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-rw-r--r--include/osmocom/core/socket.h2
-rw-r--r--src/socket.c6
2 files changed, 5 insertions, 3 deletions
diff --git a/include/osmocom/core/socket.h b/include/osmocom/core/socket.h
index 20515b99..f23a2436 100644
--- a/include/osmocom/core/socket.h
+++ b/include/osmocom/core/socket.h
@@ -24,6 +24,8 @@ struct osmo_fd;
#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)
+/*! use SO_REUSEADDR on UDP ports (required for multicast) */
+#define OSMO_SOCK_F_UDP_REUSEADDR (1 << 5)
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 210dbf96..7e7f6d96 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -209,7 +209,7 @@ int osmo_sock_init2(uint16_t family, uint16_t type, uint8_t proto,
if (sfd < 0)
continue;
- if (proto != IPPROTO_UDP) {
+ if (proto != IPPROTO_UDP || flags & OSMO_SOCK_F_UDP_REUSEADDR) {
rc = setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR,
&on, sizeof(on));
if (rc < 0) {
@@ -349,7 +349,7 @@ int osmo_sock_init(uint16_t family, uint16_t type, uint8_t proto,
continue;
}
} else {
- if (proto != IPPROTO_UDP) {
+ if (proto != IPPROTO_UDP || flags & OSMO_SOCK_F_UDP_REUSEADDR) {
rc = setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR,
&on, sizeof(on));
if (rc < 0) {
@@ -379,7 +379,7 @@ int osmo_sock_init(uint16_t family, uint16_t type, uint8_t proto,
return -ENODEV;
}
- if (proto != IPPROTO_UDP) {
+ if (proto != IPPROTO_UDP || flags & OSMO_SOCK_F_UDP_REUSEADDR) {
rc = setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
if (rc < 0) {
LOGP(DLGLOBAL, LOGL_ERROR,