diff options
| -rw-r--r-- | include/osmocom/core/socket.h | 2 | ||||
| -rw-r--r-- | src/socket.c | 10 |
2 files changed, 12 insertions, 0 deletions
diff --git a/include/osmocom/core/socket.h b/include/osmocom/core/socket.h index 695e1d7e..ebfcab3a 100644 --- a/include/osmocom/core/socket.h +++ b/include/osmocom/core/socket.h @@ -22,6 +22,8 @@ struct osmo_fd; #define OSMO_SOCK_F_NONBLOCK (1 << 2) /*! disable multiast loop (IP_MULTICAST_LOOP) */ #define OSMO_SOCK_F_NO_MCAST_LOOP (1 << 3) +/*! disable receiving all multiast even for non-subscribed groups */ +#define OSMO_SOCK_F_NO_MCAST_ALL (1 << 4) int osmo_sock_init(uint16_t family, uint16_t type, uint8_t proto, const char *host, uint16_t port, unsigned int flags); diff --git a/src/socket.c b/src/socket.c index c7d081c3..ca50b6f4 100644 --- a/src/socket.c +++ b/src/socket.c @@ -132,6 +132,16 @@ static int osmo_sock_init_tail(int fd, uint16_t type, unsigned int flags) } } + if (flags & OSMO_SOCK_F_NO_MCAST_ALL) { + rc = osmo_sock_mcast_all_set(fd, false); + if (rc < 0) { + LOGP(DLGLOBAL, LOGL_ERROR, "unable to disable receive of all multicast: %s\n", + strerror(errno)); + /* do not abort here, as this is just an + * optional additional optimization that only + * exists on Linux only */ + } + } return 0; } |