1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25 #include "curl_setup.h"
26
27 #ifndef CURL_DISABLE_DICT
28
29 #ifdef HAVE_NETINET_IN_H
30 #include <netinet/in.h>
31 #endif
32 #ifdef HAVE_NETDB_H
33 #include <netdb.h>
34 #endif
35 #ifdef HAVE_ARPA_INET_H
36 #include <arpa/inet.h>
37 #endif
38 #ifdef HAVE_NET_IF_H
39 #include <net/if.h>
40 #endif
41 #ifdef HAVE_SYS_IOCTL_H
42 #include <sys/ioctl.h>
43 #endif
44
45 #ifdef HAVE_SYS_PARAM_H
46 #include <sys/param.h>
47 #endif
48
49 #ifdef HAVE_SYS_SELECT_H
50 #include <sys/select.h>
51 #elif defined(HAVE_UNISTD_H)
52 #include <unistd.h>
53 #endif
54
55 #include "urldata.h"
56 #include <curl/curl.h>
57 #include "transfer.h"
58 #include "sendf.h"
59 #include "escape.h"
60 #include "progress.h"
61 #include "dict.h"
62 #include "curl_printf.h"
63 #include "strcase.h"
64 #include "curl_memory.h"
65 /* The last #include file should be: */
66 #include "memdebug.h"
67
68 /*
69 * Forward declarations.
70 */
71
72 static CURLcode dict_do(struct Curl_easy *data, bool *done);
73
74 /*
75 * DICT protocol handler.
76 */
77
78 const struct Curl_handler Curl_handler_dict = {
79 "DICT", /* scheme */
80 ZERO_NULL, /* setup_connection */
81 dict_do, /* do_it */
82 ZERO_NULL, /* done */
83 ZERO_NULL, /* do_more */
84 ZERO_NULL, /* connect_it */
85 ZERO_NULL, /* connecting */
86 ZERO_NULL, /* doing */
87 ZERO_NULL, /* proto_getsock */
88 ZERO_NULL, /* doing_getsock */
89 ZERO_NULL, /* domore_getsock */
90 ZERO_NULL, /* perform_getsock */
91 ZERO_NULL, /* disconnect */
92 ZERO_NULL, /* readwrite */
93 ZERO_NULL, /* connection_check */
94 ZERO_NULL, /* attach connection */
95 PORT_DICT, /* defport */
96 CURLPROTO_DICT, /* protocol */
97 CURLPROTO_DICT, /* family */
98 PROTOPT_NONE | PROTOPT_NOURLQUERY /* flags */
99 };
100
101 #define DYN_DICT_WORD 10000
unescape_word(const char * input)102 static char *unescape_word(const char *input)
103 {
104 struct dynbuf out;
105 const char *ptr;
106 CURLcode result = CURLE_OK;
107 Curl_dyn_init(&out, DYN_DICT_WORD);
108
109 /* According to RFC2229 section 2.2, these letters need to be escaped with
110 \[letter] */
111 for(ptr = input; *ptr; ptr++) {
112 char ch = *ptr;
113 if((ch <= 32) || (ch == 127) ||
114 (ch == '\'') || (ch == '\"') || (ch == '\\'))
115 result = Curl_dyn_addn(&out, "\\", 1);
116 if(!result)
117 result = Curl_dyn_addn(&out, ptr, 1);
118 if(result)
119 return NULL;
120 }
121 return Curl_dyn_ptr(&out);
122 }
123
124 /* sendf() sends formatted data to the server */
sendf(curl_socket_t sockfd,struct Curl_easy * data,const char * fmt,...)125 static CURLcode sendf(curl_socket_t sockfd, struct Curl_easy *data,
126 const char *fmt, ...)
127 {
128 ssize_t bytes_written;
129 size_t write_len;
130 CURLcode result = CURLE_OK;
131 char *s;
132 char *sptr;
133 va_list ap;
134 va_start(ap, fmt);
135 s = vaprintf(fmt, ap); /* returns an allocated string */
136 va_end(ap);
137 if(!s)
138 return CURLE_OUT_OF_MEMORY; /* failure */
139
140 bytes_written = 0;
141 write_len = strlen(s);
142 sptr = s;
143
144 for(;;) {
145 /* Write the buffer to the socket */
146 result = Curl_write(data, sockfd, sptr, write_len, &bytes_written);
147
148 if(result)
149 break;
150
151 Curl_debug(data, CURLINFO_DATA_OUT, sptr, (size_t)bytes_written);
152
153 if((size_t)bytes_written != write_len) {
154 /* if not all was written at once, we must advance the pointer, decrease
155 the size left and try again! */
156 write_len -= bytes_written;
157 sptr += bytes_written;
158 }
159 else
160 break;
161 }
162
163 free(s); /* free the output string */
164
165 return result;
166 }
167
dict_do(struct Curl_easy * data,bool * done)168 static CURLcode dict_do(struct Curl_easy *data, bool *done)
169 {
170 char *word;
171 char *eword = NULL;
172 char *ppath;
173 char *database = NULL;
174 char *strategy = NULL;
175 char *nthdef = NULL; /* This is not part of the protocol, but required
176 by RFC 2229 */
177 CURLcode result;
178 struct connectdata *conn = data->conn;
179 curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
180
181 char *path;
182
183 *done = TRUE; /* unconditionally */
184
185 /* url-decode path before further evaluation */
186 result = Curl_urldecode(data->state.up.path, 0, &path, NULL, REJECT_CTRL);
187 if(result)
188 return result;
189
190 if(strncasecompare(path, DICT_MATCH, sizeof(DICT_MATCH)-1) ||
191 strncasecompare(path, DICT_MATCH2, sizeof(DICT_MATCH2)-1) ||
192 strncasecompare(path, DICT_MATCH3, sizeof(DICT_MATCH3)-1)) {
193
194 word = strchr(path, ':');
195 if(word) {
196 word++;
197 database = strchr(word, ':');
198 if(database) {
199 *database++ = (char)0;
200 strategy = strchr(database, ':');
201 if(strategy) {
202 *strategy++ = (char)0;
203 nthdef = strchr(strategy, ':');
204 if(nthdef) {
205 *nthdef = (char)0;
206 }
207 }
208 }
209 }
210
211 if(!word || (*word == (char)0)) {
212 infof(data, "lookup word is missing");
213 word = (char *)"default";
214 }
215 if(!database || (*database == (char)0)) {
216 database = (char *)"!";
217 }
218 if(!strategy || (*strategy == (char)0)) {
219 strategy = (char *)".";
220 }
221
222 eword = unescape_word(word);
223 if(!eword) {
224 result = CURLE_OUT_OF_MEMORY;
225 goto error;
226 }
227
228 result = sendf(sockfd, data,
229 "CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
230 "MATCH "
231 "%s " /* database */
232 "%s " /* strategy */
233 "%s\r\n" /* word */
234 "QUIT\r\n",
235 database,
236 strategy,
237 eword);
238
239 if(result) {
240 failf(data, "Failed sending DICT request");
241 goto error;
242 }
243 Curl_setup_transfer(data, FIRSTSOCKET, -1, FALSE, -1); /* no upload */
244 }
245 else if(strncasecompare(path, DICT_DEFINE, sizeof(DICT_DEFINE)-1) ||
246 strncasecompare(path, DICT_DEFINE2, sizeof(DICT_DEFINE2)-1) ||
247 strncasecompare(path, DICT_DEFINE3, sizeof(DICT_DEFINE3)-1)) {
248
249 word = strchr(path, ':');
250 if(word) {
251 word++;
252 database = strchr(word, ':');
253 if(database) {
254 *database++ = (char)0;
255 nthdef = strchr(database, ':');
256 if(nthdef) {
257 *nthdef = (char)0;
258 }
259 }
260 }
261
262 if(!word || (*word == (char)0)) {
263 infof(data, "lookup word is missing");
264 word = (char *)"default";
265 }
266 if(!database || (*database == (char)0)) {
267 database = (char *)"!";
268 }
269
270 eword = unescape_word(word);
271 if(!eword) {
272 result = CURLE_OUT_OF_MEMORY;
273 goto error;
274 }
275
276 result = sendf(sockfd, data,
277 "CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
278 "DEFINE "
279 "%s " /* database */
280 "%s\r\n" /* word */
281 "QUIT\r\n",
282 database,
283 eword);
284
285 if(result) {
286 failf(data, "Failed sending DICT request");
287 goto error;
288 }
289 Curl_setup_transfer(data, FIRSTSOCKET, -1, FALSE, -1);
290 }
291 else {
292
293 ppath = strchr(path, '/');
294 if(ppath) {
295 int i;
296
297 ppath++;
298 for(i = 0; ppath[i]; i++) {
299 if(ppath[i] == ':')
300 ppath[i] = ' ';
301 }
302 result = sendf(sockfd, data,
303 "CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
304 "%s\r\n"
305 "QUIT\r\n", ppath);
306 if(result) {
307 failf(data, "Failed sending DICT request");
308 goto error;
309 }
310
311 Curl_setup_transfer(data, FIRSTSOCKET, -1, FALSE, -1);
312 }
313 }
314
315 error:
316 free(eword);
317 free(path);
318 return result;
319 }
320 #endif /* CURL_DISABLE_DICT */
321