masqmail: 84ea0b1fc8f8 src/accept.c

masqmail

view src/accept.c @ 288:84ea0b1fc8f8

FIXME comment: where to log while reading the config file?

author	markus schnalke <meillo@marmaro.de>
date	Tue, 07 Dec 2010 19:21:44 -0300
parents	1405012509e3
children	bb3005ce0837

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 }

54 return ret;

55 }

57 /* accept message from anywhere.

58 A message from local is indicated by msg->recieved_host == NULL

60 The -t option: With the ACC_RCPT_FROM_HEAD flag the addrs found found

61 in To/Cc/Bcc headers are added to the recipient list.

62 */

64 accept_error

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

66 {

67 gchar *line, *line1;

68 int line_size = MAX_DATALINE;

69 gboolean in_headers = TRUE;

70 header *hdr = NULL;

71 gint line_cnt = 0, data_size = 0;

73 line = g_malloc(line_size);

74 line[0] = '\0';

76 while (TRUE) {

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

79 line1 = line;

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

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

83 g_free(line);

84 break;

85 }

86 line1++;

87 }

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

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

91 gint len1 = strlen(line1);

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

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

94 line1[len1] = '\n';

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

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

97 data_size += strlen(line1);

98 line_cnt++;

99 }

100 }

101 break;

102

103 } else if (len == -1) {

104 g_free(line);

105 return AERR_EOF;

106

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

108 /* should not happen any more */

109 g_free(line);

110 return AERR_OVERFLOW;

111

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

113 g_free(line);

114 return AERR_TIMEOUT;

115

116 } else if (len <= 0) {

117 /* does not happen */

118 g_free(line);

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

120 return AERR_UNKNOWN;

121

122 }

123

124 if (in_headers) {

125

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

127 if (!msg->hdr_list && strncmp(line1, "From ", 5) == 0) {

128 continue;

129 }

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 /* message body */

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

155 data_size += strlen(line1);

156 line_cnt++;

157 }

158

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

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

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

162 data_size, conf.max_msg_size);

163 return AERR_SIZE;

164 }

165

166 }

167

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

169

170 if (!msg->data_list) {

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

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

173 }

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

175

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

177

178 msg->data_size = data_size;

179 msg->received_time = time(NULL);

180

181 return AERR_OK;

182 }

183

184 accept_error

185 accept_message_prepare(message * msg, guint flags)

186 {

187 struct passwd *passwd = NULL;

188 time_t rec_time = time(NULL);

189

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

191

192 /* create unique message id */

193 msg->uid = g_malloc(14);

194

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

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

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

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

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

200 msg->uid[13] = 0;

201

202 /* if local, get password entry */

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

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

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

206 }

207

208 /* set return path if local */

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

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

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

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

213 g_free(path);

214 }

215

216 /* scan headers */

217 {

218 gboolean has_id = FALSE;

219 gboolean has_date = FALSE;

220 gboolean has_sender = FALSE;

221 gboolean has_from = FALSE;

222 gboolean has_to_or_cc = FALSE;

223 GList *hdr_node, *hdr_node_next;

224 header *hdr;

225

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

227 hdr_node != NULL; hdr_node = hdr_node_next) {

228 hdr_node_next = g_list_next(hdr_node);

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

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

231 switch (hdr->id) {

232 case HEAD_MESSAGE_ID:

233 has_id = TRUE;

234 break;

235 case HEAD_DATE:

236 has_date = TRUE;

237 break;

238 case HEAD_FROM:

239 has_from = TRUE;

240 break;

241 case HEAD_SENDER:

242 has_sender = TRUE;

243 break;

244 case HEAD_TO:

245 case HEAD_CC:

246 has_to_or_cc = TRUE;

247 /* fall through */

248 case HEAD_BCC:

249 if (flags & ACC_RCPT_FROM_HEAD) {

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

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

252 if (hdr->value) {

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

254 }

255 }

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

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

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

259 g_list_free_1(hdr_node);

260 destroy_header(hdr);

261 }

262 break;

263 case HEAD_ENVELOPE_TO:

264 if (flags & ACC_SAVE_ENVELOPE_TO) {

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

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

267 "X-Orig-Envelope-To: %s", hdr->value));

268 }

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

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

271 g_list_free_1(hdr_node);

272 destroy_header(hdr);

273 break;

274 case HEAD_RETURN_PATH:

275 if (flags & ACC_MAIL_FROM_HEAD) {

276 /* usually POP3 accept */

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

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

279 }

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

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

282 g_list_free_1(hdr_node);

283 destroy_header(hdr);

284 break;

285 default:

286 break; /* make compiler happy */

287 }

288 }

289

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

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

292 GList *hdr_list;

293 header *hdr;

294

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

296

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

298 if (!hdr_list)

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

300 if (hdr_list) {

301 gchar *addr;

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

303

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

305

306 addr = g_strdup(hdr->value);

307 g_strchomp(addr);

308

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

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

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

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

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

314 }

315 g_free(addr);

316 }

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

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

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

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

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

322 }

323 }

324

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

326 if (!msg->rcpt_list) {

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

328 return AERR_NORCPT;

329 }

330

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

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

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

334 msg->full_sender_name

335 ?

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

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

338 :

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

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

341 );

342 }

343 if (!has_to_or_cc) {

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

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

346 }

347 if (!has_date) {

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

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

350 }

351 if (!has_id) {

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

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

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

355 }

356 }

357

358 /* Received header: */

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

360 gchar *for_string = NULL;

361 header *hdr = NULL;

362

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

364

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

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

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

368 }

369

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

371 /* received locally */

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

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

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

375 } else {

376 /* received from remote */

377 #ifdef ENABLE_IDENT

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

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

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

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

382 rec_timestamp());

383 #else

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

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

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

387 #endif

388 }

389 header_fold(hdr);

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

391

392 if (for_string)

393 g_free(for_string);

394

395 return AERR_OK;

396 }

397

398 accept_error

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

400 {

401 accept_error err;

402

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

404 if (err == AERR_OK) {

405 err = accept_message_prepare(msg, flags);

406 }

407

408 return err;

409 }