KRT: Integration of IPv4/IPv6 in sysdep/linux
This commit is contained in:
Ondrej Zajicek (work)
parent
7fd4143ead
commit
29a6416276
3 changed files with 79 additions and 76 deletions
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@ -241,20 +241,20 @@ static struct nl_want_attrs ifla_attr_want[BIRD_IFLA_MAX] = {
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[IFLA_WIRELESS] = { 1, 0, 0 },
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};
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#define BIRD_IFA_MAX (IFA_ANYCAST+1)
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#ifndef IPV6
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static struct nl_want_attrs ifa_attr_want4[BIRD_IFA_MAX] = {
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[IFA_ADDRESS] = { 1, 1, sizeof(ip4_addr) },
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[IFA_LOCAL] = { 1, 1, sizeof(ip4_addr) },
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[IFA_BROADCAST] = { 1, 1, sizeof(ip4_addr) },
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};
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#else
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static struct nl_want_attrs ifa_attr_want6[BIRD_IFA_MAX] = {
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[IFA_ADDRESS] = { 1, 1, sizeof(ip6_addr) },
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[IFA_LOCAL] = { 1, 1, sizeof(ip6_addr) },
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};
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#endif
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#define BIRD_RTA_MAX (RTA_TABLE+1)
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@ -262,7 +262,6 @@ static struct nl_want_attrs mpnh_attr_want4[BIRD_RTA_MAX] = {
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[RTA_GATEWAY] = { 1, 1, sizeof(ip4_addr) },
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};
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#ifndef IPV6
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static struct nl_want_attrs rtm_attr_want4[BIRD_RTA_MAX] = {
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[RTA_DST] = { 1, 1, sizeof(ip4_addr) },
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[RTA_OIF] = { 1, 1, sizeof(u32) },
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@ -274,7 +273,7 @@ static struct nl_want_attrs rtm_attr_want4[BIRD_RTA_MAX] = {
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[RTA_FLOW] = { 1, 1, sizeof(u32) },
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[RTA_TABLE] = { 1, 1, sizeof(u32) },
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};
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#else
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static struct nl_want_attrs rtm_attr_want6[BIRD_RTA_MAX] = {
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[RTA_DST] = { 1, 1, sizeof(ip6_addr) },
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[RTA_IIF] = { 1, 1, sizeof(u32) },
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@ -286,7 +285,6 @@ static struct nl_want_attrs rtm_attr_want6[BIRD_RTA_MAX] = {
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[RTA_FLOW] = { 1, 1, sizeof(u32) },
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[RTA_TABLE] = { 1, 1, sizeof(u32) },
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};
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#endif
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static int
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@ -356,24 +354,32 @@ nl_add_attr(struct nlmsghdr *h, uint bufsize, uint code, const void *data, uint
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}
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static inline void
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nl_add_attr_u32(struct nlmsghdr *h, unsigned bufsize, int code, u32 data)
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nl_add_attr_u32(struct nlmsghdr *h, uint bufsize, int code, u32 data)
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{
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nl_add_attr(h, bufsize, code, &data, 4);
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}
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static inline void
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nl_add_attr_ipa(struct nlmsghdr *h, unsigned bufsize, int code, ip_addr ipa, int af)
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nl_add_attr_ip4(struct nlmsghdr *h, uint bufsize, int code, ip4_addr ip4)
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{
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if (af == AF_INET)
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{
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ip4_addr ip4 = ip4_hton(ipa_to_ip4(ipa));
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ip4 = ip4_hton(ip4);
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nl_add_attr(h, bufsize, code, &ip4, sizeof(ip4));
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}
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else
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static inline void
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nl_add_attr_ip6(struct nlmsghdr *h, uint bufsize, int code, ip6_addr ip6)
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{
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ip6_addr ip6 = ip6_hton(ipa_to_ip6(ipa));
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ip6 = ip6_hton(ip6);
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nl_add_attr(h, bufsize, code, &ip6, sizeof(ip6));
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}
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static inline void
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nl_add_attr_ipa(struct nlmsghdr *h, uint bufsize, int code, ip_addr ipa)
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{
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if (ipa_is_ip4(ipa))
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nl_add_attr_ip4(h, bufsize, code, ipa_to_ip4(ipa));
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else
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nl_add_attr_ip6(h, bufsize, code, ipa_to_ip6(ipa));
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}
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static inline struct rtattr *
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@ -409,7 +415,7 @@ nl_close_nexthop(struct nlmsghdr *h, struct rtnexthop *nh)
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}
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static void
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nl_add_multipath(struct nlmsghdr *h, unsigned bufsize, struct mpnh *nh)
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nl_add_multipath(struct nlmsghdr *h, uint bufsize, struct mpnh *nh)
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{
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struct rtattr *a = nl_open_attr(h, bufsize, RTA_MULTIPATH);
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@ -421,7 +427,7 @@ nl_add_multipath(struct nlmsghdr *h, unsigned bufsize, struct mpnh *nh)
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rtnh->rtnh_hops = nh->weight;
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rtnh->rtnh_ifindex = nh->iface->index;
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nl_add_attr_ipa(h, bufsize, RTA_GATEWAY, nh->gw, AF_INET);
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nl_add_attr_ipa(h, bufsize, RTA_GATEWAY, nh->gw);
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nl_close_nexthop(h, rtnh);
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}
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@ -808,13 +814,11 @@ nl_parse_addr(struct nlmsghdr *h, int scan)
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switch (i->ifa_family)
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{
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#ifndef IPV6
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case AF_INET:
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return nl_parse_addr4(i, scan, new);
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#else
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case AF_INET6:
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return nl_parse_addr6(i, scan, new);
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#endif
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}
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}
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@ -831,21 +835,21 @@ kif_do_scan(struct kif_proto *p UNUSED)
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nl_parse_link(h, 1);
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else
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log(L_DEBUG "nl_scan_ifaces: Unknown packet received (type=%d)", h->nlmsg_type);
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#ifndef IPV6
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nl_request_dump(AF_INET, RTM_GETADDR);
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while (h = nl_get_scan())
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if (h->nlmsg_type == RTM_NEWADDR || h->nlmsg_type == RTM_DELADDR)
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nl_parse_addr(h, 1);
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else
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log(L_DEBUG "nl_scan_ifaces: Unknown packet received (type=%d)", h->nlmsg_type);
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#else
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nl_request_dump(AF_INET6, RTM_GETADDR);
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while (h = nl_get_scan())
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if (h->nlmsg_type == RTM_NEWADDR || h->nlmsg_type == RTM_DELADDR)
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nl_parse_addr(h, 1);
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else
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log(L_DEBUG "nl_scan_ifaces: Unknown packet received (type=%d)", h->nlmsg_type);
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#endif
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if_end_update();
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}
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@ -861,10 +865,10 @@ krt_table_id(struct krt_proto *p)
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static HASH(struct krt_proto) nl_table_map;
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#define RTH_FN(k) u32_hash(k)
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#define RTH_EQ(k1,k2) k1 == k2
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#define RTH_KEY(p) krt_table_id(p)
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#define RTH_KEY(p) p->af, krt_table_id(p)
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#define RTH_NEXT(p) p->sys.hash_next
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#define RTH_EQ(a1,i1,a2,i2) a1 == a2 && i1 == i2
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#define RTH_FN(a,i) a ^ u32_hash(i)
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#define RTH_REHASH rth_rehash
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#define RTH_PARAMS /8, *2, 2, 2, 6, 20
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@ -925,24 +929,11 @@ nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int new)
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r.h.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
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r.h.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | (new ? NLM_F_CREATE|NLM_F_EXCL : 0);
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int af = AF_UNSPEC;
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switch(net->n.addr->type) {
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case NET_IP4:
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af = AF_INET;
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break;
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case NET_IP6:
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af = AF_INET6;
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break;
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default:
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bug("should not send vpn route to kernel");
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}
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r.r.rtm_family = af;
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r.r.rtm_family = p->af;
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r.r.rtm_dst_len = net_pxlen(net->n.addr);
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r.r.rtm_protocol = RTPROT_BIRD;
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r.r.rtm_scope = RT_SCOPE_UNIVERSE;
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nl_add_attr_ipa(&r.h, sizeof(r), RTA_DST, net_prefix(net->n.addr), af);
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nl_add_attr_ipa(&r.h, sizeof(r), RTA_DST, net_prefix(net->n.addr));
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if (krt_table_id(p) < 256)
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r.r.rtm_table = krt_table_id(p);
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@ -958,7 +949,7 @@ nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int new)
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nl_add_attr_u32(&r.h, sizeof(r), RTA_PRIORITY, ea->u.data);
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if (ea = ea_find(eattrs, EA_KRT_PREFSRC))
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nl_add_attr_ipa(&r.h, sizeof(r), RTA_PREFSRC, *(ip_addr *)ea->u.ptr->data, af);
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nl_add_attr_ipa(&r.h, sizeof(r), RTA_PREFSRC, *(ip_addr *)ea->u.ptr->data);
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if (ea = ea_find(eattrs, EA_KRT_REALM))
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nl_add_attr_u32(&r.h, sizeof(r), RTA_FLOW, ea->u.data);
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@ -986,7 +977,7 @@ nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int new)
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case RTD_ROUTER:
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r.r.rtm_type = RTN_UNICAST;
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nl_add_attr_u32(&r.h, sizeof(r), RTA_OIF, a->iface->index);
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nl_add_attr_ipa(&r.h, sizeof(r), RTA_GATEWAY, a->gw, af);
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nl_add_attr_ipa(&r.h, sizeof(r), RTA_GATEWAY, a->gw);
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break;
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case RTD_DEVICE:
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r.r.rtm_type = RTN_UNICAST;
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@ -1047,53 +1038,60 @@ nl_parse_route(struct nlmsghdr *h, int scan)
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struct rtattr *a[BIRD_RTA_MAX];
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int new = h->nlmsg_type == RTM_NEWROUTE;
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net_addr dst = { 0 };
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net_addr dst;
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u32 oif = ~0;
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u32 table;
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u32 table_id;
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int src;
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int ipv6 = 0;
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if (!(i = nl_checkin(h, sizeof(*i))))
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return;
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switch (i->rtm_family)
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{
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#ifndef IPV6
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case AF_INET:
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if (!nl_parse_attrs(RTM_RTA(i), rtm_attr_want4, a, sizeof(a)))
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return;
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if (a[RTA_DST])
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net_fill_ip4(&dst, rta_get_ip4(a[RTA_DST]), i->rtm_dst_len);
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else
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net_fill_ip4(&dst, IP4_NONE, 0);
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break;
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#else
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case AF_INET6:
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if (!nl_parse_attrs(RTM_RTA(i), rtm_attr_want6, a, sizeof(a)))
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return;
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ipv6 = 1;
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if (a[RTA_DST])
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net_fill_ip6(&dst, rta_get_ip6(a[RTA_DST]), i->rtm_dst_len);
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else
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net_fill_ip6(&dst, IP6_NONE, 0);
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break;
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#endif
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default:
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return;
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}
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if (a[RTA_DST])
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net_fill_ipa(&dst, rta_get_ipa(a[RTA_DST]), i->rtm_dst_len);
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if (a[RTA_OIF])
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oif = rta_get_u32(a[RTA_OIF]);
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if (a[RTA_TABLE])
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table = rta_get_u32(a[RTA_TABLE]);
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table_id = rta_get_u32(a[RTA_TABLE]);
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else
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table = i->rtm_table;
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table_id = i->rtm_table;
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p = HASH_FIND(nl_table_map, RTH, table); /* Do we know this table? */
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DBG("KRT: Got %I/%d, type=%d, oif=%d, table=%d, prid=%d, proto=%s\n", dst, i->rtm_dst_len, i->rtm_type, oif, table, i->rtm_protocol, p ? p->p.name : "(none)");
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/* Do we know this table? */
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p = HASH_FIND(nl_table_map, RTH, i->rtm_family, table_id);
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if (!p)
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SKIP("unknown table %d\n", table);
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if (a[RTA_IIF])
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SKIP("IIF set\n");
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if (i->rtm_tos != 0) /* We don't support TOS */
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SKIP("TOS %02x\n", i->rtm_tos);
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@ -1173,7 +1171,7 @@ nl_parse_route(struct nlmsghdr *h, int scan)
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ipa_ntoh(ra.gw);
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/* Silently skip strange 6to4 routes */
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if (ipv6 && ipa_in_net(ra.gw, IPA_NONE, 96))
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if ((i->rtm_family == AF_INET6) && ipa_in_net(ra.gw, IPA_NONE, 96))
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return;
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ng = neigh_find2(&p->p, &ra.gw, ra.iface,
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@ -1287,21 +1285,19 @@ krt_do_scan(struct krt_proto *p UNUSED) /* CONFIG_ALL_TABLES_AT_ONCE => p is NUL
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{
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struct nlmsghdr *h;
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#ifndef IPV6
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nl_request_dump(AF_INET, RTM_GETROUTE);
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while (h = nl_get_scan())
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if (h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)
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nl_parse_route(h, 1);
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else
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log(L_DEBUG "nl_scan_fire: Unknown packet received (type=%d)", h->nlmsg_type);
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#else
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nl_request_dump(AF_INET6, RTM_GETROUTE);
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while (h = nl_get_scan())
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if (h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)
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nl_parse_route(h, 1);
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else
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log(L_DEBUG "nl_scan_fire: Unknown packet received (type=%d)", h->nlmsg_type);
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#endif
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}
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/*
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@ -1407,11 +1403,10 @@ nl_open_async(void)
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bzero(&sa, sizeof(sa));
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sa.nl_family = AF_NETLINK;
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#ifdef IPV6
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sa.nl_groups = RTMGRP_LINK | RTMGRP_IPV6_IFADDR | RTMGRP_IPV6_ROUTE;
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#else
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sa.nl_groups = RTMGRP_LINK | RTMGRP_IPV4_IFADDR | RTMGRP_IPV4_ROUTE;
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#endif
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sa.nl_groups = RTMGRP_LINK |
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RTMGRP_IPV4_IFADDR | RTMGRP_IPV4_ROUTE |
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RTMGRP_IPV6_IFADDR | RTMGRP_IPV6_ROUTE;
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if (bind(fd, (struct sockaddr *) &sa, sizeof(sa)) < 0)
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{
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log(L_ERR "Unable to bind asynchronous rtnetlink socket: %m");
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@ -1443,7 +1438,7 @@ krt_sys_io_init(void)
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int
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krt_sys_start(struct krt_proto *p)
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{
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struct krt_proto *old = HASH_FIND(nl_table_map, RTH, krt_table_id(p));
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struct krt_proto *old = HASH_FIND(nl_table_map, RTH, p->af, krt_table_id(p));
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if (old)
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{
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@ -1121,6 +1121,13 @@ krt_start(struct proto *P)
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{
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struct krt_proto *p = (struct krt_proto *) P;
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switch (p->p.table->addr_type)
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{
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case NET_IP4: p->af = AF_INET; break;
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case NET_IP6: p->af = AF_INET6; break;
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default: ASSERT(0);
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}
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add_tail(&krt_proto_list, &p->krt_node);
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#ifdef KRT_ALLOW_LEARN
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@ -65,6 +65,7 @@ struct krt_proto {
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#endif
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node krt_node; /* Node in krt_proto_list */
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byte af; /* Kernel address family (AF_*) */
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byte ready; /* Initial feed has been finished */
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byte initialized; /* First scan has been finished */
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byte reload; /* Next scan is doing reload */
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