diff options
author | Luka Perkov <luka@openwrt.org> | 2015-04-11 10:28:14 +0000 |
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committer | Luka Perkov <luka@openwrt.org> | 2015-04-11 10:28:14 +0000 |
commit | 88655056656fdbd9d021d8de11a6077fb49428da (patch) | |
tree | d3b641c3c5876ee5e79c67034a95a8fd532a4077 /target/linux/generic/patches-3.14/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch | |
parent | b66b0ae6323fea7dedd400785c556a39a30cdf4f (diff) | |
download | master-31e0f0ae-88655056656fdbd9d021d8de11a6077fb49428da.tar.gz master-31e0f0ae-88655056656fdbd9d021d8de11a6077fb49428da.tar.bz2 master-31e0f0ae-88655056656fdbd9d021d8de11a6077fb49428da.zip |
generic: drop 3.14
Signed-off-by: Luka Perkov <luka@openwrt.org>
SVN-Revision: 45375
Diffstat (limited to 'target/linux/generic/patches-3.14/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch')
-rw-r--r-- | target/linux/generic/patches-3.14/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch | 481 |
1 files changed, 0 insertions, 481 deletions
diff --git a/target/linux/generic/patches-3.14/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch b/target/linux/generic/patches-3.14/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch deleted file mode 100644 index c7126dad25..0000000000 --- a/target/linux/generic/patches-3.14/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch +++ /dev/null @@ -1,481 +0,0 @@ -From 775d6fe74d1eaec2ba387535b068dde2dc89de9e Mon Sep 17 00:00:00 2001 -From: Steven Barth <steven@midlink.org> -Date: Thu, 22 May 2014 09:49:05 +0200 -Subject: [PATCH] Add support for MAP-E FMRs (mesh mode) - -MAP-E FMRs (draft-ietf-softwire-map-10) are rules for IPv4-communication -between MAP CEs (mesh mode) without the need to forward such data to a -border relay. This is similar to how 6rd works but for IPv4 over IPv6. - -Signed-off-by: Steven Barth <cyrus@openwrt.org> ---- - include/net/ip6_tunnel.h | 13 ++ - include/uapi/linux/if_tunnel.h | 13 ++ - net/ipv6/ip6_tunnel.c | 276 +++++++++++++++++++++++++++++++++++++++-- - 3 files changed, 291 insertions(+), 11 deletions(-) - ---- a/include/net/ip6_tunnel.h -+++ b/include/net/ip6_tunnel.h -@@ -15,6 +15,18 @@ - /* determine capability on a per-packet basis */ - #define IP6_TNL_F_CAP_PER_PACKET 0x40000 - -+/* IPv6 tunnel FMR */ -+struct __ip6_tnl_fmr { -+ struct __ip6_tnl_fmr *next; /* next fmr in list */ -+ struct in6_addr ip6_prefix; -+ struct in_addr ip4_prefix; -+ -+ __u8 ip6_prefix_len; -+ __u8 ip4_prefix_len; -+ __u8 ea_len; -+ __u8 offset; -+}; -+ - struct __ip6_tnl_parm { - char name[IFNAMSIZ]; /* name of tunnel device */ - int link; /* ifindex of underlying L2 interface */ -@@ -25,6 +37,7 @@ struct __ip6_tnl_parm { - __u32 flags; /* tunnel flags */ - struct in6_addr laddr; /* local tunnel end-point address */ - struct in6_addr raddr; /* remote tunnel end-point address */ -+ struct __ip6_tnl_fmr *fmrs; /* FMRs */ - - __be16 i_flags; - __be16 o_flags; ---- a/include/uapi/linux/if_tunnel.h -+++ b/include/uapi/linux/if_tunnel.h -@@ -53,10 +53,23 @@ enum { - IFLA_IPTUN_6RD_RELAY_PREFIX, - IFLA_IPTUN_6RD_PREFIXLEN, - IFLA_IPTUN_6RD_RELAY_PREFIXLEN, -+ IFLA_IPTUN_FMRS, - __IFLA_IPTUN_MAX, - }; - #define IFLA_IPTUN_MAX (__IFLA_IPTUN_MAX - 1) - -+enum { -+ IFLA_IPTUN_FMR_UNSPEC, -+ IFLA_IPTUN_FMR_IP6_PREFIX, -+ IFLA_IPTUN_FMR_IP4_PREFIX, -+ IFLA_IPTUN_FMR_IP6_PREFIX_LEN, -+ IFLA_IPTUN_FMR_IP4_PREFIX_LEN, -+ IFLA_IPTUN_FMR_EA_LEN, -+ IFLA_IPTUN_FMR_OFFSET, -+ __IFLA_IPTUN_FMR_MAX, -+}; -+#define IFLA_IPTUN_FMR_MAX (__IFLA_IPTUN_FMR_MAX - 1) -+ - /* SIT-mode i_flags */ - #define SIT_ISATAP 0x0001 - ---- a/net/ipv6/ip6_tunnel.c -+++ b/net/ipv6/ip6_tunnel.c -@@ -16,6 +16,8 @@ - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * -+ * Changes: -+ * Steven Barth <cyrus@openwrt.org>: MAP-E FMR support - */ - - #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt -@@ -77,11 +79,9 @@ static bool log_ecn_error = true; - module_param(log_ecn_error, bool, 0644); - MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); - --static u32 HASH(const struct in6_addr *addr1, const struct in6_addr *addr2) -+static u32 HASH(const struct in6_addr *addr) - { -- u32 hash = ipv6_addr_hash(addr1) ^ ipv6_addr_hash(addr2); -- -- return hash_32(hash, HASH_SIZE_SHIFT); -+ return hash_32(ipv6_addr_hash(addr), HASH_SIZE_SHIFT); - } - - static int ip6_tnl_dev_init(struct net_device *dev); -@@ -180,15 +180,24 @@ EXPORT_SYMBOL_GPL(ip6_tnl_dst_store); - static struct ip6_tnl * - ip6_tnl_lookup(struct net *net, const struct in6_addr *remote, const struct in6_addr *local) - { -- unsigned int hash = HASH(remote, local); -+ unsigned int hash = HASH(local); - struct ip6_tnl *t; - struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); -+ struct __ip6_tnl_fmr *fmr; - - for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { -- if (ipv6_addr_equal(local, &t->parms.laddr) && -- ipv6_addr_equal(remote, &t->parms.raddr) && -- (t->dev->flags & IFF_UP)) -+ if (!ipv6_addr_equal(local, &t->parms.laddr) || -+ !(t->dev->flags & IFF_UP)) -+ continue; -+ -+ if (ipv6_addr_equal(remote, &t->parms.raddr)) - return t; -+ -+ for (fmr = t->parms.fmrs; fmr; fmr = fmr->next) { -+ if (ipv6_prefix_equal(remote, &fmr->ip6_prefix, -+ fmr->ip6_prefix_len)) -+ return t; -+ } - } - t = rcu_dereference(ip6n->tnls_wc[0]); - if (t && (t->dev->flags & IFF_UP)) -@@ -218,7 +227,7 @@ ip6_tnl_bucket(struct ip6_tnl_net *ip6n, - - if (!ipv6_addr_any(remote) || !ipv6_addr_any(local)) { - prio = 1; -- h = HASH(remote, local); -+ h = HASH(local); - } - return &ip6n->tnls[prio][h]; - } -@@ -383,6 +392,12 @@ ip6_tnl_dev_uninit(struct net_device *de - struct net *net = t->net; - struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); - -+ while (t->parms.fmrs) { -+ struct __ip6_tnl_fmr *next = t->parms.fmrs->next; -+ kfree(t->parms.fmrs); -+ t->parms.fmrs = next; -+ } -+ - if (dev == ip6n->fb_tnl_dev) - RCU_INIT_POINTER(ip6n->tnls_wc[0], NULL); - else -@@ -766,6 +781,108 @@ int ip6_tnl_rcv_ctl(struct ip6_tnl *t, - } - EXPORT_SYMBOL_GPL(ip6_tnl_rcv_ctl); - -+ -+/** -+ * ip4ip6_fmr_calc - calculate target / source IPv6-address based on FMR -+ * @dest: destination IPv6 address buffer -+ * @skb: received socket buffer -+ * @fmr: MAP FMR -+ * @xmit: Calculate for xmit or rcv -+ **/ -+static void ip4ip6_fmr_calc(struct in6_addr *dest, -+ const struct iphdr *iph, const uint8_t *end, -+ const struct __ip6_tnl_fmr *fmr, bool xmit) -+{ -+ int psidlen = fmr->ea_len - (32 - fmr->ip4_prefix_len); -+ u8 *portp = NULL; -+ bool use_dest_addr; -+ const struct iphdr *dsth = iph; -+ -+ if ((u8*)dsth >= end) -+ return; -+ -+ /* find significant IP header */ -+ if (iph->protocol == IPPROTO_ICMP) { -+ struct icmphdr *ih = (struct icmphdr*)(((u8*)dsth) + dsth->ihl * 4); -+ if (ih && ((u8*)&ih[1]) <= end && ( -+ ih->type == ICMP_DEST_UNREACH || -+ ih->type == ICMP_SOURCE_QUENCH || -+ ih->type == ICMP_TIME_EXCEEDED || -+ ih->type == ICMP_PARAMETERPROB || -+ ih->type == ICMP_REDIRECT)) -+ dsth = (const struct iphdr*)&ih[1]; -+ } -+ -+ /* in xmit-path use dest port by default and source port only if -+ this is an ICMP reply to something else; vice versa in rcv-path */ -+ use_dest_addr = (xmit && dsth == iph) || (!xmit && dsth != iph); -+ -+ /* get dst port */ -+ if (((u8*)&dsth[1]) <= end && ( -+ dsth->protocol == IPPROTO_UDP || -+ dsth->protocol == IPPROTO_TCP || -+ dsth->protocol == IPPROTO_SCTP || -+ dsth->protocol == IPPROTO_DCCP)) { -+ /* for UDP, TCP, SCTP and DCCP source and dest port -+ follow IPv4 header directly */ -+ portp = ((u8*)dsth) + dsth->ihl * 4; -+ -+ if (use_dest_addr) -+ portp += sizeof(u16); -+ } else if (iph->protocol == IPPROTO_ICMP) { -+ struct icmphdr *ih = (struct icmphdr*)(((u8*)dsth) + dsth->ihl * 4); -+ -+ /* use icmp identifier as port */ -+ if (((u8*)&ih) <= end && ( -+ (use_dest_addr && ( -+ ih->type == ICMP_ECHOREPLY || -+ ih->type == ICMP_TIMESTAMPREPLY || -+ ih->type == ICMP_INFO_REPLY || -+ ih->type == ICMP_ADDRESSREPLY)) || -+ (!use_dest_addr && ( -+ ih->type == ICMP_ECHO || -+ ih->type == ICMP_TIMESTAMP || -+ ih->type == ICMP_INFO_REQUEST || -+ ih->type == ICMP_ADDRESS) -+ ))) -+ portp = (u8*)&ih->un.echo.id; -+ } -+ -+ if ((portp && &portp[2] <= end) || psidlen == 0) { -+ int frombyte = fmr->ip6_prefix_len / 8; -+ int fromrem = fmr->ip6_prefix_len % 8; -+ int bytes = sizeof(struct in6_addr) - frombyte; -+ const u32 *addr = (use_dest_addr) ? &iph->daddr : &iph->saddr; -+ u64 eabits = ((u64)ntohl(*addr)) << (32 + fmr->ip4_prefix_len); -+ u64 t = 0; -+ -+ /* extract PSID from port and add it to eabits */ -+ u16 psidbits = 0; -+ if (psidlen > 0) { -+ psidbits = ((u16)portp[0]) << 8 | ((u16)portp[1]); -+ psidbits >>= 16 - psidlen - fmr->offset; -+ psidbits = (u16)(psidbits << (16 - psidlen)); -+ eabits |= ((u64)psidbits) << (48 - (fmr->ea_len - psidlen)); -+ } -+ -+ /* rewrite destination address */ -+ *dest = fmr->ip6_prefix; -+ memcpy(&dest->s6_addr[10], addr, sizeof(*addr)); -+ dest->s6_addr16[7] = htons(psidbits >> (16 - psidlen)); -+ -+ if (bytes > sizeof(u64)) -+ bytes = sizeof(u64); -+ -+ /* insert eabits */ -+ memcpy(&t, &dest->s6_addr[frombyte], bytes); -+ t = be64_to_cpu(t) & ~(((((u64)1) << fmr->ea_len) - 1) -+ << (64 - fmr->ea_len - fromrem)); -+ t = cpu_to_be64(t | (eabits >> fromrem)); -+ memcpy(&dest->s6_addr[frombyte], &t, bytes); -+ } -+} -+ -+ - /** - * ip6_tnl_rcv - decapsulate IPv6 packet and retransmit it locally - * @skb: received socket buffer -@@ -810,6 +927,26 @@ static int ip6_tnl_rcv(struct sk_buff *s - skb_reset_network_header(skb); - skb->protocol = htons(protocol); - memset(skb->cb, 0, sizeof(struct inet6_skb_parm)); -+ if (protocol == ETH_P_IP && -+ !ipv6_addr_equal(&ipv6h->saddr, &t->parms.raddr)) { -+ /* Packet didn't come from BR, so lookup FMR */ -+ struct __ip6_tnl_fmr *fmr; -+ struct in6_addr expected = t->parms.raddr; -+ for (fmr = t->parms.fmrs; fmr; fmr = fmr->next) -+ if (ipv6_prefix_equal(&ipv6h->saddr, -+ &fmr->ip6_prefix, fmr->ip6_prefix_len)) -+ break; -+ -+ /* Check that IPv6 matches IPv4 source to prevent spoofing */ -+ if (fmr) -+ ip4ip6_fmr_calc(&expected, ip_hdr(skb), -+ skb_tail_pointer(skb), fmr, false); -+ -+ if (!ipv6_addr_equal(&ipv6h->saddr, &expected)) { -+ rcu_read_unlock(); -+ goto discard; -+ } -+ } - - __skb_tunnel_rx(skb, t->dev, t->net); - -@@ -1070,6 +1207,7 @@ ip4ip6_tnl_xmit(struct sk_buff *skb, str - __u8 dsfield; - __u32 mtu; - int err; -+ struct __ip6_tnl_fmr *fmr; - - if ((t->parms.proto != IPPROTO_IPIP && t->parms.proto != 0) || - !ip6_tnl_xmit_ctl(t)) -@@ -1089,6 +1227,18 @@ ip4ip6_tnl_xmit(struct sk_buff *skb, str - if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK) - fl6.flowi6_mark = skb->mark; - -+ /* try to find matching FMR */ -+ for (fmr = t->parms.fmrs; fmr; fmr = fmr->next) { -+ unsigned mshift = 32 - fmr->ip4_prefix_len; -+ if (ntohl(fmr->ip4_prefix.s_addr) >> mshift == -+ ntohl(iph->daddr) >> mshift) -+ break; -+ } -+ -+ /* change dstaddr according to FMR */ -+ if (fmr) -+ ip4ip6_fmr_calc(&fl6.daddr, iph, skb_tail_pointer(skb), fmr, true); -+ - err = ip6_tnl_xmit2(skb, dev, dsfield, &fl6, encap_limit, &mtu); - if (err != 0) { - /* XXX: send ICMP error even if DF is not set. */ -@@ -1257,6 +1407,14 @@ ip6_tnl_change(struct ip6_tnl *t, const - t->parms.flowinfo = p->flowinfo; - t->parms.link = p->link; - t->parms.proto = p->proto; -+ -+ while (t->parms.fmrs) { -+ struct __ip6_tnl_fmr *next = t->parms.fmrs->next; -+ kfree(t->parms.fmrs); -+ t->parms.fmrs = next; -+ } -+ t->parms.fmrs = p->fmrs; -+ - ip6_tnl_dst_reset(t); - ip6_tnl_link_config(t); - return 0; -@@ -1287,6 +1445,7 @@ ip6_tnl_parm_from_user(struct __ip6_tnl_ - p->flowinfo = u->flowinfo; - p->link = u->link; - p->proto = u->proto; -+ p->fmrs = NULL; - memcpy(p->name, u->name, sizeof(u->name)); - } - -@@ -1569,6 +1728,15 @@ static int ip6_tnl_validate(struct nlatt - return 0; - } - -+static const struct nla_policy ip6_tnl_fmr_policy[IFLA_IPTUN_FMR_MAX + 1] = { -+ [IFLA_IPTUN_FMR_IP6_PREFIX] = { .len = sizeof(struct in6_addr) }, -+ [IFLA_IPTUN_FMR_IP4_PREFIX] = { .len = sizeof(struct in_addr) }, -+ [IFLA_IPTUN_FMR_IP6_PREFIX_LEN] = { .type = NLA_U8 }, -+ [IFLA_IPTUN_FMR_IP4_PREFIX_LEN] = { .type = NLA_U8 }, -+ [IFLA_IPTUN_FMR_EA_LEN] = { .type = NLA_U8 }, -+ [IFLA_IPTUN_FMR_OFFSET] = { .type = NLA_U8 } -+}; -+ - static void ip6_tnl_netlink_parms(struct nlattr *data[], - struct __ip6_tnl_parm *parms) - { -@@ -1602,6 +1770,46 @@ static void ip6_tnl_netlink_parms(struct - - if (data[IFLA_IPTUN_PROTO]) - parms->proto = nla_get_u8(data[IFLA_IPTUN_PROTO]); -+ -+ if (data[IFLA_IPTUN_FMRS]) { -+ unsigned rem; -+ struct nlattr *fmr; -+ nla_for_each_nested(fmr, data[IFLA_IPTUN_FMRS], rem) { -+ struct nlattr *fmrd[IFLA_IPTUN_FMR_MAX + 1], *c; -+ struct __ip6_tnl_fmr *nfmr; -+ -+ nla_parse_nested(fmrd, IFLA_IPTUN_FMR_MAX, -+ fmr, ip6_tnl_fmr_policy); -+ -+ if (!(nfmr = kzalloc(sizeof(*nfmr), GFP_KERNEL))) -+ continue; -+ -+ nfmr->offset = 6; -+ -+ if ((c = fmrd[IFLA_IPTUN_FMR_IP6_PREFIX])) -+ nla_memcpy(&nfmr->ip6_prefix, fmrd[IFLA_IPTUN_FMR_IP6_PREFIX], -+ sizeof(nfmr->ip6_prefix)); -+ -+ if ((c = fmrd[IFLA_IPTUN_FMR_IP4_PREFIX])) -+ nla_memcpy(&nfmr->ip4_prefix, fmrd[IFLA_IPTUN_FMR_IP4_PREFIX], -+ sizeof(nfmr->ip4_prefix)); -+ -+ if ((c = fmrd[IFLA_IPTUN_FMR_IP6_PREFIX_LEN])) -+ nfmr->ip6_prefix_len = nla_get_u8(c); -+ -+ if ((c = fmrd[IFLA_IPTUN_FMR_IP4_PREFIX_LEN])) -+ nfmr->ip4_prefix_len = nla_get_u8(c); -+ -+ if ((c = fmrd[IFLA_IPTUN_FMR_EA_LEN])) -+ nfmr->ea_len = nla_get_u8(c); -+ -+ if ((c = fmrd[IFLA_IPTUN_FMR_OFFSET])) -+ nfmr->offset = nla_get_u8(c); -+ -+ nfmr->next = parms->fmrs; -+ parms->fmrs = nfmr; -+ } -+ } - } - - static int ip6_tnl_newlink(struct net *src_net, struct net_device *dev, -@@ -1654,6 +1862,12 @@ static void ip6_tnl_dellink(struct net_d - - static size_t ip6_tnl_get_size(const struct net_device *dev) - { -+ const struct ip6_tnl *t = netdev_priv(dev); -+ struct __ip6_tnl_fmr *c; -+ int fmrs = 0; -+ for (c = t->parms.fmrs; c; c = c->next) -+ ++fmrs; -+ - return - /* IFLA_IPTUN_LINK */ - nla_total_size(4) + -@@ -1671,6 +1885,24 @@ static size_t ip6_tnl_get_size(const str - nla_total_size(4) + - /* IFLA_IPTUN_PROTO */ - nla_total_size(1) + -+ /* IFLA_IPTUN_FMRS */ -+ nla_total_size(0) + -+ ( -+ /* nest */ -+ nla_total_size(0) + -+ /* IFLA_IPTUN_FMR_IP6_PREFIX */ -+ nla_total_size(sizeof(struct in6_addr)) + -+ /* IFLA_IPTUN_FMR_IP4_PREFIX */ -+ nla_total_size(sizeof(struct in_addr)) + -+ /* IFLA_IPTUN_FMR_EA_LEN */ -+ nla_total_size(1) + -+ /* IFLA_IPTUN_FMR_IP6_PREFIX_LEN */ -+ nla_total_size(1) + -+ /* IFLA_IPTUN_FMR_IP4_PREFIX_LEN */ -+ nla_total_size(1) + -+ /* IFLA_IPTUN_FMR_OFFSET */ -+ nla_total_size(1) -+ ) * fmrs + - 0; - } - -@@ -1678,6 +1910,9 @@ static int ip6_tnl_fill_info(struct sk_b - { - struct ip6_tnl *tunnel = netdev_priv(dev); - struct __ip6_tnl_parm *parm = &tunnel->parms; -+ struct __ip6_tnl_fmr *c; -+ int fmrcnt = 0; -+ struct nlattr *fmrs; - - if (nla_put_u32(skb, IFLA_IPTUN_LINK, parm->link) || - nla_put(skb, IFLA_IPTUN_LOCAL, sizeof(struct in6_addr), -@@ -1688,8 +1923,27 @@ static int ip6_tnl_fill_info(struct sk_b - nla_put_u8(skb, IFLA_IPTUN_ENCAP_LIMIT, parm->encap_limit) || - nla_put_be32(skb, IFLA_IPTUN_FLOWINFO, parm->flowinfo) || - nla_put_u32(skb, IFLA_IPTUN_FLAGS, parm->flags) || -- nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->proto)) -+ nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->proto) || -+ !(fmrs = nla_nest_start(skb, IFLA_IPTUN_FMRS))) - goto nla_put_failure; -+ -+ for (c = parm->fmrs; c; c = c->next) { -+ struct nlattr *fmr = nla_nest_start(skb, ++fmrcnt); -+ if (!fmr || -+ nla_put(skb, IFLA_IPTUN_FMR_IP6_PREFIX, -+ sizeof(c->ip6_prefix), &c->ip6_prefix) || -+ nla_put(skb, IFLA_IPTUN_FMR_IP4_PREFIX, -+ sizeof(c->ip4_prefix), &c->ip4_prefix) || -+ nla_put_u8(skb, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, c->ip6_prefix_len) || -+ nla_put_u8(skb, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, c->ip4_prefix_len) || -+ nla_put_u8(skb, IFLA_IPTUN_FMR_EA_LEN, c->ea_len) || -+ nla_put_u8(skb, IFLA_IPTUN_FMR_OFFSET, c->offset)) -+ goto nla_put_failure; -+ -+ nla_nest_end(skb, fmr); -+ } -+ nla_nest_end(skb, fmrs); -+ - return 0; - - nla_put_failure: -@@ -1705,6 +1959,7 @@ static const struct nla_policy ip6_tnl_p - [IFLA_IPTUN_FLOWINFO] = { .type = NLA_U32 }, - [IFLA_IPTUN_FLAGS] = { .type = NLA_U32 }, - [IFLA_IPTUN_PROTO] = { .type = NLA_U8 }, -+ [IFLA_IPTUN_FMRS] = { .type = NLA_NESTED }, - }; - - static struct rtnl_link_ops ip6_link_ops __read_mostly = { |