NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | ATTRIBUTES | SUMMARY OF TRUSTED SOLARIS CHANGES | SEE ALSO | NOTES
#include <sys/types.h> #include <sys/socket.h>int listen(int s, int backlog);
To accept connections, a socket is first created with socket(3N), a backlog for incoming connections is specified with listen() and then the connections are accepted with accept(3N). The listen() call applies only to sockets of type SOCK_STREAM or SOCK_SEQPACKET.
The backlog parameter defines the maximum length the queue of pending connections may grow to.
If a connection request arrives with the queue full, the client will receive an error with an indication of ECONNREFUSED for AF_UNIX sockets. If the underlying protocol supports retransmission, the connection request may be ignored so that retries may succeed. For AF_INET sockets, the tcp will retry the connection. If the backlog is not cleared by the time the tcp times out, the connect will fail with ETIMEDOUT.
The call fails if:
The argument s is not a valid file descriptor.
The argument s is not a socket.
The socket is not of a type that supports the operation listen().
See attributes(5) for descriptions of the following attributes:
ATTRIBUTE TYPE | ATTRIBUTE VALUE |
---|---|
MT-Level | Safe |
If the calling process possesses thePRIV_NET_MAC_READ
privilege, the endpoint will bind to an MLP; otherwise, it will bind to an SLP.
There is currently no backlog limit.
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | ATTRIBUTES | SUMMARY OF TRUSTED SOLARIS CHANGES | SEE ALSO | NOTES