osmo_sock_init2: improve support for AF_UNSPEC
osmo_sock_init2 abstract two calls of getaddrinfo into one.
While there aren't problems with AF_INET or AF_INET6. When using
AF_UNSPEC there are corner cases when this fails. E.g. calling
local_host with "" and remote_host with an IPv6 only address results in
setting up a local socket with AF_INET while trying to connect from there towards
AF_INET6 will most likely fail.
To prevent such cases with AF_UNSPEC, search prio calling any syscalls if local and remote site
supports AF_INET or AF_INET6. In case both supported, prefer AF_INET6
Change-Id: I397c633931fd00d4f083955a3c49a40fb002d766
diff --git a/tests/socket/socket_test.ok b/tests/socket/socket_test.ok
index 4b24fbc..4265be8 100644
--- a/tests/socket/socket_test.ok
+++ b/tests/socket/socket_test.ok
@@ -5,3 +5,7 @@
Checking osmo_sock_init2() for OSMO_SOCK_F_NONBLOCK
Checking osmo_sock_init2() for invalid flags
Checking osmo_sock_init2() for combined BIND + CONNECT
+Checking osmo_sock_init2(AF_UNSPEC) must fail on mixed IPv4 & IPv6
+Checking osmo_sock_init2(AF_UNSPEC) must fail on mixed IPv6 & IPv4
+Checking osmo_sock_init2(AF_UNSPEC) BIND + CONNECT on IPv4
+Checking osmo_sock_init2(AF_UNSPEC) BIND + CONNECT on IPv6