From 3d42c9150e65799fa61778a1bfc1dda060dff847 Mon Sep 17 00:00:00 2001 From: Steven Barth Date: Wed, 21 May 2014 21:25:50 +0200 Subject: [PATCH] Rewrite ipip6-tunnel setup to use netlink and add support for FMRs Signed-off-by: Steven Barth --- system-linux.c | 90 +++++++++++++++++++++++++++++++++++++++++--------- system.c | 1 + system.h | 1 + 3 files changed, 77 insertions(+), 15 deletions(-) diff --git a/system-linux.c b/system-linux.c index 7a194ca..06226ef 100644 --- a/system-linux.c +++ b/system-linux.c @@ -1672,24 +1672,84 @@ int system_add_ip_tunnel(const char *name, struct blob_attr *attr) } #endif } else if (!strcmp(str, "ipip6")) { - struct ip6_tnl_parm p = { - .link = link, - .proto = IPPROTO_IPIP, - .hop_limit = (ttl) ? ttl : 64, - .encap_limit = 4, - }; + struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK, + NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE); - if ((cur = tb[TUNNEL_ATTR_LOCAL]) && - inet_pton(AF_INET6, blobmsg_data(cur), &p.laddr) < 1) - return -EINVAL; + struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC }; + nlmsg_append(nlm, &ifi, sizeof(ifi), 0); + nla_put_string(nlm, IFLA_IFNAME, name); - if ((cur = tb[TUNNEL_ATTR_REMOTE]) && - inet_pton(AF_INET6, blobmsg_data(cur), &p.raddr) < 1) - return -EINVAL; + if (link) + nla_put_u32(nlm, IFLA_LINK, link); - strncpy(p.name, name, sizeof(p.name)); - if (tunnel_ioctl("ip6tnl0", SIOCADDTUNNEL, &p) < 0) - return -1; + struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO); + nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl"); + struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA); + + 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) + return -EINVAL; + 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) + return -EINVAL; + 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) + return -EINVAL; + + struct in6_addr ip6prefix; + struct in_addr ip4prefix; + if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 || + inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) + return -EINVAL; + + 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); } else return -EINVAL; diff --git a/system.c b/system.c index 3dd90b4..8e1fc31 100644 --- a/system.c +++ b/system.c @@ -25,6 +25,7 @@ static const struct blobmsg_policy tunnel_attrs[__TUNNEL_ATTR_MAX] = { [TUNNEL_ATTR_6RD_PREFIX] = {.name = "6rd-prefix", .type = BLOBMSG_TYPE_STRING }, [TUNNEL_ATTR_6RD_RELAY_PREFIX] = { .name = "6rd-relay-prefix", .type = BLOBMSG_TYPE_STRING }, [TUNNEL_ATTR_LINK] = { .name = "link", .type = BLOBMSG_TYPE_STRING }, + [TUNNEL_ATTR_FMRS] = { .name = "fmrs", .type = BLOBMSG_TYPE_ARRAY }, }; const struct uci_blob_param_list tunnel_attr_list = { diff --git a/system.h b/system.h index 1ad861a..a8f12ac 100644 --- a/system.h +++ b/system.h @@ -31,6 +31,7 @@ enum tunnel_param { TUNNEL_ATTR_6RD_PREFIX, TUNNEL_ATTR_6RD_RELAY_PREFIX, TUNNEL_ATTR_LINK, + TUNNEL_ATTR_FMRS, __TUNNEL_ATTR_MAX }; -- 2.25.1