socket: Introduce API osmo_sock_init2_multiaddr()

This API will be used by libosmo-netif's osmo_stream for SCTP sockets,
which in turn will be used by libosmo-sccp to support multi-homed
connections.

Related: OS#3608
Change-Id: Ic8681d9e093216c99c6bca4be81c31ef83688ed1

1 files changed, 7 insertions, 0 deletions

diff --git a/include/osmocom/core/socket.h b/include/osmocom/core/socket.h
index 37b1eaef..e26ca0d3 100644
--- a/include/osmocom/core/socket.h
+++ b/include/osmocom/core/socket.h
@@ -36,6 +36,9 @@ struct osmo_fd;
 /*! use SO_REUSEADDR on UDP ports (required for multicast) */
 #define OSMO_SOCK_F_UDP_REUSEADDR (1 << 5)
 
+/*! maximum number of local or remote addresses supported by an osmo_sock instance */
+#define OSMO_SOCK_MAX_ADDRS 32
+
 int osmo_sock_init(uint16_t family, uint16_t type, uint8_t proto,
 		   const char *host, uint16_t port, unsigned int flags);
 
@@ -43,6 +46,10 @@ int osmo_sock_init2(uint16_t family, uint16_t type, uint8_t proto,
 		   const char *local_host, uint16_t local_port,
 		   const char *remote_host, uint16_t remote_port, unsigned int flags);
 
+int osmo_sock_init2_multiaddr(uint16_t family, uint16_t type, uint8_t proto,
+		   const char **local_hosts, size_t local_hosts_cnt, uint16_t local_port,
+		   const char **remote_hosts, size_t remote_hosts_cnt, uint16_t remote_port, unsigned int flags);
+
 int osmo_sock_init_ofd(struct osmo_fd *ofd, int family, int type, int proto,
 			const char *host, uint16_t port, unsigned int flags);