IP_RECVOPTS(2const) — Linux manual page

IP_RECVOPTS(2const)                                   IP_RECVOPTS(2const)

NAME         top

       IP_RECVOPTS - receive all incoming IP options in control message

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #include <netinet/in.h>  /* Definition of IP* constants */
       #include <sys/socket.h>

       int setsockopt(int sockfd, IPPROTO_IP, IP_RECVOPTS,
                      const int *enable, sizeof(int));

DESCRIPTION         top

       Pass all incoming IP options to the user in a IP_OPTIONS(2const)
       control message.

       The routing header and other options are already filled in for the
       local host.

       Not supported for SOCK_STREAM sockets.

ERRORS         top

       See IPPROTO_IP(2const).  See setsockopt(2).  See ip(7).

HISTORY         top

       Linux 2.2.

SEE ALSO         top

       IPPROTO_IP(2const), setsockopt(2), ip(7)

COLOPHON         top

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Linux man-pages 6.18            2025-11-25            IP_RECVOPTS(2const)

Pages that refer to this page: IPPROTO_IP(2const),  IP_RETOPTS(2const)

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