masqmail: 92340177150d src/parse.c

masqmail

view src/parse.c @ 358:92340177150d

Eventually switched the default group from `trusted' to `mail' All systems I run have a group `mail' but no group `trusted'. Also changed the uid/gid to the common values 8/12.

author	markus schnalke <meillo@marmaro.de>
date	Sun, 04 Sep 2011 12:19:41 +0200
parents	00724782b6c9
children	41958685480d

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 #ifndef PARSE_TEST

21 #include "masqmail.h"

22 #endif

24 /* This is really dangerous. I hope that I was careful enough,

25 but maybe there is some malformed address possible that causes

26 this to segfault or be caught in endless loops.

28 If you find something like that, PLEASE mail the string to me

29 (no matter how idiotic it is), so that I can debug that.

30 Those things really should not happen.

31 */

33 static gchar *specials = "()<>@,;:\\\".[]`";

35 char *parse_error = NULL;

37 static gchar*

38 skip_comment(gchar * p)

39 {

41 #ifdef PARSE_TEST

42 g_print("skip_comment: %s\n", p);

43 #endif

45 p++;

46 while (*p && *p != ')') {

47 p++;

48 if (*p == '(') {

49 p = skip_comment(p);

50 }

51 }

52 p++;

54 return p;

55 }

57 static gboolean

58 read_word(gchar * p, gchar ** b, gchar ** e)

59 {

60 #ifdef PARSE_TEST

61 g_print("read_word: %s\n", p);

62 #endif

63 /* eat leading spaces */

64 while (*p && isspace(*p)) {

65 p++;

66 }

68 *b = p;

69 /* b = &p; */

70 if (*p == '\"') {

71 /* quoted-string */

72 p++;

73 while (*p && (*p != '\"')) {

74 p++;

75 }

76 p++;

77 } else {

78 /* atom */

79 while (*p && !strchr(specials, *p) && !iscntrl(*p) && !isspace(*p)) {

80 p++;

81 }

82 }

83 *e = p;

84 return TRUE;

85 }

87 static gboolean

88 read_word_with_dots(gchar * p, gchar ** b, gchar ** e)

89 {

90 gchar *b0 = p;

92 #ifdef PARSE_TEST

93 g_print("read_word_with_dots: %s\n", p);

94 #endif

95 while (TRUE) {

96 if (!read_word(p, b, e)) {

97 return FALSE;

98 }

99 p = *e;

100 if (*p != '.') {

101 break;

102 }

103 p++;

104 }

105 *b = b0;

106 *e = p;

107 return TRUE;

108 }

109

110 static gboolean

111 read_domain(gchar * p, gchar ** b, gchar ** e)

112 {

113 #ifdef PARSE_TEST

114 g_print("read_domain: %s\n", p);

115 #endif

116 *b = p;

117 if (*p != '[') {

118 while (isalnum(*p) || (*p == '-') || (*p == '.')) {

119 p++;

120 }

121 } else {

122 p++;

123 while (isalpha(*p) || (*p == '.')) {

124 p++;

125 }

126 if (*p != ']') {

127 parse_error = g_strdup_printf("']' expected at end of literal address %s", *b);

128 return FALSE;

129 }

130 p++;

131 }

132 *e = p;

133 return TRUE;

134 }

135

136 gboolean

137 parse_address_rfc822(gchar* string, gchar** local_begin, gchar** local_end, gchar** domain_begin,

138 gchar** domain_end, gchar** address_end)

139 {

140 gint angle_brackets = 0;

141

142 gchar *p = string;

143 gchar *b, *e;

144

145 *local_begin = *local_end = NULL;

146 *domain_begin = *domain_end = NULL;

147

148 /* might be some memory left from previous call: */

149 if (parse_error) {

150 g_free(parse_error);

151 parse_error = NULL;

152 }

153

154 /* leading spaces and angle brackets */

155 while (*p && (isspace(*p) || (*p == '<'))) {

156 if (*p == '<') {

157 angle_brackets++;

158 }

159 p++;

160 }

161

162 if (!*p) {

163 return FALSE;

164 }

165

166 while (TRUE) {

167 if (!read_word_with_dots(p, &b, &e)) {

168 return FALSE;

169 }

170

171 p = e;

172 #ifdef PARSE_TEST

173 g_print("after read_word_with_dots: %s\n", p);

174 #endif

175 /* eat white spaces and comments */

176 while ((*p && (isspace(*p))) || (*p == '(')) {

177 if (*p == '(') {

178 if (!(p = skip_comment(p))) {

179 parse_error = g_strdup("missing right bracket ')'");

180 return FALSE;

181 }

182 } else {

183 p++;

184 }

185 }

186 /* we now have a non-space char that is not

187 the beginning of a comment */

188

189 if (*p == '@' || *p == ',') {

190 /* the last word was the local_part of an addr-spec */

191 *local_begin = b;

192 *local_end = e;

193 #ifdef PARSE_TEST

194 g_print("found local part: %s\n", *local_begin);

195 #endif

196 if (*p == '@') {

197 p++; /* skip @ */

198 /* now the domain */

199 if (!read_domain(p, &b, &e)) {

200 return FALSE;

201 }

202 p = e;

203 *domain_begin = b;

204 *domain_end = e;

205 } else {

206 /* unqualified? */

207 /* something like `To: alice, bob' with -t */

208 *domain_begin = *domain_end = NULL;

209 }

210 break;

211

212 } else if (*p == '<') {

213 /* addr-spec follows */

214 while (isspace(*p) || (*p == '<')) {

215 if (*p == '<') {

216 angle_brackets++;

217 }

218 p++;

219 }

220 if (!read_word_with_dots(p, &b, &e)) {

221 return FALSE;

222 }

223 p = e;

224 *local_begin = b;

225 *local_end = e;

226 #ifdef PARSE_TEST

227 g_print("found local part: %s\n", *local_begin);

228 #endif

229 if (*p == '@') {

230 p++;

231 if (!read_domain(p, &b, &e)) {

232 return FALSE;

233 }

234 p = e;

235 *domain_begin = b;

236 *domain_end = e;

237 } else {

238 /* may be unqualified address */

239 *domain_begin = *domain_end = NULL;

240 }

241 break;

242

243 } else if (!*p || *p == '>') {

244 *local_begin = b;

245 *local_end = e;

246 #ifdef PARSE_TEST

247 g_print("found local part: %s\n", *local_begin);

248 #endif

249 *domain_begin = *domain_end = NULL;

250 break;

251

252 } else if (strchr(specials, *p) || iscntrl(*p) || isspace(*p)) {

253 parse_error = g_strdup_printf("unexpected character: %c", *p);

254 #ifdef PARSE_TEST

255 g_print("unexpected character: %c", *p);

256 #endif

257 return FALSE;

258 }

259 }

260

261 /* trailing spaces and angle brackets */

262 #ifdef PARSE_TEST

263 g_print("down counting trailing '>'\n");

264 #endif

265 while (*p && (isspace(*p) || (*p == '>'))) {

266 if (*p == '>') {

267 angle_brackets--;

268 }

269 p++;

270 }

271

272 *address_end = p;

273

274 if (angle_brackets > 0) {

275 parse_error = g_strdup("missing '>' at end of string");

276 return FALSE;

277 } else if (angle_brackets < 0) {

278 parse_error = g_strdup("superfluous '>' at end of string");

279 return FALSE;

280 }

281

282 /* we successfully parsed the address */

283 return TRUE;

284 }

285

286 gboolean

287 parse_address_rfc821(gchar* string, gchar** local_begin, gchar** local_end, gchar** domain_begin,

288 gchar** domain_end, gchar** address_end)

289 {

290 gint angle_brackets = 0;

291

292 gchar *p = string;

293 gchar *b, *e;

294

295 *local_begin = *local_end = NULL;

296 *domain_begin = *domain_end = NULL;

297

298 /* might be some memory left from previous call: */

299 if (parse_error != NULL) {

300 g_free(parse_error);

301 parse_error = NULL;

302 }

303

304 /* leading spaces and angle brackets */

305 while (*p && (isspace(*p) || (*p == '<'))) {

306 if (*p == '<') {

307 angle_brackets++;

308 }

309 p++;

310 }

311

312 if (!*p) {

313 return FALSE;

314 }

315

316 while (TRUE) {

317 if (!read_word_with_dots(p, &b, &e)) {

318 return FALSE;

319 }

320

321 p = e;

322 #ifdef PARSE_TEST

323 g_print("after read_word_with_dots: %s\n", p);

324 #endif

325 *local_begin = b;

326 *local_end = e;

327 #ifdef PARSE_TEST

328 g_print("found local part: %s\n", *local_begin);

329 g_print("local_end = %s\n", *local_end);

330 #endif

331 if (!(*p) || isspace(*p) || (*p == '>')) {

332 /* unqualified ? */

333 domain_begin = domain_end = NULL;

334 break;

335 } else if (*p == '@') {

336 p++;

337 if (read_domain(p, &b, &e)) {

338 p = e;

339 *domain_begin = b;

340 *domain_end = e;

341 }

342 break;

343 } else {

344 parse_error = g_strdup_printf ("unexpected character after local part '%c'", *p);

345 return FALSE;

346 }

347 }

348

349 /* trailing spaces and angle brackets */

350 #ifdef PARSE_TEST

351 g_print("down counting trailing '>'\n");

352 #endif

353 while (*p && (isspace(*p) || (*p == '>'))) {

354 if (*p == '>') {

355 angle_brackets--;

356 }

357 p++;

358 }

359 *address_end = p;

360

361 if (angle_brackets > 0) {

362 parse_error = g_strdup("missing '>' at end of string");

363 return FALSE;

364 } else if (angle_brackets < 0) {

365 parse_error = g_strdup("superfluous '>' at end of string");

366 return FALSE;

367 }

368

369 /* we successfully parsed the address */

370 return TRUE;

371 }

372

373 /*

374 allocate address, reading from string.

375 On failure, returns NULL.

376 after call, end contains a pointer to the end of the parsed string

377 end may be NULL, if we are not interested.

378

379 parses both rfc 821 and rfc 822 addresses, depending on flag is_rfc821

380 */

381 address*

382 _create_address(gchar * string, gchar ** end, gboolean is_rfc821)

383 {

384 gchar *loc_beg, *loc_end;

385 gchar *dom_beg, *dom_end;

386 gchar *addr_end;

387 gboolean ret;

388

389 /* TODO: what about (string == NULL)? */

390 if (string && (string[0] == '\0')) {

391 address *addr = g_malloc(sizeof(address));

392 addr->address = g_strdup("");

393 addr->local_part = g_strdup("");

394 /* 'NULL' address (failure notice),

395 "" makes sure it will not be qualified with a hostname */

396 addr->domain = g_strdup("");

397 return addr;

398 }

399

400 if (is_rfc821) {

401 ret = parse_address_rfc821(string, &loc_beg, &loc_end, &dom_beg, &dom_end, &addr_end);

402 } else {

403 ret = parse_address_rfc822(string, &loc_beg, &loc_end, &dom_beg, &dom_end, &addr_end);

404 }

405 if (!ret) {

406 return NULL;

407 }

408

409 address *addr = g_malloc(sizeof(address));

410 gchar *p = addr_end;

411

412 memset(addr, 0, sizeof(address));

413

414 if (loc_beg[0] == '|') {

415 parse_error = g_strdup("no pipe allowed for RFC 822/821 address");

416 return NULL;

417 }

418

419 while (*p && (*p != ',')) {

420 p++;

421 }

422 addr->address = g_strndup(string, p - string);

423 addr->local_part = g_strndup(loc_beg, loc_end - loc_beg);

424

425 #ifdef PARSE_TEST

426 g_print("addr->local_part = %s\n", addr->local_part);

427 #endif

428

429 if (dom_beg != NULL) {

430 addr->domain = g_strndup(dom_beg, dom_end - dom_beg);

431 } else if (addr->local_part[0] == '\0') {

432 /* 'NULL' address (failure notice),

433 "" makes sure it will not be qualified with a hostname */

434 addr->domain = g_strdup("");

435 } else {

436 addr->domain = NULL;

437 }

438

439 if (end) {

440 *end = p;

441 }

442

443 #ifndef PARSE_TEST

444 addr_unmark_delivered(addr);

445 #endif

446

447 return addr;

448 }

449

450 address*

451 create_address_rfc822(gchar * string, gchar ** end)

452 {

453 return _create_address(string, end, FALSE);

454 }

455

456 address*

457 create_address_rfc821(gchar * string, gchar ** end)

458 {

459 return _create_address(string, end, TRUE);

460 }

461

462 GList*

463 addr_list_append_rfc822(GList * addr_list, gchar * string, gchar * domain)

464 {

465 gchar *p = string;

466 gchar *end;

467

468 while (*p) {

469 #ifdef PARSE_TEST

470 g_print("string: %s\n", p);

471 #endif

472

473 address *addr = _create_address(p, &end, FALSE);

474 if (!addr) {

475 break;

476 }

477

478 #ifdef PARSE_TEST

479 g_print("addr: %s (%s<@>%s)", addr->address, addr->local_part, addr->domain);

480 #endif

481 if (domain && !addr->domain) {

482 addr->domain = g_strdup(domain);

483 }

484 #ifdef PARSE_TEST

485 g_print(" (%s<@>%s)\n", addr->local_part, addr->domain);

486 #endif

487

488 addr_list = g_list_append(addr_list, addr);

489 p = end;

490

491 while (*p == ',' || isspace(*p)) {

492 p++;

493 }

494 }

495 return addr_list;

496 }