masqmail-0.2: a80ebfa16cd5 src/accept.c

masqmail-0.2

view src/accept.c @ 114:a80ebfa16cd5

better debugging output (thanks to Paolo)

author	meillo@marmaro.de
date	Wed, 30 Jun 2010 15:00:59 +0200
parents	c678d0342451
children	5ec5e6637049

line source

1 /* MasqMail

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

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

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

7 (at your option) any later version.

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

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

11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

12 GNU General Public License for more details.

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

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

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

17 */

19 #include "masqmail.h"

20 #include "readsock.h"

22 gchar *prot_names[] = {

23 "local",

24 "bsmtp",

25 "smtp",

26 "esmtp",

27 "pop3",

28 "apop",

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

30 };

32 static gchar*

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

34 {

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

36 gchar *p = res + len;

37 *p = '\0';

38 while (p > res) {

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

40 value /= 62;

41 }

42 return res;

43 }

45 static gint

46 _g_list_addr_isequal(gconstpointer a, gconstpointer b)

47 {

48 address *addr1 = (address *) a;

49 address *addr2 = (address *) b;

50 int ret;

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

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

54 else

55 return ret;

56 }

58 /* accept message from anywhere.

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

61 The -t option:

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

63 headers to the recipients list.

64 The ACC_DEL_RCPTS flag makes only sense if the ACC_RCPT_FROM_HEAD

65 flag is given too. With ACC_DEL_RCPTS the recipients given on the

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

67 */

69 accept_error

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

71 {

72 gchar *line, *line1;

73 int line_size = MAX_DATALINE;

74 gboolean in_headers = TRUE;

75 header *hdr = NULL;

76 gint line_cnt = 0, data_size = 0;

78 line = g_malloc(line_size);

79 line[0] = '\0';

81 while (TRUE) {

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

84 line1 = line;

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

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

88 g_free(line);

89 break;

90 }

91 line1++;

92 }

94 if (len <= 0) {

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

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

97 gint len1 = strlen(line1);

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

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

100 line1[len1] = '\n';

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

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

103 data_size += strlen(line1);

104 line_cnt++;

105 }

106 }

107 break;

108 } else {

109 g_free(line);

110 if (len == -1) {

111 return AERR_EOF;

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

113 /* should not happen any more */

114 return AERR_OVERFLOW;

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

116 return AERR_TIMEOUT;

117 } else {

118 /* does not happen */

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

120 return AERR_UNKNOWN;

121 }

122 }

123 } else {

124 if (in_headers) {

125

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

127 if (msg->hdr_list == NULL)

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

129 continue;

130

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

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

133 if (hdr) {

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

135 }

136

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

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

139 in_headers = FALSE;

140 } else {

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

142 if ((hdr = get_header(line1)))

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

144 else {

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

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

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

148 in_headers = FALSE;

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

150 }

151 }

152 } else {

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

154 data_size += strlen(line1);

155 line_cnt++;

156 }

157 }

158 }

159

160 if (msg->data_list != NULL)

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

162 else

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

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

165

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

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

168

169 msg->data_size = data_size;

170 msg->received_time = time(NULL);

171

172 return AERR_OK;

173 }

174

175 accept_error

176 accept_message_prepare(message * msg, guint flags)

177 {

178 struct passwd *passwd = NULL;

179 GList *non_rcpt_list = NULL;

180 time_t rec_time = time(NULL);

181

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

183

184 /* create unique message id */

185 msg->uid = g_malloc(14);

186

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

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

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

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

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

192 msg->uid[13] = 0;

193

194 /* if local, get password entry */

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

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

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

198 }

199

200 /* set return path if local */

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

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

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

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

205 g_free(path);

206 }

207

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

209 if (flags & ACC_DEL_RCPTS) {

210 non_rcpt_list = msg->rcpt_list;

211 msg->rcpt_list = NULL;

212 }

213

214 /* scan headers */

215 {

216 gboolean has_id = FALSE;

217 gboolean has_date = FALSE;

218 gboolean has_sender = FALSE;

219 gboolean has_from = FALSE;

220 gboolean has_to_or_cc = FALSE;

221 GList *hdr_node, *hdr_node_next;

222 header *hdr;

223

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

225 hdr_node != NULL; hdr_node = hdr_node_next) {

226 hdr_node_next = g_list_next(hdr_node);

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

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

229 switch (hdr->id) {

230 case HEAD_MESSAGE_ID:

231 has_id = TRUE;

232 break;

233 case HEAD_DATE:

234 has_date = TRUE;

235 break;

236 case HEAD_FROM:

237 has_from = TRUE;

238 break;

239 case HEAD_SENDER:

240 has_sender = TRUE;

241 break;

242 case HEAD_TO:

243 case HEAD_CC:

244 has_to_or_cc = TRUE;

245 /* fall through */

246 case HEAD_BCC:

247 if (flags & ACC_RCPT_FROM_HEAD) {

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

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

250 if (hdr->value) {

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

252 }

253 }

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

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

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

257 g_list_free_1(hdr_node);

258 destroy_header(hdr);

259 }

260 break;

261 case HEAD_ENVELOPE_TO:

262 if (flags & ACC_SAVE_ENVELOPE_TO) {

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

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

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

266 }

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

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

269 g_list_free_1(hdr_node);

270 destroy_header(hdr);

271 break;

272 case HEAD_RETURN_PATH:

273 if (flags & ACC_MAIL_FROM_HEAD) {

274 /* usually POP3 accept */

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

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

277 }

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

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

280 g_list_free_1(hdr_node);

281 destroy_header(hdr);

282 break;

283 default:

284 break; /* make compiler happy */

285 }

286 }

287

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

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

290 GList *hdr_list;

291 header *hdr;

292

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

294

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

296 if (!hdr_list)

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

298 if (hdr_list) {

299 gchar *addr;

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

301

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

303

304 addr = g_strdup(hdr->value);

305 g_strchomp(addr);

306

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

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

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

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

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

312 }

313 g_free(addr);

314 }

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

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

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

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

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

320 }

321 }

322

323 if (flags & ACC_DEL_RCPTS) {

324 /* remove the recipients given on the command line from the ones given in headers

325 -t option (see comment above) */

326 GList *rcpt_node;

327 foreach(non_rcpt_list, rcpt_node) {

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

329 GList *node;

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

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

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

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

334 g_list_free_1(node);

335 }

336 }

337 }

338

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

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

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

342 return AERR_NORCPT;

343 }

344

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

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

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

348 msg->full_sender_name

349 ?

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

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

352 :

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

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

355 );

356 }

357 if (!has_to_or_cc) {

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

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

360 }

361 if (!has_date) {

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

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

364 }

365 if (!has_id) {

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

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

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

369 }

370 }

371

372 /* Received header: */

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

374 gchar *for_string = NULL;

375 header *hdr = NULL;

376

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

378

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

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

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

382 }

383

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

385 /* received locally */

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

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

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

389 } else {

390 /* received from remote */

391 #ifdef ENABLE_IDENT

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

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

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

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

396 rec_timestamp());

397 #else

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

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

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

401 #endif

402 }

403 header_fold(hdr);

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

405

406 if (for_string)

407 g_free(for_string);

408

409 /* write message to spool: */

410 /* accept is no longer responsible for this

411 if (!spool_write(msg, TRUE))

412 return AERR_NOSPOOL;

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 }