IP_RECVOPTS(2const)                                        IP_RECVOPTS(2const)

NAME
       IP_RECVOPTS - receive all incoming IP options in control message

LIBRARY
       Standard C library (libc, -lc)

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

HISTORY
       Linux 2.2.

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

Linux man-pages 6.17              2025-11-25               IP_RECVOPTS(2const)