This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/gerrit-log@lists.osmocom.org/.
laforge gerrit-no-reply at lists.osmocom.orglaforge has uploaded this change for review. ( https://gerrit.osmocom.org/c/libosmocore/+/17418 ) Change subject: socket: Add osmo_sock_mcast_iface_set() to bind multicast to device ...................................................................... socket: Add osmo_sock_mcast_iface_set() to bind multicast to device Change-Id: Ib52d22710020b56965aefcef09bde8247ace4a9c Related: OS#2966 --- M src/socket.c 1 file changed, 22 insertions(+), 0 deletions(-) git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/18/17418/1 diff --git a/src/socket.c b/src/socket.c index 9b1d30e..8c267f5 100644 --- a/src/socket.c +++ b/src/socket.c @@ -41,6 +41,7 @@ #include <sys/socket.h> #include <sys/types.h> #include <sys/un.h> +#include <net/if.h> #include <netinet/in.h> #include <arpa/inet.h> @@ -1194,6 +1195,27 @@ } } +/*! Set the TTL of outbound multicast packets + * \param[in] fd file descriptor of related socket + * \param[in] ifname name of network interface to user for multicast + * \returns 0 on success; negative otherwise */ +int osmo_sock_mcast_iface_set(int fd, const char *ifname) +{ + unsigned int ifindex; + struct ip_mreqn mr; + + /* first, resolve interface name to ifindex */ + ifindex = if_nametoindex(ifname); + if (ifindex == 0) + return -errno; + + /* next, configure kernel to use that ifindex for this sockets multicast traffic */ + memset(&mr, 0, sizeof(mr)); + mr.imr_ifindex = ifindex; + return setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, &mr, sizeof(mr)); +} + + /*! Enable/disable receiving all multicast packets, even for non-subscribed groups * \param[in] fd file descriptor of related socket * \param[in] enable Enable or Disable receiving of all packets -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/17418 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: Ib52d22710020b56965aefcef09bde8247ace4a9c Gerrit-Change-Number: 17418 Gerrit-PatchSet: 1 Gerrit-Owner: laforge <laforge at osmocom.org> Gerrit-MessageType: newchange -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20200308/57ceb061/attachment.htm>