IPV6_MULTICAST_HOPS(2const)                        IPV6_MULTICAST_HOPS(2const)

NAME
       IPV6_MULTICAST_HOPS - multicast hop limit

LIBRARY
       Standard C library (libc, -lc)

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

       int setsockopt(int sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
                      const int *val, sizeof(int));
       int getsockopt(int sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
                      int *val, sizeof(int));

DESCRIPTION
       Set the multicast hop limit for the socket.

       A value of -1 means use the route default; otherwise it should be in
       the range [0, 255].

ERRORS
       See IPPROTO_IPV6(2const).  See setsockopt(2).  See ipv6(7).

HISTORY
       IPV6_MULTICAST_HOPS
              POSIX.1-2001.

SEE ALSO
       IPPROTO_IPV6(2const), setsockopt(2), ipv6(7)

Linux man-pages 6.17              2026-01-05       IPV6_MULTICAST_HOPS(2const)