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-rw-r--r--main/linux-headers/linux-nbma-mroute-v4-2.6.29.diff321
1 files changed, 321 insertions, 0 deletions
diff --git a/main/linux-headers/linux-nbma-mroute-v4-2.6.29.diff b/main/linux-headers/linux-nbma-mroute-v4-2.6.29.diff
new file mode 100644
index 000000000..a79adc281
--- /dev/null
+++ b/main/linux-headers/linux-nbma-mroute-v4-2.6.29.diff
@@ -0,0 +1,321 @@
+diff --git a/include/linux/mroute.h b/include/linux/mroute.h
+index 8a45569..13500a3 100644
+--- a/include/linux/mroute.h
++++ b/include/linux/mroute.h
+@@ -33,7 +33,7 @@
+ #define SIOCGETSGCNT (SIOCPROTOPRIVATE+1)
+ #define SIOCGETRPF (SIOCPROTOPRIVATE+2)
+
+-#define MAXVIFS 32
++#define MAXVIFS 256
+ typedef unsigned long vifbitmap_t; /* User mode code depends on this lot */
+ typedef unsigned short vifi_t;
+ #define ALL_VIFS ((vifi_t)(-1))
+@@ -41,7 +41,7 @@ typedef unsigned short vifi_t;
+ /*
+ * Same idea as select
+ */
+-
++
+ #define VIFM_SET(n,m) ((m)|=(1<<(n)))
+ #define VIFM_CLR(n,m) ((m)&=~(1<<(n)))
+ #define VIFM_ISSET(n,m) ((m)&(1<<(n)))
+@@ -53,7 +53,7 @@ typedef unsigned short vifi_t;
+ * Passed by mrouted for an MRT_ADD_VIF - again we use the
+ * mrouted 3.6 structures for compatibility
+ */
+-
++
+ struct vifctl {
+ vifi_t vifc_vifi; /* Index of VIF */
+ unsigned char vifc_flags; /* VIFF_ flags */
+@@ -66,11 +66,12 @@ struct vifctl {
+ #define VIFF_TUNNEL 0x1 /* IPIP tunnel */
+ #define VIFF_SRCRT 0x2 /* NI */
+ #define VIFF_REGISTER 0x4 /* register vif */
++#define VIFF_NBMA 0x10
+
+ /*
+ * Cache manipulation structures for mrouted and PIMd
+ */
+-
++
+ struct mfcctl
+ {
+ struct in_addr mfcc_origin; /* Origin of mcast */
+@@ -83,10 +84,10 @@ struct mfcctl
+ int mfcc_expire;
+ };
+
+-/*
++/*
+ * Group count retrieval for mrouted
+ */
+-
++
+ struct sioc_sg_req
+ {
+ struct in_addr src;
+@@ -113,7 +114,7 @@ struct sioc_vif_req
+ * This is the format the mroute daemon expects to see IGMP control
+ * data. Magically happens to be like an IP packet as per the original
+ */
+-
++
+ struct igmpmsg
+ {
+ __u32 unused1,unused2;
+@@ -190,7 +191,7 @@ struct vif_device
+
+ #define VIFF_STATIC 0x8000
+
+-struct mfc_cache
++struct mfc_cache
+ {
+ struct mfc_cache *next; /* Next entry on cache line */
+ __be32 mfc_mcastgrp; /* Group the entry belongs to */
+@@ -224,7 +225,7 @@ struct mfc_cache
+ #define MFC_HASH(a,b) (((((__force u32)(__be32)a)>>24)^(((__force u32)(__be32)b)>>26))&(MFC_LINES-1))
+ #else
+ #define MFC_HASH(a,b) ((((__force u32)(__be32)a)^(((__force u32)(__be32)b)>>2))&(MFC_LINES-1))
+-#endif
++#endif
+
+ #endif
+
+diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
+index 1466644..5adea03 100644
+--- a/net/ipv4/ipmr.c
++++ b/net/ipv4/ipmr.c
+@@ -116,6 +116,31 @@ static struct net_protocol pim_protocol;
+
+ static struct timer_list ipmr_expire_timer;
+
++static __be32 ipmr_get_skb_nbma(struct sk_buff *skb)
++{
++ union {
++ char addr[MAX_ADDR_LEN];
++ __be32 inaddr;
++ } u;
++
++ if (dev_parse_header(skb, u.addr) != 4)
++ return INADDR_ANY;
++
++ return u.inaddr;
++}
++
++static int ip_mr_match_vif_skb(struct vif_device *vif, struct sk_buff *skb)
++{
++ if (vif->dev != skb->dev)
++ return 0;
++
++ if (vif->flags & VIFF_NBMA)
++ return ipmr_get_skb_nbma(skb) == vif->remote;
++
++ return 1;
++}
++
++
+ /* Service routines creating virtual interfaces: DVMRP tunnels and PIMREG */
+
+ static void ipmr_del_tunnel(struct net_device *dev, struct vifctl *v)
+@@ -468,6 +493,7 @@ static int vif_add(struct vifctl *vifc, int mrtsock)
+ return err;
+ }
+ break;
++ case VIFF_NBMA:
+ case 0:
+ dev = ip_dev_find(&init_net, vifc->vifc_lcl_addr.s_addr);
+ if (!dev)
+@@ -502,7 +528,7 @@ static int vif_add(struct vifctl *vifc, int mrtsock)
+ v->pkt_in = 0;
+ v->pkt_out = 0;
+ v->link = dev->ifindex;
+- if (v->flags&(VIFF_TUNNEL|VIFF_REGISTER))
++ if (v->flags&(VIFF_TUNNEL|VIFF_REGISTER|VIFF_NBMA))
+ v->link = dev->iflink;
+
+ /* And finish update writing critical data */
+@@ -1191,12 +1217,15 @@ static inline int ipmr_forward_finish(struct sk_buff *skb)
+ {
+ struct ip_options * opt = &(IPCB(skb)->opt);
+
+- IP_INC_STATS_BH(dev_net(skb->dst->dev), IPSTATS_MIB_OUTFORWDATAGRAMS);
++ IP_INC_STATS_BH(dev_net(skb->dev), IPSTATS_MIB_OUTFORWDATAGRAMS);
+
+ if (unlikely(opt->optlen))
+ ip_forward_options(skb);
+
+- return dst_output(skb);
++ if (skb->dst != NULL)
++ return dst_output(skb);
++ else
++ return dev_queue_xmit(skb);
+ }
+
+ /*
+@@ -1208,7 +1237,8 @@ static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi)
+ const struct iphdr *iph = ip_hdr(skb);
+ struct vif_device *vif = &vif_table[vifi];
+ struct net_device *dev;
+- struct rtable *rt;
++ struct net_device *fromdev = skb->dev;
++ struct rtable *rt = NULL;
+ int encap = 0;
+
+ if (vif->dev == NULL)
+@@ -1236,6 +1266,19 @@ static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi)
+ if (ip_route_output_key(&init_net, &rt, &fl))
+ goto out_free;
+ encap = sizeof(struct iphdr);
++ dev = rt->u.dst.dev;
++ } else if (vif->flags&VIFF_NBMA) {
++ /* Fixme, we should take tunnel source address from the
++ * tunnel device binding if it exists */
++ struct flowi fl = { .oif = vif->link,
++ .nl_u = { .ip4_u =
++ { .daddr = vif->remote,
++ .tos = RT_TOS(iph->tos) } },
++ .proto = IPPROTO_GRE };
++ if (ip_route_output_key(&init_net, &rt, &fl))
++ goto out_free;
++ encap = LL_RESERVED_SPACE(rt->u.dst.dev);
++ dev = vif->dev;
+ } else {
+ struct flowi fl = { .oif = vif->link,
+ .nl_u = { .ip4_u =
+@@ -1244,34 +1287,39 @@ static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi)
+ .proto = IPPROTO_IPIP };
+ if (ip_route_output_key(&init_net, &rt, &fl))
+ goto out_free;
++ dev = rt->u.dst.dev;
+ }
+
+- dev = rt->u.dst.dev;
++ if (!(vif->flags & VIFF_NBMA)) {
++ if (skb->len+encap > dst_mtu(&rt->u.dst) && (ntohs(iph->frag_off) & IP_DF)) {
++ /* Do not fragment multicasts. Alas, IPv4 does not
++ allow to send ICMP, so that packets will disappear
++ to blackhole.
++ */
+
+- if (skb->len+encap > dst_mtu(&rt->u.dst) && (ntohs(iph->frag_off) & IP_DF)) {
+- /* Do not fragment multicasts. Alas, IPv4 does not
+- allow to send ICMP, so that packets will disappear
+- to blackhole.
+- */
+-
+- IP_INC_STATS_BH(dev_net(dev), IPSTATS_MIB_FRAGFAILS);
+- ip_rt_put(rt);
+- goto out_free;
++ IP_INC_STATS_BH(dev_net(dev), IPSTATS_MIB_FRAGFAILS);
++ goto out_free_rt;
++ }
+ }
+
+ encap += LL_RESERVED_SPACE(dev) + rt->u.dst.header_len;
+
+- if (skb_cow(skb, encap)) {
+- ip_rt_put(rt);
+- goto out_free;
+- }
++ if (skb_cow(skb, encap))
++ goto out_free_rt;
+
+ vif->pkt_out++;
+ vif->bytes_out += skb->len;
+
+ dst_release(skb->dst);
+- skb->dst = &rt->u.dst;
++ if (vif->flags & VIFF_NBMA) {
++ ip_rt_put(rt);
++ skb->dst = NULL;
++ rt = NULL;
++ } else {
++ skb->dst = &rt->u.dst;
++ }
+ ip_decrease_ttl(ip_hdr(skb));
++ skb->dev = dev;
+
+ /* FIXME: forward and output firewalls used to be called here.
+ * What do we do with netfilter? -- RR */
+@@ -1280,6 +1328,10 @@ static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi)
+ /* FIXME: extra output firewall step used to be here. --RR */
+ vif->dev->stats.tx_packets++;
+ vif->dev->stats.tx_bytes += skb->len;
++ } else if (vif->flags & VIFF_NBMA) {
++ if (dev_hard_header(skb, dev, ntohs(skb->protocol),
++ &vif->remote, NULL, 4) < 0)
++ goto out_free_rt;
+ }
+
+ IPCB(skb)->flags |= IPSKB_FORWARDED;
+@@ -1295,20 +1347,29 @@ static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi)
+ * not mrouter) cannot join to more than one interface - it will
+ * result in receiving multiple packets.
+ */
+- NF_HOOK(PF_INET, NF_INET_FORWARD, skb, skb->dev, dev,
++ NF_HOOK(PF_INET, NF_INET_FORWARD, skb, fromdev, dev,
+ ipmr_forward_finish);
+ return;
+
++out_free_rt:
++ if (rt != NULL)
++ ip_rt_put(rt);
+ out_free:
+ kfree_skb(skb);
+ return;
+ }
+
+-static int ipmr_find_vif(struct net_device *dev)
++static int ipmr_find_vif(struct net_device *dev, __be32 nbma_origin)
+ {
+ int ct;
+ for (ct=maxvif-1; ct>=0; ct--) {
+- if (vif_table[ct].dev == dev)
++ if (vif_table[ct].dev != dev)
++ continue;
++
++ if (vif_table[ct].flags & VIFF_NBMA) {
++ if (vif_table[ct].remote == nbma_origin)
++ break;
++ } else if (nbma_origin == INADDR_ANY)
+ break;
+ }
+ return ct;
+@@ -1328,7 +1389,7 @@ static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local
+ /*
+ * Wrong interface: drop packet and (maybe) send PIM assert.
+ */
+- if (vif_table[vif].dev != skb->dev) {
++ if (!ip_mr_match_vif_skb(&vif_table[vif], skb)) {
+ int true_vifi;
+
+ if (skb->rtable->fl.iif == 0) {
+@@ -1347,7 +1408,7 @@ static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local
+ }
+
+ cache->mfc_un.res.wrong_if++;
+- true_vifi = ipmr_find_vif(skb->dev);
++ true_vifi = ipmr_find_vif(skb->dev, ipmr_get_skb_nbma(skb));
+
+ if (true_vifi >= 0 && mroute_do_assert &&
+ /* pimsm uses asserts, when switching from RPT to SPT,
+@@ -1454,7 +1515,7 @@ int ip_mr_input(struct sk_buff *skb)
+ skb = skb2;
+ }
+
+- vif = ipmr_find_vif(skb->dev);
++ vif = ipmr_find_vif(skb->dev, ipmr_get_skb_nbma(skb));
+ if (vif >= 0) {
+ int err = ipmr_cache_unresolved(vif, skb);
+ read_unlock(&mrt_lock);
+@@ -1634,7 +1695,7 @@ int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait)
+ }
+
+ dev = skb->dev;
+- if (dev == NULL || (vif = ipmr_find_vif(dev)) < 0) {
++ if (dev == NULL || (vif = ipmr_find_vif(dev, INADDR_ANY)) < 0) {
+ read_unlock(&mrt_lock);
+ return -ENODEV;
+ }