Commit | Line | Data |
---|---|---|
6a8f9482 TK |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
3386088d | 5 | /* Copyright (c) Wolfgang Breyha 2005 - 2015 |
6a8f9482 TK |
6 | * Vienna University Computer Center |
7 | * wbreyha@gmx.net | |
b9e94344 | 8 | * See the file NOTICE for conditions of use and distribution. |
6a8f9482 TK |
9 | */ |
10 | ||
11 | /* This patch is based on code from Tom Kistners exiscan (ACL integration) and | |
12 | * the DCC local_scan patch from Christopher Bodenstein */ | |
13 | ||
14 | /* Code for calling dccifd. Called from acl.c. */ | |
15 | ||
16 | #include "exim.h" | |
17 | #ifdef EXPERIMENTAL_DCC | |
18 | #include "dcc.h" | |
19 | #include "unistd.h" | |
20 | ||
21 | uschar dcc_header_str[256]; | |
6a8f9482 TK |
22 | int dcc_ok = 0; |
23 | int dcc_rc = 0; | |
24 | ||
25 | /* This function takes a file descriptor and a buffer as input and | |
26 | * returns either 0 for success or errno in case of error. */ | |
27 | ||
28 | int flushbuffer (int socket, uschar *buffer) | |
29 | { | |
30 | int retval, rsp; | |
31 | rsp = write(socket, buffer, Ustrlen(buffer)); | |
32 | DEBUG(D_acl) | |
2369bf9c | 33 | debug_printf("DCC: Result of the write() = %d\n", rsp); |
6a8f9482 TK |
34 | if(rsp < 0) |
35 | { | |
36 | DEBUG(D_acl) | |
2369bf9c | 37 | debug_printf("DCC: Error writing buffer to socket: %s\n", strerror(errno)); |
6a8f9482 | 38 | retval = errno; |
05c39afa JH |
39 | } |
40 | else { | |
6a8f9482 | 41 | DEBUG(D_acl) |
2369bf9c | 42 | debug_printf("DCC: Wrote buffer to socket:\n%s\n", buffer); |
6a8f9482 TK |
43 | retval = 0; |
44 | } | |
45 | return retval; | |
46 | } | |
47 | ||
55414b25 JH |
48 | int |
49 | dcc_process(uschar **listptr) | |
50 | { | |
6a8f9482 | 51 | int sep = 0; |
55414b25 | 52 | const uschar *list = *listptr; |
6a8f9482 | 53 | FILE *data_file; |
6a8f9482 | 54 | uschar *dcc_default_ip_option = US"127.0.0.1"; |
6a8f9482 TK |
55 | uschar *dcc_helo_option = US"localhost"; |
56 | uschar *dcc_reject_message = US"Rejected by DCC"; | |
1a9312b2 | 57 | uschar *xtra_hdrs = NULL; |
05c39afa | 58 | uschar *override_client_ip = NULL; |
6a8f9482 TK |
59 | |
60 | /* from local_scan */ | |
e93a964c | 61 | int i, j, k, c, retval, sockfd, resp, line; |
7156b1ef | 62 | unsigned int portnr; |
6a8f9482 TK |
63 | struct sockaddr_un serv_addr; |
64 | struct sockaddr_in serv_addr_in; | |
65 | struct hostent *ipaddress; | |
66 | uschar sockpath[128]; | |
67 | uschar sockip[40], client_ip[40]; | |
68 | uschar opts[128]; | |
69 | uschar rcpt[128], from[128]; | |
70 | uschar sendbuf[4096]; | |
71 | uschar recvbuf[4096]; | |
6a8f9482 TK |
72 | uschar dcc_return_text[1024]; |
73 | uschar mbox_path[1024]; | |
74 | uschar message_subdir[2]; | |
75 | struct header_line *dcchdr; | |
6a8f9482 TK |
76 | uschar *dcc_acl_options; |
77 | uschar dcc_acl_options_buffer[10]; | |
1a9312b2 | 78 | uschar dcc_xtra_hdrs[1024]; |
6a8f9482 | 79 | |
6a8f9482 TK |
80 | /* grep 1st option */ |
81 | if ((dcc_acl_options = string_nextinlist(&list, &sep, | |
82 | dcc_acl_options_buffer, | |
83 | sizeof(dcc_acl_options_buffer))) != NULL) | |
84 | { | |
85 | /* parse 1st option */ | |
86 | if ( (strcmpic(dcc_acl_options,US"false") == 0) || | |
87 | (Ustrcmp(dcc_acl_options,"0") == 0) ) { | |
88 | /* explicitly no matching */ | |
89 | return FAIL; | |
90 | }; | |
91 | ||
92 | /* special cases (match anything except empty) */ | |
93 | if ( (strcmpic(dcc_acl_options,US"true") == 0) || | |
94 | (Ustrcmp(dcc_acl_options,"*") == 0) || | |
95 | (Ustrcmp(dcc_acl_options,"1") == 0) ) { | |
96 | dcc_acl_options = dcc_acl_options; | |
97 | }; | |
98 | } | |
99 | else { | |
100 | /* empty means "don't match anything" */ | |
101 | return FAIL; | |
102 | }; | |
103 | ||
104 | sep = 0; | |
105 | ||
106 | /* if we scanned this message last time, just return */ | |
107 | if ( dcc_ok ) | |
108 | return dcc_rc; | |
109 | ||
110 | /* open the spooled body */ | |
111 | message_subdir[1] = '\0'; | |
112 | for (i = 0; i < 2; i++) { | |
113 | message_subdir[0] = (split_spool_directory == (i == 0))? message_id[5] : 0; | |
114 | sprintf(CS mbox_path, "%s/input/%s/%s-D", spool_directory, message_subdir, message_id); | |
115 | data_file = Ufopen(mbox_path,"rb"); | |
116 | if (data_file != NULL) | |
117 | break; | |
118 | }; | |
119 | ||
120 | if (data_file == NULL) { | |
121 | /* error while spooling */ | |
122 | log_write(0, LOG_MAIN|LOG_PANIC, | |
123 | "dcc acl condition: error while opening spool file"); | |
124 | return DEFER; | |
125 | }; | |
126 | ||
127 | /* Initialize the variables */ | |
128 | ||
129 | bzero(sockip,sizeof(sockip)); | |
130 | if (dccifd_address) { | |
131 | if (dccifd_address[0] == '/') | |
132 | Ustrncpy(sockpath, dccifd_address, sizeof(sockpath)); | |
133 | else | |
7156b1ef | 134 | if( sscanf(CS dccifd_address, "%s %u", sockip, &portnr) != 2) { |
6a8f9482 TK |
135 | log_write(0, LOG_MAIN, |
136 | "dcc acl condition: warning - invalid dccifd address: '%s'", dccifd_address); | |
137 | (void)fclose(data_file); | |
138 | return DEFER; | |
139 | } | |
140 | } | |
141 | ||
142 | /* opts is what we send as dccifd options - see man dccifd */ | |
143 | /* We don't support any other option than 'header' so just copy that */ | |
144 | bzero(opts,sizeof(opts)); | |
05c39afa JH |
145 | Ustrncpy(opts, dccifd_options, sizeof(opts)-1); |
146 | /* if $acl_m_dcc_override_client_ip is set use it */ | |
94431adb | 147 | if (((override_client_ip = expand_string(US"$acl_m_dcc_override_client_ip")) != NULL) && |
05c39afa JH |
148 | (override_client_ip[0] != '\0')) { |
149 | Ustrncpy(client_ip, override_client_ip, sizeof(client_ip)-1); | |
150 | DEBUG(D_acl) | |
151 | debug_printf("DCC: Client IP (overridden): %s\n", client_ip); | |
94431adb | 152 | } |
05c39afa JH |
153 | else if(sender_host_address) { |
154 | /* else if $sender_host_address is available use that? */ | |
155 | Ustrncpy(client_ip, sender_host_address, sizeof(client_ip)-1); | |
156 | DEBUG(D_acl) | |
157 | debug_printf("DCC: Client IP (sender_host_address): %s\n", client_ip); | |
94431adb | 158 | } |
05c39afa JH |
159 | else { |
160 | /* sender_host_address is NULL which means it comes from localhost */ | |
161 | Ustrncpy(client_ip, dcc_default_ip_option, sizeof(client_ip)-1); | |
162 | DEBUG(D_acl) | |
163 | debug_printf("DCC: Client IP (default): %s\n", client_ip); | |
6a8f9482 | 164 | } |
6a8f9482 TK |
165 | /* strncat(opts, my_request, strlen(my_request)); */ |
166 | Ustrcat(opts, "\n"); | |
167 | Ustrncat(opts, client_ip, sizeof(opts)-Ustrlen(opts)-1); | |
168 | Ustrncat(opts, "\nHELO ", sizeof(opts)-Ustrlen(opts)-1); | |
169 | Ustrncat(opts, dcc_helo_option, sizeof(opts)-Ustrlen(opts)-2); | |
170 | Ustrcat(opts, "\n"); | |
171 | ||
172 | /* initialize the other variables */ | |
173 | dcchdr = header_list; | |
6a8f9482 TK |
174 | /* we set the default return value to DEFER */ |
175 | retval = DEFER; | |
176 | ||
177 | bzero(sendbuf,sizeof(sendbuf)); | |
7390e768 | 178 | bzero(dcc_header_str,sizeof(dcc_header_str)); |
6a8f9482 TK |
179 | bzero(rcpt,sizeof(rcpt)); |
180 | bzero(from,sizeof(from)); | |
181 | ||
1a9312b2 TK |
182 | /* send a null return path as "<>". */ |
183 | if (Ustrlen(sender_address) > 0) | |
184 | Ustrncpy(from, sender_address, sizeof(from)); | |
185 | else | |
186 | Ustrncpy(from, "<>", sizeof(from)); | |
6a8f9482 TK |
187 | Ustrncat(from, "\n", sizeof(from)-Ustrlen(from)-1); |
188 | ||
189 | /************************************** | |
190 | * Now creating the socket connection * | |
191 | **************************************/ | |
192 | ||
05c39afa | 193 | /* If sockip contains an ip, we use a tcp socket, otherwise a UNIX socket */ |
6a8f9482 TK |
194 | if(Ustrcmp(sockip, "")){ |
195 | ipaddress = gethostbyname((char *)sockip); | |
196 | bzero((char *) &serv_addr_in, sizeof(serv_addr_in)); | |
197 | serv_addr_in.sin_family = AF_INET; | |
198 | bcopy((char *)ipaddress->h_addr, (char *)&serv_addr_in.sin_addr.s_addr, ipaddress->h_length); | |
199 | serv_addr_in.sin_port = htons(portnr); | |
200 | if ((sockfd = socket(AF_INET, SOCK_STREAM,0)) < 0){ | |
201 | DEBUG(D_acl) | |
2369bf9c GF |
202 | debug_printf("DCC: Creating TCP socket connection failed: %s\n", strerror(errno)); |
203 | log_write(0,LOG_PANIC,"DCC: Creating TCP socket connection failed: %s\n", strerror(errno)); | |
6a8f9482 TK |
204 | /* if we cannot create the socket, defer the mail */ |
205 | (void)fclose(data_file); | |
206 | return retval; | |
207 | } | |
208 | /* Now connecting the socket (INET) */ | |
209 | if (connect(sockfd, (struct sockaddr *)&serv_addr_in, sizeof(serv_addr_in)) < 0){ | |
210 | DEBUG(D_acl) | |
2369bf9c GF |
211 | debug_printf("DCC: Connecting to TCP socket failed: %s\n", strerror(errno)); |
212 | log_write(0,LOG_PANIC,"DCC: Connecting to TCP socket failed: %s\n", strerror(errno)); | |
6a8f9482 TK |
213 | /* if we cannot contact the socket, defer the mail */ |
214 | (void)fclose(data_file); | |
215 | return retval; | |
216 | } | |
217 | } else { | |
218 | /* connecting to the dccifd UNIX socket */ | |
219 | bzero((char *)&serv_addr,sizeof(serv_addr)); | |
220 | serv_addr.sun_family = AF_UNIX; | |
221 | Ustrcpy(serv_addr.sun_path, sockpath); | |
6a8f9482 TK |
222 | if ((sockfd = socket(AF_UNIX, SOCK_STREAM,0)) < 0){ |
223 | DEBUG(D_acl) | |
2369bf9c GF |
224 | debug_printf("DCC: Creating UNIX socket connection failed: %s\n", strerror(errno)); |
225 | log_write(0,LOG_PANIC,"DCC: Creating UNIX socket connection failed: %s\n", strerror(errno)); | |
6a8f9482 TK |
226 | /* if we cannot create the socket, defer the mail */ |
227 | (void)fclose(data_file); | |
228 | return retval; | |
229 | } | |
230 | /* Now connecting the socket (UNIX) */ | |
e93a964c | 231 | if (connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0){ |
6a8f9482 | 232 | DEBUG(D_acl) |
2369bf9c GF |
233 | debug_printf("DCC: Connecting to UNIX socket failed: %s\n", strerror(errno)); |
234 | log_write(0,LOG_PANIC,"DCC: Connecting to UNIX socket failed: %s\n", strerror(errno)); | |
6a8f9482 TK |
235 | /* if we cannot contact the socket, defer the mail */ |
236 | (void)fclose(data_file); | |
237 | return retval; | |
238 | } | |
239 | } | |
240 | /* the socket is open, now send the options to dccifd*/ | |
241 | DEBUG(D_acl) | |
2369bf9c | 242 | debug_printf("\nDCC: ---------------------------\nDCC: Socket opened; now sending input\nDCC: -----------------\n"); |
6a8f9482 TK |
243 | /* First, fill in the input buffer */ |
244 | Ustrncpy(sendbuf, opts, sizeof(sendbuf)); | |
245 | Ustrncat(sendbuf, from, sizeof(sendbuf)-Ustrlen(sendbuf)-1); | |
246 | ||
247 | DEBUG(D_acl) | |
248 | { | |
2369bf9c GF |
249 | debug_printf("DCC: opts = %s\nDCC: sender = %s\nDCC: rcpt count = %d\n", opts, from, recipients_count); |
250 | debug_printf("DCC: Sending options:\nDCC: ****************************\n"); | |
6a8f9482 TK |
251 | } |
252 | ||
253 | /* let's send each of the recipients to dccifd */ | |
254 | for (i = 0; i < recipients_count; i++){ | |
255 | DEBUG(D_acl) | |
2369bf9c | 256 | debug_printf("DCC: recipient = %s\n",recipients_list[i].address); |
6a8f9482 TK |
257 | if(Ustrlen(sendbuf) + Ustrlen(recipients_list[i].address) > sizeof(sendbuf)) |
258 | { | |
259 | DEBUG(D_acl) | |
2369bf9c | 260 | debug_printf("DCC: Writing buffer: %s\n", sendbuf); |
6a8f9482 TK |
261 | flushbuffer(sockfd, sendbuf); |
262 | bzero(sendbuf, sizeof(sendbuf)); | |
263 | } | |
264 | Ustrncat(sendbuf, recipients_list[i].address, sizeof(sendbuf)-Ustrlen(sendbuf)-1); | |
265 | Ustrncat(sendbuf, "\r\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); | |
266 | } | |
267 | /* send a blank line between options and message */ | |
268 | Ustrncat(sendbuf, "\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); | |
269 | /* Now we send the input buffer */ | |
270 | DEBUG(D_acl) | |
2369bf9c | 271 | debug_printf("DCC: %s\nDCC: ****************************\n", sendbuf); |
6a8f9482 TK |
272 | flushbuffer(sockfd, sendbuf); |
273 | ||
274 | /* now send the message */ | |
275 | /* Clear the input buffer */ | |
276 | bzero(sendbuf, sizeof(sendbuf)); | |
277 | /* First send the headers */ | |
278 | /* Now send the headers */ | |
279 | DEBUG(D_acl) | |
2369bf9c | 280 | debug_printf("DCC: Sending headers:\nDCC: ****************************\n"); |
6a8f9482 TK |
281 | Ustrncpy(sendbuf, dcchdr->text, sizeof(sendbuf)-2); |
282 | while((dcchdr=dcchdr->next)) { | |
283 | if(dcchdr->slen > sizeof(sendbuf)-2) { | |
284 | /* The size of the header is bigger than the size of | |
285 | * the input buffer, so split it up in smaller parts. */ | |
286 | flushbuffer(sockfd, sendbuf); | |
287 | bzero(sendbuf, sizeof(sendbuf)); | |
288 | j = 0; | |
289 | while(j < dcchdr->slen) | |
290 | { | |
291 | for(i = 0; i < sizeof(sendbuf)-2; i++) { | |
292 | sendbuf[i] = dcchdr->text[j]; | |
293 | j++; | |
294 | } | |
295 | flushbuffer(sockfd, sendbuf); | |
296 | bzero(sendbuf, sizeof(sendbuf)); | |
297 | } | |
298 | } else if(Ustrlen(sendbuf) + dcchdr->slen > sizeof(sendbuf)-2) { | |
299 | flushbuffer(sockfd, sendbuf); | |
300 | bzero(sendbuf, sizeof(sendbuf)); | |
301 | Ustrncpy(sendbuf, dcchdr->text, sizeof(sendbuf)-2); | |
302 | } else { | |
303 | Ustrncat(sendbuf, dcchdr->text, sizeof(sendbuf)-Ustrlen(sendbuf)-2); | |
304 | } | |
305 | } | |
306 | ||
7390e768 | 307 | /* a blank line seperates header from body */ |
6a8f9482 TK |
308 | Ustrncat(sendbuf, "\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); |
309 | flushbuffer(sockfd, sendbuf); | |
310 | DEBUG(D_acl) | |
2369bf9c | 311 | debug_printf("\nDCC: ****************************\n%s", sendbuf); |
6a8f9482 TK |
312 | |
313 | /* Clear the input buffer */ | |
314 | bzero(sendbuf, sizeof(sendbuf)); | |
315 | ||
316 | /* now send the body */ | |
317 | DEBUG(D_acl) | |
2369bf9c | 318 | debug_printf("DCC: Writing body:\nDCC: ****************************\n"); |
6a8f9482 TK |
319 | (void)fseek(data_file, SPOOL_DATA_START_OFFSET, SEEK_SET); |
320 | while((fread(sendbuf, 1, sizeof(sendbuf)-1, data_file)) > 0) { | |
321 | flushbuffer(sockfd, sendbuf); | |
322 | bzero(sendbuf, sizeof(sendbuf)); | |
323 | } | |
324 | DEBUG(D_acl) | |
2369bf9c | 325 | debug_printf("\nDCC: ****************************\n"); |
6a8f9482 TK |
326 | |
327 | /* shutdown() the socket */ | |
328 | if(shutdown(sockfd, 1) < 0){ | |
329 | DEBUG(D_acl) | |
2369bf9c GF |
330 | debug_printf("DCC: Couldn't shutdown socket: %s\n", strerror(errno)); |
331 | log_write(0,LOG_MAIN,"DCC: Couldn't shutdown socket: %s\n", strerror(errno)); | |
6a8f9482 TK |
332 | /* If there is a problem with the shutdown() |
333 | * defer the mail. */ | |
334 | (void)fclose(data_file); | |
335 | return retval; | |
336 | } | |
337 | DEBUG(D_acl) | |
2369bf9c | 338 | debug_printf("\nDCC: -------------------------\nDCC: Input sent.\nDCC: -------------------------\n"); |
6a8f9482 TK |
339 | |
340 | /******************************** | |
341 | * receiving output from dccifd * | |
342 | ********************************/ | |
343 | DEBUG(D_acl) | |
2369bf9c | 344 | debug_printf("\nDCC: -------------------------------------\nDCC: Now receiving output from server\nDCC: -----------------------------------\n"); |
6a8f9482 TK |
345 | |
346 | /****************************************************************** | |
347 | * We should get 3 lines: * | |
348 | * 1/ First line is overall result: either 'A' for Accept, * | |
349 | * 'R' for Reject, 'S' for accept Some recipients or * | |
350 | * 'T' for a Temporary error. * | |
351 | * 2/ Second line contains the list of Accepted/Rejected * | |
352 | * recipients in the form AARRA (A = accepted, R = rejected). * | |
353 | * 3/ Third line contains the X-DCC header. * | |
354 | ******************************************************************/ | |
355 | ||
356 | line = 1; /* we start at the first line of the output */ | |
6a8f9482 | 357 | j = 0; /* will be used as index for the recipients list */ |
7390e768 | 358 | k = 0; /* initializing the index of the X-DCC header: dcc_header_str[k] */ |
6a8f9482 TK |
359 | |
360 | /* Let's read from the socket until there's nothing left to read */ | |
361 | bzero(recvbuf, sizeof(recvbuf)); | |
7156b1ef | 362 | while((resp = read(sockfd, recvbuf, sizeof(recvbuf)-1)) > 0) { |
6a8f9482 TK |
363 | /* How much did we get from the socket */ |
364 | c = Ustrlen(recvbuf) + 1; | |
365 | DEBUG(D_acl) | |
2369bf9c | 366 | debug_printf("DCC: Length of the output buffer is: %d\nDCC: Output buffer is:\nDCC: ------------\nDCC: %s\nDCC: -----------\n", c, recvbuf); |
6a8f9482 TK |
367 | |
368 | /* Now let's read each character and see what we've got */ | |
369 | for(i = 0; i < c; i++) { | |
370 | /* First check if we reached the end of the line and | |
371 | * then increment the line counter */ | |
372 | if(recvbuf[i] == '\n') { | |
373 | line++; | |
374 | } | |
375 | else { | |
376 | /* The first character of the first line is the | |
377 | * overall response. If there's another character | |
378 | * on that line it is not correct. */ | |
379 | if(line == 1) { | |
380 | if(i == 0) { | |
381 | /* Now get the value and set the | |
382 | * return value accordingly */ | |
383 | if(recvbuf[i] == 'A') { | |
384 | DEBUG(D_acl) | |
2369bf9c | 385 | debug_printf("DCC: Overall result = A\treturning OK\n"); |
6a8f9482 | 386 | Ustrcpy(dcc_return_text, "Mail accepted by DCC"); |
7156b1ef | 387 | dcc_result = US"A"; |
6a8f9482 TK |
388 | retval = OK; |
389 | } | |
390 | else if(recvbuf[i] == 'R') { | |
391 | DEBUG(D_acl) | |
2369bf9c | 392 | debug_printf("DCC: Overall result = R\treturning FAIL\n"); |
7156b1ef | 393 | dcc_result = US"R"; |
6a8f9482 TK |
394 | retval = FAIL; |
395 | if(sender_host_name) { | |
396 | log_write(0, LOG_MAIN, "H=%s [%s] F=<%s>: rejected by DCC", sender_host_name, sender_host_address, sender_address); | |
397 | } | |
398 | else { | |
399 | log_write(0, LOG_MAIN, "H=[%s] F=<%s>: rejected by DCC", sender_host_address, sender_address); | |
400 | } | |
401 | Ustrncpy(dcc_return_text, dcc_reject_message, Ustrlen(dcc_reject_message) + 1); | |
402 | } | |
403 | else if(recvbuf[i] == 'S') { | |
404 | DEBUG(D_acl) | |
2369bf9c | 405 | debug_printf("DCC: Overall result = S\treturning OK\n"); |
6a8f9482 | 406 | Ustrcpy(dcc_return_text, "Not all recipients accepted by DCC"); |
1a9312b2 TK |
407 | /* Since we're in an ACL we want a global result |
408 | * so we accept for all */ | |
7156b1ef | 409 | dcc_result = US"A"; |
6a8f9482 TK |
410 | retval = OK; |
411 | } | |
412 | else if(recvbuf[i] == 'G') { | |
413 | DEBUG(D_acl) | |
2369bf9c | 414 | debug_printf("DCC: Overall result = G\treturning FAIL\n"); |
6a8f9482 | 415 | Ustrcpy(dcc_return_text, "Greylisted by DCC"); |
7156b1ef | 416 | dcc_result = US"G"; |
1a9312b2 | 417 | retval = FAIL; |
6a8f9482 TK |
418 | } |
419 | else if(recvbuf[i] == 'T') { | |
420 | DEBUG(D_acl) | |
2369bf9c | 421 | debug_printf("DCC: Overall result = T\treturning DEFER\n"); |
6a8f9482 TK |
422 | retval = DEFER; |
423 | log_write(0,LOG_MAIN,"Temporary error with DCC: %s\n", recvbuf); | |
424 | Ustrcpy(dcc_return_text, "Temporary error with DCC"); | |
7156b1ef | 425 | dcc_result = US"T"; |
6a8f9482 TK |
426 | } |
427 | else { | |
428 | DEBUG(D_acl) | |
2369bf9c | 429 | debug_printf("DCC: Overall result = something else\treturning DEFER\n"); |
6a8f9482 TK |
430 | retval = DEFER; |
431 | log_write(0,LOG_MAIN,"Unknown DCC response: %s\n", recvbuf); | |
432 | Ustrcpy(dcc_return_text, "Unknown DCC response"); | |
7156b1ef | 433 | dcc_result = US"T"; |
6a8f9482 TK |
434 | } |
435 | } | |
436 | else { | |
437 | /* We're on the first line but not on the first character, | |
438 | * there must be something wrong. */ | |
439 | DEBUG(D_acl) | |
2369bf9c | 440 | debug_printf("DCC: Line = %d but i = %d != 0 character is %c - This is wrong!\n", line, i, recvbuf[i]); |
6a8f9482 TK |
441 | log_write(0,LOG_MAIN,"Wrong header from DCC, output is %s\n", recvbuf); |
442 | } | |
443 | } | |
444 | else if(line == 2) { | |
445 | /* On the second line we get a list of | |
7390e768 PP |
446 | * answers for each recipient. We don't care about |
447 | * it because we're in an acl and take the | |
1a9312b2 | 448 | * global result. */ |
6a8f9482 TK |
449 | } |
450 | else if(line > 2) { | |
7390e768 PP |
451 | /* The third and following lines are the X-DCC header, |
452 | * so we store it in dcc_header_str. */ | |
453 | /* check if we don't get more than we can handle */ | |
94431adb | 454 | if(k < sizeof(dcc_header_str)) { |
7390e768 | 455 | dcc_header_str[k] = recvbuf[i]; |
6a8f9482 TK |
456 | k++; |
457 | } | |
458 | else { | |
459 | DEBUG(D_acl) | |
2369bf9c | 460 | debug_printf("DCC: We got more output than we can store in the X-DCC header. Truncating at 120 characters.\n"); |
6a8f9482 TK |
461 | } |
462 | } | |
463 | else { | |
464 | /* Wrong line number. There must be a problem with the output. */ | |
465 | DEBUG(D_acl) | |
2369bf9c | 466 | debug_printf("DCC: Wrong line number in output. Line number is %d\n", line); |
6a8f9482 TK |
467 | } |
468 | } | |
469 | } | |
470 | /* we reinitialize the output buffer before we read again */ | |
471 | bzero(recvbuf,sizeof(recvbuf)); | |
472 | } | |
473 | /* We have read everything from the socket */ | |
474 | ||
7390e768 PP |
475 | /* We need to terminate the X-DCC header with a '\n' character. This needs to be k-1 |
476 | * since dcc_header_str[k] contains '\0'. */ | |
477 | dcc_header_str[k-1] = '\n'; | |
6a8f9482 TK |
478 | |
479 | /* Now let's sum up what we've got. */ | |
480 | DEBUG(D_acl) | |
2369bf9c | 481 | debug_printf("\nDCC: --------------------------\nDCC: Overall result = %d\nDCC: X-DCC header: %sReturn message: %s\nDCC: dcc_result: %s\n", retval, dcc_header_str, dcc_return_text, dcc_result); |
6a8f9482 TK |
482 | |
483 | /* We only add the X-DCC header if it starts with X-DCC */ | |
7390e768 PP |
484 | if(!(Ustrncmp(dcc_header_str, "X-DCC", 5))){ |
485 | dcc_header = dcc_header_str; | |
6a8f9482 | 486 | if(dcc_direct_add_header) { |
7390e768 | 487 | header_add(' ' , "%s", dcc_header_str); |
1a9312b2 | 488 | /* since the MIME ACL already writes the .eml file to disk without DCC Header we've to erase it */ |
6a8f9482 TK |
489 | unspool_mbox(); |
490 | } | |
491 | } | |
492 | else { | |
493 | DEBUG(D_acl) | |
2369bf9c | 494 | debug_printf("DCC: Wrong format of the X-DCC header: %s\n", dcc_header_str); |
6a8f9482 TK |
495 | } |
496 | ||
1a9312b2 TK |
497 | /* check if we should add additional headers passed in acl_m_dcc_add_header */ |
498 | if(dcc_direct_add_header) { | |
7156b1ef | 499 | if (((xtra_hdrs = expand_string(US"$acl_m_dcc_add_header")) != NULL) && (xtra_hdrs[0] != '\0')) { |
1a9312b2 TK |
500 | Ustrncpy(dcc_xtra_hdrs, xtra_hdrs, sizeof(dcc_xtra_hdrs) - 2); |
501 | if (dcc_xtra_hdrs[Ustrlen(dcc_xtra_hdrs)-1] != '\n') | |
502 | Ustrcat(dcc_xtra_hdrs, "\n"); | |
503 | header_add(' ', "%s", dcc_xtra_hdrs); | |
504 | DEBUG(D_acl) | |
2369bf9c | 505 | debug_printf("DCC: adding additional headers in $acl_m_dcc_add_header: %s", dcc_xtra_hdrs); |
1a9312b2 TK |
506 | } |
507 | } | |
508 | ||
6a8f9482 TK |
509 | dcc_ok = 1; |
510 | /* Now return to exim main process */ | |
511 | DEBUG(D_acl) | |
2369bf9c | 512 | debug_printf("DCC: Before returning to exim main process:\nDCC: return_text = %s - retval = %d\nDCC: dcc_result = %s\n", dcc_return_text, retval, dcc_result); |
6a8f9482 TK |
513 | |
514 | (void)fclose(data_file); | |
6f0c431a PP |
515 | dcc_rc = retval; |
516 | return dcc_rc; | |
6a8f9482 TK |
517 | } |
518 | ||
519 | #endif |