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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
ed0e57e3 DA |
2 | /* BGP community, large-community aliasing. |
3 | * | |
4 | * Copyright (C) 2021 Donatas Abraitis <donatas.abraitis@gmail.com> | |
ed0e57e3 DA |
5 | */ |
6 | ||
5b4f4e62 DL |
7 | #include "zebra.h" |
8 | ||
ed0e57e3 DA |
9 | #include "memory.h" |
10 | #include "lib/jhash.h" | |
f4dd8296 | 11 | #include "frrstr.h" |
ed0e57e3 DA |
12 | |
13 | #include "bgpd/bgpd.h" | |
14 | #include "bgpd/bgp_community_alias.h" | |
15 | ||
16 | static struct hash *bgp_ca_alias_hash; | |
17 | static struct hash *bgp_ca_community_hash; | |
18 | ||
19 | static unsigned int bgp_ca_community_hash_key(const void *p) | |
20 | { | |
21 | const struct community_alias *ca = p; | |
22 | ||
23 | return jhash(ca->community, sizeof(ca->community), 0); | |
24 | } | |
25 | ||
26 | static bool bgp_ca_community_hash_cmp(const void *p1, const void *p2) | |
27 | { | |
28 | const struct community_alias *ca1 = p1; | |
29 | const struct community_alias *ca2 = p2; | |
30 | ||
c975f1a5 | 31 | return (strcmp(ca1->community, ca2->community) == 0); |
ed0e57e3 DA |
32 | } |
33 | ||
34 | static unsigned int bgp_ca_alias_hash_key(const void *p) | |
35 | { | |
36 | const struct community_alias *ca = p; | |
37 | ||
38 | return jhash(ca->alias, sizeof(ca->alias), 0); | |
39 | } | |
40 | ||
41 | static bool bgp_ca_alias_hash_cmp(const void *p1, const void *p2) | |
42 | { | |
43 | const struct community_alias *ca1 = p1; | |
44 | const struct community_alias *ca2 = p2; | |
45 | ||
c975f1a5 | 46 | return (strcmp(ca1->alias, ca2->alias) == 0); |
ed0e57e3 DA |
47 | } |
48 | ||
49 | static void *bgp_community_alias_alloc(void *p) | |
50 | { | |
51 | const struct community_alias *ca = p; | |
52 | struct communtiy_alias *new; | |
53 | ||
54 | new = XCALLOC(MTYPE_COMMUNITY_ALIAS, sizeof(struct community_alias)); | |
55 | memcpy(new, ca, sizeof(struct community_alias)); | |
56 | ||
57 | return new; | |
58 | } | |
59 | ||
60 | void bgp_community_alias_init(void) | |
61 | { | |
62 | bgp_ca_community_hash = hash_create(bgp_ca_community_hash_key, | |
63 | bgp_ca_community_hash_cmp, | |
64 | "BGP community alias (community)"); | |
65 | bgp_ca_alias_hash = | |
66 | hash_create(bgp_ca_alias_hash_key, bgp_ca_alias_hash_cmp, | |
67 | "BGP community alias (alias)"); | |
68 | } | |
69 | ||
176d7bea DA |
70 | static void bgp_ca_free(void *ca) |
71 | { | |
72 | XFREE(MTYPE_COMMUNITY_ALIAS, ca); | |
73 | } | |
74 | ||
ed0e57e3 DA |
75 | void bgp_community_alias_finish(void) |
76 | { | |
d8bc11a5 DS |
77 | hash_clean_and_free(&bgp_ca_community_hash, bgp_ca_free); |
78 | hash_clean_and_free(&bgp_ca_alias_hash, bgp_ca_free); | |
ed0e57e3 DA |
79 | } |
80 | ||
81 | static void bgp_community_alias_show_iterator(struct hash_bucket *hb, | |
82 | struct vty *vty) | |
83 | { | |
84 | struct community_alias *ca = hb->data; | |
85 | ||
86 | vty_out(vty, "bgp community alias %s %s\n", ca->community, ca->alias); | |
87 | } | |
88 | ||
89 | int bgp_community_alias_write(struct vty *vty) | |
90 | { | |
91 | hash_iterate(bgp_ca_community_hash, | |
92 | (void (*)(struct hash_bucket *, | |
93 | void *))bgp_community_alias_show_iterator, | |
94 | vty); | |
95 | return 1; | |
96 | } | |
97 | ||
98 | void bgp_ca_community_insert(struct community_alias *ca) | |
99 | { | |
8e3aae66 | 100 | (void)hash_get(bgp_ca_community_hash, ca, bgp_community_alias_alloc); |
ed0e57e3 DA |
101 | } |
102 | ||
103 | void bgp_ca_alias_insert(struct community_alias *ca) | |
104 | { | |
8e3aae66 | 105 | (void)hash_get(bgp_ca_alias_hash, ca, bgp_community_alias_alloc); |
ed0e57e3 DA |
106 | } |
107 | ||
108 | void bgp_ca_community_delete(struct community_alias *ca) | |
109 | { | |
110 | struct community_alias *data = hash_release(bgp_ca_community_hash, ca); | |
111 | ||
112 | XFREE(MTYPE_COMMUNITY_ALIAS, data); | |
113 | } | |
114 | ||
115 | void bgp_ca_alias_delete(struct community_alias *ca) | |
116 | { | |
117 | struct community_alias *data = hash_release(bgp_ca_alias_hash, ca); | |
118 | ||
119 | XFREE(MTYPE_COMMUNITY_ALIAS, data); | |
120 | } | |
121 | ||
122 | struct community_alias *bgp_ca_community_lookup(struct community_alias *ca) | |
123 | { | |
124 | return hash_lookup(bgp_ca_community_hash, ca); | |
125 | } | |
126 | ||
127 | struct community_alias *bgp_ca_alias_lookup(struct community_alias *ca) | |
128 | { | |
129 | return hash_lookup(bgp_ca_alias_hash, ca); | |
130 | } | |
131 | ||
132 | const char *bgp_community2alias(char *community) | |
133 | { | |
134 | struct community_alias ca; | |
135 | struct community_alias *find; | |
136 | ||
137 | memset(&ca, 0, sizeof(ca)); | |
138 | strlcpy(ca.community, community, sizeof(ca.community)); | |
139 | ||
140 | find = bgp_ca_community_lookup(&ca); | |
141 | if (find) | |
142 | return find->alias; | |
143 | ||
144 | return community; | |
145 | } | |
b4ad2fae | 146 | |
f4dd8296 DA |
147 | const char *bgp_alias2community(char *alias) |
148 | { | |
149 | struct community_alias ca; | |
150 | struct community_alias *find; | |
151 | ||
152 | memset(&ca, 0, sizeof(ca)); | |
153 | strlcpy(ca.alias, alias, sizeof(ca.alias)); | |
154 | ||
155 | find = bgp_ca_alias_lookup(&ca); | |
156 | if (find) | |
157 | return find->community; | |
158 | ||
159 | return alias; | |
160 | } | |
161 | ||
162 | /* Communities structs have `->str` which is used | |
163 | * for vty outputs and extended BGP community lists | |
164 | * with regexp. | |
165 | * This is a helper to convert already aliased version | |
166 | * of communities into numerical-only format. | |
167 | */ | |
15bc6a40 | 168 | char *bgp_alias2community_str(const char *str) |
f4dd8296 DA |
169 | { |
170 | char **aliases; | |
15bc6a40 IR |
171 | char *comstr; |
172 | int num, i; | |
f4dd8296 DA |
173 | |
174 | frrstr_split(str, " ", &aliases, &num); | |
15bc6a40 | 175 | const char *communities[num]; |
f4dd8296 | 176 | |
15bc6a40 IR |
177 | for (i = 0; i < num; i++) |
178 | communities[i] = bgp_alias2community(aliases[i]); | |
179 | ||
180 | comstr = frrstr_join(communities, num, " "); | |
181 | ||
182 | for (i = 0; i < num; i++) | |
f4dd8296 | 183 | XFREE(MTYPE_TMP, aliases[i]); |
f4dd8296 DA |
184 | XFREE(MTYPE_TMP, aliases); |
185 | ||
15bc6a40 | 186 | return comstr; |
f4dd8296 DA |
187 | } |
188 | ||
b4ad2fae DS |
189 | static int bgp_community_alias_vector_walker(struct hash_bucket *bucket, |
190 | void *data) | |
191 | { | |
192 | vector *comps = data; | |
193 | struct community_alias *alias = bucket->data; | |
194 | ||
195 | vector_set(*comps, XSTRDUP(MTYPE_COMPLETION, alias->alias)); | |
196 | ||
197 | return 1; | |
198 | } | |
199 | ||
200 | static void bgp_community_alias_cmd_completion(vector comps, | |
201 | struct cmd_token *token) | |
202 | { | |
203 | hash_walk(bgp_ca_alias_hash, bgp_community_alias_vector_walker, &comps); | |
204 | } | |
205 | ||
206 | static const struct cmd_variable_handler community_alias_handlers[] = { | |
207 | {.varname = "alias_name", | |
208 | .completions = bgp_community_alias_cmd_completion}, | |
209 | {.tokenname = "ALIAS_NAME", | |
210 | .completions = bgp_community_alias_cmd_completion}, | |
211 | {.completions = NULL}}; | |
212 | ||
213 | void bgp_community_alias_command_completion_setup(void) | |
214 | { | |
215 | cmd_variable_handler_register(community_alias_handlers); | |
216 | } |