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, | |
dc8091e7 JH |
82 | dcc_acl_options_buffer, sizeof(dcc_acl_options_buffer)))) |
83 | { | |
6a8f9482 | 84 | /* parse 1st option */ |
dc8091e7 JH |
85 | if ( strcmpic(dcc_acl_options, US"false") == 0 |
86 | || Ustrcmp(dcc_acl_options, "0") == 0 | |
87 | ) | |
88 | return FAIL; /* explicitly no matching */ | |
89 | } | |
90 | else | |
91 | return FAIL; /* empty means "don't match anything" */ | |
6a8f9482 TK |
92 | |
93 | sep = 0; | |
94 | ||
95 | /* if we scanned this message last time, just return */ | |
dc8091e7 JH |
96 | if (dcc_ok) |
97 | return dcc_rc; | |
6a8f9482 TK |
98 | |
99 | /* open the spooled body */ | |
100 | message_subdir[1] = '\0'; | |
dc8091e7 JH |
101 | for (i = 0; i < 2; i++) |
102 | { | |
6a8f9482 TK |
103 | message_subdir[0] = (split_spool_directory == (i == 0))? message_id[5] : 0; |
104 | sprintf(CS mbox_path, "%s/input/%s/%s-D", spool_directory, message_subdir, message_id); | |
105 | data_file = Ufopen(mbox_path,"rb"); | |
106 | if (data_file != NULL) | |
107 | break; | |
dc8091e7 | 108 | } |
6a8f9482 | 109 | |
dc8091e7 JH |
110 | if (data_file == NULL) |
111 | { | |
6a8f9482 TK |
112 | /* error while spooling */ |
113 | log_write(0, LOG_MAIN|LOG_PANIC, | |
114 | "dcc acl condition: error while opening spool file"); | |
115 | return DEFER; | |
dc8091e7 | 116 | } |
6a8f9482 TK |
117 | |
118 | /* Initialize the variables */ | |
119 | ||
120 | bzero(sockip,sizeof(sockip)); | |
121 | if (dccifd_address) { | |
122 | if (dccifd_address[0] == '/') | |
123 | Ustrncpy(sockpath, dccifd_address, sizeof(sockpath)); | |
124 | else | |
7156b1ef | 125 | if( sscanf(CS dccifd_address, "%s %u", sockip, &portnr) != 2) { |
6a8f9482 TK |
126 | log_write(0, LOG_MAIN, |
127 | "dcc acl condition: warning - invalid dccifd address: '%s'", dccifd_address); | |
128 | (void)fclose(data_file); | |
129 | return DEFER; | |
130 | } | |
131 | } | |
132 | ||
133 | /* opts is what we send as dccifd options - see man dccifd */ | |
134 | /* We don't support any other option than 'header' so just copy that */ | |
135 | bzero(opts,sizeof(opts)); | |
05c39afa JH |
136 | Ustrncpy(opts, dccifd_options, sizeof(opts)-1); |
137 | /* if $acl_m_dcc_override_client_ip is set use it */ | |
94431adb | 138 | if (((override_client_ip = expand_string(US"$acl_m_dcc_override_client_ip")) != NULL) && |
05c39afa JH |
139 | (override_client_ip[0] != '\0')) { |
140 | Ustrncpy(client_ip, override_client_ip, sizeof(client_ip)-1); | |
141 | DEBUG(D_acl) | |
142 | debug_printf("DCC: Client IP (overridden): %s\n", client_ip); | |
94431adb | 143 | } |
05c39afa JH |
144 | else if(sender_host_address) { |
145 | /* else if $sender_host_address is available use that? */ | |
146 | Ustrncpy(client_ip, sender_host_address, sizeof(client_ip)-1); | |
147 | DEBUG(D_acl) | |
148 | debug_printf("DCC: Client IP (sender_host_address): %s\n", client_ip); | |
94431adb | 149 | } |
05c39afa JH |
150 | else { |
151 | /* sender_host_address is NULL which means it comes from localhost */ | |
152 | Ustrncpy(client_ip, dcc_default_ip_option, sizeof(client_ip)-1); | |
153 | DEBUG(D_acl) | |
154 | debug_printf("DCC: Client IP (default): %s\n", client_ip); | |
6a8f9482 | 155 | } |
6a8f9482 TK |
156 | /* strncat(opts, my_request, strlen(my_request)); */ |
157 | Ustrcat(opts, "\n"); | |
158 | Ustrncat(opts, client_ip, sizeof(opts)-Ustrlen(opts)-1); | |
159 | Ustrncat(opts, "\nHELO ", sizeof(opts)-Ustrlen(opts)-1); | |
160 | Ustrncat(opts, dcc_helo_option, sizeof(opts)-Ustrlen(opts)-2); | |
161 | Ustrcat(opts, "\n"); | |
162 | ||
163 | /* initialize the other variables */ | |
164 | dcchdr = header_list; | |
6a8f9482 TK |
165 | /* we set the default return value to DEFER */ |
166 | retval = DEFER; | |
167 | ||
168 | bzero(sendbuf,sizeof(sendbuf)); | |
7390e768 | 169 | bzero(dcc_header_str,sizeof(dcc_header_str)); |
6a8f9482 TK |
170 | bzero(rcpt,sizeof(rcpt)); |
171 | bzero(from,sizeof(from)); | |
172 | ||
1a9312b2 TK |
173 | /* send a null return path as "<>". */ |
174 | if (Ustrlen(sender_address) > 0) | |
175 | Ustrncpy(from, sender_address, sizeof(from)); | |
176 | else | |
177 | Ustrncpy(from, "<>", sizeof(from)); | |
6a8f9482 TK |
178 | Ustrncat(from, "\n", sizeof(from)-Ustrlen(from)-1); |
179 | ||
180 | /************************************** | |
181 | * Now creating the socket connection * | |
182 | **************************************/ | |
183 | ||
05c39afa | 184 | /* If sockip contains an ip, we use a tcp socket, otherwise a UNIX socket */ |
6a8f9482 TK |
185 | if(Ustrcmp(sockip, "")){ |
186 | ipaddress = gethostbyname((char *)sockip); | |
187 | bzero((char *) &serv_addr_in, sizeof(serv_addr_in)); | |
188 | serv_addr_in.sin_family = AF_INET; | |
189 | bcopy((char *)ipaddress->h_addr, (char *)&serv_addr_in.sin_addr.s_addr, ipaddress->h_length); | |
190 | serv_addr_in.sin_port = htons(portnr); | |
191 | if ((sockfd = socket(AF_INET, SOCK_STREAM,0)) < 0){ | |
192 | DEBUG(D_acl) | |
2369bf9c GF |
193 | debug_printf("DCC: Creating TCP socket connection failed: %s\n", strerror(errno)); |
194 | log_write(0,LOG_PANIC,"DCC: Creating TCP socket connection failed: %s\n", strerror(errno)); | |
6a8f9482 TK |
195 | /* if we cannot create the socket, defer the mail */ |
196 | (void)fclose(data_file); | |
197 | return retval; | |
198 | } | |
199 | /* Now connecting the socket (INET) */ | |
200 | if (connect(sockfd, (struct sockaddr *)&serv_addr_in, sizeof(serv_addr_in)) < 0){ | |
201 | DEBUG(D_acl) | |
2369bf9c GF |
202 | debug_printf("DCC: Connecting to TCP socket failed: %s\n", strerror(errno)); |
203 | log_write(0,LOG_PANIC,"DCC: Connecting to TCP socket failed: %s\n", strerror(errno)); | |
6a8f9482 TK |
204 | /* if we cannot contact the socket, defer the mail */ |
205 | (void)fclose(data_file); | |
206 | return retval; | |
207 | } | |
208 | } else { | |
209 | /* connecting to the dccifd UNIX socket */ | |
806c3df9 | 210 | bzero(&serv_addr, sizeof(serv_addr)); |
6a8f9482 | 211 | serv_addr.sun_family = AF_UNIX; |
806c3df9 | 212 | Ustrncpy(serv_addr.sun_path, sockpath, sizeof(serv_addr.sun_path)); |
6a8f9482 TK |
213 | if ((sockfd = socket(AF_UNIX, SOCK_STREAM,0)) < 0){ |
214 | DEBUG(D_acl) | |
2369bf9c GF |
215 | debug_printf("DCC: Creating UNIX socket connection failed: %s\n", strerror(errno)); |
216 | log_write(0,LOG_PANIC,"DCC: Creating UNIX socket connection failed: %s\n", strerror(errno)); | |
6a8f9482 TK |
217 | /* if we cannot create the socket, defer the mail */ |
218 | (void)fclose(data_file); | |
219 | return retval; | |
220 | } | |
221 | /* Now connecting the socket (UNIX) */ | |
e93a964c | 222 | if (connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0){ |
6a8f9482 | 223 | DEBUG(D_acl) |
2369bf9c GF |
224 | debug_printf("DCC: Connecting to UNIX socket failed: %s\n", strerror(errno)); |
225 | log_write(0,LOG_PANIC,"DCC: Connecting to UNIX socket failed: %s\n", strerror(errno)); | |
6a8f9482 TK |
226 | /* if we cannot contact the socket, defer the mail */ |
227 | (void)fclose(data_file); | |
228 | return retval; | |
229 | } | |
230 | } | |
231 | /* the socket is open, now send the options to dccifd*/ | |
232 | DEBUG(D_acl) | |
2369bf9c | 233 | debug_printf("\nDCC: ---------------------------\nDCC: Socket opened; now sending input\nDCC: -----------------\n"); |
6a8f9482 TK |
234 | /* First, fill in the input buffer */ |
235 | Ustrncpy(sendbuf, opts, sizeof(sendbuf)); | |
236 | Ustrncat(sendbuf, from, sizeof(sendbuf)-Ustrlen(sendbuf)-1); | |
237 | ||
238 | DEBUG(D_acl) | |
239 | { | |
2369bf9c GF |
240 | debug_printf("DCC: opts = %s\nDCC: sender = %s\nDCC: rcpt count = %d\n", opts, from, recipients_count); |
241 | debug_printf("DCC: Sending options:\nDCC: ****************************\n"); | |
6a8f9482 TK |
242 | } |
243 | ||
244 | /* let's send each of the recipients to dccifd */ | |
245 | for (i = 0; i < recipients_count; i++){ | |
246 | DEBUG(D_acl) | |
2369bf9c | 247 | debug_printf("DCC: recipient = %s\n",recipients_list[i].address); |
6a8f9482 TK |
248 | if(Ustrlen(sendbuf) + Ustrlen(recipients_list[i].address) > sizeof(sendbuf)) |
249 | { | |
250 | DEBUG(D_acl) | |
2369bf9c | 251 | debug_printf("DCC: Writing buffer: %s\n", sendbuf); |
6a8f9482 TK |
252 | flushbuffer(sockfd, sendbuf); |
253 | bzero(sendbuf, sizeof(sendbuf)); | |
254 | } | |
255 | Ustrncat(sendbuf, recipients_list[i].address, sizeof(sendbuf)-Ustrlen(sendbuf)-1); | |
256 | Ustrncat(sendbuf, "\r\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); | |
257 | } | |
258 | /* send a blank line between options and message */ | |
259 | Ustrncat(sendbuf, "\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); | |
260 | /* Now we send the input buffer */ | |
261 | DEBUG(D_acl) | |
2369bf9c | 262 | debug_printf("DCC: %s\nDCC: ****************************\n", sendbuf); |
6a8f9482 TK |
263 | flushbuffer(sockfd, sendbuf); |
264 | ||
265 | /* now send the message */ | |
266 | /* Clear the input buffer */ | |
267 | bzero(sendbuf, sizeof(sendbuf)); | |
268 | /* First send the headers */ | |
269 | /* Now send the headers */ | |
270 | DEBUG(D_acl) | |
2369bf9c | 271 | debug_printf("DCC: Sending headers:\nDCC: ****************************\n"); |
6a8f9482 TK |
272 | Ustrncpy(sendbuf, dcchdr->text, sizeof(sendbuf)-2); |
273 | while((dcchdr=dcchdr->next)) { | |
274 | if(dcchdr->slen > sizeof(sendbuf)-2) { | |
275 | /* The size of the header is bigger than the size of | |
276 | * the input buffer, so split it up in smaller parts. */ | |
277 | flushbuffer(sockfd, sendbuf); | |
278 | bzero(sendbuf, sizeof(sendbuf)); | |
279 | j = 0; | |
280 | while(j < dcchdr->slen) | |
281 | { | |
282 | for(i = 0; i < sizeof(sendbuf)-2; i++) { | |
283 | sendbuf[i] = dcchdr->text[j]; | |
284 | j++; | |
285 | } | |
286 | flushbuffer(sockfd, sendbuf); | |
287 | bzero(sendbuf, sizeof(sendbuf)); | |
288 | } | |
289 | } else if(Ustrlen(sendbuf) + dcchdr->slen > sizeof(sendbuf)-2) { | |
290 | flushbuffer(sockfd, sendbuf); | |
291 | bzero(sendbuf, sizeof(sendbuf)); | |
292 | Ustrncpy(sendbuf, dcchdr->text, sizeof(sendbuf)-2); | |
293 | } else { | |
294 | Ustrncat(sendbuf, dcchdr->text, sizeof(sendbuf)-Ustrlen(sendbuf)-2); | |
295 | } | |
296 | } | |
297 | ||
7390e768 | 298 | /* a blank line seperates header from body */ |
6a8f9482 TK |
299 | Ustrncat(sendbuf, "\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); |
300 | flushbuffer(sockfd, sendbuf); | |
301 | DEBUG(D_acl) | |
2369bf9c | 302 | debug_printf("\nDCC: ****************************\n%s", sendbuf); |
6a8f9482 TK |
303 | |
304 | /* Clear the input buffer */ | |
305 | bzero(sendbuf, sizeof(sendbuf)); | |
306 | ||
307 | /* now send the body */ | |
308 | DEBUG(D_acl) | |
2369bf9c | 309 | debug_printf("DCC: Writing body:\nDCC: ****************************\n"); |
6a8f9482 TK |
310 | (void)fseek(data_file, SPOOL_DATA_START_OFFSET, SEEK_SET); |
311 | while((fread(sendbuf, 1, sizeof(sendbuf)-1, data_file)) > 0) { | |
312 | flushbuffer(sockfd, sendbuf); | |
313 | bzero(sendbuf, sizeof(sendbuf)); | |
314 | } | |
315 | DEBUG(D_acl) | |
2369bf9c | 316 | debug_printf("\nDCC: ****************************\n"); |
6a8f9482 TK |
317 | |
318 | /* shutdown() the socket */ | |
319 | if(shutdown(sockfd, 1) < 0){ | |
320 | DEBUG(D_acl) | |
2369bf9c GF |
321 | debug_printf("DCC: Couldn't shutdown socket: %s\n", strerror(errno)); |
322 | log_write(0,LOG_MAIN,"DCC: Couldn't shutdown socket: %s\n", strerror(errno)); | |
6a8f9482 TK |
323 | /* If there is a problem with the shutdown() |
324 | * defer the mail. */ | |
325 | (void)fclose(data_file); | |
326 | return retval; | |
327 | } | |
328 | DEBUG(D_acl) | |
2369bf9c | 329 | debug_printf("\nDCC: -------------------------\nDCC: Input sent.\nDCC: -------------------------\n"); |
6a8f9482 TK |
330 | |
331 | /******************************** | |
332 | * receiving output from dccifd * | |
333 | ********************************/ | |
334 | DEBUG(D_acl) | |
2369bf9c | 335 | debug_printf("\nDCC: -------------------------------------\nDCC: Now receiving output from server\nDCC: -----------------------------------\n"); |
6a8f9482 TK |
336 | |
337 | /****************************************************************** | |
338 | * We should get 3 lines: * | |
339 | * 1/ First line is overall result: either 'A' for Accept, * | |
340 | * 'R' for Reject, 'S' for accept Some recipients or * | |
341 | * 'T' for a Temporary error. * | |
342 | * 2/ Second line contains the list of Accepted/Rejected * | |
343 | * recipients in the form AARRA (A = accepted, R = rejected). * | |
344 | * 3/ Third line contains the X-DCC header. * | |
345 | ******************************************************************/ | |
346 | ||
347 | line = 1; /* we start at the first line of the output */ | |
6a8f9482 | 348 | j = 0; /* will be used as index for the recipients list */ |
7390e768 | 349 | k = 0; /* initializing the index of the X-DCC header: dcc_header_str[k] */ |
6a8f9482 TK |
350 | |
351 | /* Let's read from the socket until there's nothing left to read */ | |
352 | bzero(recvbuf, sizeof(recvbuf)); | |
7156b1ef | 353 | while((resp = read(sockfd, recvbuf, sizeof(recvbuf)-1)) > 0) { |
6a8f9482 TK |
354 | /* How much did we get from the socket */ |
355 | c = Ustrlen(recvbuf) + 1; | |
356 | DEBUG(D_acl) | |
2369bf9c | 357 | debug_printf("DCC: Length of the output buffer is: %d\nDCC: Output buffer is:\nDCC: ------------\nDCC: %s\nDCC: -----------\n", c, recvbuf); |
6a8f9482 TK |
358 | |
359 | /* Now let's read each character and see what we've got */ | |
360 | for(i = 0; i < c; i++) { | |
361 | /* First check if we reached the end of the line and | |
362 | * then increment the line counter */ | |
363 | if(recvbuf[i] == '\n') { | |
364 | line++; | |
365 | } | |
366 | else { | |
367 | /* The first character of the first line is the | |
368 | * overall response. If there's another character | |
369 | * on that line it is not correct. */ | |
370 | if(line == 1) { | |
371 | if(i == 0) { | |
372 | /* Now get the value and set the | |
373 | * return value accordingly */ | |
374 | if(recvbuf[i] == 'A') { | |
375 | DEBUG(D_acl) | |
2369bf9c | 376 | debug_printf("DCC: Overall result = A\treturning OK\n"); |
6a8f9482 | 377 | Ustrcpy(dcc_return_text, "Mail accepted by DCC"); |
7156b1ef | 378 | dcc_result = US"A"; |
6a8f9482 TK |
379 | retval = OK; |
380 | } | |
381 | else if(recvbuf[i] == 'R') { | |
382 | DEBUG(D_acl) | |
2369bf9c | 383 | debug_printf("DCC: Overall result = R\treturning FAIL\n"); |
7156b1ef | 384 | dcc_result = US"R"; |
6a8f9482 TK |
385 | retval = FAIL; |
386 | if(sender_host_name) { | |
387 | log_write(0, LOG_MAIN, "H=%s [%s] F=<%s>: rejected by DCC", sender_host_name, sender_host_address, sender_address); | |
388 | } | |
389 | else { | |
390 | log_write(0, LOG_MAIN, "H=[%s] F=<%s>: rejected by DCC", sender_host_address, sender_address); | |
391 | } | |
392 | Ustrncpy(dcc_return_text, dcc_reject_message, Ustrlen(dcc_reject_message) + 1); | |
393 | } | |
394 | else if(recvbuf[i] == 'S') { | |
395 | DEBUG(D_acl) | |
2369bf9c | 396 | debug_printf("DCC: Overall result = S\treturning OK\n"); |
6a8f9482 | 397 | Ustrcpy(dcc_return_text, "Not all recipients accepted by DCC"); |
1a9312b2 TK |
398 | /* Since we're in an ACL we want a global result |
399 | * so we accept for all */ | |
7156b1ef | 400 | dcc_result = US"A"; |
6a8f9482 TK |
401 | retval = OK; |
402 | } | |
403 | else if(recvbuf[i] == 'G') { | |
404 | DEBUG(D_acl) | |
2369bf9c | 405 | debug_printf("DCC: Overall result = G\treturning FAIL\n"); |
6a8f9482 | 406 | Ustrcpy(dcc_return_text, "Greylisted by DCC"); |
7156b1ef | 407 | dcc_result = US"G"; |
1a9312b2 | 408 | retval = FAIL; |
6a8f9482 TK |
409 | } |
410 | else if(recvbuf[i] == 'T') { | |
411 | DEBUG(D_acl) | |
2369bf9c | 412 | debug_printf("DCC: Overall result = T\treturning DEFER\n"); |
6a8f9482 TK |
413 | retval = DEFER; |
414 | log_write(0,LOG_MAIN,"Temporary error with DCC: %s\n", recvbuf); | |
415 | Ustrcpy(dcc_return_text, "Temporary error with DCC"); | |
7156b1ef | 416 | dcc_result = US"T"; |
6a8f9482 TK |
417 | } |
418 | else { | |
419 | DEBUG(D_acl) | |
2369bf9c | 420 | debug_printf("DCC: Overall result = something else\treturning DEFER\n"); |
6a8f9482 TK |
421 | retval = DEFER; |
422 | log_write(0,LOG_MAIN,"Unknown DCC response: %s\n", recvbuf); | |
423 | Ustrcpy(dcc_return_text, "Unknown DCC response"); | |
7156b1ef | 424 | dcc_result = US"T"; |
6a8f9482 TK |
425 | } |
426 | } | |
427 | else { | |
96f5fe4c JH |
428 | /* We're on the first line but not on the first character, |
429 | * there must be something wrong. */ | |
430 | DEBUG(D_acl) debug_printf("DCC: Line = %d but i = %d != 0" | |
431 | " character is %c - This is wrong!\n", line, i, recvbuf[i]); | |
432 | log_write(0,LOG_MAIN,"Wrong header from DCC, output is %s\n", recvbuf); | |
6a8f9482 TK |
433 | } |
434 | } | |
435 | else if(line == 2) { | |
436 | /* On the second line we get a list of | |
7390e768 PP |
437 | * answers for each recipient. We don't care about |
438 | * it because we're in an acl and take the | |
1a9312b2 | 439 | * global result. */ |
6a8f9482 TK |
440 | } |
441 | else if(line > 2) { | |
7390e768 PP |
442 | /* The third and following lines are the X-DCC header, |
443 | * so we store it in dcc_header_str. */ | |
444 | /* check if we don't get more than we can handle */ | |
94431adb | 445 | if(k < sizeof(dcc_header_str)) { |
7390e768 | 446 | dcc_header_str[k] = recvbuf[i]; |
6a8f9482 TK |
447 | k++; |
448 | } | |
449 | else { | |
96f5fe4c JH |
450 | DEBUG(D_acl) debug_printf("DCC: We got more output than we can store" |
451 | " in the X-DCC header. Truncating at 120 characters.\n"); | |
6a8f9482 TK |
452 | } |
453 | } | |
454 | else { | |
455 | /* Wrong line number. There must be a problem with the output. */ | |
456 | DEBUG(D_acl) | |
2369bf9c | 457 | debug_printf("DCC: Wrong line number in output. Line number is %d\n", line); |
6a8f9482 TK |
458 | } |
459 | } | |
460 | } | |
461 | /* we reinitialize the output buffer before we read again */ | |
462 | bzero(recvbuf,sizeof(recvbuf)); | |
463 | } | |
464 | /* We have read everything from the socket */ | |
465 | ||
7390e768 PP |
466 | /* We need to terminate the X-DCC header with a '\n' character. This needs to be k-1 |
467 | * since dcc_header_str[k] contains '\0'. */ | |
468 | dcc_header_str[k-1] = '\n'; | |
6a8f9482 TK |
469 | |
470 | /* Now let's sum up what we've got. */ | |
471 | DEBUG(D_acl) | |
2369bf9c | 472 | 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 |
473 | |
474 | /* We only add the X-DCC header if it starts with X-DCC */ | |
7390e768 PP |
475 | if(!(Ustrncmp(dcc_header_str, "X-DCC", 5))){ |
476 | dcc_header = dcc_header_str; | |
6a8f9482 | 477 | if(dcc_direct_add_header) { |
7390e768 | 478 | header_add(' ' , "%s", dcc_header_str); |
1a9312b2 | 479 | /* since the MIME ACL already writes the .eml file to disk without DCC Header we've to erase it */ |
6a8f9482 TK |
480 | unspool_mbox(); |
481 | } | |
482 | } | |
483 | else { | |
484 | DEBUG(D_acl) | |
2369bf9c | 485 | debug_printf("DCC: Wrong format of the X-DCC header: %s\n", dcc_header_str); |
6a8f9482 TK |
486 | } |
487 | ||
1a9312b2 TK |
488 | /* check if we should add additional headers passed in acl_m_dcc_add_header */ |
489 | if(dcc_direct_add_header) { | |
7156b1ef | 490 | if (((xtra_hdrs = expand_string(US"$acl_m_dcc_add_header")) != NULL) && (xtra_hdrs[0] != '\0')) { |
1a9312b2 TK |
491 | Ustrncpy(dcc_xtra_hdrs, xtra_hdrs, sizeof(dcc_xtra_hdrs) - 2); |
492 | if (dcc_xtra_hdrs[Ustrlen(dcc_xtra_hdrs)-1] != '\n') | |
493 | Ustrcat(dcc_xtra_hdrs, "\n"); | |
494 | header_add(' ', "%s", dcc_xtra_hdrs); | |
495 | DEBUG(D_acl) | |
2369bf9c | 496 | debug_printf("DCC: adding additional headers in $acl_m_dcc_add_header: %s", dcc_xtra_hdrs); |
1a9312b2 TK |
497 | } |
498 | } | |
499 | ||
6a8f9482 TK |
500 | dcc_ok = 1; |
501 | /* Now return to exim main process */ | |
502 | DEBUG(D_acl) | |
2369bf9c | 503 | 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 |
504 | |
505 | (void)fclose(data_file); | |
6f0c431a PP |
506 | dcc_rc = retval; |
507 | return dcc_rc; | |
6a8f9482 TK |
508 | } |
509 | ||
510 | #endif |