From 801bd9e859d7f3f127617172910786929776472b Mon Sep 17 00:00:00 2001
From: Tom Gundersen <teg@jklm.no>
Date: Tue, 28 Jan 2014 20:00:47 +0100
Subject: [PATCH] net-util: verify the address family

Error out if the address family is already set to something incompatible with the
address being parsed.
---
 src/network/networkd-address.c |  4 ++++
 src/network/networkd-network.c |  6 ------
 src/network/networkd-route.c   |  8 ++++++--
 src/network/networkd.h         |  1 -
 src/shared/net-util.c          | 20 ++++++++++++++------
 5 files changed, 24 insertions(+), 15 deletions(-)

diff --git a/src/network/networkd-address.c b/src/network/networkd-address.c
index 3f787948f9..de5566dfdb 100644
--- a/src/network/networkd-address.c
+++ b/src/network/networkd-address.c
@@ -46,6 +46,8 @@ int address_new_static(Network *network, unsigned section, Address **ret) {
         if (!address)
                 return -ENOMEM;
 
+        address->family = AF_UNSPEC;
+
         address->network = network;
 
         LIST_PREPEND(static_addresses, network->static_addresses, address);
@@ -68,6 +70,8 @@ int address_new_dynamic(Address **ret) {
         if (!address)
                 return -ENOMEM;
 
+        address->family = AF_UNSPEC;
+
         *ret = address;
         address = NULL;
 
diff --git a/src/network/networkd-network.c b/src/network/networkd-network.c
index 2a720349a0..94138cd558 100644
--- a/src/network/networkd-network.c
+++ b/src/network/networkd-network.c
@@ -84,12 +84,6 @@ static int network_load_one(Manager *manager, const char *filename) {
                                     "Ignoring", filename);
                         return 0;
                 }
-
-                if (route->dst_family && route->family != route->dst_family) {
-                        log_warning("Route section with conflicting Gateway and Destination address "
-                                    "family configured in %s. Ignoring", filename);
-                        return 0;
-                }
         }
 
         LIST_FOREACH(static_addresses, address, network->static_addresses) {
diff --git a/src/network/networkd-route.c b/src/network/networkd-route.c
index 83dad655db..29ee1045da 100644
--- a/src/network/networkd-route.c
+++ b/src/network/networkd-route.c
@@ -47,6 +47,8 @@ int route_new_static(Network *network, unsigned section, Route **ret) {
         if (!route)
                 return -ENOMEM;
 
+        route->family = AF_UNSPEC;
+
         route->network = network;
 
         LIST_PREPEND(static_routes, network->static_routes, route);
@@ -69,6 +71,8 @@ int route_new_dynamic(Route **ret) {
         if (!route)
                 return -ENOMEM;
 
+        route->family = AF_UNSPEC;
+
         *ret = route;
         route = NULL;
 
@@ -231,7 +235,7 @@ int config_parse_destination(const char *unit,
                         return log_oom();
         }
 
-        r = net_parse_inaddr(address, &n->dst_family, &n->dst_addr);
+        r = net_parse_inaddr(address, &n->family, &n->dst_addr);
         if (r < 0) {
                 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
                            "Destination is invalid, ignoring assignment: %s", address);
@@ -252,7 +256,7 @@ int config_parse_destination(const char *unit,
 
                 n->dst_prefixlen = (unsigned char) i;
         } else {
-                switch (n->dst_family) {
+                switch (n->family) {
                         case AF_INET:
                                 n->dst_prefixlen = 32;
                                 break;
diff --git a/src/network/networkd.h b/src/network/networkd.h
index 968edf6a70..f174abbf59 100644
--- a/src/network/networkd.h
+++ b/src/network/networkd.h
@@ -138,7 +138,6 @@ struct Route {
         uint64_t section;
 
         unsigned char family;
-        unsigned char dst_family;
         unsigned char dst_prefixlen;
 
         union {
diff --git a/src/shared/net-util.c b/src/shared/net-util.c
index 8f8cfc9fdb..887dae5125 100644
--- a/src/shared/net-util.c
+++ b/src/shared/net-util.c
@@ -192,16 +192,24 @@ int net_parse_inaddr(const char *address, unsigned char *family, void *dst) {
 
         /* IPv4 */
         r = inet_pton(AF_INET, address, dst);
-        if (r > 0)
-                *family = AF_INET; /* successfully parsed IPv4 address */
-        else  if (r < 0)
+        if (r > 0) {
+                /* succsefully parsed IPv4 address */
+                if (*family == AF_UNSPEC)
+                        *family = AF_INET;
+                else if (*family != AF_INET)
+                        return -EINVAL;
+        } else  if (r < 0)
                 return -errno;
         else {
                 /* not an IPv4 address, so let's try IPv6 */
                 r = inet_pton(AF_INET6, address, dst);
-                if (r > 0)
-                        *family = AF_INET6; /* successfully parsed IPv6 address */
-                else if (r < 0)
+                if (r > 0) {
+                        /* successfully parsed IPv6 address */
+                        if (*family == AF_UNSPEC)
+                                *family = AF_INET6;
+                        else if (*family != AF_INET6)
+                                return -EINVAL;
+                } else if (r < 0)
                         return -errno;
                 else
                         return -EINVAL;