socket.h: Introduce API osmo_sockaddr_netmask_to_prefixlen()
Implementation is imported from osmo-ggsn.git
97f60e3dca581797007524e0006ca9fafad59713 in46a_netmasklen() and adapter
to work with an osmo_sockaddr.
This will be used by osmocom-bb's "modem" app.
Change-Id: I75e75e251c6776801fffdde745aebedf21c68799
diff --git a/tests/socket/socket_test.c b/tests/socket/socket_test.c
index d090fba..b3b9584 100644
--- a/tests/socket/socket_test.c
+++ b/tests/socket/socket_test.c
@@ -385,6 +385,63 @@
OSMO_ASSERT(!strncmp("[2003:1234:5678:90ab:cdef:1234:4321:4321]:23420", result, sizeof(buf)));
}
+static void test_osa_netmask_prefixlen(void)
+{
+ struct osmo_sockaddr ipv4;
+ struct osmo_sockaddr ipv6;
+ int rc;
+
+ ipv4.u.sin = (struct sockaddr_in){
+ .sin_family = AF_INET,
+ };
+
+ ipv4.u.sin.sin_addr.s_addr = inet_addr("0.0.0.0");
+ rc = osmo_sockaddr_netmask_to_prefixlen(&ipv4);
+ OSMO_ASSERT(rc == 0);
+
+ ipv4.u.sin.sin_addr.s_addr = inet_addr("255.0.0.0");
+ rc = osmo_sockaddr_netmask_to_prefixlen(&ipv4);
+ OSMO_ASSERT(rc == 8);
+
+ ipv4.u.sin.sin_addr.s_addr = inet_addr("255.255.0.0");
+ rc = osmo_sockaddr_netmask_to_prefixlen(&ipv4);
+ OSMO_ASSERT(rc == 16);
+
+ ipv4.u.sin.sin_addr.s_addr = inet_addr("255.255.255.0");
+ rc = osmo_sockaddr_netmask_to_prefixlen(&ipv4);
+ OSMO_ASSERT(rc == 24);
+
+ ipv4.u.sin.sin_addr.s_addr = inet_addr("255.255.255.255");
+ rc = osmo_sockaddr_netmask_to_prefixlen(&ipv4);
+ OSMO_ASSERT(rc == 32);
+
+ ipv4.u.sin.sin_addr.s_addr = inet_addr("0.255.0.0");
+ rc = osmo_sockaddr_netmask_to_prefixlen(&ipv4);
+ /* FIXME: This shows the implementation is not that robust checking validity of input netmask: */
+ OSMO_ASSERT(rc == 8);
+
+ ipv6.u.sin6 = (struct sockaddr_in6){
+ .sin6_family = AF_INET6,
+ };
+
+ inet_pton(AF_INET6, "fe::", &ipv6.u.sin6.sin6_addr);
+ rc = osmo_sockaddr_netmask_to_prefixlen(&ipv6);
+ OSMO_ASSERT(rc == 7);
+
+ inet_pton(AF_INET6, "ff::", &ipv6.u.sin6.sin6_addr);
+ rc = osmo_sockaddr_netmask_to_prefixlen(&ipv6);
+ OSMO_ASSERT(rc == 8);
+
+ inet_pton(AF_INET6, "ff:ff::", &ipv6.u.sin6.sin6_addr);
+ rc = osmo_sockaddr_netmask_to_prefixlen(&ipv6);
+ OSMO_ASSERT(rc == 16);
+
+ inet_pton(AF_INET6, "ff:ff::ff", &ipv6.u.sin6.sin6_addr);
+ rc = osmo_sockaddr_netmask_to_prefixlen(&ipv6);
+ /* FIXME: This shows the implementation is not that robust checking validity of input netmask: */
+ OSMO_ASSERT(rc == 24);
+}
+
const struct log_info_cat default_categories[] = {
};
@@ -407,6 +464,7 @@
test_get_ip_and_port();
test_sockinit_osa();
test_osa_str();
+ test_osa_netmask_prefixlen();
return EXIT_SUCCESS;
}