IP_RECVORIGDSTADDR(2const)                          IP_RECVORIGDSTADDR(2const)

NAME
       IP_RECVORIGDSTADDR - receive IP_ORIGDSTADDR 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_RECVORIGDSTADDR,
                      const int *enable, sizeof(int));

DESCRIPTION
       This boolean option enables the IP_ORIGDSTADDR ancillary message in
       recvmsg(2), in which the kernel returns the original destination
       address of the datagram being received.

       The ancillary message contains a sockaddr_in(2type) structure.

       Not supported for SOCK_STREAM sockets.

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

STANDARDS
       Linux.

HISTORY
       Linux 2.6.29.

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

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