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