diff options
Diffstat (limited to 'main/linux-headers/linux-nbma-mroute-v4-2.6.29.diff')
| -rw-r--r-- | main/linux-headers/linux-nbma-mroute-v4-2.6.29.diff | 321 |
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; + } |