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fb018d25 DS |
1 | /* A generic nexthop structure |
2 | * Copyright (C) 2013 Cumulus Networks, Inc. | |
3 | * | |
a399694f | 4 | * This file is part of Quagga. |
fb018d25 | 5 | * |
a399694f | 6 | * Quagga is free software; you can redistribute it and/or modify it |
fb018d25 DS |
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 | * | |
a399694f | 11 | * Quagga is distributed in the hope that it will be useful, but |
fb018d25 DS |
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 | |
a399694f | 17 | * along with Quagga; see the file COPYING. If not, write to the Free |
fb018d25 DS |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | #include <zebra.h> | |
22 | ||
23 | #include "prefix.h" | |
24 | #include "table.h" | |
25 | #include "memory.h" | |
26 | #include "str.h" | |
27 | #include "command.h" | |
28 | #include "if.h" | |
29 | #include "log.h" | |
30 | #include "sockunion.h" | |
31 | #include "linklist.h" | |
32 | #include "thread.h" | |
33 | #include "prefix.h" | |
34 | #include "nexthop.h" | |
40c7bdb0 | 35 | #include "mpls.h" |
fb018d25 | 36 | |
40c7bdb0 | 37 | DEFINE_MTYPE_STATIC(LIB, NEXTHOP, "Nexthop") |
38 | DEFINE_MTYPE_STATIC(LIB, NH_LABEL, "Nexthop label") | |
4a1ab8e4 | 39 | |
fb018d25 DS |
40 | /* check if nexthops are same, non-recursive */ |
41 | int | |
42 | nexthop_same_no_recurse (struct nexthop *next1, struct nexthop *next2) | |
43 | { | |
44 | if (next1->type != next2->type) | |
45 | return 0; | |
46 | ||
47 | switch (next1->type) | |
48 | { | |
49 | case NEXTHOP_TYPE_IPV4: | |
50 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
51 | if (! IPV4_ADDR_SAME (&next1->gate.ipv4, &next2->gate.ipv4)) | |
52 | return 0; | |
53 | if (next1->ifindex && (next1->ifindex != next2->ifindex)) | |
54 | return 0; | |
55 | break; | |
56 | case NEXTHOP_TYPE_IFINDEX: | |
fb018d25 DS |
57 | if (next1->ifindex != next2->ifindex) |
58 | return 0; | |
59 | break; | |
fb018d25 DS |
60 | case NEXTHOP_TYPE_IPV6: |
61 | if (! IPV6_ADDR_SAME (&next1->gate.ipv6, &next2->gate.ipv6)) | |
62 | return 0; | |
63 | break; | |
64 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
fb018d25 DS |
65 | if (! IPV6_ADDR_SAME (&next1->gate.ipv6, &next2->gate.ipv6)) |
66 | return 0; | |
67 | if (next1->ifindex != next2->ifindex) | |
68 | return 0; | |
69 | break; | |
fb018d25 DS |
70 | default: |
71 | /* do nothing */ | |
72 | break; | |
73 | } | |
74 | return 1; | |
75 | } | |
76 | ||
77 | /* | |
78 | * nexthop_type_to_str | |
79 | */ | |
80 | const char * | |
81 | nexthop_type_to_str (enum nexthop_types_t nh_type) | |
82 | { | |
83 | static const char *desc[] = { | |
84 | "none", | |
85 | "Directly connected", | |
86 | "Interface route", | |
87 | "IPv4 nexthop", | |
88 | "IPv4 nexthop with ifindex", | |
fb018d25 DS |
89 | "IPv6 nexthop", |
90 | "IPv6 nexthop with ifindex", | |
fb018d25 DS |
91 | "Null0 nexthop", |
92 | }; | |
93 | ||
fb018d25 DS |
94 | return desc[nh_type]; |
95 | } | |
a399694f DS |
96 | |
97 | struct nexthop * | |
98 | nexthop_new (void) | |
99 | { | |
100 | return XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
101 | } | |
102 | ||
103 | /* Add nexthop to the end of a nexthop list. */ | |
104 | void | |
105 | nexthop_add (struct nexthop **target, struct nexthop *nexthop) | |
106 | { | |
107 | struct nexthop *last; | |
108 | ||
109 | for (last = *target; last && last->next; last = last->next) | |
110 | ; | |
111 | if (last) | |
112 | last->next = nexthop; | |
113 | else | |
114 | *target = nexthop; | |
115 | nexthop->prev = last; | |
116 | } | |
117 | ||
118 | void | |
119 | copy_nexthops (struct nexthop **tnh, struct nexthop *nh) | |
120 | { | |
121 | struct nexthop *nexthop; | |
122 | struct nexthop *nh1; | |
123 | ||
124 | for (nh1 = nh; nh1; nh1 = nh1->next) | |
125 | { | |
126 | nexthop = nexthop_new(); | |
127 | nexthop->flags = nh->flags; | |
128 | nexthop->type = nh->type; | |
129 | nexthop->ifindex = nh->ifindex; | |
a399694f DS |
130 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); |
131 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
132 | nexthop_add(tnh, nexthop); | |
133 | ||
134 | if (CHECK_FLAG(nh1->flags, NEXTHOP_FLAG_RECURSIVE)) | |
135 | copy_nexthops(&nexthop->resolved, nh1->resolved); | |
136 | } | |
137 | } | |
138 | ||
139 | /* Free nexthop. */ | |
140 | void | |
141 | nexthop_free (struct nexthop *nexthop) | |
142 | { | |
40c7bdb0 | 143 | nexthop_del_labels (nexthop); |
a399694f DS |
144 | if (nexthop->resolved) |
145 | nexthops_free(nexthop->resolved); | |
146 | XFREE (MTYPE_NEXTHOP, nexthop); | |
147 | } | |
148 | ||
149 | /* Frees a list of nexthops */ | |
150 | void | |
151 | nexthops_free (struct nexthop *nexthop) | |
152 | { | |
153 | struct nexthop *nh, *next; | |
154 | ||
155 | for (nh = nexthop; nh; nh = next) | |
156 | { | |
157 | next = nh->next; | |
158 | nexthop_free (nh); | |
159 | } | |
160 | } | |
80c2442a | 161 | |
40c7bdb0 | 162 | /* Update nexthop with label information. */ |
163 | void | |
164 | nexthop_add_labels (struct nexthop *nexthop, u_int8_t num_labels, | |
165 | mpls_label_t *label) | |
166 | { | |
167 | struct nexthop_label *nh_label; | |
168 | int i; | |
169 | ||
170 | nh_label = XCALLOC (MTYPE_NH_LABEL, sizeof (struct nexthop_label)); | |
171 | nh_label->num_labels = num_labels; | |
172 | for (i = 0; i < num_labels; i++) | |
173 | nh_label->label[i] = *(label + i); | |
174 | nexthop->nh_label = nh_label; | |
175 | } | |
176 | ||
177 | /* Free label information of nexthop, if present. */ | |
178 | void | |
179 | nexthop_del_labels (struct nexthop *nexthop) | |
180 | { | |
181 | if (nexthop->nh_label) | |
182 | XFREE (MTYPE_NH_LABEL, nexthop->nh_label); | |
183 | } | |
184 | ||
80c2442a | 185 | const char * |
186 | nexthop2str (struct nexthop *nexthop, char *str, int size) | |
187 | { | |
188 | switch (nexthop->type) | |
189 | { | |
190 | case NEXTHOP_TYPE_IFINDEX: | |
191 | snprintf (str, size, "if %u", nexthop->ifindex); | |
192 | break; | |
193 | case NEXTHOP_TYPE_IPV4: | |
194 | snprintf (str, size, "%s", inet_ntoa (nexthop->gate.ipv4)); | |
195 | break; | |
196 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
197 | snprintf (str, size, "%s if %u", | |
198 | inet_ntoa (nexthop->gate.ipv4), nexthop->ifindex); | |
199 | break; | |
200 | case NEXTHOP_TYPE_IPV6: | |
201 | snprintf (str, size, "%s", inet6_ntoa (nexthop->gate.ipv6)); | |
202 | break; | |
203 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
204 | snprintf (str, size, "%s if %u", | |
205 | inet6_ntoa (nexthop->gate.ipv6), nexthop->ifindex); | |
206 | break; | |
207 | case NEXTHOP_TYPE_BLACKHOLE: | |
208 | snprintf (str, size, "blackhole"); | |
209 | break; | |
210 | default: | |
211 | snprintf (str, size, "unknown"); | |
212 | break; | |
213 | } | |
214 | ||
215 | return str; | |
216 | } |