2 bd3d9e54 2021-09-05 stsp * Copyright (c) 2019 Ori Bernstein <ori@openbsd.org>
3 bd3d9e54 2021-09-05 stsp * Copyright (c) 2021 Stefan Sperling <stsp@openbsd.org>
5 bd3d9e54 2021-09-05 stsp * Permission to use, copy, modify, and distribute this software for any
6 bd3d9e54 2021-09-05 stsp * purpose with or without fee is hereby granted, provided that the above
7 bd3d9e54 2021-09-05 stsp * copyright notice and this permission notice appear in all copies.
9 bd3d9e54 2021-09-05 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 bd3d9e54 2021-09-05 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 bd3d9e54 2021-09-05 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 bd3d9e54 2021-09-05 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 bd3d9e54 2021-09-05 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 bd3d9e54 2021-09-05 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 bd3d9e54 2021-09-05 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 bd3d9e54 2021-09-05 stsp #include <sys/queue.h>
19 8a8621c2 2021-09-06 naddy #include <sys/types.h>
21 bd3d9e54 2021-09-05 stsp #include <ctype.h>
22 bd3d9e54 2021-09-05 stsp #include <stdio.h>
23 bd3d9e54 2021-09-05 stsp #include <stdlib.h>
24 bd3d9e54 2021-09-05 stsp #include <string.h>
26 bd3d9e54 2021-09-05 stsp #include "got_error.h"
27 bd3d9e54 2021-09-05 stsp #include "got_path.h"
29 bd3d9e54 2021-09-05 stsp #include "got_lib_gitproto.h"
31 bd3d9e54 2021-09-05 stsp #ifndef nitems
32 bd3d9e54 2021-09-05 stsp #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
35 bd3d9e54 2021-09-05 stsp static const struct got_error *
36 bd3d9e54 2021-09-05 stsp tokenize_refline(char **tokens, char *line, int len, int maxtokens)
38 bd3d9e54 2021-09-05 stsp const struct got_error *err = NULL;
40 bd3d9e54 2021-09-05 stsp size_t i, n = 0;
42 bd3d9e54 2021-09-05 stsp for (i = 0; i < maxtokens; i++)
43 bd3d9e54 2021-09-05 stsp tokens[i] = NULL;
45 bd3d9e54 2021-09-05 stsp for (i = 0; n < len && i < maxtokens; i++) {
46 bd3d9e54 2021-09-05 stsp while (isspace(*line)) {
51 bd3d9e54 2021-09-05 stsp while (*line != '\0' && n < len &&
52 bd3d9e54 2021-09-05 stsp (!isspace(*line) || i == maxtokens - 1)) {
56 bd3d9e54 2021-09-05 stsp tokens[i] = strndup(p, line - p);
57 bd3d9e54 2021-09-05 stsp if (tokens[i] == NULL) {
58 bd3d9e54 2021-09-05 stsp err = got_error_from_errno("strndup");
61 bd3d9e54 2021-09-05 stsp /* Skip \0 field-delimiter at end of token. */
62 bd3d9e54 2021-09-05 stsp while (line[0] == '\0' && n < len) {
68 bd3d9e54 2021-09-05 stsp err = got_error(GOT_ERR_BAD_PACKET);
72 bd3d9e54 2021-09-05 stsp for (j = 0; j < i; j++) {
73 bd3d9e54 2021-09-05 stsp free(tokens[j]);
74 bd3d9e54 2021-09-05 stsp tokens[j] = NULL;
80 bd3d9e54 2021-09-05 stsp const struct got_error *
81 bd3d9e54 2021-09-05 stsp got_gitproto_parse_refline(char **id_str, char **refname,
82 bd3d9e54 2021-09-05 stsp char **server_capabilities, char *line, int len)
84 bd3d9e54 2021-09-05 stsp const struct got_error *err = NULL;
85 bd3d9e54 2021-09-05 stsp char *tokens[3];
87 bd3d9e54 2021-09-05 stsp err = tokenize_refline(tokens, line, len, nitems(tokens));
91 bd3d9e54 2021-09-05 stsp if (tokens[0])
92 bd3d9e54 2021-09-05 stsp *id_str = tokens[0];
93 bd3d9e54 2021-09-05 stsp if (tokens[1])
94 bd3d9e54 2021-09-05 stsp *refname = tokens[1];
95 bd3d9e54 2021-09-05 stsp if (tokens[2]) {
97 bd3d9e54 2021-09-05 stsp *server_capabilities = tokens[2];
98 bd3d9e54 2021-09-05 stsp p = strrchr(*server_capabilities, '\n');
103 bd3d9e54 2021-09-05 stsp return NULL;
106 bd3d9e54 2021-09-05 stsp static const struct got_error *
107 bd3d9e54 2021-09-05 stsp match_capability(char **my_capabilities, const char *capa,
108 bd3d9e54 2021-09-05 stsp const struct got_capability *mycapa)
110 bd3d9e54 2021-09-05 stsp char *equalsign;
113 bd3d9e54 2021-09-05 stsp equalsign = strchr(capa, '=');
114 bd3d9e54 2021-09-05 stsp if (equalsign) {
115 bd3d9e54 2021-09-05 stsp if (strncmp(capa, mycapa->key, equalsign - capa) != 0)
116 bd3d9e54 2021-09-05 stsp return NULL;
118 bd3d9e54 2021-09-05 stsp if (strcmp(capa, mycapa->key) != 0)
119 bd3d9e54 2021-09-05 stsp return NULL;
122 bd3d9e54 2021-09-05 stsp if (asprintf(&s, "%s %s%s%s",
123 bd3d9e54 2021-09-05 stsp *my_capabilities != NULL ? *my_capabilities : "",
124 bd3d9e54 2021-09-05 stsp mycapa->key,
125 bd3d9e54 2021-09-05 stsp mycapa->value != NULL ? "=" : "",
126 e33e440b 2021-09-05 stsp mycapa->value != NULL ? mycapa->value : "") == -1)
127 bd3d9e54 2021-09-05 stsp return got_error_from_errno("asprintf");
129 bd3d9e54 2021-09-05 stsp free(*my_capabilities);
130 bd3d9e54 2021-09-05 stsp *my_capabilities = s;
131 bd3d9e54 2021-09-05 stsp return NULL;
134 bd3d9e54 2021-09-05 stsp static const struct got_error *
135 bd3d9e54 2021-09-05 stsp add_symref(struct got_pathlist_head *symrefs, char *capa)
137 bd3d9e54 2021-09-05 stsp const struct got_error *err = NULL;
138 bd3d9e54 2021-09-05 stsp char *colon, *name = NULL, *target = NULL;
140 bd3d9e54 2021-09-05 stsp /* Need at least "A:B" */
141 bd3d9e54 2021-09-05 stsp if (strlen(capa) < 3)
142 bd3d9e54 2021-09-05 stsp return NULL;
144 bd3d9e54 2021-09-05 stsp colon = strchr(capa, ':');
145 bd3d9e54 2021-09-05 stsp if (colon == NULL)
146 bd3d9e54 2021-09-05 stsp return NULL;
148 bd3d9e54 2021-09-05 stsp *colon = '\0';
149 bd3d9e54 2021-09-05 stsp name = strdup(capa);
150 bd3d9e54 2021-09-05 stsp if (name == NULL)
151 bd3d9e54 2021-09-05 stsp return got_error_from_errno("strdup");
153 bd3d9e54 2021-09-05 stsp target = strdup(colon + 1);
154 bd3d9e54 2021-09-05 stsp if (target == NULL) {
155 bd3d9e54 2021-09-05 stsp err = got_error_from_errno("strdup");
159 bd3d9e54 2021-09-05 stsp /* We can't validate the ref itself here. The main process will. */
160 bd3d9e54 2021-09-05 stsp err = got_pathlist_append(symrefs, name, target);
163 bd3d9e54 2021-09-05 stsp free(name);
164 bd3d9e54 2021-09-05 stsp free(target);
166 bd3d9e54 2021-09-05 stsp return err;
169 bd3d9e54 2021-09-05 stsp const struct got_error *
170 bd3d9e54 2021-09-05 stsp got_gitproto_match_capabilities(char **common_capabilities,
171 bd3d9e54 2021-09-05 stsp struct got_pathlist_head *symrefs, char *server_capabilities,
172 bd3d9e54 2021-09-05 stsp const struct got_capability my_capabilities[], size_t ncapa)
174 bd3d9e54 2021-09-05 stsp const struct got_error *err = NULL;
175 bd3d9e54 2021-09-05 stsp char *capa, *equalsign;
178 bd3d9e54 2021-09-05 stsp *common_capabilities = NULL;
180 bd3d9e54 2021-09-05 stsp capa = strsep(&server_capabilities, " ");
181 bd3d9e54 2021-09-05 stsp if (capa == NULL)
182 bd3d9e54 2021-09-05 stsp return NULL;
184 bd3d9e54 2021-09-05 stsp equalsign = strchr(capa, '=');
185 bd3d9e54 2021-09-05 stsp if (equalsign != NULL && symrefs != NULL &&
186 bd3d9e54 2021-09-05 stsp strncmp(capa, "symref", equalsign - capa) == 0) {
187 bd3d9e54 2021-09-05 stsp err = add_symref(symrefs, equalsign + 1);
193 bd3d9e54 2021-09-05 stsp for (i = 0; i < ncapa; i++) {
194 bd3d9e54 2021-09-05 stsp err = match_capability(common_capabilities,
195 bd3d9e54 2021-09-05 stsp capa, &my_capabilities[i]);
199 bd3d9e54 2021-09-05 stsp } while (capa);
201 bd3d9e54 2021-09-05 stsp if (*common_capabilities == NULL) {
202 bd3d9e54 2021-09-05 stsp *common_capabilities = strdup("");
203 bd3d9e54 2021-09-05 stsp if (*common_capabilities == NULL)
204 bd3d9e54 2021-09-05 stsp err = got_error_from_errno("strdup");
206 bd3d9e54 2021-09-05 stsp return err;