1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* BGP RD definitions for BGP-based VPNs (IP/EVPN)
* -- brought over from bgpd/bgp_mplsvpn.c
* Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
*
* This file is part of FRR.
*
* FRR is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* FRR is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with FRR; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include <zebra.h>
#include "command.h"
#include "log.h"
#include "prefix.h"
#include "memory.h"
#include "stream.h"
#include "filter.h"
#include "bgpd/bgpd.h"
#include "bgpd/bgp_rd.h"
#include "bgpd/bgp_attr.h"
#if ENABLE_BGP_VNC
#include "bgpd/rfapi/rfapi_backend.h"
#endif
u_int16_t decode_rd_type(u_char *pnt)
{
u_int16_t v;
v = ((u_int16_t)*pnt++ << 8);
#if ENABLE_BGP_VNC
/*
* VNC L2 stores LHI in lower byte, so omit it
*/
if (v != RD_TYPE_VNC_ETH)
v |= (u_int16_t)*pnt;
#else /* duplicate code for clarity */
v |= (u_int16_t)*pnt;
#endif
return v;
}
void encode_rd_type(u_int16_t v, u_char *pnt)
{
*((u_int16_t *)pnt) = htons(v);
}
/* type == RD_TYPE_AS */
void decode_rd_as(u_char *pnt, struct rd_as *rd_as)
{
rd_as->as = (u_int16_t)*pnt++ << 8;
rd_as->as |= (u_int16_t)*pnt++;
ptr_get_be32(pnt, &rd_as->val);
}
/* type == RD_TYPE_AS4 */
void decode_rd_as4(u_char *pnt, struct rd_as *rd_as)
{
pnt = ptr_get_be32(pnt, &rd_as->as);
rd_as->val = ((u_int16_t)*pnt++ << 8);
rd_as->val |= (u_int16_t)*pnt;
}
/* type == RD_TYPE_IP */
void decode_rd_ip(u_char *pnt, struct rd_ip *rd_ip)
{
memcpy(&rd_ip->ip, pnt, 4);
pnt += 4;
rd_ip->val = ((u_int16_t)*pnt++ << 8);
rd_ip->val |= (u_int16_t)*pnt;
}
#if ENABLE_BGP_VNC
/* type == RD_TYPE_VNC_ETH */
void decode_rd_vnc_eth(u_char *pnt, struct rd_vnc_eth *rd_vnc_eth)
{
rd_vnc_eth->type = RD_TYPE_VNC_ETH;
rd_vnc_eth->local_nve_id = pnt[1];
memcpy(rd_vnc_eth->macaddr.octet, pnt + 2, ETH_ALEN);
}
#endif
int str2prefix_rd(const char *str, struct prefix_rd *prd)
{
int ret; /* ret of called functions */
int lret; /* local ret, of this func */
char *p;
char *p2;
struct stream *s = NULL;
char *half = NULL;
struct in_addr addr;
s = stream_new(8);
prd->family = AF_UNSPEC;
prd->prefixlen = 64;
lret = 0;
p = strchr(str, ':');
if (!p)
goto out;
if (!all_digit(p + 1))
goto out;
half = XMALLOC(MTYPE_TMP, (p - str) + 1);
memcpy(half, str, (p - str));
half[p - str] = '\0';
p2 = strchr(str, '.');
if (!p2) {
unsigned long as_val;
if (!all_digit(half))
goto out;
as_val = atol(half);
if (as_val > 0xffff) {
stream_putw(s, RD_TYPE_AS4);
stream_putl(s, as_val);
stream_putw(s, atol(p + 1));
} else {
stream_putw(s, RD_TYPE_AS);
stream_putw(s, as_val);
stream_putl(s, atol(p + 1));
}
} else {
ret = inet_aton(half, &addr);
if (!ret)
goto out;
stream_putw(s, RD_TYPE_IP);
stream_put_in_addr(s, &addr);
stream_putw(s, atol(p + 1));
}
memcpy(prd->val, s->data, 8);
lret = 1;
out:
if (s)
stream_free(s);
if (half)
XFREE(MTYPE_TMP, half);
return lret;
}
char *prefix_rd2str(struct prefix_rd *prd, char *buf, size_t size)
{
u_char *pnt;
u_int16_t type;
struct rd_as rd_as;
struct rd_ip rd_ip;
if (size < RD_ADDRSTRLEN)
return NULL;
pnt = prd->val;
type = decode_rd_type(pnt);
if (type == RD_TYPE_AS) {
decode_rd_as(pnt + 2, &rd_as);
snprintf(buf, size, "%u:%d", rd_as.as, rd_as.val);
return buf;
} else if (type == RD_TYPE_AS4) {
decode_rd_as4(pnt + 2, &rd_as);
snprintf(buf, size, "%u:%d", rd_as.as, rd_as.val);
return buf;
} else if (type == RD_TYPE_IP) {
decode_rd_ip(pnt + 2, &rd_ip);
snprintf(buf, size, "%s:%d", inet_ntoa(rd_ip.ip), rd_ip.val);
return buf;
}
#if ENABLE_BGP_VNC
else if (type == RD_TYPE_VNC_ETH) {
snprintf(buf, size, "LHI:%d, %02x:%02x:%02x:%02x:%02x:%02x",
*(pnt + 1), /* LHI */
*(pnt + 2), /* MAC[0] */
*(pnt + 3), *(pnt + 4), *(pnt + 5), *(pnt + 6),
*(pnt + 7));
return buf;
}
#endif
return NULL;
}
|
