| 1 | /************************************************* |
| 2 | * Exim - an Internet mail transport agent * |
| 3 | *************************************************/ |
| 4 | |
| 5 | /* Copyright (c) Wolfgang Breyha 2005 - 2015 |
| 6 | * Vienna University Computer Center |
| 7 | * wbreyha@gmx.net |
| 8 | * See the file NOTICE for conditions of use and distribution. |
| 9 | * |
| 10 | * Copyright (c) The Exim Maintainers 2015 - 2018 |
| 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 | int dcc_ok = 0; |
| 25 | int dcc_rc = 0; |
| 26 | |
| 27 | /* This function takes a file descriptor and a buffer as input and |
| 28 | * returns either 0 for success or errno in case of error. */ |
| 29 | |
| 30 | int flushbuffer (int socket, uschar *buffer) |
| 31 | { |
| 32 | int retval, rsp; |
| 33 | rsp = write(socket, buffer, Ustrlen(buffer)); |
| 34 | DEBUG(D_acl) |
| 35 | debug_printf("DCC: Result of the write() = %d\n", rsp); |
| 36 | if(rsp < 0) |
| 37 | { |
| 38 | DEBUG(D_acl) |
| 39 | debug_printf("DCC: Error writing buffer to socket: %s\n", strerror(errno)); |
| 40 | retval = errno; |
| 41 | } |
| 42 | else { |
| 43 | DEBUG(D_acl) |
| 44 | debug_printf("DCC: Wrote buffer to socket:\n%s\n", buffer); |
| 45 | retval = 0; |
| 46 | } |
| 47 | return retval; |
| 48 | } |
| 49 | |
| 50 | int |
| 51 | dcc_process(uschar **listptr) |
| 52 | { |
| 53 | int sep = 0; |
| 54 | const uschar *list = *listptr; |
| 55 | FILE *data_file; |
| 56 | uschar *dcc_default_ip_option = US"127.0.0.1"; |
| 57 | uschar *dcc_helo_option = US"localhost"; |
| 58 | uschar *dcc_reject_message = US"Rejected by DCC"; |
| 59 | uschar *xtra_hdrs = NULL; |
| 60 | uschar *override_client_ip = NULL; |
| 61 | |
| 62 | /* from local_scan */ |
| 63 | int i, j, k, c, retval, sockfd, resp, line; |
| 64 | unsigned int portnr; |
| 65 | struct sockaddr_un serv_addr; |
| 66 | struct sockaddr_in serv_addr_in; |
| 67 | struct hostent *ipaddress; |
| 68 | uschar sockpath[128]; |
| 69 | uschar sockip[40], client_ip[40]; |
| 70 | uschar opts[128]; |
| 71 | uschar rcpt[128], from[128]; |
| 72 | uschar sendbuf[4096]; |
| 73 | uschar recvbuf[4096]; |
| 74 | uschar dcc_return_text[1024]; |
| 75 | uschar message_subdir[2]; |
| 76 | struct header_line *dcchdr; |
| 77 | uschar *dcc_acl_options; |
| 78 | uschar dcc_acl_options_buffer[10]; |
| 79 | uschar dcc_xtra_hdrs[1024]; |
| 80 | |
| 81 | /* grep 1st option */ |
| 82 | if ((dcc_acl_options = string_nextinlist(&list, &sep, |
| 83 | dcc_acl_options_buffer, sizeof(dcc_acl_options_buffer)))) |
| 84 | { |
| 85 | /* parse 1st option */ |
| 86 | if ( strcmpic(dcc_acl_options, US"false") == 0 |
| 87 | || Ustrcmp(dcc_acl_options, "0") == 0 |
| 88 | ) |
| 89 | return FAIL; /* explicitly no matching */ |
| 90 | } |
| 91 | else |
| 92 | return FAIL; /* empty means "don't match anything" */ |
| 93 | |
| 94 | sep = 0; |
| 95 | |
| 96 | /* if we scanned this message last time, just return */ |
| 97 | if (dcc_ok) |
| 98 | return dcc_rc; |
| 99 | |
| 100 | /* open the spooled body */ |
| 101 | message_subdir[1] = '\0'; |
| 102 | for (i = 0; i < 2; i++) |
| 103 | { |
| 104 | message_subdir[0] = split_spool_directory == (i == 0) ? message_id[5] : 0; |
| 105 | |
| 106 | if ((data_file = Ufopen( |
| 107 | spool_fname(US"input", message_subdir, message_id, US"-D"), |
| 108 | "rb"))) |
| 109 | break; |
| 110 | } |
| 111 | |
| 112 | if (!data_file) |
| 113 | { |
| 114 | /* error while spooling */ |
| 115 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 116 | "dcc acl condition: error while opening spool file"); |
| 117 | return DEFER; |
| 118 | } |
| 119 | |
| 120 | /* Initialize the variables */ |
| 121 | |
| 122 | bzero(sockip,sizeof(sockip)); |
| 123 | if (dccifd_address) { |
| 124 | if (dccifd_address[0] == '/') |
| 125 | Ustrncpy(sockpath, dccifd_address, sizeof(sockpath)); |
| 126 | else |
| 127 | if( sscanf(CS dccifd_address, "%s %u", sockip, &portnr) != 2) { |
| 128 | log_write(0, LOG_MAIN, |
| 129 | "dcc acl condition: warning - invalid dccifd address: '%s'", dccifd_address); |
| 130 | (void)fclose(data_file); |
| 131 | return DEFER; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | /* opts is what we send as dccifd options - see man dccifd */ |
| 136 | /* We don't support any other option than 'header' so just copy that */ |
| 137 | bzero(opts,sizeof(opts)); |
| 138 | Ustrncpy(opts, dccifd_options, sizeof(opts)-1); |
| 139 | /* if $acl_m_dcc_override_client_ip is set use it */ |
| 140 | if (((override_client_ip = expand_string(US"$acl_m_dcc_override_client_ip")) != NULL) && |
| 141 | (override_client_ip[0] != '\0')) { |
| 142 | Ustrncpy(client_ip, override_client_ip, sizeof(client_ip)-1); |
| 143 | DEBUG(D_acl) |
| 144 | debug_printf("DCC: Client IP (overridden): %s\n", client_ip); |
| 145 | } |
| 146 | else if(sender_host_address) { |
| 147 | /* else if $sender_host_address is available use that? */ |
| 148 | Ustrncpy(client_ip, sender_host_address, sizeof(client_ip)-1); |
| 149 | DEBUG(D_acl) |
| 150 | debug_printf("DCC: Client IP (sender_host_address): %s\n", client_ip); |
| 151 | } |
| 152 | else { |
| 153 | /* sender_host_address is NULL which means it comes from localhost */ |
| 154 | Ustrncpy(client_ip, dcc_default_ip_option, sizeof(client_ip)-1); |
| 155 | DEBUG(D_acl) |
| 156 | debug_printf("DCC: Client IP (default): %s\n", client_ip); |
| 157 | } |
| 158 | /* strncat(opts, my_request, strlen(my_request)); */ |
| 159 | Ustrcat(opts, US"\n"); |
| 160 | Ustrncat(opts, client_ip, sizeof(opts)-Ustrlen(opts)-1); |
| 161 | Ustrncat(opts, US"\nHELO ", sizeof(opts)-Ustrlen(opts)-1); |
| 162 | Ustrncat(opts, dcc_helo_option, sizeof(opts)-Ustrlen(opts)-2); |
| 163 | Ustrcat(opts, US"\n"); |
| 164 | |
| 165 | /* initialize the other variables */ |
| 166 | dcchdr = header_list; |
| 167 | /* we set the default return value to DEFER */ |
| 168 | retval = DEFER; |
| 169 | |
| 170 | bzero(sendbuf,sizeof(sendbuf)); |
| 171 | bzero(dcc_header_str,sizeof(dcc_header_str)); |
| 172 | bzero(rcpt,sizeof(rcpt)); |
| 173 | bzero(from,sizeof(from)); |
| 174 | |
| 175 | /* send a null return path as "<>". */ |
| 176 | if (Ustrlen(sender_address) > 0) |
| 177 | Ustrncpy(from, sender_address, sizeof(from)); |
| 178 | else |
| 179 | Ustrncpy(from, US"<>", sizeof(from)); |
| 180 | Ustrncat(from, US"\n", sizeof(from)-Ustrlen(from)-1); |
| 181 | |
| 182 | /************************************** |
| 183 | * Now creating the socket connection * |
| 184 | **************************************/ |
| 185 | |
| 186 | /* If sockip contains an ip, we use a tcp socket, otherwise a UNIX socket */ |
| 187 | if(Ustrcmp(sockip, "")){ |
| 188 | ipaddress = gethostbyname(CS sockip); |
| 189 | bzero(CS &serv_addr_in, sizeof(serv_addr_in)); |
| 190 | serv_addr_in.sin_family = AF_INET; |
| 191 | bcopy(CS ipaddress->h_addr, CS &serv_addr_in.sin_addr.s_addr, ipaddress->h_length); |
| 192 | serv_addr_in.sin_port = htons(portnr); |
| 193 | if ((sockfd = socket(AF_INET, SOCK_STREAM,0)) < 0){ |
| 194 | DEBUG(D_acl) |
| 195 | debug_printf("DCC: Creating TCP socket connection failed: %s\n", strerror(errno)); |
| 196 | log_write(0,LOG_PANIC,"DCC: Creating TCP socket connection failed: %s\n", strerror(errno)); |
| 197 | /* if we cannot create the socket, defer the mail */ |
| 198 | (void)fclose(data_file); |
| 199 | return retval; |
| 200 | } |
| 201 | /* Now connecting the socket (INET) */ |
| 202 | if (connect(sockfd, (struct sockaddr *)&serv_addr_in, sizeof(serv_addr_in)) < 0){ |
| 203 | DEBUG(D_acl) |
| 204 | debug_printf("DCC: Connecting to TCP socket failed: %s\n", strerror(errno)); |
| 205 | log_write(0,LOG_PANIC,"DCC: Connecting to TCP socket failed: %s\n", strerror(errno)); |
| 206 | /* if we cannot contact the socket, defer the mail */ |
| 207 | (void)fclose(data_file); |
| 208 | return retval; |
| 209 | } |
| 210 | } else { |
| 211 | /* connecting to the dccifd UNIX socket */ |
| 212 | bzero(&serv_addr, sizeof(serv_addr)); |
| 213 | serv_addr.sun_family = AF_UNIX; |
| 214 | Ustrncpy(US serv_addr.sun_path, sockpath, sizeof(serv_addr.sun_path)); |
| 215 | if ((sockfd = socket(AF_UNIX, SOCK_STREAM,0)) < 0){ |
| 216 | DEBUG(D_acl) |
| 217 | debug_printf("DCC: Creating UNIX socket connection failed: %s\n", strerror(errno)); |
| 218 | log_write(0,LOG_PANIC,"DCC: Creating UNIX socket connection failed: %s\n", strerror(errno)); |
| 219 | /* if we cannot create the socket, defer the mail */ |
| 220 | (void)fclose(data_file); |
| 221 | return retval; |
| 222 | } |
| 223 | /* Now connecting the socket (UNIX) */ |
| 224 | if (connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0){ |
| 225 | DEBUG(D_acl) |
| 226 | debug_printf("DCC: Connecting to UNIX socket failed: %s\n", strerror(errno)); |
| 227 | log_write(0,LOG_PANIC,"DCC: Connecting to UNIX socket failed: %s\n", strerror(errno)); |
| 228 | /* if we cannot contact the socket, defer the mail */ |
| 229 | (void)fclose(data_file); |
| 230 | return retval; |
| 231 | } |
| 232 | } |
| 233 | /* the socket is open, now send the options to dccifd*/ |
| 234 | DEBUG(D_acl) |
| 235 | debug_printf("\nDCC: ---------------------------\nDCC: Socket opened; now sending input\nDCC: -----------------\n"); |
| 236 | /* First, fill in the input buffer */ |
| 237 | Ustrncpy(sendbuf, opts, sizeof(sendbuf)); |
| 238 | Ustrncat(sendbuf, from, sizeof(sendbuf)-Ustrlen(sendbuf)-1); |
| 239 | |
| 240 | DEBUG(D_acl) |
| 241 | { |
| 242 | debug_printf("DCC: opts = %s\nDCC: sender = %s\nDCC: rcpt count = %d\n", opts, from, recipients_count); |
| 243 | debug_printf("DCC: Sending options:\nDCC: ****************************\n"); |
| 244 | } |
| 245 | |
| 246 | /* let's send each of the recipients to dccifd */ |
| 247 | for (i = 0; i < recipients_count; i++){ |
| 248 | DEBUG(D_acl) |
| 249 | debug_printf("DCC: recipient = %s\n",recipients_list[i].address); |
| 250 | if(Ustrlen(sendbuf) + Ustrlen(recipients_list[i].address) > sizeof(sendbuf)) |
| 251 | { |
| 252 | DEBUG(D_acl) |
| 253 | debug_printf("DCC: Writing buffer: %s\n", sendbuf); |
| 254 | flushbuffer(sockfd, sendbuf); |
| 255 | bzero(sendbuf, sizeof(sendbuf)); |
| 256 | } |
| 257 | Ustrncat(sendbuf, recipients_list[i].address, sizeof(sendbuf)-Ustrlen(sendbuf)-1); |
| 258 | Ustrncat(sendbuf, US"\r\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); |
| 259 | } |
| 260 | /* send a blank line between options and message */ |
| 261 | Ustrncat(sendbuf, US"\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); |
| 262 | /* Now we send the input buffer */ |
| 263 | DEBUG(D_acl) |
| 264 | debug_printf("DCC: %s\nDCC: ****************************\n", sendbuf); |
| 265 | flushbuffer(sockfd, sendbuf); |
| 266 | |
| 267 | /* now send the message */ |
| 268 | /* Clear the input buffer */ |
| 269 | bzero(sendbuf, sizeof(sendbuf)); |
| 270 | /* First send the headers */ |
| 271 | /* Now send the headers */ |
| 272 | DEBUG(D_acl) |
| 273 | debug_printf("DCC: Sending headers:\nDCC: ****************************\n"); |
| 274 | Ustrncpy(sendbuf, dcchdr->text, sizeof(sendbuf)-2); |
| 275 | while((dcchdr=dcchdr->next)) { |
| 276 | if(dcchdr->slen > sizeof(sendbuf)-2) { |
| 277 | /* The size of the header is bigger than the size of |
| 278 | * the input buffer, so split it up in smaller parts. */ |
| 279 | flushbuffer(sockfd, sendbuf); |
| 280 | bzero(sendbuf, sizeof(sendbuf)); |
| 281 | j = 0; |
| 282 | while(j < dcchdr->slen) |
| 283 | { |
| 284 | for(i = 0; i < sizeof(sendbuf)-2; i++) { |
| 285 | sendbuf[i] = dcchdr->text[j]; |
| 286 | j++; |
| 287 | } |
| 288 | flushbuffer(sockfd, sendbuf); |
| 289 | bzero(sendbuf, sizeof(sendbuf)); |
| 290 | } |
| 291 | } else if(Ustrlen(sendbuf) + dcchdr->slen > sizeof(sendbuf)-2) { |
| 292 | flushbuffer(sockfd, sendbuf); |
| 293 | bzero(sendbuf, sizeof(sendbuf)); |
| 294 | Ustrncpy(sendbuf, dcchdr->text, sizeof(sendbuf)-2); |
| 295 | } else { |
| 296 | Ustrncat(sendbuf, dcchdr->text, sizeof(sendbuf)-Ustrlen(sendbuf)-2); |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | /* a blank line separates header from body */ |
| 301 | Ustrncat(sendbuf, US"\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); |
| 302 | flushbuffer(sockfd, sendbuf); |
| 303 | DEBUG(D_acl) |
| 304 | debug_printf("\nDCC: ****************************\n%s", sendbuf); |
| 305 | |
| 306 | /* Clear the input buffer */ |
| 307 | bzero(sendbuf, sizeof(sendbuf)); |
| 308 | |
| 309 | /* now send the body */ |
| 310 | DEBUG(D_acl) |
| 311 | debug_printf("DCC: Writing body:\nDCC: ****************************\n"); |
| 312 | (void)fseek(data_file, SPOOL_DATA_START_OFFSET, SEEK_SET); |
| 313 | while((fread(sendbuf, 1, sizeof(sendbuf)-1, data_file)) > 0) { |
| 314 | flushbuffer(sockfd, sendbuf); |
| 315 | bzero(sendbuf, sizeof(sendbuf)); |
| 316 | } |
| 317 | DEBUG(D_acl) |
| 318 | debug_printf("\nDCC: ****************************\n"); |
| 319 | |
| 320 | /* shutdown() the socket */ |
| 321 | if(shutdown(sockfd, 1) < 0){ |
| 322 | DEBUG(D_acl) |
| 323 | debug_printf("DCC: Couldn't shutdown socket: %s\n", strerror(errno)); |
| 324 | log_write(0,LOG_MAIN,"DCC: Couldn't shutdown socket: %s\n", strerror(errno)); |
| 325 | /* If there is a problem with the shutdown() |
| 326 | * defer the mail. */ |
| 327 | (void)fclose(data_file); |
| 328 | return retval; |
| 329 | } |
| 330 | DEBUG(D_acl) |
| 331 | debug_printf("\nDCC: -------------------------\nDCC: Input sent.\nDCC: -------------------------\n"); |
| 332 | |
| 333 | /******************************** |
| 334 | * receiving output from dccifd * |
| 335 | ********************************/ |
| 336 | DEBUG(D_acl) |
| 337 | debug_printf("\nDCC: -------------------------------------\nDCC: Now receiving output from server\nDCC: -----------------------------------\n"); |
| 338 | |
| 339 | /****************************************************************** |
| 340 | * We should get 3 lines: * |
| 341 | * 1/ First line is overall result: either 'A' for Accept, * |
| 342 | * 'R' for Reject, 'S' for accept Some recipients or * |
| 343 | * 'T' for a Temporary error. * |
| 344 | * 2/ Second line contains the list of Accepted/Rejected * |
| 345 | * recipients in the form AARRA (A = accepted, R = rejected). * |
| 346 | * 3/ Third line contains the X-DCC header. * |
| 347 | ******************************************************************/ |
| 348 | |
| 349 | line = 1; /* we start at the first line of the output */ |
| 350 | j = 0; /* will be used as index for the recipients list */ |
| 351 | k = 0; /* initializing the index of the X-DCC header: dcc_header_str[k] */ |
| 352 | |
| 353 | /* Let's read from the socket until there's nothing left to read */ |
| 354 | bzero(recvbuf, sizeof(recvbuf)); |
| 355 | while((resp = read(sockfd, recvbuf, sizeof(recvbuf)-1)) > 0) { |
| 356 | /* How much did we get from the socket */ |
| 357 | c = Ustrlen(recvbuf) + 1; |
| 358 | DEBUG(D_acl) |
| 359 | debug_printf("DCC: Length of the output buffer is: %d\nDCC: Output buffer is:\nDCC: ------------\nDCC: %s\nDCC: -----------\n", c, recvbuf); |
| 360 | |
| 361 | /* Now let's read each character and see what we've got */ |
| 362 | for(i = 0; i < c; i++) { |
| 363 | /* First check if we reached the end of the line and |
| 364 | * then increment the line counter */ |
| 365 | if(recvbuf[i] == '\n') { |
| 366 | line++; |
| 367 | } |
| 368 | else { |
| 369 | /* The first character of the first line is the |
| 370 | * overall response. If there's another character |
| 371 | * on that line it is not correct. */ |
| 372 | if(line == 1) { |
| 373 | if(i == 0) { |
| 374 | /* Now get the value and set the |
| 375 | * return value accordingly */ |
| 376 | if(recvbuf[i] == 'A') { |
| 377 | DEBUG(D_acl) |
| 378 | debug_printf("DCC: Overall result = A\treturning OK\n"); |
| 379 | Ustrcpy(dcc_return_text, US"Mail accepted by DCC"); |
| 380 | dcc_result = US"A"; |
| 381 | retval = OK; |
| 382 | } |
| 383 | else if(recvbuf[i] == 'R') { |
| 384 | DEBUG(D_acl) |
| 385 | debug_printf("DCC: Overall result = R\treturning FAIL\n"); |
| 386 | dcc_result = US"R"; |
| 387 | retval = FAIL; |
| 388 | if(sender_host_name) { |
| 389 | log_write(0, LOG_MAIN, "H=%s [%s] F=<%s>: rejected by DCC", sender_host_name, sender_host_address, sender_address); |
| 390 | } |
| 391 | else { |
| 392 | log_write(0, LOG_MAIN, "H=[%s] F=<%s>: rejected by DCC", sender_host_address, sender_address); |
| 393 | } |
| 394 | Ustrncpy(dcc_return_text, dcc_reject_message, Ustrlen(dcc_reject_message) + 1); |
| 395 | } |
| 396 | else if(recvbuf[i] == 'S') { |
| 397 | DEBUG(D_acl) |
| 398 | debug_printf("DCC: Overall result = S\treturning OK\n"); |
| 399 | Ustrcpy(dcc_return_text, US"Not all recipients accepted by DCC"); |
| 400 | /* Since we're in an ACL we want a global result |
| 401 | * so we accept for all */ |
| 402 | dcc_result = US"A"; |
| 403 | retval = OK; |
| 404 | } |
| 405 | else if(recvbuf[i] == 'G') { |
| 406 | DEBUG(D_acl) |
| 407 | debug_printf("DCC: Overall result = G\treturning FAIL\n"); |
| 408 | Ustrcpy(dcc_return_text, US"Greylisted by DCC"); |
| 409 | dcc_result = US"G"; |
| 410 | retval = FAIL; |
| 411 | } |
| 412 | else if(recvbuf[i] == 'T') { |
| 413 | DEBUG(D_acl) |
| 414 | debug_printf("DCC: Overall result = T\treturning DEFER\n"); |
| 415 | retval = DEFER; |
| 416 | log_write(0,LOG_MAIN,"Temporary error with DCC: %s\n", recvbuf); |
| 417 | Ustrcpy(dcc_return_text, US"Temporary error with DCC"); |
| 418 | dcc_result = US"T"; |
| 419 | } |
| 420 | else { |
| 421 | DEBUG(D_acl) |
| 422 | debug_printf("DCC: Overall result = something else\treturning DEFER\n"); |
| 423 | retval = DEFER; |
| 424 | log_write(0,LOG_MAIN,"Unknown DCC response: %s\n", recvbuf); |
| 425 | Ustrcpy(dcc_return_text, US"Unknown DCC response"); |
| 426 | dcc_result = US"T"; |
| 427 | } |
| 428 | } |
| 429 | else { |
| 430 | /* We're on the first line but not on the first character, |
| 431 | * there must be something wrong. */ |
| 432 | DEBUG(D_acl) debug_printf("DCC: Line = %d but i = %d != 0" |
| 433 | " character is %c - This is wrong!\n", line, i, recvbuf[i]); |
| 434 | log_write(0,LOG_MAIN,"Wrong header from DCC, output is %s\n", recvbuf); |
| 435 | } |
| 436 | } |
| 437 | else if(line == 2) { |
| 438 | /* On the second line we get a list of |
| 439 | * answers for each recipient. We don't care about |
| 440 | * it because we're in an acl and take the |
| 441 | * global result. */ |
| 442 | } |
| 443 | else if(line > 2) { |
| 444 | /* The third and following lines are the X-DCC header, |
| 445 | * so we store it in dcc_header_str. */ |
| 446 | /* check if we don't get more than we can handle */ |
| 447 | if(k < sizeof(dcc_header_str)) { |
| 448 | dcc_header_str[k] = recvbuf[i]; |
| 449 | k++; |
| 450 | } |
| 451 | else { |
| 452 | DEBUG(D_acl) debug_printf("DCC: We got more output than we can store" |
| 453 | " in the X-DCC header. Truncating at 120 characters.\n"); |
| 454 | } |
| 455 | } |
| 456 | else { |
| 457 | /* Wrong line number. There must be a problem with the output. */ |
| 458 | DEBUG(D_acl) |
| 459 | debug_printf("DCC: Wrong line number in output. Line number is %d\n", line); |
| 460 | } |
| 461 | } |
| 462 | } |
| 463 | /* we reinitialize the output buffer before we read again */ |
| 464 | bzero(recvbuf,sizeof(recvbuf)); |
| 465 | } |
| 466 | /* We have read everything from the socket */ |
| 467 | |
| 468 | /* We need to terminate the X-DCC header with a '\n' character. This needs to be k-1 |
| 469 | * since dcc_header_str[k] contains '\0'. */ |
| 470 | dcc_header_str[k-1] = '\n'; |
| 471 | |
| 472 | /* Now let's sum up what we've got. */ |
| 473 | DEBUG(D_acl) |
| 474 | 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); |
| 475 | |
| 476 | /* We only add the X-DCC header if it starts with X-DCC */ |
| 477 | if(!(Ustrncmp(dcc_header_str, "X-DCC", 5))){ |
| 478 | dcc_header = dcc_header_str; |
| 479 | if(dcc_direct_add_header) { |
| 480 | header_add(' ' , "%s", dcc_header_str); |
| 481 | /* since the MIME ACL already writes the .eml file to disk without DCC Header we've to erase it */ |
| 482 | unspool_mbox(); |
| 483 | } |
| 484 | } |
| 485 | else { |
| 486 | DEBUG(D_acl) |
| 487 | debug_printf("DCC: Wrong format of the X-DCC header: %s\n", dcc_header_str); |
| 488 | } |
| 489 | |
| 490 | /* check if we should add additional headers passed in acl_m_dcc_add_header */ |
| 491 | if(dcc_direct_add_header) { |
| 492 | if (((xtra_hdrs = expand_string(US"$acl_m_dcc_add_header")) != NULL) && (xtra_hdrs[0] != '\0')) { |
| 493 | Ustrncpy(dcc_xtra_hdrs, xtra_hdrs, sizeof(dcc_xtra_hdrs) - 2); |
| 494 | if (dcc_xtra_hdrs[Ustrlen(dcc_xtra_hdrs)-1] != '\n') |
| 495 | Ustrcat(dcc_xtra_hdrs, US"\n"); |
| 496 | header_add(' ', "%s", dcc_xtra_hdrs); |
| 497 | DEBUG(D_acl) |
| 498 | debug_printf("DCC: adding additional headers in $acl_m_dcc_add_header: %s", dcc_xtra_hdrs); |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | dcc_ok = 1; |
| 503 | /* Now return to exim main process */ |
| 504 | DEBUG(D_acl) |
| 505 | 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); |
| 506 | |
| 507 | (void)fclose(data_file); |
| 508 | dcc_rc = retval; |
| 509 | return dcc_rc; |
| 510 | } |
| 511 | |
| 512 | #endif |