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6a8f9482 TK |
1 | /* $Cambridge: exim/src/src/dcc.c,v 1.1 2008/01/17 13:03:35 tom Exp $ */ |
2 | ||
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
7 | /* Copyright (c) Wolfgang Breyha 2005-2008 | |
8 | * Vienna University Computer Center | |
9 | * wbreyha@gmx.net | |
10 | * License: GPL | |
11 | */ | |
12 | ||
13 | /* This patch is based on code from Tom Kistners exiscan (ACL integration) and | |
14 | * the DCC local_scan patch from Christopher Bodenstein */ | |
15 | ||
16 | /* Code for calling dccifd. Called from acl.c. */ | |
17 | ||
18 | #include "exim.h" | |
19 | #ifdef EXPERIMENTAL_DCC | |
20 | #include "dcc.h" | |
21 | #include "unistd.h" | |
22 | ||
23 | uschar dcc_header_str[256]; | |
24 | uschar dcc_result_str[256]; | |
25 | int dcc_ok = 0; | |
26 | int dcc_rc = 0; | |
27 | ||
28 | /* This function takes a file descriptor and a buffer as input and | |
29 | * returns either 0 for success or errno in case of error. */ | |
30 | ||
31 | int flushbuffer (int socket, uschar *buffer) | |
32 | { | |
33 | int retval, rsp; | |
34 | rsp = write(socket, buffer, Ustrlen(buffer)); | |
35 | DEBUG(D_acl) | |
36 | debug_printf("Result of the write() = %d\n", rsp); | |
37 | if(rsp < 0) | |
38 | { | |
39 | DEBUG(D_acl) | |
40 | debug_printf("Error writing buffer to socket: %s\n", strerror(errno)); | |
41 | retval = errno; | |
42 | } else { | |
43 | DEBUG(D_acl) | |
44 | debug_printf("Wrote buffer to socket:\n%s\n", buffer); | |
45 | retval = 0; | |
46 | } | |
47 | return retval; | |
48 | } | |
49 | ||
50 | int dcc_process(uschar **listptr) { | |
51 | int sep = 0; | |
52 | uschar *list = *listptr; | |
53 | uschar *user_name; | |
54 | uschar *body_begin; | |
55 | uschar user_name_buffer[128]; | |
56 | unsigned long mbox_size; | |
57 | FILE *data_file; | |
58 | int dcc_sock; | |
59 | uschar dcc_buffer[32600]; | |
60 | uschar *dcc_daemon_ip = US""; | |
61 | int dcc_daemon_port = 6276; | |
62 | uschar *dcc_request = US"header"; | |
63 | uschar *dcc_default_ip_option = US"127.0.0.1"; | |
64 | uschar *dcc_ip_option = US""; | |
65 | uschar *dcc_helo_option = US"localhost"; | |
66 | uschar *dcc_reject_message = US"Rejected by DCC"; | |
67 | ||
68 | /* from local_scan */ | |
69 | int i, j, k, c, retval, sockfd, servlen, resp, rcpt_count, portnr, line; | |
70 | struct sockaddr_un serv_addr; | |
71 | struct sockaddr_in serv_addr_in; | |
72 | struct hostent *ipaddress; | |
73 | uschar sockpath[128]; | |
74 | uschar sockip[40], client_ip[40]; | |
75 | uschar opts[128]; | |
76 | uschar rcpt[128], from[128]; | |
77 | uschar sendbuf[4096]; | |
78 | uschar recvbuf[4096]; | |
79 | uschar xhdr[256]; | |
80 | uschar dcc_return_text[1024]; | |
81 | uschar mbox_path[1024]; | |
82 | uschar message_subdir[2]; | |
83 | struct header_line *dcchdr; | |
84 | struct recipient_item *dcc_rcpt = recipients_list; | |
85 | int some; | |
86 | uschar *dcc_acl_options; | |
87 | uschar dcc_acl_options_buffer[10]; | |
88 | ||
89 | int offset, result; | |
90 | uschar *p,*q; | |
91 | int override = 0; | |
92 | time_t start; | |
93 | struct sockaddr_un server; | |
94 | #ifndef NO_POLL_H | |
95 | struct pollfd pollfd; | |
96 | #endif | |
97 | ||
98 | /* stop compiler warning */ | |
99 | result = result; | |
100 | ||
101 | /* grep 1st option */ | |
102 | if ((dcc_acl_options = string_nextinlist(&list, &sep, | |
103 | dcc_acl_options_buffer, | |
104 | sizeof(dcc_acl_options_buffer))) != NULL) | |
105 | { | |
106 | /* parse 1st option */ | |
107 | if ( (strcmpic(dcc_acl_options,US"false") == 0) || | |
108 | (Ustrcmp(dcc_acl_options,"0") == 0) ) { | |
109 | /* explicitly no matching */ | |
110 | return FAIL; | |
111 | }; | |
112 | ||
113 | /* special cases (match anything except empty) */ | |
114 | if ( (strcmpic(dcc_acl_options,US"true") == 0) || | |
115 | (Ustrcmp(dcc_acl_options,"*") == 0) || | |
116 | (Ustrcmp(dcc_acl_options,"1") == 0) ) { | |
117 | dcc_acl_options = dcc_acl_options; | |
118 | }; | |
119 | } | |
120 | else { | |
121 | /* empty means "don't match anything" */ | |
122 | return FAIL; | |
123 | }; | |
124 | ||
125 | sep = 0; | |
126 | ||
127 | /* if we scanned this message last time, just return */ | |
128 | if ( dcc_ok ) | |
129 | return dcc_rc; | |
130 | ||
131 | /* open the spooled body */ | |
132 | message_subdir[1] = '\0'; | |
133 | for (i = 0; i < 2; i++) { | |
134 | message_subdir[0] = (split_spool_directory == (i == 0))? message_id[5] : 0; | |
135 | sprintf(CS mbox_path, "%s/input/%s/%s-D", spool_directory, message_subdir, message_id); | |
136 | data_file = Ufopen(mbox_path,"rb"); | |
137 | if (data_file != NULL) | |
138 | break; | |
139 | }; | |
140 | ||
141 | if (data_file == NULL) { | |
142 | /* error while spooling */ | |
143 | log_write(0, LOG_MAIN|LOG_PANIC, | |
144 | "dcc acl condition: error while opening spool file"); | |
145 | return DEFER; | |
146 | }; | |
147 | ||
148 | /* Initialize the variables */ | |
149 | ||
150 | bzero(sockip,sizeof(sockip)); | |
151 | if (dccifd_address) { | |
152 | if (dccifd_address[0] == '/') | |
153 | Ustrncpy(sockpath, dccifd_address, sizeof(sockpath)); | |
154 | else | |
155 | if( sscanf(CS dccifd_address, "%s %u", sockip, portnr) != 2) { | |
156 | log_write(0, LOG_MAIN, | |
157 | "dcc acl condition: warning - invalid dccifd address: '%s'", dccifd_address); | |
158 | (void)fclose(data_file); | |
159 | return DEFER; | |
160 | } | |
161 | } | |
162 | ||
163 | /* opts is what we send as dccifd options - see man dccifd */ | |
164 | /* We don't support any other option than 'header' so just copy that */ | |
165 | bzero(opts,sizeof(opts)); | |
166 | Ustrncpy(opts, "header", sizeof(opts)-1); | |
167 | Ustrncpy(client_ip, dcc_ip_option, sizeof(client_ip)-1); | |
168 | /* If the dcc_client_ip is not provided use the | |
169 | * sender_host_address or 127.0.0.1 if it is NULL */ | |
170 | DEBUG(D_acl) | |
171 | debug_printf("my_ip_option = %s - client_ip = %s - sender_host_address = %s\n", dcc_ip_option, client_ip, sender_host_address); | |
172 | if(!(Ustrcmp(client_ip, ""))){ | |
173 | /* Do we have a sender_host_address or is it NULL? */ | |
174 | if(sender_host_address){ | |
175 | /* check if it is an ipv6 address */ | |
176 | if(Ustrchr(sender_host_address, ':')){ | |
177 | /* This is an IPv6 address | |
178 | * For the moment we will not use it, but use 127.0.0.1 instead */ | |
179 | DEBUG(D_acl) | |
180 | debug_printf("IPv6 address!\n"); | |
181 | Ustrncpy(client_ip, dcc_default_ip_option, sizeof(client_ip)-1); | |
182 | } else { | |
183 | Ustrncpy(client_ip, sender_host_address, sizeof(client_ip)-1); | |
184 | } | |
185 | } else { | |
186 | /* sender_host_address is NULL which means it comes from localhost */ | |
187 | Ustrncpy(client_ip, dcc_default_ip_option, sizeof(client_ip)-1); | |
188 | } | |
189 | } | |
190 | DEBUG(D_acl) | |
191 | debug_printf("Client IP: %s\n", client_ip); | |
192 | Ustrncpy(sockip, dcc_daemon_ip, sizeof(sockip)-1); | |
193 | /* strncat(opts, my_request, strlen(my_request)); */ | |
194 | Ustrcat(opts, "\n"); | |
195 | Ustrncat(opts, client_ip, sizeof(opts)-Ustrlen(opts)-1); | |
196 | Ustrncat(opts, "\nHELO ", sizeof(opts)-Ustrlen(opts)-1); | |
197 | Ustrncat(opts, dcc_helo_option, sizeof(opts)-Ustrlen(opts)-2); | |
198 | Ustrcat(opts, "\n"); | |
199 | ||
200 | /* initialize the other variables */ | |
201 | dcchdr = header_list; | |
202 | rcpt_count = 0; | |
203 | /* we set the default return value to DEFER */ | |
204 | retval = DEFER; | |
205 | ||
206 | bzero(sendbuf,sizeof(sendbuf)); | |
207 | bzero(xhdr,sizeof(xhdr)); | |
208 | bzero(rcpt,sizeof(rcpt)); | |
209 | bzero(from,sizeof(from)); | |
210 | ||
211 | Ustrncpy(from, sender_address, sizeof(from)); | |
212 | Ustrncat(from, "\n", sizeof(from)-Ustrlen(from)-1); | |
213 | ||
214 | /************************************** | |
215 | * Now creating the socket connection * | |
216 | **************************************/ | |
217 | ||
218 | /* If there is a dcc_daemon_ip, we use a tcp socket, otherwise a UNIX socket */ | |
219 | if(Ustrcmp(sockip, "")){ | |
220 | ipaddress = gethostbyname((char *)sockip); | |
221 | bzero((char *) &serv_addr_in, sizeof(serv_addr_in)); | |
222 | serv_addr_in.sin_family = AF_INET; | |
223 | bcopy((char *)ipaddress->h_addr, (char *)&serv_addr_in.sin_addr.s_addr, ipaddress->h_length); | |
224 | serv_addr_in.sin_port = htons(portnr); | |
225 | if ((sockfd = socket(AF_INET, SOCK_STREAM,0)) < 0){ | |
226 | DEBUG(D_acl) | |
227 | debug_printf("Creating socket failed: %s\n", strerror(errno)); | |
228 | log_write(0,LOG_REJECT,"Creating socket failed: %s\n", strerror(errno)); | |
229 | /* if we cannot create the socket, defer the mail */ | |
230 | (void)fclose(data_file); | |
231 | return retval; | |
232 | } | |
233 | /* Now connecting the socket (INET) */ | |
234 | if (connect(sockfd, (struct sockaddr *)&serv_addr_in, sizeof(serv_addr_in)) < 0){ | |
235 | DEBUG(D_acl) | |
236 | debug_printf("Connecting socket failed: %s\n", strerror(errno)); | |
237 | log_write(0,LOG_REJECT,"Connecting socket failed: %s\n", strerror(errno)); | |
238 | /* if we cannot contact the socket, defer the mail */ | |
239 | (void)fclose(data_file); | |
240 | return retval; | |
241 | } | |
242 | } else { | |
243 | /* connecting to the dccifd UNIX socket */ | |
244 | bzero((char *)&serv_addr,sizeof(serv_addr)); | |
245 | serv_addr.sun_family = AF_UNIX; | |
246 | Ustrcpy(serv_addr.sun_path, sockpath); | |
247 | servlen = Ustrlen(serv_addr.sun_path) + sizeof(serv_addr.sun_family); | |
248 | if ((sockfd = socket(AF_UNIX, SOCK_STREAM,0)) < 0){ | |
249 | DEBUG(D_acl) | |
250 | debug_printf("Creating socket failed: %s\n", strerror(errno)); | |
251 | log_write(0,LOG_REJECT,"Creating socket failed: %s\n", strerror(errno)); | |
252 | /* if we cannot create the socket, defer the mail */ | |
253 | (void)fclose(data_file); | |
254 | return retval; | |
255 | } | |
256 | /* Now connecting the socket (UNIX) */ | |
257 | if (connect(sockfd, (struct sockaddr *) &serv_addr, servlen) < 0){ | |
258 | DEBUG(D_acl) | |
259 | debug_printf("Connecting socket failed: %s\n", strerror(errno)); | |
260 | log_write(0,LOG_REJECT,"Connecting socket failed: %s\n", strerror(errno)); | |
261 | /* if we cannot contact the socket, defer the mail */ | |
262 | (void)fclose(data_file); | |
263 | return retval; | |
264 | } | |
265 | } | |
266 | /* the socket is open, now send the options to dccifd*/ | |
267 | DEBUG(D_acl) | |
268 | debug_printf("\n---------------------------\nSocket opened; now sending input\n-----------------\n"); | |
269 | /* First, fill in the input buffer */ | |
270 | Ustrncpy(sendbuf, opts, sizeof(sendbuf)); | |
271 | Ustrncat(sendbuf, from, sizeof(sendbuf)-Ustrlen(sendbuf)-1); | |
272 | ||
273 | DEBUG(D_acl) | |
274 | { | |
275 | debug_printf("opts = %s\nsender = %s\nrcpt count = %d\n", opts, from, recipients_count); | |
276 | debug_printf("Sending options:\n****************************\n"); | |
277 | } | |
278 | ||
279 | /* let's send each of the recipients to dccifd */ | |
280 | for (i = 0; i < recipients_count; i++){ | |
281 | DEBUG(D_acl) | |
282 | debug_printf("recipient = %s\n",recipients_list[i].address); | |
283 | if(Ustrlen(sendbuf) + Ustrlen(recipients_list[i].address) > sizeof(sendbuf)) | |
284 | { | |
285 | DEBUG(D_acl) | |
286 | debug_printf("Writing buffer: %s\n", sendbuf); | |
287 | flushbuffer(sockfd, sendbuf); | |
288 | bzero(sendbuf, sizeof(sendbuf)); | |
289 | } | |
290 | Ustrncat(sendbuf, recipients_list[i].address, sizeof(sendbuf)-Ustrlen(sendbuf)-1); | |
291 | Ustrncat(sendbuf, "\r\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); | |
292 | } | |
293 | /* send a blank line between options and message */ | |
294 | Ustrncat(sendbuf, "\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); | |
295 | /* Now we send the input buffer */ | |
296 | DEBUG(D_acl) | |
297 | debug_printf("%s\n****************************\n", sendbuf); | |
298 | flushbuffer(sockfd, sendbuf); | |
299 | ||
300 | /* now send the message */ | |
301 | /* Clear the input buffer */ | |
302 | bzero(sendbuf, sizeof(sendbuf)); | |
303 | /* First send the headers */ | |
304 | /* Now send the headers */ | |
305 | DEBUG(D_acl) | |
306 | debug_printf("Sending headers:\n****************************\n"); | |
307 | Ustrncpy(sendbuf, dcchdr->text, sizeof(sendbuf)-2); | |
308 | while((dcchdr=dcchdr->next)) { | |
309 | if(dcchdr->slen > sizeof(sendbuf)-2) { | |
310 | /* The size of the header is bigger than the size of | |
311 | * the input buffer, so split it up in smaller parts. */ | |
312 | flushbuffer(sockfd, sendbuf); | |
313 | bzero(sendbuf, sizeof(sendbuf)); | |
314 | j = 0; | |
315 | while(j < dcchdr->slen) | |
316 | { | |
317 | for(i = 0; i < sizeof(sendbuf)-2; i++) { | |
318 | sendbuf[i] = dcchdr->text[j]; | |
319 | j++; | |
320 | } | |
321 | flushbuffer(sockfd, sendbuf); | |
322 | bzero(sendbuf, sizeof(sendbuf)); | |
323 | } | |
324 | } else if(Ustrlen(sendbuf) + dcchdr->slen > sizeof(sendbuf)-2) { | |
325 | flushbuffer(sockfd, sendbuf); | |
326 | bzero(sendbuf, sizeof(sendbuf)); | |
327 | Ustrncpy(sendbuf, dcchdr->text, sizeof(sendbuf)-2); | |
328 | } else { | |
329 | Ustrncat(sendbuf, dcchdr->text, sizeof(sendbuf)-Ustrlen(sendbuf)-2); | |
330 | } | |
331 | } | |
332 | ||
333 | /* a blank line separates header from body */ | |
334 | Ustrncat(sendbuf, "\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); | |
335 | flushbuffer(sockfd, sendbuf); | |
336 | DEBUG(D_acl) | |
337 | debug_printf("\n****************************\n", sendbuf); | |
338 | ||
339 | /* Clear the input buffer */ | |
340 | bzero(sendbuf, sizeof(sendbuf)); | |
341 | ||
342 | /* now send the body */ | |
343 | DEBUG(D_acl) | |
344 | debug_printf("Writing body:\n****************************\n"); | |
345 | (void)fseek(data_file, SPOOL_DATA_START_OFFSET, SEEK_SET); | |
346 | while((fread(sendbuf, 1, sizeof(sendbuf)-1, data_file)) > 0) { | |
347 | flushbuffer(sockfd, sendbuf); | |
348 | bzero(sendbuf, sizeof(sendbuf)); | |
349 | } | |
350 | DEBUG(D_acl) | |
351 | debug_printf("\n****************************\n"); | |
352 | ||
353 | /* shutdown() the socket */ | |
354 | if(shutdown(sockfd, 1) < 0){ | |
355 | DEBUG(D_acl) | |
356 | debug_printf("Couldn't shutdown socket: %s\n", strerror(errno)); | |
357 | log_write(0,LOG_MAIN,"Couldn't shutdown socket: %s\n", strerror(errno)); | |
358 | /* If there is a problem with the shutdown() | |
359 | * defer the mail. */ | |
360 | (void)fclose(data_file); | |
361 | return retval; | |
362 | } | |
363 | DEBUG(D_acl) | |
364 | debug_printf("\n-------------------------\nInput sent.\n-------------------------\n"); | |
365 | ||
366 | /******************************** | |
367 | * receiving output from dccifd * | |
368 | ********************************/ | |
369 | DEBUG(D_acl) | |
370 | debug_printf("\n-------------------------------------\nNow receiving output from server\n-----------------------------------\n"); | |
371 | ||
372 | /****************************************************************** | |
373 | * We should get 3 lines: * | |
374 | * 1/ First line is overall result: either 'A' for Accept, * | |
375 | * 'R' for Reject, 'S' for accept Some recipients or * | |
376 | * 'T' for a Temporary error. * | |
377 | * 2/ Second line contains the list of Accepted/Rejected * | |
378 | * recipients in the form AARRA (A = accepted, R = rejected). * | |
379 | * 3/ Third line contains the X-DCC header. * | |
380 | ******************************************************************/ | |
381 | ||
382 | line = 1; /* we start at the first line of the output */ | |
383 | rcpt_count = 0; /* initializing the recipients counter */ | |
384 | j = 0; /* will be used as index for the recipients list */ | |
385 | k = 0; /* initializing the index of the X-DCC header: xhdr[k] */ | |
386 | some = 0; | |
387 | ||
388 | /* Let's read from the socket until there's nothing left to read */ | |
389 | bzero(recvbuf, sizeof(recvbuf)); | |
390 | while(resp = read(sockfd, recvbuf, sizeof(recvbuf)-1) > 0) { | |
391 | /* How much did we get from the socket */ | |
392 | c = Ustrlen(recvbuf) + 1; | |
393 | DEBUG(D_acl) | |
394 | debug_printf("Length of the output buffer is: %d\nOutput buffer is:\n------------\n%s\n-----------\n", c, recvbuf); | |
395 | ||
396 | /* Now let's read each character and see what we've got */ | |
397 | for(i = 0; i < c; i++) { | |
398 | /* First check if we reached the end of the line and | |
399 | * then increment the line counter */ | |
400 | if(recvbuf[i] == '\n') { | |
401 | line++; | |
402 | } | |
403 | else { | |
404 | /* The first character of the first line is the | |
405 | * overall response. If there's another character | |
406 | * on that line it is not correct. */ | |
407 | if(line == 1) { | |
408 | if(i == 0) { | |
409 | /* Now get the value and set the | |
410 | * return value accordingly */ | |
411 | if(recvbuf[i] == 'A') { | |
412 | DEBUG(D_acl) | |
413 | debug_printf("Overall result = A\treturning OK\n"); | |
414 | Ustrcpy(dcc_return_text, "Mail accepted by DCC"); | |
415 | retval = OK; | |
416 | } | |
417 | else if(recvbuf[i] == 'R') { | |
418 | DEBUG(D_acl) | |
419 | debug_printf("Overall result = R\treturning FAIL\n"); | |
420 | retval = FAIL; | |
421 | if(sender_host_name) { | |
422 | log_write(0, LOG_MAIN, "H=%s [%s] F=<%s>: rejected by DCC", sender_host_name, sender_host_address, sender_address); | |
423 | } | |
424 | else { | |
425 | log_write(0, LOG_MAIN, "H=[%s] F=<%s>: rejected by DCC", sender_host_address, sender_address); | |
426 | } | |
427 | Ustrncpy(dcc_return_text, dcc_reject_message, Ustrlen(dcc_reject_message) + 1); | |
428 | } | |
429 | else if(recvbuf[i] == 'S') { | |
430 | DEBUG(D_acl) | |
431 | debug_printf("Overall result = S\treturning OK\n"); | |
432 | Ustrcpy(dcc_return_text, "Not all recipients accepted by DCC"); | |
433 | some = 1; | |
434 | retval = OK; | |
435 | } | |
436 | else if(recvbuf[i] == 'G') { | |
437 | DEBUG(D_acl) | |
438 | debug_printf("Overall result = G\treturning FAIL\n"); | |
439 | Ustrcpy(dcc_return_text, "Greylisted by DCC"); | |
440 | retval = DEFER; | |
441 | } | |
442 | else if(recvbuf[i] == 'T') { | |
443 | DEBUG(D_acl) | |
444 | debug_printf("Overall result = T\treturning DEFER\n"); | |
445 | retval = DEFER; | |
446 | log_write(0,LOG_MAIN,"Temporary error with DCC: %s\n", recvbuf); | |
447 | Ustrcpy(dcc_return_text, "Temporary error with DCC"); | |
448 | } | |
449 | else { | |
450 | DEBUG(D_acl) | |
451 | debug_printf("Overall result = something else\treturning DEFER\n"); | |
452 | retval = DEFER; | |
453 | log_write(0,LOG_MAIN,"Unknown DCC response: %s\n", recvbuf); | |
454 | Ustrcpy(dcc_return_text, "Unknown DCC response"); | |
455 | } | |
456 | } | |
457 | else { | |
458 | /* We're on the first line but not on the first character, | |
459 | * there must be something wrong. */ | |
460 | DEBUG(D_acl) | |
461 | debug_printf("Line = %d but i = %d != 0 character is %c - This is wrong!\n", line, i, recvbuf[i]); | |
462 | log_write(0,LOG_MAIN,"Wrong header from DCC, output is %s\n", recvbuf); | |
463 | } | |
464 | } | |
465 | else if(line == 2) { | |
466 | /* On the second line we get a list of | |
467 | * answer for each recipient */ | |
468 | /* We only need to copy the list of recipients if we | |
469 | * accept the mail i.e. if retval is LOCAL_SCAN_ACCEPT */ | |
470 | // I don't care about results "SOME" since we're in the DATA stage. So we've a global result | |
471 | if(some) { | |
472 | if(j > recipients_count - 1) { | |
473 | DEBUG(D_acl) | |
474 | debug_printf("More recipients returned than sent!\nSent %d recipients, got %d in return.\n", recipients_count, j); | |
475 | } | |
476 | else { | |
477 | if(recvbuf[i] == 'A') { | |
478 | DEBUG(D_acl) | |
479 | debug_printf("Accepted recipient: %c - %s\n", recvbuf[i], recipients_list[j].address); | |
480 | // Ustrcpy(dcc_rcpt[rcpt_count].address, recipients_list[j].address); | |
481 | rcpt_count++; | |
482 | } | |
483 | else { | |
484 | DEBUG(D_acl) | |
485 | debug_printf("Rejected recipient: %c - %s\n", recvbuf[i], recipients_list[j].address); | |
486 | } | |
487 | j++; | |
488 | } | |
489 | } | |
490 | else { | |
491 | DEBUG(D_acl) | |
492 | debug_printf("result was not SOME, so we take the overall result\n"); | |
493 | } | |
494 | } | |
495 | else if(line > 2) { | |
496 | /* The third and following lines is the X-DCC header, | |
497 | * so we store it in xhdr. */ | |
498 | /* check if we don't get more than what we can handle */ | |
499 | if(k < sizeof(xhdr)) { /* xhdr has a length of 120 */ | |
500 | // DEBUG(D_acl) | |
501 | // debug_printf("Writing X-DCC header: k = %d recvbuf[%d] = %c\n", k, i, recvbuf[i]); | |
502 | xhdr[k] = recvbuf[i]; | |
503 | k++; | |
504 | } | |
505 | else { | |
506 | DEBUG(D_acl) | |
507 | debug_printf("We got more output than we can store in the X-DCC header. Truncating at 120 characters.\n"); | |
508 | } | |
509 | } | |
510 | else { | |
511 | /* Wrong line number. There must be a problem with the output. */ | |
512 | DEBUG(D_acl) | |
513 | debug_printf("Wrong line number in output. Line number is %d\n", line); | |
514 | } | |
515 | } | |
516 | } | |
517 | /* we reinitialize the output buffer before we read again */ | |
518 | bzero(recvbuf,sizeof(recvbuf)); | |
519 | } | |
520 | /* We have read everything from the socket */ | |
521 | ||
522 | /* We need the terminate the X-DCC header with a '\n' character. This needs to be k-1 | |
523 | * for xhdr[k] contains '\0'. */ | |
524 | xhdr[k-1] = '\n'; | |
525 | ||
526 | /* Now let's sum up what we've got. */ | |
527 | DEBUG(D_acl) | |
528 | debug_printf("\n--------------------------\nOverall result = %d\nNumber of recipients accepted: %d\nX-DCC header: %s\nReturn message: %s\n", retval, rcpt_count, xhdr, dcc_return_text); | |
529 | ||
530 | /* If some recipients were rejected, then rcpt_count is | |
531 | * less than the original recipients_count. | |
532 | * Then reconstruct the recipients list for those accepted | |
533 | * recipients only. */ | |
534 | if((rcpt_count == 0) & (retval == OK)) { /* There should be at least 1 recipient; but who knows... */ | |
535 | DEBUG(D_acl) | |
536 | debug_printf("List of accepted recipients is 0!\n"); | |
537 | retval = FAIL; | |
538 | } | |
539 | else { | |
540 | /* if(rcpt_count < recipients_count) { | |
541 | recipients_count=0; | |
542 | for(i=0; i < rcpt_count; i++){ | |
543 | DEBUG(D_acl) | |
544 | debug_printf("Adding the new recipient: %s\n", dcc_rcpt[i].address); | |
545 | receive_add_recipient(dcc_rcpt[i].address, -1); | |
546 | } */ | |
547 | retval = OK; | |
548 | } | |
549 | ||
550 | /* We only add the X-DCC header if it starts with X-DCC */ | |
551 | if(!(Ustrncmp(xhdr, "X-DCC", 5))){ | |
552 | dcc_header = xhdr; | |
553 | if(dcc_direct_add_header) { | |
554 | header_add(' ' , "%s", xhdr); | |
555 | /* since the MIME ACL already writes the .eml file to disk without DCC Header we've to earase it */ | |
556 | unspool_mbox(); | |
557 | } | |
558 | } | |
559 | else { | |
560 | DEBUG(D_acl) | |
561 | debug_printf("Wrong format of the X-DCC header: %s\n", xhdr); | |
562 | } | |
563 | ||
564 | dcc_ok = 1; | |
565 | /* Now return to exim main process */ | |
566 | DEBUG(D_acl) | |
567 | debug_printf("Before returning to exim main process:\nreturn_text = %s - retval = %d\n", dcc_return_text, retval); | |
568 | ||
569 | (void)fclose(data_file); | |
570 | return retval; | |
571 | } | |
572 | ||
573 | #endif |