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8557760c | 1 | /* BGP RD definitions for BGP-based VPNs (IP/EVPN) |
2 | * -- brought over from bgpd/bgp_mplsvpn.c | |
3 | * Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org> | |
4 | * | |
5 | * This file is part of FRR. | |
6 | * | |
7 | * FRR is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * FRR is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with FRR; see the file COPYING. If not, write to the Free | |
19 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | * 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | #include "command.h" | |
25 | #include "log.h" | |
26 | #include "prefix.h" | |
27 | #include "memory.h" | |
28 | #include "stream.h" | |
29 | #include "filter.h" | |
30 | ||
31 | #include "bgpd/bgpd.h" | |
32 | #include "bgpd/bgp_rd.h" | |
33 | #include "bgpd/bgp_attr.h" | |
34 | ||
35 | #if ENABLE_BGP_VNC | |
36 | #include "bgpd/rfapi/rfapi_backend.h" | |
37 | #endif | |
38 | ||
d7c0a89a | 39 | uint16_t decode_rd_type(uint8_t *pnt) |
8557760c | 40 | { |
d7c0a89a | 41 | uint16_t v; |
8557760c | 42 | |
d7c0a89a | 43 | v = ((uint16_t)*pnt++ << 8); |
8557760c | 44 | #if ENABLE_BGP_VNC |
d62a17ae | 45 | /* |
46 | * VNC L2 stores LHI in lower byte, so omit it | |
47 | */ | |
48 | if (v != RD_TYPE_VNC_ETH) | |
d7c0a89a | 49 | v |= (uint16_t)*pnt; |
d62a17ae | 50 | #else /* duplicate code for clarity */ |
d7c0a89a | 51 | v |= (uint16_t)*pnt; |
8557760c | 52 | #endif |
d62a17ae | 53 | return v; |
8557760c | 54 | } |
55 | ||
d7c0a89a | 56 | void encode_rd_type(uint16_t v, uint8_t *pnt) |
8557760c | 57 | { |
d7c0a89a | 58 | *((uint16_t *)pnt) = htons(v); |
8557760c | 59 | } |
60 | ||
61 | /* type == RD_TYPE_AS */ | |
d7c0a89a | 62 | void decode_rd_as(uint8_t *pnt, struct rd_as *rd_as) |
8557760c | 63 | { |
d7c0a89a QY |
64 | rd_as->as = (uint16_t)*pnt++ << 8; |
65 | rd_as->as |= (uint16_t)*pnt++; | |
937652c6 | 66 | ptr_get_be32(pnt, &rd_as->val); |
8557760c | 67 | } |
68 | ||
69 | /* type == RD_TYPE_AS4 */ | |
d7c0a89a | 70 | void decode_rd_as4(uint8_t *pnt, struct rd_as *rd_as) |
8557760c | 71 | { |
937652c6 | 72 | pnt = ptr_get_be32(pnt, &rd_as->as); |
d7c0a89a QY |
73 | rd_as->val = ((uint16_t)*pnt++ << 8); |
74 | rd_as->val |= (uint16_t)*pnt; | |
8557760c | 75 | } |
76 | ||
77 | /* type == RD_TYPE_IP */ | |
d7c0a89a | 78 | void decode_rd_ip(uint8_t *pnt, struct rd_ip *rd_ip) |
8557760c | 79 | { |
d62a17ae | 80 | memcpy(&rd_ip->ip, pnt, 4); |
81 | pnt += 4; | |
8557760c | 82 | |
d7c0a89a QY |
83 | rd_ip->val = ((uint16_t)*pnt++ << 8); |
84 | rd_ip->val |= (uint16_t)*pnt; | |
8557760c | 85 | } |
86 | ||
87 | #if ENABLE_BGP_VNC | |
88 | /* type == RD_TYPE_VNC_ETH */ | |
d7c0a89a | 89 | void decode_rd_vnc_eth(uint8_t *pnt, struct rd_vnc_eth *rd_vnc_eth) |
8557760c | 90 | { |
d62a17ae | 91 | rd_vnc_eth->type = RD_TYPE_VNC_ETH; |
92 | rd_vnc_eth->local_nve_id = pnt[1]; | |
28328ea9 | 93 | memcpy(rd_vnc_eth->macaddr.octet, pnt + 2, ETH_ALEN); |
8557760c | 94 | } |
95 | #endif | |
96 | ||
d62a17ae | 97 | int str2prefix_rd(const char *str, struct prefix_rd *prd) |
8557760c | 98 | { |
d62a17ae | 99 | int ret; /* ret of called functions */ |
100 | int lret; /* local ret, of this func */ | |
101 | char *p; | |
102 | char *p2; | |
103 | struct stream *s = NULL; | |
104 | char *half = NULL; | |
105 | struct in_addr addr; | |
106 | ||
107 | s = stream_new(8); | |
108 | ||
109 | prd->family = AF_UNSPEC; | |
110 | prd->prefixlen = 64; | |
111 | ||
112 | lret = 0; | |
113 | p = strchr(str, ':'); | |
114 | if (!p) | |
115 | goto out; | |
116 | ||
117 | if (!all_digit(p + 1)) | |
118 | goto out; | |
119 | ||
120 | half = XMALLOC(MTYPE_TMP, (p - str) + 1); | |
121 | memcpy(half, str, (p - str)); | |
122 | half[p - str] = '\0'; | |
123 | ||
124 | p2 = strchr(str, '.'); | |
125 | ||
126 | if (!p2) { | |
127 | unsigned long as_val; | |
128 | ||
129 | if (!all_digit(half)) | |
130 | goto out; | |
131 | ||
132 | as_val = atol(half); | |
133 | if (as_val > 0xffff) { | |
134 | stream_putw(s, RD_TYPE_AS4); | |
135 | stream_putl(s, as_val); | |
136 | stream_putw(s, atol(p + 1)); | |
137 | } else { | |
138 | stream_putw(s, RD_TYPE_AS); | |
139 | stream_putw(s, as_val); | |
140 | stream_putl(s, atol(p + 1)); | |
141 | } | |
142 | } else { | |
143 | ret = inet_aton(half, &addr); | |
144 | if (!ret) | |
145 | goto out; | |
146 | ||
147 | stream_putw(s, RD_TYPE_IP); | |
148 | stream_put_in_addr(s, &addr); | |
149 | stream_putw(s, atol(p + 1)); | |
150 | } | |
151 | memcpy(prd->val, s->data, 8); | |
152 | lret = 1; | |
8557760c | 153 | |
154 | out: | |
d62a17ae | 155 | if (s) |
156 | stream_free(s); | |
157 | if (half) | |
158 | XFREE(MTYPE_TMP, half); | |
159 | return lret; | |
8557760c | 160 | } |
161 | ||
d62a17ae | 162 | char *prefix_rd2str(struct prefix_rd *prd, char *buf, size_t size) |
8557760c | 163 | { |
d7c0a89a QY |
164 | uint8_t *pnt; |
165 | uint16_t type; | |
d62a17ae | 166 | struct rd_as rd_as; |
167 | struct rd_ip rd_ip; | |
168 | ||
02d32439 | 169 | assert(size >= RD_ADDRSTRLEN); |
d62a17ae | 170 | |
171 | pnt = prd->val; | |
172 | ||
173 | type = decode_rd_type(pnt); | |
174 | ||
175 | if (type == RD_TYPE_AS) { | |
176 | decode_rd_as(pnt + 2, &rd_as); | |
177 | snprintf(buf, size, "%u:%d", rd_as.as, rd_as.val); | |
178 | return buf; | |
179 | } else if (type == RD_TYPE_AS4) { | |
180 | decode_rd_as4(pnt + 2, &rd_as); | |
181 | snprintf(buf, size, "%u:%d", rd_as.as, rd_as.val); | |
182 | return buf; | |
183 | } else if (type == RD_TYPE_IP) { | |
184 | decode_rd_ip(pnt + 2, &rd_ip); | |
185 | snprintf(buf, size, "%s:%d", inet_ntoa(rd_ip.ip), rd_ip.val); | |
186 | return buf; | |
187 | } | |
8557760c | 188 | #if ENABLE_BGP_VNC |
d62a17ae | 189 | else if (type == RD_TYPE_VNC_ETH) { |
190 | snprintf(buf, size, "LHI:%d, %02x:%02x:%02x:%02x:%02x:%02x", | |
191 | *(pnt + 1), /* LHI */ | |
192 | *(pnt + 2), /* MAC[0] */ | |
193 | *(pnt + 3), *(pnt + 4), *(pnt + 5), *(pnt + 6), | |
194 | *(pnt + 7)); | |
195 | ||
196 | return buf; | |
197 | } | |
8557760c | 198 | #endif |
02d32439 DS |
199 | |
200 | snprintf(buf, size, "Unknown Type: %d", type); | |
201 | return buf; | |
8557760c | 202 | } |
92708db6 | 203 | |
204 | void form_auto_rd(struct in_addr router_id, | |
205 | uint16_t rd_id, | |
206 | struct prefix_rd *prd) | |
207 | { | |
208 | char buf[100]; | |
209 | ||
210 | prd->family = AF_UNSPEC; | |
211 | prd->prefixlen = 64; | |
212 | sprintf(buf, "%s:%hu", inet_ntoa(router_id), rd_id); | |
24f8bd87 | 213 | (void)str2prefix_rd(buf, prd); |
92708db6 | 214 | } |