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212f5cbc | 1 | /* Ethernet-VPN Attribute handling file |
896014f4 DL |
2 | * Copyright (C) 2016 6WIND |
3 | * | |
4 | * This file is part of FRRouting. | |
5 | * | |
6 | * FRRouting is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * FRRouting is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
212f5cbc PG |
20 | |
21 | #include <zebra.h> | |
22 | ||
23 | #include "command.h" | |
7ef5a232 | 24 | #include "filter.h" |
212f5cbc PG |
25 | #include "prefix.h" |
26 | #include "log.h" | |
27 | #include "memory.h" | |
28 | #include "stream.h" | |
29 | ||
dfa42ea3 PG |
30 | #include "bgpd/bgpd.h" |
31 | #include "bgpd/bgp_attr.h" | |
32 | #include "bgpd/bgp_route.h" | |
212f5cbc | 33 | #include "bgpd/bgp_attr_evpn.h" |
dfa42ea3 | 34 | #include "bgpd/bgp_ecommunity.h" |
3da6fcd5 | 35 | #include "bgpd/bgp_evpn.h" |
128ea8ab | 36 | #include "bgpd/bgp_evpn_private.h" |
dfa42ea3 | 37 | |
31689a53 | 38 | void bgp_add_routermac_ecom(struct attr *attr, struct ethaddr *routermac) |
dfa42ea3 | 39 | { |
d62a17ae | 40 | struct ecommunity_val routermac_ecom; |
41 | ||
42 | memset(&routermac_ecom, 0, sizeof(struct ecommunity_val)); | |
43 | routermac_ecom.val[0] = ECOMMUNITY_ENCODE_EVPN; | |
44 | routermac_ecom.val[1] = ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC; | |
28328ea9 | 45 | memcpy(&routermac_ecom.val[2], routermac->octet, ETH_ALEN); |
d62a17ae | 46 | if (!attr->ecommunity) |
47 | attr->ecommunity = ecommunity_new(); | |
48 | ecommunity_add_val(attr->ecommunity, &routermac_ecom); | |
49 | ecommunity_str(attr->ecommunity); | |
dfa42ea3 | 50 | } |
212f5cbc | 51 | |
212f5cbc PG |
52 | /* converts to an esi |
53 | * returns 1 on success, 0 otherwise | |
54 | * format accepted: AA:BB:CC:DD:EE:FF:GG:HH:II:JJ | |
55 | * if id is null, check only is done | |
56 | */ | |
4d0e6ece | 57 | int str2esi(const char *str, struct eth_segment_id *id) |
212f5cbc | 58 | { |
d62a17ae | 59 | unsigned int a[ESI_LEN]; |
60 | int i; | |
61 | ||
62 | if (!str) | |
63 | return 0; | |
64 | if (sscanf(str, "%2x:%2x:%2x:%2x:%2x:%2x:%2x:%2x:%2x:%2x", a + 0, a + 1, | |
65 | a + 2, a + 3, a + 4, a + 5, a + 6, a + 7, a + 8, a + 9) | |
66 | != ESI_LEN) { | |
67 | /* error in incoming str length */ | |
68 | return 0; | |
69 | } | |
70 | /* valid mac address */ | |
71 | if (!id) | |
72 | return 1; | |
73 | for (i = 0; i < ESI_LEN; ++i) | |
74 | id->val[i] = a[i] & 0xff; | |
75 | return 1; | |
212f5cbc PG |
76 | } |
77 | ||
4d0e6ece | 78 | char *esi2str(struct eth_segment_id *id) |
212f5cbc | 79 | { |
d62a17ae | 80 | char *ptr; |
d7c0a89a | 81 | uint8_t *val; |
212f5cbc | 82 | |
d62a17ae | 83 | if (!id) |
84 | return NULL; | |
212f5cbc | 85 | |
d62a17ae | 86 | val = id->val; |
87 | ptr = (char *)XMALLOC(MTYPE_TMP, | |
88 | (ESI_LEN * 2 + ESI_LEN - 1 + 1) * sizeof(char)); | |
212f5cbc | 89 | |
d62a17ae | 90 | snprintf(ptr, (ESI_LEN * 2 + ESI_LEN - 1 + 1), |
91 | "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x", val[0], | |
92 | val[1], val[2], val[3], val[4], val[5], val[6], val[7], val[8], | |
93 | val[9]); | |
212f5cbc | 94 | |
d62a17ae | 95 | return ptr; |
212f5cbc PG |
96 | } |
97 | ||
212f5cbc PG |
98 | char *ecom_mac2str(char *ecom_mac) |
99 | { | |
d62a17ae | 100 | char *en; |
212f5cbc | 101 | |
d62a17ae | 102 | en = ecom_mac; |
103 | en += 2; | |
128ea8ab | 104 | |
d62a17ae | 105 | return prefix_mac2str((struct ethaddr *)en, NULL, 0); |
128ea8ab | 106 | } |
107 | ||
bc59a672 | 108 | /* Fetch router-mac from extended community */ |
996c9314 | 109 | void bgp_attr_rmac(struct attr *attr, struct ethaddr *rmac) |
bc59a672 MK |
110 | { |
111 | int i = 0; | |
112 | struct ecommunity *ecom; | |
113 | ||
114 | ecom = attr->ecommunity; | |
115 | if (!ecom || !ecom->size) | |
116 | return; | |
117 | ||
118 | /* If there is a router mac extended community, set RMAC in attr */ | |
119 | for (i = 0; i < ecom->size; i++) { | |
d7c0a89a QY |
120 | uint8_t *pnt = NULL; |
121 | uint8_t type = 0; | |
122 | uint8_t sub_type = 0; | |
bc59a672 MK |
123 | |
124 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
125 | type = *pnt++; | |
126 | sub_type = *pnt++; | |
127 | ||
996c9314 LB |
128 | if (!(type == ECOMMUNITY_ENCODE_EVPN |
129 | && sub_type == ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC)) | |
bc59a672 MK |
130 | continue; |
131 | ||
132 | memcpy(rmac, pnt, ETH_ALEN); | |
133 | } | |
134 | } | |
135 | ||
ead40654 MK |
136 | /* |
137 | * return true if attr contains default gw extended community | |
138 | */ | |
139 | uint8_t bgp_attr_default_gw(struct attr *attr) | |
140 | { | |
996c9314 LB |
141 | struct ecommunity *ecom; |
142 | int i; | |
ead40654 MK |
143 | |
144 | ecom = attr->ecommunity; | |
145 | if (!ecom || !ecom->size) | |
146 | return 0; | |
147 | ||
148 | /* If there is a default gw extendd community return true otherwise | |
149 | * return 0 */ | |
150 | for (i = 0; i < ecom->size; i++) { | |
d7c0a89a QY |
151 | uint8_t *pnt; |
152 | uint8_t type, sub_type; | |
ead40654 MK |
153 | |
154 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
155 | type = *pnt++; | |
156 | sub_type = *pnt++; | |
157 | ||
158 | if ((type == ECOMMUNITY_ENCODE_OPAQUE | |
996c9314 | 159 | && sub_type == ECOMMUNITY_EVPN_SUBTYPE_DEF_GW)) |
ead40654 MK |
160 | return 1; |
161 | } | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
128ea8ab | 166 | /* |
167 | * Fetch and return the sequence number from MAC Mobility extended | |
168 | * community, if present, else 0. | |
169 | */ | |
d7c0a89a | 170 | uint32_t bgp_attr_mac_mobility_seqnum(struct attr *attr, uint8_t *sticky) |
128ea8ab | 171 | { |
d62a17ae | 172 | struct ecommunity *ecom; |
173 | int i; | |
d7c0a89a | 174 | uint8_t flags = 0; |
d62a17ae | 175 | |
176 | ecom = attr->ecommunity; | |
177 | if (!ecom || !ecom->size) | |
178 | return 0; | |
179 | ||
180 | /* If there is a MAC Mobility extended community, return its | |
181 | * sequence number. | |
182 | * TODO: RFC is silent on handling of multiple MAC mobility extended | |
183 | * communities for the same route. We will bail out upon the first | |
184 | * one. | |
185 | */ | |
186 | for (i = 0; i < ecom->size; i++) { | |
d7c0a89a QY |
187 | uint8_t *pnt; |
188 | uint8_t type, sub_type; | |
189 | uint32_t seq_num; | |
d62a17ae | 190 | |
191 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
192 | type = *pnt++; | |
193 | sub_type = *pnt++; | |
194 | if (!(type == ECOMMUNITY_ENCODE_EVPN | |
195 | && sub_type == ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY)) | |
196 | continue; | |
197 | flags = *pnt++; | |
198 | ||
199 | if (flags & ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY) | |
200 | *sticky = 1; | |
201 | else | |
202 | *sticky = 0; | |
203 | ||
204 | pnt++; | |
937652c6 DL |
205 | pnt = ptr_get_be32(pnt, &seq_num); |
206 | (void)pnt; /* consume value */ | |
d62a17ae | 207 | return seq_num; |
208 | } | |
209 | ||
210 | return 0; | |
212f5cbc | 211 | } |
3da6fcd5 PG |
212 | |
213 | /* dst prefix must be AF_INET or AF_INET6 prefix, to forge EVPN prefix */ | |
d62a17ae | 214 | extern int bgp_build_evpn_prefix(int evpn_type, uint32_t eth_tag, |
215 | struct prefix *dst) | |
3da6fcd5 | 216 | { |
d62a17ae | 217 | struct evpn_addr *p_evpn_p; |
218 | struct prefix p2; | |
219 | struct prefix *src = &p2; | |
220 | ||
221 | if (!dst || dst->family == 0) | |
222 | return -1; | |
223 | /* store initial prefix in src */ | |
224 | prefix_copy(src, dst); | |
225 | memset(dst, 0, sizeof(struct prefix)); | |
226 | p_evpn_p = &(dst->u.prefix_evpn); | |
b03b8898 | 227 | dst->family = AF_EVPN; |
d62a17ae | 228 | p_evpn_p->route_type = evpn_type; |
229 | if (evpn_type == BGP_EVPN_IP_PREFIX_ROUTE) { | |
230 | p_evpn_p->eth_tag = eth_tag; | |
231 | p_evpn_p->ip_prefix_length = p2.prefixlen; | |
232 | if (src->family == AF_INET) { | |
233 | SET_IPADDR_V4(&p_evpn_p->ip); | |
234 | memcpy(&p_evpn_p->ip.ipaddr_v4, &src->u.prefix4, | |
235 | sizeof(struct in_addr)); | |
d7c0a89a | 236 | dst->prefixlen = (uint8_t)PREFIX_LEN_ROUTE_TYPE_5_IPV4; |
d62a17ae | 237 | } else { |
238 | SET_IPADDR_V6(&p_evpn_p->ip); | |
239 | memcpy(&p_evpn_p->ip.ipaddr_v6, &src->u.prefix6, | |
240 | sizeof(struct in6_addr)); | |
d7c0a89a | 241 | dst->prefixlen = (uint8_t)PREFIX_LEN_ROUTE_TYPE_5_IPV6; |
d62a17ae | 242 | } |
243 | } else | |
244 | return -1; | |
245 | return 0; | |
3da6fcd5 | 246 | } |