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, /* write_resp */
93 ZERO_NULL, /* write_resp_hd */
94 ZERO_NULL, /* connection_check */
95 ZERO_NULL, /* attach connection */
96 PORT_DICT, /* defport */
97 CURLPROTO_DICT, /* protocol */
98 CURLPROTO_DICT, /* family */
99 PROTOPT_NONE | PROTOPT_NOURLQUERY /* flags */
100 };
101
102 #define DYN_DICT_WORD 10000
unescape_word(const char * input)103 static char *unescape_word(const char *input)
104 {
105 struct dynbuf out;
106 const char *ptr;
107 CURLcode result = CURLE_OK;
108 Curl_dyn_init(&out, DYN_DICT_WORD);
109
110 /* According to RFC2229 section 2.2, these letters need to be escaped with
111 \[letter] */
112 for(ptr = input; *ptr; ptr++) {
113 char ch = *ptr;
114 if((ch <= 32) || (ch == 127) ||
115 (ch == '\'') || (ch == '\"') || (ch == '\\'))
116 result = Curl_dyn_addn(&out, "\\", 1);
117 if(!result)
118 result = Curl_dyn_addn(&out, ptr, 1);
119 if(result)
120 return NULL;
121 }
122 return Curl_dyn_ptr(&out);
123 }
124
125 /* sendf() sends formatted data to the server */
126 static CURLcode sendf(struct Curl_easy *data,
127 const char *fmt, ...) CURL_PRINTF(2, 3);
128
sendf(struct Curl_easy * data,const char * fmt,...)129 static CURLcode sendf(struct Curl_easy *data, const char *fmt, ...)
130 {
131 size_t bytes_written;
132 size_t write_len;
133 CURLcode result = CURLE_OK;
134 char *s;
135 char *sptr;
136 va_list ap;
137 va_start(ap, fmt);
138 s = vaprintf(fmt, ap); /* returns an allocated string */
139 va_end(ap);
140 if(!s)
141 return CURLE_OUT_OF_MEMORY; /* failure */
142
143 bytes_written = 0;
144 write_len = strlen(s);
145 sptr = s;
146
147 for(;;) {
148 /* Write the buffer to the socket */
149 result = Curl_xfer_send(data, sptr, write_len, FALSE, &bytes_written);
150
151 if(result)
152 break;
153
154 Curl_debug(data, CURLINFO_DATA_OUT, sptr, (size_t)bytes_written);
155
156 if((size_t)bytes_written != write_len) {
157 /* if not all was written at once, we must advance the pointer, decrease
158 the size left and try again! */
159 write_len -= bytes_written;
160 sptr += bytes_written;
161 }
162 else
163 break;
164 }
165
166 free(s); /* free the output string */
167
168 return result;
169 }
170
dict_do(struct Curl_easy * data,bool * done)171 static CURLcode dict_do(struct Curl_easy *data, bool *done)
172 {
173 char *word;
174 char *eword = NULL;
175 char *ppath;
176 char *database = NULL;
177 char *strategy = NULL;
178 char *nthdef = NULL; /* This is not part of the protocol, but required
179 by RFC 2229 */
180 CURLcode result;
181
182 char *path;
183
184 *done = TRUE; /* unconditionally */
185
186 /* url-decode path before further evaluation */
187 result = Curl_urldecode(data->state.up.path, 0, &path, NULL, REJECT_CTRL);
188 if(result)
189 return result;
190
191 if(strncasecompare(path, DICT_MATCH, sizeof(DICT_MATCH)-1) ||
192 strncasecompare(path, DICT_MATCH2, sizeof(DICT_MATCH2)-1) ||
193 strncasecompare(path, DICT_MATCH3, sizeof(DICT_MATCH3)-1)) {
194
195 word = strchr(path, ':');
196 if(word) {
197 word++;
198 database = strchr(word, ':');
199 if(database) {
200 *database++ = (char)0;
201 strategy = strchr(database, ':');
202 if(strategy) {
203 *strategy++ = (char)0;
204 nthdef = strchr(strategy, ':');
205 if(nthdef) {
206 *nthdef = (char)0;
207 }
208 }
209 }
210 }
211
212 if(!word || (*word == (char)0)) {
213 infof(data, "lookup word is missing");
214 word = (char *)"default";
215 }
216 if(!database || (*database == (char)0)) {
217 database = (char *)"!";
218 }
219 if(!strategy || (*strategy == (char)0)) {
220 strategy = (char *)".";
221 }
222
223 eword = unescape_word(word);
224 if(!eword) {
225 result = CURLE_OUT_OF_MEMORY;
226 goto error;
227 }
228
229 result = sendf(data,
230 "CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
231 "MATCH "
232 "%s " /* database */
233 "%s " /* strategy */
234 "%s\r\n" /* word */
235 "QUIT\r\n",
236 database,
237 strategy,
238 eword);
239
240 if(result) {
241 failf(data, "Failed sending DICT request");
242 goto error;
243 }
244 Curl_xfer_setup1(data, CURL_XFER_RECV, -1, FALSE); /* no upload */
245 }
246 else if(strncasecompare(path, DICT_DEFINE, sizeof(DICT_DEFINE)-1) ||
247 strncasecompare(path, DICT_DEFINE2, sizeof(DICT_DEFINE2)-1) ||
248 strncasecompare(path, DICT_DEFINE3, sizeof(DICT_DEFINE3)-1)) {
249
250 word = strchr(path, ':');
251 if(word) {
252 word++;
253 database = strchr(word, ':');
254 if(database) {
255 *database++ = (char)0;
256 nthdef = strchr(database, ':');
257 if(nthdef) {
258 *nthdef = (char)0;
259 }
260 }
261 }
262
263 if(!word || (*word == (char)0)) {
264 infof(data, "lookup word is missing");
265 word = (char *)"default";
266 }
267 if(!database || (*database == (char)0)) {
268 database = (char *)"!";
269 }
270
271 eword = unescape_word(word);
272 if(!eword) {
273 result = CURLE_OUT_OF_MEMORY;
274 goto error;
275 }
276
277 result = sendf(data,
278 "CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
279 "DEFINE "
280 "%s " /* database */
281 "%s\r\n" /* word */
282 "QUIT\r\n",
283 database,
284 eword);
285
286 if(result) {
287 failf(data, "Failed sending DICT request");
288 goto error;
289 }
290 Curl_xfer_setup1(data, CURL_XFER_RECV, -1, FALSE);
291 }
292 else {
293
294 ppath = strchr(path, '/');
295 if(ppath) {
296 int i;
297
298 ppath++;
299 for(i = 0; ppath[i]; i++) {
300 if(ppath[i] == ':')
301 ppath[i] = ' ';
302 }
303 result = sendf(data,
304 "CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
305 "%s\r\n"
306 "QUIT\r\n", ppath);
307 if(result) {
308 failf(data, "Failed sending DICT request");
309 goto error;
310 }
311
312 Curl_xfer_setup1(data, CURL_XFER_RECV, -1, FALSE);
313 }
314 }
315
316 error:
317 free(eword);
318 free(path);
319 return result;
320 }
321 #endif /* CURL_DISABLE_DICT */
322
