#include "nest/bird.h" #include "lib/ip.h" #include "lib/net.h" const char * const net_label[] = { [NET_IP4] = "ipv4", [NET_IP6] = "ipv6", [NET_VPN4] = "vpn4", [NET_VPN6] = "vpn6", [NET_MPLS] = "mpls", }; const u16 net_addr_length[] = { [NET_IP4] = sizeof(net_addr_ip4), [NET_IP6] = sizeof(net_addr_ip6), [NET_VPN4] = sizeof(net_addr_vpn4), [NET_VPN6] = sizeof(net_addr_vpn6), [NET_ROA4] = sizeof(net_addr_roa4), [NET_ROA6] = sizeof(net_addr_roa6), [NET_MPLS] = sizeof(net_addr_mpls), }; const u8 net_max_prefix_length[] = { [NET_IP4] = IP4_MAX_PREFIX_LENGTH, [NET_IP6] = IP6_MAX_PREFIX_LENGTH, [NET_VPN4] = IP4_MAX_PREFIX_LENGTH, [NET_VPN6] = IP6_MAX_PREFIX_LENGTH, [NET_ROA4] = IP4_MAX_PREFIX_LENGTH, [NET_ROA6] = IP6_MAX_PREFIX_LENGTH, [NET_MPLS] = 0 }; const u16 net_max_text_length[] = { [NET_IP4] = 18, /* "255.255.255.255/32" */ [NET_IP6] = 43, /* "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff/128" */ [NET_VPN4] = 40, /* "4294967296:4294967296 255.255.255.255/32" */ [NET_VPN6] = 65, /* "4294967296:4294967296 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff/128" */ [NET_ROA4] = 34, /* "255.255.255.255/32-32 AS4294967295" */ [NET_ROA6] = 60, /* "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff/128-128 AS4294967295" */ [NET_MPLS] = 7, /* "1048575" */ }; int net_format(const net_addr *N, char *buf, int buflen) { net_addr_union *n = (void *) N; buf[0] = 0; switch (n->n.type) { case NET_IP4: return bsnprintf(buf, buflen, "%I4/%d", n->ip4.prefix, n->ip4.pxlen); case NET_IP6: return bsnprintf(buf, buflen, "%I6/%d", n->ip6.prefix, n->ip6.pxlen); case NET_VPN4: switch (n->vpn4.rd >> 48) { case 0: return bsnprintf(buf, buflen, "0:%u:%u %I4/%d", (u32) (n->vpn4.rd >> 32), (u32) n->vpn4.rd, n->vpn4.prefix, n->vpn4.pxlen); case 1: return bsnprintf(buf, buflen, "1:%I4:%u %I4/%d", ip4_from_u32(n->vpn4.rd >> 16), (u32) (n->vpn4.rd & 0xffff), n->vpn4.prefix, n->vpn4.pxlen); case 2: return bsnprintf(buf, buflen, "2:%u:%u %I4/%d", (u32) (n->vpn4.rd >> 16), (u32) (n->vpn4.rd & 0xffff), n->vpn4.prefix, n->vpn4.pxlen); } return bsnprintf(buf, buflen, "X: %016x %I4/%d", (n->vpn4.rd), n->vpn4.prefix, n->vpn4.pxlen); /* XXX: RD format is specified for VPN4; not found any for VPN6, reusing the same as for VPN4. */ case NET_VPN6: switch (n->vpn6.rd >> 48) { case 0: return bsnprintf(buf, buflen, "0:%u:%u %I6/%d", (u32) (n->vpn6.rd >> 32), (u32) n->vpn6.rd, n->vpn6.prefix, n->vpn6.pxlen); case 1: return bsnprintf(buf, buflen, "1:%I4:%u %I6/%d", ip4_from_u32(n->vpn6.rd >> 16), (u32) (n->vpn6.rd & 0xffff), n->vpn6.prefix, n->vpn6.pxlen); case 2: return bsnprintf(buf, buflen, "2:%u:%u %I6/%d", (u32) (n->vpn6.rd >> 16), (u32) (n->vpn6.rd & 0xffff), n->vpn6.prefix, n->vpn6.pxlen); } return bsnprintf(buf, buflen, "X: %016x %I6/%d", (n->vpn6.rd), n->vpn6.prefix, n->vpn6.pxlen); case NET_ROA4: return bsnprintf(buf, buflen, "%I4/%u-%u AS%u", n->roa4.prefix, n->roa4.pxlen, n->roa4.max_pxlen, n->roa4.asn); case NET_ROA6: return bsnprintf(buf, buflen, "%I6/%u-%u AS%u", n->roa6.prefix, n->roa6.pxlen, n->roa6.max_pxlen, n->roa6.asn); case NET_MPLS: return bsnprintf(buf, buflen, "%u", n->mpls.label); } bug("unknown network type"); } ip_addr net_pxmask(const net_addr *a) { switch (a->type) { case NET_IP4: case NET_VPN4: case NET_ROA4: return ipa_from_ip4(ip4_mkmask(net4_pxlen(a))); case NET_IP6: case NET_VPN6: case NET_ROA6: return ipa_from_ip6(ip6_mkmask(net6_pxlen(a))); case NET_MPLS: default: return IPA_NONE; } } int net_compare(const net_addr *a, const net_addr *b) { if (a->type != b->type) return uint_cmp(a->type, b->type); switch (a->type) { case NET_IP4: return net_compare_ip4((const net_addr_ip4 *) a, (const net_addr_ip4 *) b); case NET_IP6: return net_compare_ip6((const net_addr_ip6 *) a, (const net_addr_ip6 *) b); case NET_VPN4: return net_compare_vpn4((const net_addr_vpn4 *) a, (const net_addr_vpn4 *) b); case NET_VPN6: return net_compare_vpn6((const net_addr_vpn6 *) a, (const net_addr_vpn6 *) b); case NET_ROA4: return net_compare_roa4((const net_addr_roa4 *) a, (const net_addr_roa4 *) b); case NET_ROA6: return net_compare_roa6((const net_addr_roa6 *) a, (const net_addr_roa6 *) b); case NET_MPLS: return net_compare_mpls((const net_addr_mpls *) a, (const net_addr_mpls *) b); } return 0; } int net_validate(const net_addr *N) { switch (N->type) { case NET_IP4: case NET_VPN4: case NET_ROA4: return net_validate_ip4((net_addr_ip4 *) N); case NET_IP6: case NET_VPN6: case NET_ROA6: return net_validate_ip6((net_addr_ip6 *) N); case NET_MPLS: return net_validate_mpls((net_addr_mpls *) N); default: return 0; } } void net_normalize(net_addr *N) { net_addr_union *n = (void *) N; switch (n->n.type) { case NET_IP4: case NET_VPN4: case NET_ROA4: return net_normalize_ip4(&n->ip4); case NET_IP6: case NET_VPN6: case NET_ROA6: return net_normalize_ip6(&n->ip6); case NET_MPLS: return; } } int net_classify(const net_addr *N) { net_addr_union *n = (void *) N; switch (n->n.type) { case NET_IP4: case NET_VPN4: case NET_ROA4: return ip4_zero(n->ip4.prefix) ? (IADDR_HOST | SCOPE_UNIVERSE) : ip4_classify(n->ip4.prefix); case NET_IP6: case NET_VPN6: case NET_ROA6: return ip6_zero(n->ip6.prefix) ? (IADDR_HOST | SCOPE_UNIVERSE) : ip6_classify(&n->ip6.prefix); case NET_MPLS: return IADDR_HOST | SCOPE_UNIVERSE; } return IADDR_INVALID; } int ipa_in_netX(const ip_addr a, const net_addr *n) { switch (n->type) { case NET_IP4: case NET_VPN4: case NET_ROA4: if (!ipa_is_ip4(a)) return 0; return ip4_zero(ip4_and(ip4_xor(ipa_to_ip4(a), net4_prefix(n)), ip4_mkmask(net4_pxlen(n)))); case NET_IP6: case NET_VPN6: case NET_ROA6: if (ipa_is_ip4(a)) return 0; return ip6_zero(ip6_and(ip6_xor(ipa_to_ip6(a), net6_prefix(n)), ip6_mkmask(net6_pxlen(n)))); case NET_MPLS: default: return 0; } } int net_in_netX(const net_addr *a, const net_addr *n) { if (a->type != n->type) return 0; return (net_pxlen(n) <= net_pxlen(a)) && ipa_in_netX(net_prefix(a), n); }