masqmail: a408411ff8df src/accept.c

masqmail

view src/accept.c @ 387:a408411ff8df

Added a glob-pattern aliasing facility. One use-case is virtual hosting another catch-all maildrops, but you may use it as a more flexible aliasing mechanism as well.

author	markus schnalke <meillo@marmaro.de>
date	Sat, 18 Feb 2012 12:35:12 +0100
parents	9bc3e47b0222
children	aa40710f09fe

line source

1 /*

2 ** MasqMail

5 **

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

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

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

9 ** (at your option) any later version.

10 **

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

12 ** but WITHOUT ANY WARRANTY; without even the implied warranty of

13 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

14 ** GNU General Public License for more details.

15 **

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

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

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

19 */

21 #include "masqmail.h"

22 #include "readsock.h"

24 /* must match PROT_* in masqmail.h */

25 gchar *prot_names[] = {

26 "local",

27 "SMTP",

28 "ESMTP",

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 /*

46 ** accept message from anywhere.

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

48 **

49 ** The -t option: With the ACC_RCPT_FROM_HEAD flag the addrs found found

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

51 */

53 accept_error

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

55 {

56 gchar *line, *line1;

57 int line_size = MAX_DATALINE;

58 gboolean in_headers = TRUE;

59 header *hdr = NULL;

60 gint line_cnt = 0, data_size = 0;

62 line = g_malloc(line_size);

63 line[0] = '\0';

65 while (TRUE) {

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

68 line1 = line;

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

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

72 g_free(line);

73 break;

74 }

75 line1++;

76 }

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

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

80 gint len1 = strlen(line1);

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

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

83 line1[len1] = '\n';

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

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

86 data_size += strlen(line1);

87 line_cnt++;

88 }

89 }

90 break;

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

93 g_free(line);

94 return AERR_EOF;

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

97 /* should not happen any more */

98 g_free(line);

99 return AERR_OVERFLOW;

100

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

102 g_free(line);

103 return AERR_TIMEOUT;

104

105 } else if (len <= 0) {

106 /* does not happen */

107 g_free(line);

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

109 return AERR_UNKNOWN;

110

111 }

112

113 if (in_headers) {

114

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

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

117 continue;

118 }

119

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

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

122 if (hdr) {

123 char *cp;

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

125 hdr->value = cp + (hdr->value - hdr->header);

126 free(hdr->header);

127 hdr->header = cp;

128 }

129

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

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

132 in_headers = FALSE;

133 } else {

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

135 if ((hdr = get_header(line1))) {

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

137 } else {

138 /*

139 ** if get_header() returns NULL,

140 ** no header was recognized,

141 ** so this seems to be the first

142 ** data line of a broken mailer

143 ** which does not send an empty

144 ** line after the headers

145 */

146 in_headers = FALSE;

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

148 }

149 }

150 } else {

151 /* message body */

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

153 data_size += strlen(line1);

154 line_cnt++;

155 }

156

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

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

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

160 data_size, conf.max_msg_size);

161 return AERR_SIZE;

162 }

163

164 }

165

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

167

168 if (!msg->data_list) {

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

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

171 }

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

173

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

175

176 msg->data_size = data_size;

177 msg->received_time = time(NULL);

178

179 return AERR_OK;

180 }

181

182 accept_error

183 accept_message_prepare(message *msg, guint flags)

184 {

185 struct passwd *passwd = NULL;

186 time_t rec_time = time(NULL);

187

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

189

190 /* create unique message id */

191 msg->uid = g_malloc(14);

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

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

194 string_base62(msg->uid + 7, getpid(), 3);

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

196 string_base62(msg->uid + 11, msg->transfer_id, 2);

197 msg->uid[13] = '\0';

198

199 /* if local, get password entry and set return path if missing */

200 if (!msg->received_host) {

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

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

203 if (!msg->return_path) {

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

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

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

207 g_free(path);

208 }

209 }

210

211 /* scan headers */

212 {

213 gboolean has_id = FALSE;

214 gboolean has_date = FALSE;

215 gboolean has_sender = FALSE;

216 gboolean has_from = FALSE;

217 gboolean has_to_or_cc = FALSE;

218 GList *hdr_node, *hdr_node_next;

219 header *hdr;

220

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

222 hdr_node;

223 hdr_node = hdr_node_next) {

224 hdr_node_next = g_list_next(hdr_node);

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

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

227 switch (hdr->id) {

228 case HEAD_MESSAGE_ID:

229 has_id = TRUE;

230 break;

231 case HEAD_DATE:

232 has_date = TRUE;

233 break;

234 case HEAD_FROM:

235 has_from = TRUE;

236 break;

237 case HEAD_SENDER:

238 has_sender = TRUE;

239 break;

240 case HEAD_TO:

241 case HEAD_CC:

242 has_to_or_cc = TRUE;

243 /* fall through */

244 case HEAD_BCC:

245 if (flags & ACC_RCPT_FROM_HEAD) {

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

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

248 if (hdr->value) {

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

250 }

251 }

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

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

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

255 g_list_free_1(hdr_node);

256 destroy_header(hdr);

257 }

258 break;

259 case HEAD_ENVELOPE_TO:

260 if (flags & ACC_SAVE_ENVELOPE_TO) {

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

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

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

264 }

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

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

267 g_list_free_1(hdr_node);

268 destroy_header(hdr);

269 break;

270 case HEAD_RETURN_PATH:

271 if (flags & ACC_MAIL_FROM_HEAD) {

272 /* usually POP3 accept */

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

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

275 }

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

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

278 g_list_free_1(hdr_node);

279 destroy_header(hdr);

280 break;

281 default:

282 break; /* make compiler happy */

283 }

284 }

285

286 if (!msg->return_path) {

287 /*

288 ** TODO: do we still need this as we don't fetch

289 ** mail anymore?

290 ** This can happen for pop3 accept only and if no

291 ** Return-Path: header was given

292 */

293 GList *hdr_list;

294 header *hdr;

295

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

297

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

299 if (!hdr_list) {

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

301 }

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 msg->return_path = create_address_qualified(addr, FALSE, msg->received_host);

312 if (msg->return_path) {

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

314 msg->hdr_list = g_list_append( msg->hdr_list, create_header(HEAD_UNKNOWN, "X-Warning: return path set from %s address\n", hdr->id == HEAD_SENDER ? "Sender:" : "From:"));

315 }

316 g_free(addr);

317 }

318 if (!msg->return_path) {

319 /* no Sender: or From: or

320 create_address_qualified failed */

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

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

323 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN, "X-Warning: real return path is unknown\n"));

324 }

325 }

326

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

328 if (!msg->rcpt_list) {

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

330 return AERR_NORCPT;

331 }

332

333 if (!has_sender && !has_from) {

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

335 if (msg->full_sender_name) {

336 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_FROM, "From: \"%s\" <%s@%s>\n", msg->full_sender_name, msg->return_path->local_part, msg->return_path->domain));

337 } else {

338 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_FROM, "From: <%s@%s>\n", msg->return_path->local_part, msg->return_path->domain));

339 }

340 }

341 if (!has_to_or_cc) {

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

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

344 }

345 if (!has_date) {

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

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

348 }

349 if (!has_id) {

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