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 8a8621c2 2021-09-06 naddy #include <sys/types.h>
20 bd3d9e54 2021-09-05 stsp #include <ctype.h>
21 bd3d9e54 2021-09-05 stsp #include <stdio.h>
22 bd3d9e54 2021-09-05 stsp #include <stdlib.h>
23 bd3d9e54 2021-09-05 stsp #include <string.h>
25 bd3d9e54 2021-09-05 stsp #include "got_error.h"
26 bd3d9e54 2021-09-05 stsp #include "got_path.h"
28 bd3d9e54 2021-09-05 stsp #include "got_lib_gitproto.h"
30 bd3d9e54 2021-09-05 stsp #ifndef nitems
31 bd3d9e54 2021-09-05 stsp #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
34 bd3d9e54 2021-09-05 stsp static const struct got_error *
35 bd3d9e54 2021-09-05 stsp tokenize_refline(char **tokens, char *line, int len, int maxtokens)
37 bd3d9e54 2021-09-05 stsp const struct got_error *err = NULL;
39 bd3d9e54 2021-09-05 stsp size_t i, n = 0;
41 bd3d9e54 2021-09-05 stsp for (i = 0; i < maxtokens; i++)
42 bd3d9e54 2021-09-05 stsp tokens[i] = NULL;
44 bd3d9e54 2021-09-05 stsp for (i = 0; n < len && i < maxtokens; i++) {
45 bd3d9e54 2021-09-05 stsp while (isspace(*line)) {
50 bd3d9e54 2021-09-05 stsp while (*line != '\0' && n < len &&
51 bd3d9e54 2021-09-05 stsp (!isspace(*line) || i == maxtokens - 1)) {
55 bd3d9e54 2021-09-05 stsp tokens[i] = strndup(p, line - p);
56 bd3d9e54 2021-09-05 stsp if (tokens[i] == NULL) {
57 bd3d9e54 2021-09-05 stsp err = got_error_from_errno("strndup");
60 bd3d9e54 2021-09-05 stsp /* Skip \0 field-delimiter at end of token. */
61 bd3d9e54 2021-09-05 stsp while (line[0] == '\0' && n < len) {
67 bd3d9e54 2021-09-05 stsp err = got_error(GOT_ERR_BAD_PACKET);
71 bd3d9e54 2021-09-05 stsp for (j = 0; j < i; j++) {
72 bd3d9e54 2021-09-05 stsp free(tokens[j]);
73 bd3d9e54 2021-09-05 stsp tokens[j] = NULL;
79 bd3d9e54 2021-09-05 stsp const struct got_error *
80 bd3d9e54 2021-09-05 stsp got_gitproto_parse_refline(char **id_str, char **refname,
81 bd3d9e54 2021-09-05 stsp char **server_capabilities, char *line, int len)
83 bd3d9e54 2021-09-05 stsp const struct got_error *err = NULL;
84 bd3d9e54 2021-09-05 stsp char *tokens[3];
86 bd3d9e54 2021-09-05 stsp err = tokenize_refline(tokens, line, len, nitems(tokens));
90 bd3d9e54 2021-09-05 stsp if (tokens[0])
91 bd3d9e54 2021-09-05 stsp *id_str = tokens[0];
92 bd3d9e54 2021-09-05 stsp if (tokens[1])
93 bd3d9e54 2021-09-05 stsp *refname = tokens[1];
94 bd3d9e54 2021-09-05 stsp if (tokens[2]) {
96 bd3d9e54 2021-09-05 stsp *server_capabilities = tokens[2];
97 bd3d9e54 2021-09-05 stsp p = strrchr(*server_capabilities, '\n');
102 bd3d9e54 2021-09-05 stsp return NULL;
105 bd3d9e54 2021-09-05 stsp static const struct got_error *
106 bd3d9e54 2021-09-05 stsp match_capability(char **my_capabilities, const char *capa,
107 bd3d9e54 2021-09-05 stsp const struct got_capability *mycapa)
109 bd3d9e54 2021-09-05 stsp char *equalsign;
112 bd3d9e54 2021-09-05 stsp equalsign = strchr(capa, '=');
113 bd3d9e54 2021-09-05 stsp if (equalsign) {
114 bd3d9e54 2021-09-05 stsp if (strncmp(capa, mycapa->key, equalsign - capa) != 0)
115 bd3d9e54 2021-09-05 stsp return NULL;
117 bd3d9e54 2021-09-05 stsp if (strcmp(capa, mycapa->key) != 0)
118 bd3d9e54 2021-09-05 stsp return NULL;
121 bd3d9e54 2021-09-05 stsp if (asprintf(&s, "%s %s%s%s",
122 bd3d9e54 2021-09-05 stsp *my_capabilities != NULL ? *my_capabilities : "",
123 bd3d9e54 2021-09-05 stsp mycapa->key,
124 bd3d9e54 2021-09-05 stsp mycapa->value != NULL ? "=" : "",
125 e33e440b 2021-09-05 stsp mycapa->value != NULL ? mycapa->value : "") == -1)
126 bd3d9e54 2021-09-05 stsp return got_error_from_errno("asprintf");
128 bd3d9e54 2021-09-05 stsp free(*my_capabilities);
129 bd3d9e54 2021-09-05 stsp *my_capabilities = s;
130 bd3d9e54 2021-09-05 stsp return NULL;
133 bd3d9e54 2021-09-05 stsp static const struct got_error *
134 bd3d9e54 2021-09-05 stsp add_symref(struct got_pathlist_head *symrefs, char *capa)
136 bd3d9e54 2021-09-05 stsp const struct got_error *err = NULL;
137 bd3d9e54 2021-09-05 stsp char *colon, *name = NULL, *target = NULL;
139 bd3d9e54 2021-09-05 stsp /* Need at least "A:B" */
140 bd3d9e54 2021-09-05 stsp if (strlen(capa) < 3)
141 bd3d9e54 2021-09-05 stsp return NULL;
143 bd3d9e54 2021-09-05 stsp colon = strchr(capa, ':');
144 bd3d9e54 2021-09-05 stsp if (colon == NULL)
145 bd3d9e54 2021-09-05 stsp return NULL;
147 bd3d9e54 2021-09-05 stsp *colon = '\0';
148 bd3d9e54 2021-09-05 stsp name = strdup(capa);
149 bd3d9e54 2021-09-05 stsp if (name == NULL)
150 bd3d9e54 2021-09-05 stsp return got_error_from_errno("strdup");
152 bd3d9e54 2021-09-05 stsp target = strdup(colon + 1);
153 bd3d9e54 2021-09-05 stsp if (target == NULL) {
154 bd3d9e54 2021-09-05 stsp err = got_error_from_errno("strdup");
158 bd3d9e54 2021-09-05 stsp /* We can't validate the ref itself here. The main process will. */
159 bd3d9e54 2021-09-05 stsp err = got_pathlist_append(symrefs, name, target);
162 bd3d9e54 2021-09-05 stsp free(name);
163 bd3d9e54 2021-09-05 stsp free(target);
165 bd3d9e54 2021-09-05 stsp return err;
168 bd3d9e54 2021-09-05 stsp const struct got_error *
169 bd3d9e54 2021-09-05 stsp got_gitproto_match_capabilities(char **common_capabilities,
170 bd3d9e54 2021-09-05 stsp struct got_pathlist_head *symrefs, char *server_capabilities,
171 bd3d9e54 2021-09-05 stsp const struct got_capability my_capabilities[], size_t ncapa)
173 bd3d9e54 2021-09-05 stsp const struct got_error *err = NULL;
174 bd3d9e54 2021-09-05 stsp char *capa, *equalsign;
177 bd3d9e54 2021-09-05 stsp *common_capabilities = NULL;
179 bd3d9e54 2021-09-05 stsp capa = strsep(&server_capabilities, " ");
180 bd3d9e54 2021-09-05 stsp if (capa == NULL)
181 bd3d9e54 2021-09-05 stsp return NULL;
183 bd3d9e54 2021-09-05 stsp equalsign = strchr(capa, '=');
184 bd3d9e54 2021-09-05 stsp if (equalsign != NULL && symrefs != NULL &&
185 bd3d9e54 2021-09-05 stsp strncmp(capa, "symref", equalsign - capa) == 0) {
186 bd3d9e54 2021-09-05 stsp err = add_symref(symrefs, equalsign + 1);
192 bd3d9e54 2021-09-05 stsp for (i = 0; i < ncapa; i++) {
193 bd3d9e54 2021-09-05 stsp err = match_capability(common_capabilities,
194 bd3d9e54 2021-09-05 stsp capa, &my_capabilities[i]);
198 bd3d9e54 2021-09-05 stsp } while (capa);
200 bd3d9e54 2021-09-05 stsp if (*common_capabilities == NULL) {
201 bd3d9e54 2021-09-05 stsp *common_capabilities = strdup("");
202 bd3d9e54 2021-09-05 stsp if (*common_capabilities == NULL)
203 bd3d9e54 2021-09-05 stsp err = got_error_from_errno("strdup");
205 bd3d9e54 2021-09-05 stsp return err;