masqmail: 7b12d081b939 src/accept.c

masqmail

view src/accept.c @ 268:7b12d081b939

removed ACC_DEL_RCPTS because it's always used with ACC_RCPT_FROM_HEAD They are used for -t and always together.

author	markus schnalke <meillo@marmaro.de>
date	Fri, 03 Dec 2010 11:40:58 -0300
parents	409552c5647f
children	fd1d77e5a5da

line source

1 /* MasqMail

5 This program is free software; you can redistribute it and/or modify

6 it under the terms of the GNU General Public License as published by

7 the Free Software Foundation; either version 2 of the License, or

8 (at your option) any later version.

10 This program is distributed in the hope that it will be useful,

11 but WITHOUT ANY WARRANTY; without even the implied warranty of

12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

13 GNU General Public License for more details.

15 You should have received a copy of the GNU General Public License

16 along with this program; if not, write to the Free Software

17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

18 */

20 #include "masqmail.h"

21 #include "readsock.h"

23 gchar *prot_names[] = {

24 "local",

25 "bsmtp",

26 "smtp",

27 "esmtp",

28 "(unknown)" /* should not happen, but better than crashing. */

29 };

31 static gchar*

32 string_base62(gchar * res, guint value, gchar len)

33 {

34 static gchar base62_chars[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

35 gchar *p = res + len;

36 *p = '\0';

37 while (p > res) {

38 *(--p) = base62_chars[value % 62];

39 value /= 62;

40 }

41 return res;

42 }

44 static gint

45 _g_list_addr_isequal(gconstpointer a, gconstpointer b)

46 {

47 address *addr1 = (address *) a;

48 address *addr2 = (address *) b;

49 int ret;

51 if ((ret = strcasecmp(addr1->domain, addr2->domain)) == 0)

52 return strcmp(addr1->local_part, addr2->local_part);

53 else

54 return ret;

55 }

57 /* accept message from anywhere.

58 A locally originating message is indicated by msg->recieved_host == NULL

60 The -t option:

61 The ACC_RCPT_FROM_HEAD flag adds the recipients found in To/Cc/Bcc

62 headers to the recipients list. The recipients given on the

63 command line are removed from the ones given in headers.

64 */

66 accept_error

67 accept_message_stream(FILE * in, message * msg, guint flags)

68 {

69 gchar *line, *line1;

70 int line_size = MAX_DATALINE;

71 gboolean in_headers = TRUE;

72 header *hdr = NULL;

73 gint line_cnt = 0, data_size = 0;

75 line = g_malloc(line_size);

76 line[0] = '\0';

78 while (TRUE) {

79 int len = read_sockline1(in, &line, &line_size, 5 * 60, READSOCKL_CVT_CRLF);

81 line1 = line;

83 if ((line[0] == '.') && (!(flags & ACC_DOT_IGNORE))) {

84 if (line[1] == '\n') {

85 g_free(line);

86 break;

87 }

88 line1++;

89 }

91 if (len <= 0) {

92 if ((len == -1) && (flags & (ACC_DOT_IGNORE | ACC_NODOT_RELAX))) {

93 /* we got an EOF, and the last line was not terminated by a CR */

94 gint len1 = strlen(line1);

95 if (len1 > 0) { /* == 0 is 'normal' (EOF after a CR) */

96 if (line1[len1 - 1] != '\n') { /* some mail clients allow unterminated lines */

97 line1[len1] = '\n';

98 line1[len1 + 1] = '\0';

99 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));

100 data_size += strlen(line1);

101 line_cnt++;

102 }

103 }

104 break;

105 } else {

106 g_free(line);

107 if (len == -1) {

108 return AERR_EOF;

109 } else if (len == -2) {

110 /* should not happen any more */

111 return AERR_OVERFLOW;

112 } else if (len == -3) {

113 return AERR_TIMEOUT;

114 } else {

115 /* does not happen */

116 DEBUG(5) debugf("read_sockline returned %d\n", len);

117 return AERR_UNKNOWN;

118 }

119 }

120 } else {

121 if (in_headers) {

122

123 /* some pop servers send the 'From ' line, skip it: */

124 if (msg->hdr_list == NULL)

125 if (strncmp(line1, "From ", 5) == 0)

126 continue;

127

128 if (line1[0] == ' ' || line1[0] == '\t') {

129 /* continuation of 'folded' header: */

130 if (hdr) {

131 hdr->header = g_strconcat(hdr->header, line1, NULL);

132 }

133

134 } else if (line1[0] == '\n') {

135 /* an empty line marks end of headers */

136 in_headers = FALSE;

137 } else {

138 /* in all other cases we expect another header */

139 if ((hdr = get_header(line1)))

140 msg->hdr_list = g_list_append(msg->hdr_list, hdr);

141 else {

142 /* if get_header() returns NULL, no header was recognized,

143 so this seems to be the first data line of a broken mailer

144 which does not send an empty line after the headers */

145 in_headers = FALSE;

146 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));

147 }

148 }

149 } else {

150 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));

151 data_size += strlen(line1);

152 line_cnt++;

153 }

154 }

155 if (conf.max_msg_size && (data_size > conf.max_msg_size)) {

156 DEBUG(4) debugf("accept_message_stream(): "

157 "received %d bytes (conf.max_msg_size=%d)\n",

158 data_size, conf.max_msg_size);

159 return AERR_SIZE;

160 }

161

162 }

163

164 if (msg->data_list != NULL)

165 msg->data_list = g_list_reverse(msg->data_list);

166 else

167 /* make sure data list is not NULL: */

168 msg->data_list = g_list_append(NULL, g_strdup(""));

169

170 DEBUG(4) debugf("received %d lines of data (%d bytes)\n", line_cnt, data_size);

171 /* we get here after we succesfully received the mail data */

172

173 msg->data_size = data_size;

174 msg->received_time = time(NULL);

175

176 return AERR_OK;

177 }

178

179 accept_error

180 accept_message_prepare(message * msg, guint flags)

181 {

182 struct passwd *passwd = NULL;

183 GList *non_rcpt_list = NULL;

184 time_t rec_time = time(NULL);

185

186 DEBUG(5) debugf("accept_message_prepare()\n");

187

188 /* create unique message id */

189 msg->uid = g_malloc(14);

190

191 string_base62(msg->uid, rec_time, 6);

192 msg->uid[6] = '-';

193 string_base62(&(msg->uid[7]), getpid(), 3);

194 msg->uid[10] = '-';

195 string_base62(&(msg->uid[11]), msg->transfer_id, 2);

196 msg->uid[13] = 0;

197

198 /* if local, get password entry */

199 if (msg->received_host == NULL) {

200 passwd = g_memdup(getpwuid(geteuid()), sizeof(struct passwd));

201 msg->ident = g_strdup(passwd->pw_name);

202 }

203

204 /* set return path if local */

205 if (msg->return_path == NULL && msg->received_host == NULL) {

206 gchar *path = g_strdup_printf("<%s@%s>", passwd->pw_name, conf.host_name);

207 DEBUG(3) debugf("setting return_path for local accept: %s\n", path);

208 msg->return_path = create_address(path, TRUE);

209 g_free(path);

210 }

211

212 /* -t option (see comment above) */

213 if (flags & ACC_RCPT_FROM_HEAD) {

214 non_rcpt_list = msg->rcpt_list;

215 msg->rcpt_list = NULL;

216 }

217

218 /* scan headers */

219 {

220 gboolean has_id = FALSE;

221 gboolean has_date = FALSE;

222 gboolean has_sender = FALSE;

223 gboolean has_from = FALSE;

224 gboolean has_to_or_cc = FALSE;

225 GList *hdr_node, *hdr_node_next;

226 header *hdr;

227

228 for (hdr_node = g_list_first(msg->hdr_list);

229 hdr_node != NULL; hdr_node = hdr_node_next) {

230 hdr_node_next = g_list_next(hdr_node);

231 hdr = ((header *) (hdr_node->data));

232 DEBUG(5) debugf("scanning headers: %s", hdr->header);

233 switch (hdr->id) {

234 case HEAD_MESSAGE_ID:

235 has_id = TRUE;

236 break;

237 case HEAD_DATE:

238 has_date = TRUE;

239 break;

240 case HEAD_FROM:

241 has_from = TRUE;

242 break;

243 case HEAD_SENDER:

244 has_sender = TRUE;

245 break;

246 case HEAD_TO:

247 case HEAD_CC:

248 has_to_or_cc = TRUE;

249 /* fall through */

250 case HEAD_BCC:

251 if (flags & ACC_RCPT_FROM_HEAD) {

252 /* -t option (see comment above) */

253 DEBUG(5) debugf("hdr->value = %s\n", hdr->value);

254 if (hdr->value) {

255 msg->rcpt_list = addr_list_append_rfc822(msg->rcpt_list, hdr->value, conf.host_name);

256 }

257 }

258 if (hdr->id == HEAD_BCC) {

259 DEBUG(3) debugf("removing 'Bcc' header\n");

260 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);

261 g_list_free_1(hdr_node);

262 destroy_header(hdr);

263 }

264 break;

265 case HEAD_ENVELOPE_TO:

266 if (flags & ACC_SAVE_ENVELOPE_TO) {

267 DEBUG(3) debugf("creating 'X-Orig-Envelope-To' header\n");

268 msg->hdr_list = g_list_prepend(msg->hdr_list, create_header(HEAD_UNKNOWN,

269 "X-Orig-Envelope-to: %s", hdr->value));

270 }

271 DEBUG(3) debugf("removing 'Envelope-To' header\n");

272 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);

273 g_list_free_1(hdr_node);

274 destroy_header(hdr);

275 break;

276 case HEAD_RETURN_PATH:

277 if (flags & ACC_MAIL_FROM_HEAD) {

278 /* usually POP3 accept */

279 msg->return_path = create_address_qualified(hdr->value, TRUE, msg->received_host);

280 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));

281 }

282 DEBUG(3) debugf("removing 'Return-Path' header\n");

283 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);

284 g_list_free_1(hdr_node);

285 destroy_header(hdr);

286 break;

287 default:

288 break; /* make compiler happy */

289 }

290 }

291

292 if (msg->return_path == NULL) {

293 /* this can happen for pop3 accept only and if no Return-path: header was given */

294 GList *hdr_list;

295 header *hdr;

296

297 DEBUG(3) debugf("return_path == NULL\n");

298

299 hdr_list = find_header(msg->hdr_list, HEAD_SENDER, NULL);

300 if (!hdr_list)

301 hdr_list = find_header(msg->hdr_list, HEAD_FROM, NULL);

302 if (hdr_list) {

303 gchar *addr;

304 hdr = (header *) (g_list_first(hdr_list)->data);

305

306 DEBUG(5) debugf("hdr->value = '%s'\n", hdr->value);

307

308 addr = g_strdup(hdr->value);

309 g_strchomp(addr);

310

311 if ((msg->return_path = create_address_qualified(addr, FALSE, msg->received_host)) != NULL) {

312 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));

313 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN,

314 "X-Warning: return path set from %s address\n",

315 hdr->id == HEAD_SENDER ? "Sender:" : "From:"));

316 }

317 g_free(addr);

318 }

319 if (msg->return_path == NULL) { /* no Sender: or From: or create_address_qualified failed */

320 msg->return_path = create_address_qualified("postmaster", TRUE, conf.host_name);

321 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));

322 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN,

323 "X-Warning: real return path is unknown\n"));

324 }

325 }

326

327 if (flags & ACC_RCPT_FROM_HEAD) {

328 /* remove the recipients given on the command line

329 from the ones given in headers

330 -t option (see comment above) */

331 GList *rcpt_node;

332 foreach(non_rcpt_list, rcpt_node) {

333 address *rcpt = (address *) (rcpt_node->data);

334 GList *node;

335 if ((node = g_list_find_custom(msg->rcpt_list, rcpt, _g_list_addr_isequal))) {

336 DEBUG(3) debugf("removing rcpt address %s\n", addr_string(node->data));

337 msg->rcpt_list = g_list_remove_link(msg->rcpt_list, node);

338 destroy_address((address *) (node->data));

339 g_list_free_1(node);

340 }

341 }

342 }

343

344 /* here we should have our recipients, fail if not: */

345 if (msg->rcpt_list == NULL) {

346 logwrite(LOG_WARNING, "no recipients found in message\n");

347 return AERR_NORCPT;

348 }

349

350 if (!(has_sender || has_from)) {

351 DEBUG(3) debugf("adding 'From' header\n");

352 msg->hdr_list = g_list_append(msg->hdr_list,

353 msg->full_sender_name

354 ?

355 create_header(HEAD_FROM, "From: \"%s\" <%s@%s>\n", msg->full_sender_name,

356 msg->return_path->local_part, msg->return_path->domain)

357 :

358 create_header(HEAD_FROM, "From: <%s@%s>\n",

359 msg->return_path->local_part, msg->return_path->domain)

360 );

361 }

362 if (!has_to_or_cc) {

363 DEBUG(3) debugf("no To: or Cc: header, hence adding `To: undisclosed recipients:;'\n");

364 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_TO, "To: undisclosed-recipients:;\n"));

365 }

366 if (!has_date) {

367 DEBUG(3) debugf("adding 'Date:' header\n");

368 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_DATE, "Date: %s\n", rec_timestamp()));

369 }

370 if (!has_id) {

371 DEBUG(3) debugf("adding 'Message-ID:' header\n");

372 msg->hdr_list = g_list_append(msg->hdr_list,

373 create_header(HEAD_MESSAGE_ID, "Message-ID: <%s@%s>\n", msg->uid, conf.host_name));

374 }

375 }

376

377 /* Received header: */

378 /* At this point because we have to know the rcpts for the 'for' part */

379 gchar *for_string = NULL;

380 header *hdr = NULL;

381

382 DEBUG(3) debugf("adding 'Received:' header\n");

383

384 if (g_list_length(msg->rcpt_list) == 1) {

385 address *addr = (address *) (g_list_first(msg->rcpt_list)->data);

386 for_string = g_strdup_printf(" for %s", addr_string(addr));

387 }

388

389 if (msg->received_host == NULL) {

390 /* received locally */

391 hdr = create_header(HEAD_RECEIVED, "Received: from %s by %s with %s (%s %s) id %s%s; %s\n",

392 passwd->pw_name, conf.host_name, prot_names[msg->received_prot],

393 PACKAGE, VERSION, msg->uid, for_string ? for_string : "", rec_timestamp());

394 } else {

395 /* received from remote */

396 #ifdef ENABLE_IDENT

397 DEBUG(5) debugf("adding 'Received:' header (5)\n");

398 hdr = create_header(HEAD_RECEIVED, "Received: from %s (ident=%s) by %s with %s (%s %s) id %s%s; %s\n",

399 msg->received_host, msg->ident ? msg->ident : "unknown", conf.host_name,

400 prot_names[msg->received_prot], PACKAGE, VERSION, msg->uid, for_string ? for_string : "",

401 rec_timestamp());

402 #else

403 hdr = create_header(HEAD_RECEIVED, "Received: from %s by %s with %s (%s %s) id %s%s; %s\n",

404 msg->received_host, conf.host_name, prot_names[msg->received_prot],

405 PACKAGE, VERSION, msg->uid, for_string ? for_string : "", rec_timestamp());

406 #endif

407 }

408 header_fold(hdr);

409 msg->hdr_list = g_list_prepend(msg->hdr_list, hdr);

410

411 if (for_string)

412 g_free(for_string);

413

414 return AERR_OK;

415 }

416

417 accept_error

418 accept_message(FILE * in, message * msg, guint flags)

419 {

420 accept_error err;

421

422 err = accept_message_stream(in, msg, flags);

423 if (err == AERR_OK)

424 err = accept_message_prepare(msg, flags);

425

426 return err;

427 }