t *p)
       libnet_ptag_t libnet_pblock_update (libnet_t *l, libnet_pblock_t *p,
           uint32_t h, uint8_t type)
       libnet_pblock_t * libnet_pblock_find (libnet_t *l, libnet_ptag_t ptag)
       int libnet_pblock_append (libnet_t *l, libnet_pblock_t *p, const
           uint8_t *buf, uint32_t len)
       void libnet_pblock_setflags (libnet_pblock_t *p, uint8_t flags)
       int libnet_pblock_p2p (uint8_t type)
       int libnet_pblock_coalesce (libnet_t *l, uint8_t **packet, uint32_t
           *size)
       int libnet_check_iface (libnet_t *l)

   Variables
       struct libnet_in6_addr in6addr_error

Detailed Description
       libnet exported function prototypes



Function Documentation
   char* libnet_addr2name4 (uint32_t in, uint8_t use_name)
       Takes a network byte ordered IPv4 address and returns a pointer to
       either a canonical DNS name (if it has one) or a string of dotted
       decimals. This may incur a DNS lookup if the hostname and mode is set
       to LIBNET_RESOLVE. If mode is set to LIBNET_DONT_RESOLVE, no DNS lookup
       will be performed and the function will return a pointer to a dotted
       decimal string. The function cannot fail -- if no canonical name
       exists, it will fall back on returning a dotted decimal string. This
       function is non-reentrant.

       Parameters:
           in network byte ordered IPv4 address
           use_name LIBNET_RESOLVE or LIBNET_DONT_RESOLVE

       Returns:
           a pointer to presentation format string

   void libnet_addr2name6_r (struct libnet_in6_addr addr, uint8_t use_name,
       char * host_name, int host_name_len)
       Should document this baby right here.

   int libnet_adv_cull_header (libnet_t * l, libnet_ptag_t ptag, uint8_t **
       header, uint32_t * header_s)
       [Advanced Interface] Pulls the header from the specified ptag from the
       given libnet context. This function is part of the advanced interface
       and is only available when libnet is initialized in advanced mode. If
       the function fails libnet_geterror() can tell you why.

       Parameters:
           l pointer to a libnet context
           ptag the ptag referencing the header to pull
           header will contain the header
           header_s will contain the header size

       Returns:
           1 on success, -1 on failure

   int libnet_adv_cull_packet (libnet_t * l, uint8_t ** packet, uint32_t *
       packet_s)
       [Advanced Interface] Yanks a prebuilt, wire-ready packet from the given
       libnet context. If libnet was configured to do so (which it is by
       default) the packet will have all checksums written in. This function
       is part of the advanced interface and is only available when libnet is
       initialized in advanced mode. It is important to note that the function
       performs an implicit malloc() and a corresponding call to
       libnet_adv_free_packet() should be made to free the memory packet
       occupies. If the function fails libnet_geterror() can tell you why.

       Parameters:
           l pointer to a libnet context
           packet will contain the wire-ready packet
           packet_s will contain the packet size

       Returns:
           1 on success, -1 on failure

   void libnet_adv_free_packet (libnet_t * l, uint8_t * packet)
       [Advanced Interface] Frees the memory allocated when
       libnet_adv_cull_packet() is called.

       Parameters:
           l pointer to a libnet context
           packet a pointer to the packet to free

   int libnet_adv_write_link (libnet_t * l, const uint8_t * packet, uint32_t
       packet_s)
       [Advanced Interface] Writes a packet the network at the link layer.
       This function is useful to write a packet that has been constructed by
       hand by the application programmer or, more commonly, to write a packet
       that has been returned by a call to libnet_adv_cull_packet(). This
       function is part of the advanced interface and is only available when
       libnet is initialized in advanced mode. If the function fails
       libnet_geterror() can tell you why.

       Parameters:
           l pointer to a libnet context
           packet a pointer to the packet to inject
           packet_s the size of the packet

       Returns:
           the number of bytes written, or -1 on failure

   int libnet_adv_write_raw_ipv4 (libnet_t * l, const uint8_t * packet,
       uint32_t packet_s)
       [Advanced Interface] Writes a packet the network at the raw socket
       layer. This function is useful to write a packet that has been
       constructed by hand by the application programmer or, more commonly, to
       write a packet that has been returned by a call to
       libnet_adv_cull_packet(). This function is part of the advanced
       interface and is only available when libnet is initialized in advanced
       mode. If the function fails libnet_geterror() can tell you why.

       Parameters:
           l pointer to a libnet context
           packet a pointer to the packet to inject
           packet_s the size of the packet

       Returns:
           the number of bytes written, or -1 on failure

   libnet_ptag_t libnet_autobuild_arp (uint16_t op, const uint8_t * sha, const
       uint8_t * spa, const uint8_t * tha, uint8_t * tpa, libnet_t * l)
       Autouilds an Address Resolution Protocol (ARP) header. Depending on the
       op value, the function builds one of several different types of RFC 826
       or RFC 903 RARP packets.

       Parameters:
           op ARP operation type
           sha sender's hardware address
           spa sender's protocol address
           tha target hardware address
           tpa targer protocol address
           l pointer to a libnet context

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_autobuild_ethernet (const uint8_t * dst, uint16_t
       type, libnet_t * l)
       Autobuilds an Ethernet header. The RFC 894 Ethernet II header is almost
       identical to the IEEE 802.3 header, with the exception that the field
       immediately following the source address holds the layer 3 protocol (as
       opposed to frame's length). You should only use this function when
       libnet is initialized with the LIBNET_LINK interface.

       Parameters:
           dst destination ethernet address
           type upper layer protocol type
           l pointer to a libnet context

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_autobuild_fddi (uint8_t fc, const uint8_t * dst,
       uint8_t dsap, uint8_t ssap, uint8_t cf, const uint8_t * oui, uint16_t
       type, libnet_t * l)
       Autobuilds a Fiber Distributed Data Interface (FDDI) header.

       Parameters:
           fc class format and priority
           dst destination fddi address
           dsap destination service access point
           ssap source service access point
           cf cf
           oui IEEE organizational code
           type upper layer protocol
           l pointer to a libnet context

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_autobuild_ipv4 (uint16_t len, uint8_t prot, uint32_t
       dst, libnet_t * l)
       Autobuilds a version 4 Internet Protocol (IP) header. The function is
       useful to build an IP header quickly when you do not need a granular
       level of control. The function takes the same len, prot, and dst
       arguments as libnet_build_ipv4(). The function does not accept a ptag
       argument, but it does return a ptag. In other words, you can use it to
       build a new IP header but not to modify an existing one.

       Parameters:
           len total length of the IP packet including all subsequent data
           prot upper layer protocol
           dst destination IPv4 address (little endian)
           l pointer to a libnet context

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_autobuild_ipv6 (uint16_t len, uint8_t nh, struct
       libnet_in6_addr dst, libnet_t * l, libnet_ptag_t ptag)
       This function is not yet implement and is a NOOP.

       Parameters:
           len length
           nh next header
           dst destination IPv6 address
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_autobuild_link (const uint8_t * dst, const uint8_t *
       oui, uint16_t type, libnet_t * l)
       Automatically builds a link layer header for an initialized l. The
       function determines the proper link layer header format from how l was
       initialized. The function current supports Ethernet and Token Ring link
       layers.

       Parameters:
           dst the destination MAC address
           oui Organizationally Unique Identifier (unused for Ethernet)
           type the upper layer protocol type
           l pointer to a libnet context

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_autobuild_token_ring (uint8_t ac, uint8_t fc, const
       uint8_t * dst, uint8_t dsap, uint8_t ssap, uint8_t cf, const uint8_t *
       oui, uint16_t type, libnet_t * l)
       Auto-builds a token ring header.

       Parameters:
           ac access control
           fc frame control
           dst destination address
           dsap destination service access point
           ssap source service access point
           cf control field
           oui Organizationally Unique Identifier
           type upper layer protocol type
           l pointer to a libnet context

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_802_1q (const uint8_t * dst, const uint8_t *
       src, uint16_t tpi, uint8_t priority, uint8_t cfi, uint16_t vlan_id,
       uint16_t len_proto, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
Packet Builder Functions
       The core of libnet is the platform-independent packet-building
       functionality. These functions enable an application programmer to
       build protocol headers (and data) in a simple and consistent manner
       without having to worry (too much) about low-level network odds and
       ends. Each libnet_build() function builds a piece of a packet
       (generally a protocol header). While it is perfectly possible to build
       an entire, ready-to-transmit packet with a single call to a
       libnet_build() function, generally more than one builder-class function
       call is required to construct a full packet. A complete wire-ready
       packet generally consists of more than one piece. Every function that
       builds a protocol header takes a series of arguments roughly
       corresponding to the header values as they appear on the wire. This
       process is intuitive but often makes for functions with huge prototypes
       and large stack frames. One important thing to note is that you must
       call these functions in order, corresponding to how they should appear
       on the wire (from the highest protocol layer on down). This building
       process is intuitive; it approximates what happens in an operating
       system kernel. In other words, to build a Network Time Protocol (NTP)
       packet by using the link-layer interface, the application programmer
       would call the libnet_build() functions in the following order: 1.
       libnet_build_ntp() 2. libnet_build_udp() 3. libnet_build_ipv4() 4.
       libnet_build_ethernet() This ordering is essential for libnet 1.1.x to
       properly link together the packet internally (previous libnet versions
       did not have the requirement).

   The Payload Interface
       The payload interface specifies an optional way to include data
       directly after the protocol header in question. You can use this
       function for a variety of purposes, including the following:

       o Including additional or arbitrary protocol header information that is
         not available from a libnet interface

       o Including a packet payload (data segment)

       o Building another protocol header that is not available from a libnet
         interface To employ the interface, the application programmer should
         construct the i payload data and pass a const uint8_t * to this data
         and its size to the desired libnet_build() function. Libnet handles
         the rest.

       It is important to note that some functions (notably the IPv6 builders)
       do use the payload interface to specify variable length but ostensibly
       non-optional data. See the individual libnet_build_ipv6*() functions
       for more information.

   Protocol Tags and Packet Builder Return Values
       Libnet uses the protocol tag (ptag) to identify individual pieces of a
       packet after being created. A new ptag results every time a
       libnet_build() function with an empty (0) ptag argument completes
       successfully. This new ptag now refers to the packet piece just
       created. The application programmer's responsibility is to save this
       value if he or she plans to modify this particular portion later on in
       the program. If the application programmer needs to modify some portion
       of that particular packet piece again, he or she calls the same
       libnet_build() function specifying the saved ptag argument. Libnet then
       searches for that packet piece and modifies it rather than creating a
       new one. Upon failure for any reason, libnet_build() functions return
       -1; libnet_geterror() tells you why. Builds an IEEE 802.1q VLAN tagging
       header. Depending on the value of len_proto, the function wraps the
       802.1q header inside either an IEEE 802.3 header or an RFC 894 Ethernet
       II (DIX) header (both resulting in an 18-byte frame). If len is 1500 or
       less, most receiving protocol stacks parse the frame as an IEEE 802.3
       encapsulated frame. If len is one of the Ethernet type values, most
       protocol stacks parse the frame as an RFC 894 Ethernet II encapsulated
       frame. Note the length value is calculated without the 802.1q header of
       18 bytes.

       Parameters:
           dst pointer to a six byte source ethernet address
           src pointer to a six byte destination ethernet address
           tpi tag protocol identifier
           priority priority
           cfi canonical format indicator
           vlan_id vlan identifier
           len_proto length (802.3) protocol (Ethernet II)
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_802_1x (uint8_t eap_ver, uint8_t eap_type,
       uint16_t length, const uint8_t * payload, uint32_t payload_s, libnet_t
       * l, libnet_ptag_t ptag)
       Builds an IEEE 802.1x extended authentication protocol header.

       Parameters:
           eap_ver the EAP version
           eap_type the EAP type
           length frame length
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_802_2 (uint8_t dsap, uint8_t ssap, uint8_t
       control, const uint8_t * payload, uint32_t payload_s, libnet_t * l,
       libnet_ptag_t ptag)
       Builds an IEEE 802.2 LLC header.

       Parameters:
           dsap destination service access point
           ssap source service access point
           control control field
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_802_2snap (uint8_t dsap, uint8_t ssap, uint8_t
       control, uint8_t * oui, uint16_t type, const uint8_t * payload,
       uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds an IEEE 802.2 LLC SNAP header.

       Parameters:
           dsap destination service access point
           ssap source service access point
           control control field
           oui Organizationally Unique Identifier
           type upper layer protocol
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_802_3 (const uint8_t * dst, const uint8_t * src,
       uint16_t len, const uint8_t * payload, uint32_t payload_s, libnet_t *
       l, libnet_ptag_t ptag)
       Builds an IEEE 802.3 header. The 802.3 header is almost identical to
       the RFC 894 Ethernet II header, the exception being that the field
       immediately following the source address holds the frame's length (as
       opposed to the layer 3 protocol). You should only use this function
       when libnet is initialized with the LIBNET_LINK interface.

       Parameters:
           dst destination ethernet address
           src source ethernet address
           len frame length sans header
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_arp (uint16_t hrd, uint16_t pro, uint8_t hln,
       uint8_t pln, uint16_t op, const uint8_t * sha, const uint8_t * spa,
       const uint8_t * tha, const uint8_t * tpa, const uint8_t * payload,
       uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds an Address Resolution Protocol (ARP) header. Depending on the op
       value, the function builds one of several different types of RFC 826 or
       RFC 903 RARP packets.

       Parameters:
           hrd hardware address format
           pro protocol address format
           hln hardware address length
           pln protocol address length
           op ARP operation type
           sha sender's hardware address
           spa sender's protocol address
           tha target hardware address
           tpa targer protocol address
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_bgp4_header (uint8_t
       marker[LIBNET_BGP4_MARKER_SIZE], uint16_t len, uint8_t type, const
       uint8_t * payload, uint32_t payload_s, libnet_t * l, libnet_ptag_t
       ptag)
       Builds an RFC 1771 Border Gateway Protocol 4 (BGP-4) header. The
       primary function of a BGP speaking system is to exchange network
       reachability information with other BGP systems. This network
       reachability information includes information on the list of Autonomous
       Systems (ASs) that reachability information traverses. This information
       is sufficient to construct a graph of AS connectivity from which
       routing loops may be pruned and some policy decisions at the AS level
       may be enforced. This function builds the base BGP header which is used
       as a preamble before any other BGP header. For example, a BGP KEEPALIVE
       message may be built with only this function, while an error
       notification requires a subsequent call to
       libnet_build_bgp4_notification.

       Parameters:
           marker a value the receiver can predict (if the message type is not
           BGP OPEN, or no authentication is used, these 16 bytes are normally
           set as all ones)
           len total length of the BGP message, including the header
           type type code of the message (OPEN, UPDATE, NOTIFICATION or
           KEEPALIVE)
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_bgp4_notification (uint8_t err_code, uint8_t
       err_subcode, const uint8_t * payload, uint32_t payload_s, libnet_t * l,
       libnet_ptag_t ptag)
       Builds an RFC 1771 Border Gateway Protocol 4 (BGP-4) notification
       header. A NOTIFICATION message is sent when an error condition is
       detected. Specific error information may be passed through the payload
       interface.

       Parameters:
           err_code type of notification
           err_subcode more specific information about the reported error.
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_bgp4_open (uint8_t version, uint16_t src_as,
       uint16_t hold_time, uint32_t bgp_id, uint8_t opt_len, const uint8_t *
       payload, uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds an RFC 1771 Border Gateway Protocol 4 (BGP-4) OPEN header. This
       is the first message sent by each side of a BGP connection. The
       optional parameters options should be constructed using the payload
       interface (see RFC 1771 for the options structures).

       Parameters:
           version protocol version (should be set to 4)
           src_as Autonomous System of the sender
           hold_time used to compute the maximum allowed time between the
           receipt of KEEPALIVE, and/or UPDATE messages by the sender
           bgp_id BGP identifier of the sender
           opt_len total length of the optional parameters field in bytes
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_bgp4_update (uint16_t unfeasible_rt_len, const
       uint8_t * withdrawn_rt, uint16_t total_path_attr_len, const uint8_t *
       path_attributes, uint16_t info_len, uint8_t * reachability_info, const
       uint8_t * payload, uint32_t payload_s, libnet_t * l, libnet_ptag_t
       ptag)
       Builds an RFC 1771 Border Gateway Protocol 4 (BGP-4) update header.
       Update messages are used to transfer routing information between BGP
       peers.

       Parameters:
           unfeasible_rt_len indicates the length of the (next) 'withdrawn
           routes' field in bytes
           withdrawn_rt list of IP addresses prefixes for the routes that are
           being withdrawn; each IP address prefix is built as a 2-tuple
           <length (1 byte), prefix (variable)>
           total_path_attr_len indicates the length of the (next) 'path
           attributes' field in bytes
           path_attributes each attribute is a 3-tuple <type (2 bytes),
           length, value>
           info_len indicates the length of the (next) 'network layer
           reachability information' field in bytes (needed for internal
           memory size calculation)
           reachability_info 2-tuples <length (1 byte), prefix (variable)>.
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_bootpv4 (uint8_t opcode, uint8_t htype, uint8_t
       hlen, uint8_t hopcount, uint32_t xid, uint16_t secs, uint16_t flags,
       uint32_t cip, uint32_t yip, uint32_t sip, uint32_t gip, const uint8_t *
       chaddr, uint8_t * sname, const uint8_t * file, const uint8_t * payload,
       uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Parameters:
           opcode
           htype
           hlen
           hopcount
           xid
           secs
           flags
           cip
           yip
           sip
           gip
           chaddr
           sname
           file
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_cdp (uint8_t version, uint8_t ttl, uint16_t sum,
       uint16_t type, uint16_t value_s, const uint8_t * value, const uint8_t *
       payload, uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds a Cisco Discovery Protocol (CDP) header. Cisco Systems designed
       CDP to aid in the network management of adjacent Cisco devices. The CDP
       protocol specifies data by using a type/length/value (TLV) setup. The
       first TLV can specified by using the functions type, length, and value
       arguments. To specify additional TLVs, the programmer could either use
       the payload interface or libnet_build_data() to construct them.

       Parameters:
           version CDP version
           ttl time to live (time information should be cached by recipient)
           sum checksum (0 for libnet to autofill)
           type type of data contained in value
           value_s length of value argument
           value the CDP information string
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_data (const uint8_t * payload, uint32_t
       payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds a generic libnet protocol header. This is useful for including
       an optional payload to a packet that might need to change repeatedly
       inside of a loop. This won't work for TCP or IP payload, they have
       special types (this is probably a bug).

       Parameters:
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_dhcpv4 (uint8_t opcode, uint8_t htype, uint8_t
       hlen, uint8_t hopcount, uint32_t xid, uint16_t secs, uint16_t flags,
       uint32_t cip, uint32_t yip, uint32_t sip, uint32_t gip, const uint8_t *
       chaddr, uint8_t * sname, const uint8_t * file, const uint8_t * payload,
       uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Parameters:
           opcode
           htype
           hlen
           hopcount
           xid
           secs
           flags
           cip
           yip
           sip
           gip
           chaddr
           sname
           file
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_dnsv4 (uint16_t h_len, uint16_t id, uint16_t
       flags, uint16_t num_q, uint16_t num_anws_rr, uint16_t num_auth_rr,
       uint16_t num_addi_rr, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Builds an RFC 1035 version 4 DNS header. Additional DNS payload
       information should be specified using the payload interface.

       Parameters:
           h_len
           id DNS packet id
           flags control flags
           num_q number of questions
           num_anws_rr number of answer resource records
           num_auth_rr number of authority resource records
           num_addi_rr number of additional resource records
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_egre (uint16_t fv, uint16_t type, uint16_t sum,
       uint16_t offset, uint32_t key, uint32_t seq, uint16_t len, const
       uint8_t * payload, uint32_t payload_s, libnet_t * l, libnet_ptag_t
       ptag)
       Generic Routing Encapsulation (GRE - RFC 1701) is used to encapsulate
       any protocol. Hence, the IP part of the packet is usually referred as
       'delivery header'. It is then followed by the GRE header and finally
       the encapsulated packet (IP or whatever). As GRE is very modular, the
       first GRE header describes the structure of the header, using bits and
       flag to specify which fields will be present in the header.

       Parameters:
           fv the 16 0 to 7: which fields are included in the header
           (checksum, seq. number, key, ...), bits 8 to 12: flag, bits 13 to
           15: version.
           type which protocol is encapsulated (PPP, IP, ...)
           sum checksum (0 for libnet to autofill).
           offset byte offset from the start of the routing field to the first
           byte of the SRE
           key inserted by the encapsulator to authenticate the source
           seq sequence number used by the receiver to sort the packets
           len size of the GRE packet
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ethernet (const uint8_t * dst, const uint8_t *
       src, uint16_t type, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Builds an Ethernet header. The RFC 894 Ethernet II header is almost
       identical to the IEEE 802.3 header, with the exception that the field
       immediately following the source address holds the layer 3 protocol (as
       opposed to frame's length). You should only use this function when
       libnet is initialized with the LIBNET_LINK interface.

       Parameters:
           dst destination ethernet address
           src source ethernet address
           type upper layer protocol type
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_fddi (uint8_t fc, const uint8_t * dst, const
       uint8_t * src, uint8_t dsap, uint8_t ssap, uint8_t cf, const uint8_t *
       oui, uint16_t type, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Builds a Fiber Distributed Data Interface (FDDI) header.

       Parameters:
           fc class format and priority
           dst destination fddi address
           src source fddi address
           dsap destination service access point
           ssap source service access point
           cf cf
           oui 3 byte IEEE organizational code
           type upper layer protocol
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_gre (uint16_t fv, uint16_t type, uint16_t sum,
       uint16_t offset, uint32_t key, uint32_t seq, uint16_t len, const
       uint8_t * payload, uint32_t payload_s, libnet_t * l, libnet_ptag_t
       ptag)
       Generic Routing Encapsulation (GRE - RFC 1701) is used to encapsulate
       any protocol. Hence, the IP part of the packet is usually referred as
       'delivery header'. It is then followed by the GRE header and finally
       the encapsulated packet (IP or whatever). As GRE is very modular, the
       first GRE header describes the structure of the header, using bits and
       flag to specify which fields will be present in the header.

       Parameters:
           fv the 16 0 to 7: which fields are included in the header
           (checksum, seq. number, key, ...), bits 8 to 12: flag, bits 13 to
           15: version.
           type which protocol is encapsulated (PPP, IP, ...)
           sum checksum (0 for libnet to autofill).
           offset byte offset from the start of the routing field to the first
           byte of the SRE
           key inserted by the encapsulator to authenticate the source
           seq sequence number used by the receiver to sort the packets
           len size of the GRE packet
           payload
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_gre_last_sre (libnet_t * l, libnet_ptag_t ptag)
       Parameters:
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_gre_sre (uint16_t af, uint8_t offset, uint8_t
       length, uint8_t * routing, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Parameters:
           af
           offset
           length
           routing
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_hsrp (uint8_t version, uint8_t opcode, uint8_t
       state, uint8_t hello_time, uint8_t hold_time, uint8_t priority, uint8_t
       group, uint8_t reserved, uint8_t authdata[HSRP_AUTHDATA_LENGTH],
       uint32_t virtual_ip, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Builds a HSRP header. HSRP is a Cisco propietary protocol defined in
       RFC 2281

       Parameters:
           version version of the HSRP messages
           opcode type of message
           state current state of the router
           hello_time period in seconds between hello messages
           hold_time seconds that the current hello message is valid
           priority priority for the election proccess
           group standby group
           reserved reserved field
           authdata password
           virtual_ip virtual ip address
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_icmpv4_echo (uint8_t type, uint8_t code,
       uint16_t sum, uint16_t id, uint16_t seq, const uint8_t * payload,
       uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds an IP version 4 RFC 792 Internet Control Message Protocol (ICMP)
       echo request/reply header

       Parameters:
           type type of ICMP packet (should be ICMP_ECHOREPLY or ICMP_ECHO)
           code code of ICMP packet (should be 0)
           sum checksum (0 for libnet to autofill)
           id identification number
           seq packet sequence number
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_icmpv4_mask (uint8_t type, uint8_t code,
       uint16_t sum, uint16_t id, uint16_t seq, uint32_t mask, const uint8_t *
       payload, uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds an IP version 4 RFC 792 Internet Control Message Protocol (ICMP)
       IP netmask request/reply header.

       Parameters:
           type type of ICMP packet (should be ICMP_MASKREQ or ICMP_MASKREPLY)
           code code of ICMP packet (should be 0)
           sum checksum (0 for libnet to autofill)
           id identification number
           seq packet sequence number
           mask subnet mask
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_icmpv4_redirect (uint8_t type, uint8_t code,
       uint16_t sum, uint32_t gateway, const uint8_t * payload, uint32_t
       payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds an IP version 4 RFC 792 Internet Message Control Protocol (ICMP)
       redirect header. The IP header that caused the error message should be
       built by a previous call to libnet_build_ipv4().

       Parameters:
           type type of ICMP packet (should be ICMP_REDIRECT)
           code code of ICMP packet (should be one of the four redirect codes)
           sum checksum (0 for libnet to autofill)
           gateway
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_icmpv4_timeexceed (uint8_t type, uint8_t code,
       uint16_t sum, const uint8_t * payload, uint32_t payload_s, libnet_t *
       l, libnet_ptag_t ptag)
       Builds an IP version 4 RFC 792 Internet Control Message Protocol (ICMP)
       time exceeded header. The IP header that caused the error message
       should be built by a previous call to libnet_build_ipv4().

       Parameters:
           type type of ICMP packet (should be ICMP_TIMXCEED)
           code code of ICMP packet (ICMP_TIMXCEED_INTRANS /
           ICMP_TIMXCEED_REASS)
           sum checksum (0 for libnet to autofill)
           payload optional payload or NULL
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_icmpv4_timestamp (uint8_t type, uint8_t code,
       uint16_t sum, uint16_t id, uint16_t seq, uint32_t otime, uint32_t
       rtime, uint32_t ttime, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Builds an IP version 4 RFC 792 Internet Control Message Protocol (ICMP)
       timestamp request/reply header.

       Parameters:
           type type of ICMP packet (should be ICMP_TSTAMP or
           ICMP_TSTAMPREPLY)
           code code of ICMP packet (should be 0)
           sum checksum (0 for libnet to autofill)
           id identification number
           seq sequence number
           otime originate timestamp
           rtime receive timestamp
           ttime transmit timestamp
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_icmpv4_unreach (uint8_t type, uint8_t code,
       uint16_t sum, const uint8_t * payload, uint32_t payload_s, libnet_t *
       l, libnet_ptag_t ptag)
       Builds an IP version 4 RFC 792 Internet Control Message Protocol (ICMP)
       unreachable header. The IP header that caused the error message should
       be built by a previous call to libnet_build_ipv4().

       Parameters:
           type type of ICMP packet (should be ICMP_UNREACH)
           code code of ICMP packet (should be one of the 16 unreachable
           codes)
           sum checksum (0 for libnet to autofill)
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_icmpv6_unreach (u_int8_t type, u_int8_t code,
       u_int16_t sum, u_int8_t * payload, u_int32_t payload_s, libnet_t * l,
       libnet_ptag_t ptag)
       Builds an IP version 6 RFC 4443 Internet Control Message Protocol
       (ICMP) unreachable header. The IP header that caused the error message
       should be built by a previous call to libnet_build_ipv6().

       Parameters:
           type type of ICMP packet (should be ICMP6_UNREACH)
           code code of ICMP packet (should be one of the 5 unreachable codes)
           sum checksum (0 for libnet to autofill)
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_igmp (uint8_t type, uint8_t code, uint16_t sum,
       uint32_t ip, const uint8_t * payload, uint32_t payload_s, libnet_t * l,
       libnet_ptag_t ptag)
       Builds an RFC 1112 Internet Group Memebership Protocol (IGMP) header.

       Parameters:
           type packet type
           code packet code (should be 0)
           sum checksum (0 for libnet to autofill)
           ip IPv4 address
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ipsec_ah (uint8_t nh, uint8_t len, uint16_t res,
       uint32_t spi, uint32_t seq, uint32_t auth, const uint8_t * payload,
       uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds an Internet Protocol Security Authentication header.

       Parameters:
           nh next header
           len payload length
           res reserved
           spi security parameter index
           seq sequence number
           auth authentication data
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ipsec_esp_ftr (uint8_t len, uint8_t nh, int8_t *
       auth, const uint8_t * payload, uint32_t payload_s, libnet_t * l,
       libnet_ptag_t ptag)
       Builds an Internet Protocol Security Encapsulating Security Payload
       footer.

       Parameters:
           len padding length
           nh next header
           auth authentication data
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ipsec_esp_hdr (uint32_t spi, uint32_t seq,
       uint32_t iv, const uint8_t * payload, uint32_t payload_s, libnet_t * l,
       libnet_ptag_t ptag)
       Builds an Internet Protocol Security Encapsulating Security Payload
       header.

       Parameters:
           spi security parameter index
           seq ESP sequence number
           iv initialization vector
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ipv4 (uint16_t ip_len, uint8_t tos, uint16_t id,
       uint16_t frag, uint8_t ttl, uint8_t prot, uint16_t sum, uint32_t src,
       uint32_t dst, const uint8_t * payload, uint32_t payload_s, libnet_t *
       l, libnet_ptag_t ptag)
       Builds a version 4 RFC 791 Internet Protocol (IP) header.

       Parameters:
           ip_len total length of the IP packet including all subsequent data
           (subsequent data includes any IP options and IP options padding)
           tos type of service bits
           id IP identification number
           frag fragmentation bits and offset
           ttl time to live in the network
           prot upper layer protocol
           sum checksum (0 for libnet to autofill)
           src source IPv4 address (little endian)
           dst destination IPv4 address (little endian)
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ipv4_options (const uint8_t * options, uint32_t
       options_s, libnet_t * l, libnet_ptag_t ptag)
       Builds an version 4 Internet Protocol (IP) options header. The function
       expects options to be a valid IP options string of size options_s, no
       larger than 40 bytes (the maximum size of an options string).

       When building a chain, the options must be built, then the IPv4 header.

       When updating a chain, if the block following the options is an IPv4
       header, it's total length and header length will be updated if the
       options block size changes.

       Parameters:
           options byte string of IP options (it will be padded up to be an
           integral multiple of 32-bit words).
           options_s length of options string
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ipv6 (uint8_t tc, uint32_t fl, uint16_t len,
       uint8_t nh, uint8_t hl, struct libnet_in6_addr src, struct
       libnet_in6_addr dst, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Builds a version 6 RFC 2460 Internet Protocol (IP) header.

       Parameters:
           tc traffic class
           fl flow label
           len total length of the IP packet
           nh next header
           hl hop limit
           src source IPv6 address
           dst destination IPv6 address
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ipv6_destopts (uint8_t nh, uint8_t len, const
       uint8_t * payload, uint32_t payload_s, libnet_t * l, libnet_ptag_t
       ptag)
       Builds a version 6 RFC 2460 Internet Protocol (IP) destination options
       header. This function is special in that it uses the payload interface
       to include the options data. The application programmer will build an
       IPv6 options byte string and pass it to the function using the payload
       interface.

       Parameters:
           nh next header
           len length of the header in 8-byte octets not including the first 8
           octets
           payload options payload
           payload_s payload length
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ipv6_frag (uint8_t nh, uint8_t reserved,
       uint16_t frag, uint32_t id, const uint8_t * payload, uint32_t
       payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds a version 6 RFC 2460 Internet Protocol (IP) fragmentation
       header.

       Parameters:
           nh next header
           reserved unused value... OR IS IT!
           frag fragmentation bits (ala ipv4)
           id packet identification
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ipv6_hbhopts (uint8_t nh, uint8_t len, const
       uint8_t * payload, uint32_t payload_s, libnet_t * l, libnet_ptag_t
       ptag)
       Builds a version 6 RFC 2460 Internet Protocol (IP) hop by hop options
       header. This function is special in that it uses the payload interface
       to include the options data. The application programmer will build an
       IPv6 hop by hop options byte string and pass it to the function using
       the payload interface.

       Parameters:
           nh next header
           len length of the header in 8-byte octets not including the first 8
           octets
           payload options payload
           payload_s payload length
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ipv6_routing (uint8_t nh, uint8_t len, uint8_t
       rtype, uint8_t segments, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Builds a version 6 RFC 2460 Internet Protocol (IP) routing header. This
       function is special in that it uses the payload interface to include
       the 'type-specific data'; that is the routing information. Most often
       this will be a number of 128-bit IPv6 addresses. The application
       programmer will build a byte string of IPv6 address and pass them to
       the function using the payload interface.

       Parameters:
           nh next header
           len length of the header in 8-byte octets not including the first 8
           octets
           rtype routing header type
           segments number of routing segments that follow
           payload optional payload of routing information
           payload_s payload length
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_isl (uint8_t * dhost, uint8_t type, uint8_t
       user, uint8_t * shost, uint16_t len, const uint8_t * snap, uint16_t
       vid, uint16_t portindex, uint16_t reserved, const uint8_t * payload,
       uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds a Cisco Inter-Switch Link (ISL) header.

       Parameters:
           dhost destination address (should be 01:00:0c:00:00)
           type type of frame
           user user defined data
           shost source mac address
           len total length of the encapuslated packet less 18 bytes
           snap SNAP information (0xaaaa03 + vendor code)
           vid 15 bit VLAN ID, 1 bit BPDU or CDP indicator
           portindex port index
           reserved used for FDDI and token ring
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_link (const uint8_t * dst, const uint8_t * src,
       const uint8_t * oui, uint16_t type, const uint8_t * payload, uint32_t
       payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds a link layer header for an initialized l. The function
       determines the proper link layer header format from how l was
       initialized. The function current supports Ethernet and Token Ring link
       layers.

       Parameters:
           dst the destination MAC address
           src the source MAC address
           oui Organizationally Unique Identifier (unused for Ethernet)
           type the upper layer protocol type
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_mpls (uint32_t label, uint8_t experimental,
       uint8_t bos, uint8_t ttl, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Builds an RFC 3032 Multi-Protocol Label Switching (MPLS) header.

       Parameters:
           label 20-bit label value
           experimental 3-bit reserved field
           bos 1-bit bottom of stack identifier
           ttl time to live
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ntp (uint8_t leap_indicator, uint8_t version,
       uint8_t mode, uint8_t stratum, uint8_t poll, uint8_t precision,
       uint16_t delay_int, uint16_t delay_frac, uint16_t dispersion_int,
       uint16_t dispersion_frac, uint32_t reference_id, uint32_t ref_ts_int,
       uint32_t ref_ts_frac, uint32_t orig_ts_int, uint32_t orig_ts_frac,
       uint32_t rec_ts_int, uint32_t rec_ts_frac, uint32_t xmt_ts_int,
       uint32_t xmt_ts_frac, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Builds an RFC 958 Network Time Protocol (NTP) header.

       Parameters:
           leap_indicator the leap indicator
           version NTP protocol version
           mode NTP mode
           stratum stratum
           poll polling interval
           precision precision
           delay_int delay interval
           delay_frac delay fraction
           dispersion_int dispersion interval
           dispersion_frac dispersion fraction
           reference_id reference id
           ref_ts_int reference timestamp integer
           ref_ts_frac reference timestamp fraction
           orig_ts_int original timestamp integer
           orig_ts_frac original timestamp fraction
           rec_ts_int receiver timestamp integer
           rec_ts_frac reciever timestamp fraction
           xmt_ts_int transmit timestamp integer
           xmt_ts_frac transmit timestamp integer
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ospfv2 (uint16_t len, uint8_t type, uint32_t
       rtr_id, uint32_t area_id, uint16_t sum, uint16_t autype, const uint8_t
       * payload, uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Parameters:
           len
           type
           rtr_id
           area_id
           sum
           autype
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ospfv2_dbd (uint16_t dgram_len, uint8_t opts,
       uint8_t type, uint seqnum, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Parameters:
           dgram_len
           opts
           type
           seqnum
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ospfv2_hello (uint32_t netmask, uint16_t
       interval, uint8_t opts, uint8_t priority, uint dead_int, uint32_t
       des_rtr, uint32_t bkup_rtr, const uint8_t * payload, uint32_t
       payload_s, libnet_t * l, libnet_ptag_t ptag)
       Parameters:
           netmask
           interval
           opts
           priority
           dead_int
           des_rtr
           bkup_rtr
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ospfv2_lsa (uint16_t age, uint8_t opts, uint8_t
       type, uint lsid, uint32_t advrtr, uint seqnum, uint16_t sum, uint16_t
       len, const uint8_t * payload, uint32_t payload_s, libnet_t * l,
       libnet_ptag_t ptag)
       Parameters:
           age
           opts
           type
           lsid
           advrtr
           seqnum
           sum
           len
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ospfv2_lsa_as (uint32_t nmask, uint metric,
       uint32_t fwdaddr, uint tag, const uint8_t * payload, uint32_t
       payload_s, libnet_t * l, libnet_ptag_t ptag)
       Parameters:
           nmask
           metric
           fwdaddr
           tag
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ospfv2_lsa_net (uint32_t nmask, uint rtrid,
       const uint8_t * payload, uint32_t payload_s, libnet_t * l,
       libnet_ptag_t ptag)
       Parameters:
           nmask
           rtrid
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ospfv2_lsa_rtr (uint16_t flags, uint16_t num,
       uint id, uint data, uint8_t type, uint8_t tos, uint16_t metric, const
       uint8_t * payload, uint32_t payload_s, libnet_t * l, libnet_ptag_t
       ptag)
       Parameters:
           flags
           num
           id
           data
           type
           tos
           metric
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ospfv2_lsa_sum (uint32_t nmask, uint metric,
       uint tos, const uint8_t * payload, uint32_t payload_s, libnet_t * l,
       libnet_ptag_t ptag)
       Parameters:
           nmask
           metric
           tos
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ospfv2_lsr (uint type, uint lsid, uint32_t
       advrtr, const uint8_t * payload, uint32_t payload_s, libnet_t * l,
       libnet_ptag_t ptag)
       Parameters:
           type
           lsid
           advrtr
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_ospfv2_lsu (uint num, const uint8_t * payload,
       uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Parameters:
           num
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_rip (uint8_t cmd, uint8_t version, uint16_t rd,
       uint16_t af, uint16_t rt, uint32_t addr, uint32_t mask, uint32_t
       next_hop, uint32_t metric, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Builds a Routing Information Protocol header (RFCs 1058 and 2453).

       Parameters:
           cmd command
           version protocol version
           rd version one: 0, version two: routing domain
           af address family
           rt version one: 0, version two: route tag
           addr IPv4 address
           mask version one: 0, version two: subnet mask
           next_hop version one: 0, version two: next hop address
           metric routing metric
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_rpc_call (uint32_t rm, uint32_t xid, uint32_t
       prog_num, uint32_t prog_vers, uint32_t procedure, uint32_t cflavor,
       uint32_t clength, uint8_t * cdata, uint32_t vflavor, uint32_t vlength,
       const uint8_t * vdata, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Builds an Remote Procedure Call (Version 2) Call message header as
       specified in RFC 1831. This builder provides the option for specifying
       the record marking which is required when used with streaming protocols
       (TCP).

       Parameters:
           rm record marking indicating the position in a stream, 0 otherwise
           xid transaction identifier used to link calls and replies
           prog_num remote program specification typically between 0 -
           1fffffff
           prog_vers remote program version specification
           procedure procedure to be performed by remote program
           cflavor authentication credential type
           clength credential length (should be 0)
           cdata opaque credential data (currently unused)
           vflavor authentication verifier type
           vlength verifier length (should be 0)
           vdata opaque verifier data (currently unused)
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_sebek (uint32_t magic, uint16_t version,
       uint16_t type, uint32_t counter, uint32_t time_sec, uint32_t time_usec,
       uint32_t pid, uint32_t uid, uint32_t fd, uint8_t cmd[SEBEK_CMD_LENGTH],
       uint32_t length, const uint8_t * payload, uint32_t payload_s, libnet_t
       * l, libnet_ptag_t ptag)
       Builds a Sebek header. The Sebek protocol was designed by the Honeynet
       Project as a transport mechanism for post-intrusion forensic data. More
       information may be found here:
       http://www.honeynet.org/papers/sebek.pdf.

       Parameters:
           magic identify packets that should be hidden
           version protocol version, currently 1
           type type of record (read data is type 0, write data is type 1)
           counter PDU counter used to identify when packet are lost
           time_sec seconds since EPOCH according to the honeypot
           time_usec residual microseconds
           pid PID
           uid UID
           fd FD
           cmd 12 first characters of the command
           length length in bytes of the PDU's body
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_stp_conf (uint16_t id, uint8_t version, uint8_t
       bpdu_type, uint8_t flags, const uint8_t * root_id, uint32_t root_pc,
       const uint8_t * bridge_id, uint16_t port_id, uint16_t message_age,
       uint16_t max_age, uint16_t hello_time, uint16_t f_delay, const uint8_t
       * payload, uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds an IEEE 802.1d Spanning Tree Protocol (STP) configuration
       header. STP frames are usually encapsulated inside of an 802.2 + 802.3
       frame combination.

       Parameters:
           id protocol id
           version protocol version
           bpdu_type bridge protocol data unit type
           flags flags
           root_id root id
           root_pc root path cost
           bridge_id bridge id
           port_id port id
           message_age message age
           max_age max age
           hello_time hello time
           f_delay forward delay
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_stp_tcn (uint16_t id, uint8_t version, uint8_t
       bpdu_type, const uint8_t * payload, uint32_t payload_s, libnet_t * l,
       libnet_ptag_t ptag)
       Builds an IEEE 802.1d Spanning Tree Protocol (STP) topology change
       notification header. STP frames are usually encapsulated inside of an
       802.2 + 802.3 frame combination.

       Parameters:
           id protocol id
           version protocol version
           bpdu_type bridge protocol data unit type
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_tcp (uint16_t sp, uint16_t dp, uint32_t seq,
       uint32_t ack, uint8_t control, uint16_t win, uint16_t sum, uint16_t
       urg, uint16_t len, const uint8_t * payload, uint32_t payload_s,
       libnet_t * l, libnet_ptag_t ptag)
       Builds an RFC 793 Transmission Control Protocol (TCP) header.

       Parameters:
           sp source port
           dp destination port
           seq sequence number
           ack acknowledgement number
           control control flags
           win window size
           sum checksum (0 for libnet to autofill)
           urg urgent pointer
           len total length of the TCP packet (for checksum calculation)
           payload
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_tcp_options (const uint8_t * options, uint32_t
       options_s, libnet_t * l, libnet_ptag_t ptag)
       Builds an RFC 793 Transmission Control Protocol (TCP) options header.
       The function expects options to be a valid TCP options string of size
       options_s, which is no larger than 40 bytes (the maximum size of an
       options string). The function checks to ensure that the packet consists
       of a TCP header preceded by an IPv4 header, and that the addition of
       the options string would not result in a packet larger than 65,535
       bytes (IPMAXPACKET). The function counts up the number of 32-bit words
       in the options string and adjusts the TCP header length value as
       necessary.

       Parameters:
           options byte string of TCP options
           options_s length of options string
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_token_ring (uint8_t ac, uint8_t fc, const
       uint8_t * dst, const uint8_t * src, uint8_t dsap, uint8_t ssap, uint8_t
       cf, const uint8_t * oui, uint16_t type, const uint8_t * payload,
       uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds a token ring header.

       Parameters:
           ac access control
           fc frame control
           dst destination address
           src source address
           dsap destination service access point
           ssap source service access point
           cf control field
           oui Organizationally Unique Identifier
           type upper layer protocol type
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_udp (uint16_t sp, uint16_t dp, uint16_t len,
       uint16_t sum, const uint8_t * payload, uint32_t payload_s, libnet_t *
       l, libnet_ptag_t ptag)
       Builds an RFC 768 User Datagram Protocol (UDP) header.

       Parameters:
           sp source port
           dp destination port
           len total length of the UDP packet
           sum checksum (0 for libnet to autofill)
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   libnet_ptag_t libnet_build_vrrp (uint8_t version, uint8_t type, uint8_t
       vrouter_id, uint8_t priority, uint8_t ip_count, uint8_t auth_type,
       uint8_t advert_int, uint16_t sum, const uint8_t * payload, uint32_t
       payload_s, libnet_t * l, libnet_ptag_t ptag)
       Builds an RFC 2338 Virtual Router Redundacy Protool (VRRP) header. Use
       the payload interface to specify address and autthentication
       information. To build a 'legal' packet, the destination IPv4 address
       should be the multicast * address 224.0.0.18, the IP TTL should be set
       to 255, and the IP protocol should be set to 112.

       Parameters:
           version VRRP version (should be 2)
           type VRRP packet type (should be 1 -- ADVERTISEMENT)
           vrouter_id virtual router identification
           priority priority (higher numbers indicate higher priority)
           ip_count number of IPv4 addresses contained in this advertisement
           auth_type type of authentication (0, 1, 2 -- see RFC)
           advert_int interval between advertisements
           sum checksum (0 for libnet to autofill)
           payload optional payload or NULL
           payload_s payload length or 0
           l pointer to a libnet context
           ptag protocol tag to modify an existing header, 0 to build a new
           one

       Returns:
           protocol tag value on success, -1 on error

   void libnet_clear_packet (libnet_t * l)
       Clears the current packet referenced and frees all pblocks. Should be
       called when the programmer want to send a completely new packet of a
       different type using the same context.

       Parameters:
           l pointer to a libnet context

   int libnet_cq_add (libnet_t * l, char * label)
       [Context Queue] Adds a new context to the libnet context queue. If no
       queue exists, this function will create the queue and add the specified
       libnet context as the first entry on the list. The functions checks to
       ensure niether l nor label are NULL, and that label doesn't refer to an
       existing context already in the queue. Additionally, l should refer to
       a libnet context previously initialized with a call to libnet_init().
       If the context queue in write locked, this function will fail.

       Parameters:
           l pointer to a libnet context
           label a canonical name given to recognize the new context, no
           longer than LIBNET_LABEL_SIZE

       Returns:
           1 on success, -1 on failure

   void libnet_cq_destroy (void)
       [Context Queue] Destroys the entire context queue, calling
       libnet_destroy() on each member context.

   uint32_t libnet_cq_end_loop (void)
       [Context Queue]

   libnet_t* libnet_cq_find_by_label (char * label)
       [Context Queue] Locates a libnet context from the queue, indexed by a
       canonical label.

       Parameters:
           label canonical label of the libnet context to retrieve

       Returns:
           the expected libnet context, NULL on failure

   const char* libnet_cq_getlabel (libnet_t * l)
       [Context Queue] Returns the canonical label associated with the
       context.

       Parameters:
           l pointer to a libnet context

       Returns:
           pointer to the libnet context's label

   libnet_t* libnet_cq_head (void)
       [Context Queue] Intiailizes the interator interface and set a write
       lock on the entire queue. This function is intended to be called just
       prior to interating through the entire list of contexts (with the
       probable intent of inject a series of packets in rapid succession).
       This function is often used as per the following:

       for (l = libnet_cq_head(); libnet_cq_last(); l = libnet_cq_next()) {
       ... }

       Much of the time, the application programmer will use the iterator as
       it is written above; as such, libnet provides a macro to do exactly
       that, for_each_context_in_cq(l). Warning: do not call the iterator more
       than once in a single loop.

       Returns:
           the head of the context queue

   int libnet_cq_last (void)
       [Context Queue] Check whether the iterator is at the last context in
       the queue.

       Returns:
           1 if at the end of the context queue, 0 otherwise

   libnet_t* libnet_cq_next (void)
       [Context Queue] Get next context from the context queue.

       Returns:
           the next context from the context queue

   libnet_t* libnet_cq_remove (libnet_t * l)
       [Context Queue] Removes a specified context from the libnet context
       queue by specifying the libnet context pointer. Note the function will
       remove the specified context from the context queue and cleanup
       internal memory from the queue, it is up to the application programmer
       to free the returned libnet context with a call to libnet_destroy().
       Also, as it is not necessary to keep the libnet context pointer when
       initially adding it to the context queue, most application programmers
       will prefer to refer to entries on the context queue by canonical name
       and would use libnet_cq_remove_by_label(). If the context queue is
       write locked, this function will fail.

       Parameters:
           l pointer to a libnet context

       Returns:
           the pointer to the removed libnet context, NULL on failure

   libnet_t* libnet_cq_remove_by_label (char * label)
       [Context Queue] Removes a specified context from the libnet context
       queue by specifying the canonical name. Note the function will remove
       the specified context from the context queue and cleanup internal
       memory from the queue, it is up to the application programmer to free
       the returned libnet context with a call to libnet_destroy(). If the
       context queue is write locked, this function will fail.

       Parameters:
           label canonical name of the context to remove

       Returns:
           the pointer to the removed libnet context, NULL on failure

   uint32_t libnet_cq_size (void)
       [Context Queue] Function returns the number of libnet contexts that are
       in the queue.

       Returns:
           the number of libnet contexts currently in the queue

   void libnet_destroy (libnet_t * l)
       Shuts down the libnet session referenced by l. It closes the network
       interface and frees all internal memory structures associated with l.

       Parameters:
           l pointer to a libnet context

   void libnet_diag_dump_context (libnet_t * l)
       [Diagnostic] Prints the contents of the given context.

       Parameters:
           l pointer to a libnet context

   void libnet_diag_dump_hex (const uint8_t * packet, uint32_t len, int swap,
       FILE * stream)
       [Diagnostic] Function prints the contents of the supplied buffer to the
       supplied stream pointer. Will swap endianness based disposition of mode
       variable. Useful to be used in conjunction with the advanced interface
       and a culled packet.

       Parameters:
           packet the packet to print
           len length of the packet in bytes
           swap 1 to swap byte order, 0 to not. Counter-intuitively, it is
           necessary to swap in order to see the byte order as it is on the
           wire (this may be a bug).
           stream a stream pointer to print to

   void libnet_diag_dump_pblock (libnet_t * l)
       [Diagnostic] Prints the contents of every pblock.

       Parameters:
           l pointer to a libnet context

   char* libnet_diag_dump_pblock_type (uint8_t type)
       [Diagnostic] Returns the canonical name of the pblock type.

       Parameters:
           type pblock type

       Returns:
           a string representing the pblock type type or 'unknown' for an
           unknown value

   struct libnet_ether_addr* libnet_get_hwaddr (libnet_t * l) [read]
       Returns the MAC address for the device libnet was initialized with. If
       libnet was initialized without a device the function will attempt to
       find one. If the function fails and returns NULL a call to
       libnet_geterror() will tell you why.

       Parameters:
           l pointer to a libnet context

       Returns:
           a pointer to the MAC address or NULL

   uint32_t libnet_get_ipaddr4 (libnet_t * l)
       Returns the IP address for the device libnet was initialized with. If
       libnet was initialized without a device (in raw socket mode) the
       function will attempt to find one. If the function fails and returns -1
       a call to libnet_geterrror() will tell you why.

       Parameters:
           l pointer to a libnet context

       Returns:
           a big endian IP address suitable for use in a libnet_build function
           or -1

   struct libnet_in6_addr libnet_get_ipaddr6 (libnet_t * l) [read]
       This function is not yet implemented under IPv6.

       Parameters:
           l pointer to a libnet context

       Returns:
           well, nothing yet

   uint32_t libnet_get_prand (int mod)
       Generates an unsigned psuedo-random value within the range specified by
       mod. LIBNET_PR2 0 - 1 LIBNET_PR8 0 - 255 LIBNET_PR16 0 - 32767
       LIBNET_PRu16 0 - 65535 LIBNET_PR32 0 - 2147483647 LIBNET_PRu32 0 -
       4294967295

       Parameters:
           mod one the of LIBNET_PR* constants

       Returns:
           1 on success, -1 on failure

   const char* libnet_getdevice (libnet_t * l)
       Returns the canonical name of the device used for packet injection.

       Parameters:
           l pointer to a libnet context

       Returns:
           the canonical name of the device used for packet injection. Note it
           can be NULL without being an error.

   char* libnet_geterror (libnet_t * l)
       Returns the last error set inside of the referenced libnet context.
       This function should be called anytime a function fails or an error
       condition is detected inside of libnet.

       Parameters:
           l pointer to a libnet context

       Returns:
           an error string or NULL if no error has occured

   int libnet_getfd (libnet_t * l)
       Returns the FILENO of the file descriptor used for packet injection.

       Parameters:
           l pointer to a libnet context

       Returns:
           the file number of the file descriptor used for packet injection

   uint32_t libnet_getgre_length (uint16_t fv)
       Parameters:
           fv see libnet_build_gre().

       Returns:
           size, see libnet_build_gre().

   uint32_t libnet_getpacket_size (libnet_t * l)
       Returns the sum of the size of all of the pblocks inside of l (this
       should be the resuling packet size).

       Parameters:
           l pointer to a libnet context

       Returns:
           the size of the packet in l

   uint8_t* libnet_getpbuf (libnet_t * l, libnet_ptag_t ptag)
       Returns the pblock buffer contents for the specified ptag; a subsequent
       call to libnet_getpbuf_size() should be made to determine the size of
       the buffer.

       Parameters:
           l pointer to a libnet context
           ptag the ptag reference number

       Returns:
           a pointer to the pblock buffer or NULL on error

   uint32_t libnet_getpbuf_size (libnet_t * l, libnet_ptag_t ptag)
       Returns the pblock buffer size for the specified ptag; a previous call
       to libnet_getpbuf() should be made to pull the actual buffer contents.

       Parameters:
           l pointer to a libnet context
           ptag the ptag reference number

       Returns:
           the size of the pblock buffer

   uint8_t* libnet_hex_aton (const char * s, int * len)
       Takes a colon separated hexidecimal address (from the command line) and
       returns a bytestring suitable for use in a libnet_build function. Note
       this function performs an implicit malloc and the return value should
       be freed after its use.

       Parameters:
           s the string to be parsed
           len the resulting size of the returned byte string

       Returns:
           a byte string or NULL on failure

   libnet_t* libnet_init (int injection_type, const char * device, char *
       err_buf)
       Creates the libnet environment. It initializes the library and returns
       a libnet context. If the injection_type is LIBNET_LINK or
       LIBNET_LINK_ADV, the function initializes the injection primitives for
       the link-layer interface enabling the application programmer to build
       packets starting at the data-link layer (which also provides more
       granular control over the IP layer). If libnet uses the link-layer and
       the device argument is non-NULL, the function attempts to use the
       specified network device for packet injection. This is either a
       canonical string that references the device (such as 'eth0' for a 100MB
       Ethernet card on Linux or 'fxp0' for a 100MB Ethernet card on OpenBSD)
       or the dots and decimals representation of the device's IP address
       (192.168.0.1). If device is NULL, libnet attempts to find a suitable
       device to use. If the injection_type is LIBNET_RAW4 or LIBNET_RAW4_ADV,
       the function initializes the injection primitives for the IPv4 raw
       socket interface. The final argument, err_buf, should be a buffer of
       size LIBNET_ERRBUF_SIZE and holds an error message if the function
       fails. This function requires root privileges to execute successfully.
       Upon success, the function returns a valid libnet context for use in
       later function calls; upon failure, the function returns NULL.

       Parameters:
           injection_type packet injection type (LIBNET_LINK, LIBNET_LINK_ADV,
           LIBNET_RAW4, LIBNET_RAW4_ADV, LIBNET_RAW6, LIBNET_RAW6_ADV)
           device the interface to use (NULL and libnet will choose one)
           err_buf will contain an error message on failure

       Returns:
           libnet context ready for use or NULL on error.

   uint32_t libnet_name2addr4 (libnet_t * l, char * host_name, uint8_t
       use_name)
       Takes a dotted decimal string or a canonical DNS name and returns a
       network byte ordered IPv4 address. This may incur a DNS lookup if mode
       is set to LIBNET_RESOLVE and host_name refers to a canonical DNS name.
       If mode is set to LIBNET_DONT_RESOLVE no DNS lookup will occur. The
       function can fail if DNS lookup fails or if mode is set to
       LIBNET_DONT_RESOLVE and host_name refers to a canonical DNS name.

       Parameters:
           l pointer to a libnet context
           host_name pointer to a string containing a presentation format host
           name
           use_name LIBNET_RESOLVE or LIBNET_DONT_RESOLVE

       Returns:
           network byte ordered IPv4 address or -1 (2^32 - 1) on error

   struct libnet_in6_addr libnet_name2addr6 (libnet_t * l, char * host_name,
       uint8_t use_name) [read]
       Takes a dotted decimal string or a canonical DNS name and returns a
       network byte ordered IPv6 address. This may incur a DNS lookup if mode
       is set to LIBNET_RESOLVE and host_name refers to a canonical DNS name.
       If mode is set to LIBNET_DONT_RESOLVE no DNS lookup will occur. The
       function can fail if DNS lookup fails or if mode is set to
       LIBNET_DONT_RESOLVE and host_name refers to a canonical DNS name.

       Parameters:
           l pointer to a libnet context
           host_name pointer to a string containing a presentation format host
           name
           use_name LIBNET_RESOLVE or LIBNET_DONT_RESOLVE

       Returns:
           network byte ordered IPv6 address structure

   int libnet_plist_chain_dump (libnet_plist_t * plist)
       Runs through the port list and prints the contents of the port list
       chain list to stdout.

       Parameters:
           plist previously created portlist

       Returns:
           1 on success, -1 on failure

   char* libnet_plist_chain_dump_string (libnet_plist_t * plist)
       Runs through the port list and prints the contents of the port list
       chain list to string. This function uses strdup and is not re-entrant.
       It also has a memory leak and should not really be used.

       Parameters:
           plist previously created portlist

       Returns:
           a printable string containing the port list contents on success
           NULL on error

   int libnet_plist_chain_free (libnet_plist_t * plist)
       Frees all memory associated with port list chain.

       Parameters:
           plist previously created portlist

       Returns:
           1 on success, -1 on failure

   int libnet_plist_chain_new (libnet_t * l, libnet_plist_t ** plist, char *
       token_list)
       Creates a new port list. Port list chains are useful for TCP and UDP-
       based applications that need to send packets to a range of ports
       (contiguous or otherwise). The port list chain, which token_list points
       to, should contain a series of int8_tacters from the following list:
       '0123456789,-' of the general format 'x - y, z', where 'xyz' are port
       numbers between 0 and 65,535. plist points to the front of the port
       list chain list for use in further libnet_plist_chain() functions. Upon
       success, the function returns 1. Upon failure, the function returns -1
       and libnet_geterror() can tell you why.

       Parameters:
           l pointer to a libnet context
           plist if successful, will refer to the portlist, if not, NULL
           token_list string containing the port list primitive

       Returns:
           1 on success, -1 on failure

   int libnet_plist_chain_next_pair (libnet_plist_t * plist, uint16_t * bport,
       uint16_t * eport)
       Returns the next port list chain pair from the port list chain plist.
       bport and eport contain the starting port number and ending port
       number, respectively. Upon success, the function returns 1 and fills in
       the port variables; however, if the list is empty, the function returns
       0 and sets both port variables to 0. Upon failure, the function returns
       -1.

       Parameters:
           plist previously created portlist
           bport will contain the beginning port number or 0
           eport will contain the ending port number or 0

       Returns:
           1 on success, 0 if empty, -1 on failure

   int libnet_seed_prand (libnet_t * l)
       Seeds the psuedo-random number generator.

       Parameters:
           l pointer to a libnet context

       Returns:
           1 on success, -1 on failure

   void libnet_stats (libnet_t * l, struct libnet_stats * ls)
       Fills in a libnet_stats structure with packet injection statistics
       (packets written, bytes written, packet sending errors).

       Parameters:
           l pointer to a libnet context
           ls pointer to a libnet statistics structure

   int libnet_toggle_checksum (libnet_t * l, libnet_ptag_t ptag, int mode)
       If a given protocol header is built with the checksum field set to '0',
       by default libnet will calculate the header checksum prior to
       injection. If the header is set to any other value, by default libnet
       will not calculate the header checksum. To over-ride this behavior, use
       libnet_toggle_checksum(). Switches auto-checksumming on or off for the
       specified ptag. If mode is set to LIBNET_ON, libnet will mark the
       specificed ptag to calculate a checksum for the ptag prior to
       injection. This assumes that the ptag refers to a protocol that has a
       checksum field. If mode is set to LIBNET_OFF, libnet will clear the
       checksum flag and no checksum will be computed prior to injection. This
       assumes that the programmer will assign a value (zero or otherwise) to
       the checksum field. Often times this is useful if a precomputed
       checksum or some other predefined value is going to be used. Note that
       when libnet is initialized with LIBNET_RAW4, the IPv4 header checksum
       will always be computed by the kernel prior to injection, regardless of
       what the programmer sets.

       Parameters:
           l pointer to a libnet context
           ptag the ptag reference number
           mode LIBNET_ON or LIBNET_OFF

       Returns:
           1 on success, -1 on failure

   const char* libnet_version (void)
       Returns the version of libnet.

       Returns:
           the libnet version

   int libnet_write (libnet_t * l)
       Writes a prebuilt packet to the network. The function assumes that l
       was previously initialized (via a call to libnet_init()) and that a
       previously constructed packet has been built inside this context (via
       one or more calls to the libnet_build* family of functions) and is
       ready to go. Depending on how libnet was initialized, the function will
       write the packet to the wire either via the raw or link layer
       interface. The function will also bump up the internal libnet stat
       counters which are retrievable via libnet_stats().

       Parameters:
           l pointer to a libnet context

       Returns:
           the number of bytes written, -1 on error

Author
       Generated automatically by Doxygen for libnet from the source code.



ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       +---------------+-----------------------+
       |ATTRIBUTE TYPE |   ATTRIBUTE VALUE     |
       +---------------+-----------------------+
       |Availability   | system/library/libnet |
       +---------------+-----------------------+
       |Stability      | Uncommitted           |
       +---------------+-----------------------+
NOTES
       This software was built from source available at
       https://github.com/oracle/solaris-userland.  The original community
       source was downloaded from
       https://download.sourceforge.net/sourceforge/libnet-
       dev/libnet-1.1.5.tar.gz

       Further information about this software can be found on the open source
       community website at https://sourceforge.net/projects/libnet-dev/.



Version 1.1                       8 Nov 2010             libnet-functions.h(3)