socket: add function osmo_sock_local_ip() to query local ip
In some cases it is required to know the ip-address of the interface
through that a given remote IP-Address can be reached.
Add function osmo_sock_local_ip() to determine the local ip-address
for a given remote ip-address
Change-Id: I2988cc52b196fc8476703d1287e24cb4a48491c2
diff --git a/include/osmocom/core/socket.h b/include/osmocom/core/socket.h
index ebfcab3..47d9f30 100644
--- a/include/osmocom/core/socket.h
+++ b/include/osmocom/core/socket.h
@@ -57,4 +57,6 @@
int osmo_sock_mcast_all_set(int fd, bool enable);
int osmo_sock_mcast_subscribe(int fd, const char *grp_addr);
+int osmo_sock_local_ip(char *local_ip, const char *remote_ip);
+
/*! @} */