system-linux: parse ipv6 specific tunnel settings as nested data json

object

diff --git a/system-linux.c b/system-linux.c
index 483a98dbbf9b374755b7656a2a04764a9a7c4f3e..f38aaed584ead695df6ca139174a1585690db552 100644 (file)
--- a/system-linux.c
+++ b/system-linux.c
@@ -2262,6 +2262,120 @@ static int tunnel_ioctl(const char *name, int cmd, void *p)
        return ioctl(sock_ioctl, cmd, &ifr);
 }
 
+#ifdef IFLA_IPTUN_MAX
+static int system_add_ip6_tunnel(const char *name, const unsigned int link,
+                                struct blob_attr **tb)
+{
+       struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
+                               NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
+       struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
+       struct blob_attr *cur;
+       int ret = 0, ttl = 0;
+
+       if (!nlm)
+               return -1;
+
+       nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
+       nla_put_string(nlm, IFLA_IFNAME, name);
+
+       if (link)
+               nla_put_u32(nlm, IFLA_LINK, link);
+
+       struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
+       if (!linkinfo) {
+               ret = -ENOMEM;
+               goto failure;
+       }
+
+       nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
+       struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
+       if (!infodata) {
+               ret = -ENOMEM;
+               goto failure;
+       }
+
+       if (link)
+               nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
+
+       if ((cur = tb[TUNNEL_ATTR_TTL]))
+               ttl = blobmsg_get_u32(cur);
+
+       nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
+       nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
+       nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
+
+       struct in6_addr in6buf;
+       if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
+               if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
+                       ret = -EINVAL;
+                       goto failure;
+               }
+               nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
+       }
+
+       if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
+               if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
+                       ret = -EINVAL;
+                       goto failure;
+               }
+               nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
+       }
+
+#ifdef IFLA_IPTUN_FMR_MAX
+       if ((cur = tb[TUNNEL_ATTR_FMRS])) {
+               struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
+
+               struct blob_attr *fmr;
+               unsigned rem, fmrcnt = 0;
+               blobmsg_for_each_attr(fmr, cur, rem) {
+                       if (blobmsg_type(fmr) != BLOBMSG_TYPE_STRING)
+                               continue;
+
+                       unsigned ip4len, ip6len, ealen, offset = 6;
+                       char ip6buf[48];
+                       char ip4buf[16];
+
+                       if (sscanf(blobmsg_get_string(fmr), "%47[^/]/%u,%15[^/]/%u,%u,%u",
+                                       ip6buf, &ip6len, ip4buf, &ip4len, &ealen, &offset) < 5) {
+                               ret = -EINVAL;
+                               goto failure;
+                       }
+
+                       struct in6_addr ip6prefix;
+                       struct in_addr ip4prefix;
+                       if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 ||
+                                       inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) {
+                               ret = -EINVAL;
+                               goto failure;
+                       }
+
+                       struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
+
+                       nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
+                       nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
+                       nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
+                       nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
+                       nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
+                       nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
+
+                       nla_nest_end(nlm, rule);
+               }
+
+               nla_nest_end(nlm, fmrs);
+       }
+#endif
+
+       nla_nest_end(nlm, infodata);
+       nla_nest_end(nlm, linkinfo);
+
+       return system_rtnl_call(nlm);
+
+failure:
+       nlmsg_free(nlm);
+       return ret;
+}
+#endif
+
 #ifdef IFLA_IPTUN_MAX
 #define IP6_FLOWINFO_TCLASS    htonl(0x0FF00000)
 static int system_add_gre_tunnel(const char *name, const char *kind,
@@ -2916,107 +3030,7 @@ int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
                return system_add_sit_tunnel(name, link, tb);
 #ifdef IFLA_IPTUN_MAX
        else if (!strcmp(str, "ipip6")) {
-               struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
-                               NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
-               struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
-               int ret = 0;
-
-               if (!nlm)
-                       return -1;
-
-               nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
-               nla_put_string(nlm, IFLA_IFNAME, name);
-
-               if (link)
-                       nla_put_u32(nlm, IFLA_LINK, link);
-
-               struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
-               if (!linkinfo) {
-                       ret = -ENOMEM;
-                       goto failure;
-               }
-               nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
-               struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
-               if (!infodata) {
-                       ret = -ENOMEM;
-                       goto failure;
-               }
-
-               if (link)
-                       nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
-
-               nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
-               nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
-               nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
-
-               struct in6_addr in6buf;
-               if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
-                       if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
-                               ret = -EINVAL;
-                               goto failure;
-                       }
-                       nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
-               }
-
-               if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
-                       if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
-                               ret = -EINVAL;
-                               goto failure;
-                       }
-                       nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
-               }
-
-#ifdef IFLA_IPTUN_FMR_MAX
-               if ((cur = tb[TUNNEL_ATTR_FMRS])) {
-                       struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
-
-                       struct blob_attr *fmr;
-                       unsigned rem, fmrcnt = 0;
-                       blobmsg_for_each_attr(fmr, cur, rem) {
-                               if (blobmsg_type(fmr) != BLOBMSG_TYPE_STRING)
-                                       continue;
-
-                               unsigned ip4len, ip6len, ealen, offset = 6;
-                               char ip6buf[48];
-                               char ip4buf[16];
-
-                               if (sscanf(blobmsg_get_string(fmr), "%47[^/]/%u,%15[^/]/%u,%u,%u",
-                                               ip6buf, &ip6len, ip4buf, &ip4len, &ealen, &offset) < 5) {
-                                       ret = -EINVAL;
-                                       goto failure;
-                               }
-
-                               struct in6_addr ip6prefix;
-                               struct in_addr ip4prefix;
-                               if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 ||
-                                               inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) {
-                                       ret = -EINVAL;
-                                       goto failure;
-                               }
-
-                               struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
-
-                               nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
-                               nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
-                               nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
-                               nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
-                               nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
-                               nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
-
-                               nla_nest_end(nlm, rule);
-                       }
-
-                       nla_nest_end(nlm, fmrs);
-               }
-#endif
-
-               nla_nest_end(nlm, infodata);
-               nla_nest_end(nlm, linkinfo);
-
-               return system_rtnl_call(nlm);
-failure:
-               nlmsg_free(nlm);
-               return ret;
+               return system_add_ip6_tunnel(name, link, tb);
        } else if (!strcmp(str, "greip")) {
                return system_add_gre_tunnel(name, "gre", link, tb, false);
        } else if (!strcmp(str, "gretapip"))  {