Commit | Line | Data |
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1d1ccf4f MW |
1 | /* -*-c-*- |
2 | * | |
3 | * Make programs use Unix-domain sockets instead of IP | |
4 | * | |
5 | * (c) 2008 Straylight/Edgeware | |
6 | */ | |
7 | ||
8 | /*----- Licensing notice --------------------------------------------------* | |
9 | * | |
10 | * This file is part of the preload-hacks package. | |
11 | * | |
12 | * Preload-hacks are free software; you can redistribute it and/or modify | |
13 | * them under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or (at | |
15 | * your option) any later version. | |
16 | * | |
de6df72d MW |
17 | * Preload-hacks are distributed in the hope that it will be useful, but |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
19 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
20 | * for more details. | |
1d1ccf4f MW |
21 | * |
22 | * You should have received a copy of the GNU General Public License along | |
de6df72d MW |
23 | * with preload-hacks; if not, write to the Free Software Foundation, Inc., |
24 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
1d1ccf4f MW |
25 | */ |
26 | ||
e4976bb0 | 27 | #define _GNU_SOURCE |
28 | #undef sun | |
29 | #undef SUN | |
30 | #define DEBUG | |
31 | ||
1d1ccf4f MW |
32 | /*----- Header files ------------------------------------------------------*/ |
33 | ||
9314b85a | 34 | #include <assert.h> |
e4976bb0 | 35 | #include <ctype.h> |
36 | #include <errno.h> | |
9314b85a | 37 | #include <stddef.h> |
e4976bb0 | 38 | #include <stdio.h> |
39 | #include <stdlib.h> | |
40 | ||
41 | #include <unistd.h> | |
42 | #include <dirent.h> | |
43 | #include <dlfcn.h> | |
44 | #include <fcntl.h> | |
45 | #include <pwd.h> | |
46 | ||
47 | #include <sys/ioctl.h> | |
48 | #include <sys/socket.h> | |
49 | #include <sys/stat.h> | |
50 | #include <sys/un.h> | |
51 | ||
52 | #include <netinet/in.h> | |
53 | #include <arpa/inet.h> | |
54 | #include <netinet/tcp.h> | |
55 | #include <netinet/udp.h> | |
9f1396d9 | 56 | #include <ifaddrs.h> |
9314b85a | 57 | #include <netdb.h> |
e4976bb0 | 58 | |
1d1ccf4f MW |
59 | /*----- Data structures ---------------------------------------------------*/ |
60 | ||
61 | enum { UNUSED, STALE, USED }; /* Unix socket status values */ | |
62 | enum { WANT_FRESH, WANT_EXISTING }; /* Socket address dispositions */ | |
63 | enum { DENY, ALLOW }; /* ACL verdicts */ | |
64 | ||
2a06ea0b | 65 | static int address_families[] = { AF_INET, AF_INET6, -1 }; |
9314b85a MW |
66 | |
67 | #define ADDRBUFSZ 64 | |
68 | ||
69 | /* Address representations. */ | |
70 | typedef union ipaddr { | |
71 | struct in_addr v4; | |
2a06ea0b | 72 | struct in6_addr v6; |
9314b85a MW |
73 | } ipaddr; |
74 | ||
75 | /* Convenient socket address hacking. */ | |
76 | typedef union address { | |
77 | struct sockaddr sa; | |
78 | struct sockaddr_in sin; | |
2a06ea0b | 79 | struct sockaddr_in6 sin6; |
9314b85a MW |
80 | } address; |
81 | ||
1d1ccf4f | 82 | /* Access control list nodes */ |
e4976bb0 | 83 | typedef struct aclnode { |
84 | struct aclnode *next; | |
85 | int act; | |
9314b85a MW |
86 | int af; |
87 | ipaddr minaddr, maxaddr; | |
e4976bb0 | 88 | unsigned short minport, maxport; |
89 | } aclnode; | |
90 | ||
1d1ccf4f | 91 | /* Local address records */ |
9314b85a MW |
92 | typedef struct full_ipaddr { |
93 | int af; | |
94 | ipaddr addr; | |
95 | } full_ipaddr; | |
2a06ea0b | 96 | #define MAX_LOCAL_IPADDRS 64 |
9314b85a | 97 | static full_ipaddr local_ipaddrs[MAX_LOCAL_IPADDRS]; |
e4976bb0 | 98 | static int n_local_ipaddrs; |
99 | ||
1d1ccf4f | 100 | /* General configuration */ |
e4976bb0 | 101 | static uid_t uid; |
102 | static char *sockdir = 0; | |
103 | static int debug = 0; | |
f6049fdd | 104 | static unsigned minautoport = 16384, maxautoport = 65536; |
e4976bb0 | 105 | |
1d1ccf4f | 106 | /* Access control lists */ |
e4976bb0 | 107 | static aclnode *bind_real, **bind_tail = &bind_real; |
108 | static aclnode *connect_real, **connect_tail = &connect_real; | |
109 | ||
1d1ccf4f | 110 | /*----- Import the real versions of functions -----------------------------*/ |
e4976bb0 | 111 | |
1d1ccf4f | 112 | /* The list of functions to immport. */ |
e4976bb0 | 113 | #define IMPORTS(_) \ |
114 | _(socket, int, (int, int, int)) \ | |
115 | _(socketpair, int, (int, int, int, int *)) \ | |
116 | _(connect, int, (int, const struct sockaddr *, socklen_t)) \ | |
117 | _(bind, int, (int, const struct sockaddr *, socklen_t)) \ | |
118 | _(accept, int, (int, struct sockaddr *, socklen_t *)) \ | |
119 | _(getsockname, int, (int, struct sockaddr *, socklen_t *)) \ | |
120 | _(getpeername, int, (int, struct sockaddr *, socklen_t *)) \ | |
121 | _(getsockopt, int, (int, int, int, void *, socklen_t *)) \ | |
122 | _(setsockopt, int, (int, int, int, const void *, socklen_t)) \ | |
123 | _(sendto, ssize_t, (int, const void *buf, size_t, int, \ | |
124 | const struct sockaddr *to, socklen_t tolen)) \ | |
125 | _(recvfrom, ssize_t, (int, void *buf, size_t, int, \ | |
7d769c69 | 126 | struct sockaddr *from, socklen_t *fromlen)) \ |
e4976bb0 | 127 | _(sendmsg, ssize_t, (int, const struct msghdr *, int)) \ |
9fb8e5c9 | 128 | _(recvmsg, ssize_t, (int, struct msghdr *, int)) |
e4976bb0 | 129 | |
1d1ccf4f | 130 | /* Function pointers to set up. */ |
e4976bb0 | 131 | #define DECL(imp, ret, args) static ret (*real_##imp) args; |
132 | IMPORTS(DECL) | |
133 | #undef DECL | |
134 | ||
1d1ccf4f | 135 | /* Import the system calls. */ |
e4976bb0 | 136 | static void import(void) |
137 | { | |
138 | #define IMPORT(imp, ret, args) \ | |
139 | real_##imp = (ret (*)args)dlsym(RTLD_NEXT, #imp); | |
140 | IMPORTS(IMPORT) | |
141 | #undef IMPORT | |
142 | } | |
143 | ||
1d1ccf4f | 144 | /*----- Utilities ---------------------------------------------------------*/ |
e4976bb0 | 145 | |
1d1ccf4f | 146 | /* Socket address casts */ |
e4976bb0 | 147 | #define SA(sa) ((struct sockaddr *)(sa)) |
148 | #define SIN(sa) ((struct sockaddr_in *)(sa)) | |
2a06ea0b | 149 | #define SIN6(sa) ((struct sockaddr_in6 *)(sa)) |
e4976bb0 | 150 | #define SUN(sa) ((struct sockaddr_un *)(sa)) |
151 | ||
1d1ccf4f | 152 | /* Raw bytes */ |
e4976bb0 | 153 | #define UC(ch) ((unsigned char)(ch)) |
154 | ||
1d1ccf4f | 155 | /* Memory allocation */ |
e4976bb0 | 156 | #define NEW(x) ((x) = xmalloc(sizeof(*x))) |
157 | #define NEWV(x, n) ((x) = xmalloc(sizeof(*x) * (n))) | |
158 | ||
1d1ccf4f | 159 | /* Debugging */ |
e4976bb0 | 160 | #ifdef DEBUG |
161 | # define D(body) { if (debug) { body } } | |
162 | #else | |
163 | # define D(body) ; | |
164 | #endif | |
165 | ||
1d1ccf4f | 166 | /* Preservation of error status */ |
e4976bb0 | 167 | #define PRESERVING_ERRNO(body) do { \ |
168 | int _err = errno; { body } errno = _err; \ | |
169 | } while (0) | |
170 | ||
1d1ccf4f | 171 | /* Allocate N bytes of memory; abort on failure. */ |
e4976bb0 | 172 | static void *xmalloc(size_t n) |
173 | { | |
174 | void *p; | |
175 | if (!n) return (0); | |
3ef1fec9 | 176 | if ((p = malloc(n)) == 0) { perror("malloc"); exit(127); } |
e4976bb0 | 177 | return (p); |
178 | } | |
179 | ||
1d1ccf4f | 180 | /* Allocate a copy of the null-terminated string P; abort on failure. */ |
e4976bb0 | 181 | static char *xstrdup(const char *p) |
182 | { | |
183 | size_t n = strlen(p) + 1; | |
184 | char *q = xmalloc(n); | |
185 | memcpy(q, p, n); | |
186 | return (q); | |
187 | } | |
9314b85a MW |
188 | |
189 | /*----- Address-type hacking ----------------------------------------------*/ | |
190 | ||
191 | /* If M is a simple mask, i.e., consists of a sequence of zero bits followed | |
192 | * by a sequence of one bits, then return the length of the latter sequence | |
193 | * (which may be zero); otherwise return -1. | |
194 | */ | |
195 | static int simple_mask_length(unsigned long m) | |
196 | { | |
197 | int n = 0; | |
198 | ||
199 | while (m & 1) { n++; m >>= 1; } | |
200 | return (m ? -1 : n); | |
201 | } | |
202 | ||
203 | /* Answer whether AF is an interesting address family. */ | |
204 | static int family_known_p(int af) | |
205 | { | |
206 | switch (af) { | |
207 | case AF_INET: | |
2a06ea0b | 208 | case AF_INET6: |
9314b85a MW |
209 | return (1); |
210 | default: | |
211 | return (0); | |
212 | } | |
213 | } | |
214 | ||
215 | /* Return the socket address length for address family AF. */ | |
216 | static socklen_t family_socklen(int af) | |
217 | { | |
218 | switch (af) { | |
219 | case AF_INET: return (sizeof(struct sockaddr_in)); | |
2a06ea0b | 220 | case AF_INET6: return (sizeof(struct sockaddr_in6)); |
9314b85a MW |
221 | default: abort(); |
222 | } | |
223 | } | |
224 | ||
225 | /* Return the width of addresses of kind AF. */ | |
226 | static int address_width(int af) | |
227 | { | |
228 | switch (af) { | |
229 | case AF_INET: return 32; | |
2a06ea0b | 230 | case AF_INET6: return 128; |
9314b85a MW |
231 | default: abort(); |
232 | } | |
233 | } | |
234 | ||
235 | /* If addresses A and B share a common prefix then return its length; | |
236 | * otherwise return -1. | |
237 | */ | |
238 | static int common_prefix_length(int af, const ipaddr *a, const ipaddr *b) | |
239 | { | |
240 | switch (af) { | |
241 | case AF_INET: { | |
242 | unsigned long aa = ntohl(a->v4.s_addr), bb = ntohl(b->v4.s_addr); | |
243 | unsigned long m = aa^bb; | |
244 | if ((aa&m) == 0 && (bb&m) == m) return (32 - simple_mask_length(m)); | |
245 | else return (-1); | |
246 | } break; | |
2a06ea0b MW |
247 | case AF_INET6: { |
248 | const uint8_t *aa = a->v6.s6_addr, *bb = b->v6.s6_addr; | |
249 | unsigned m; | |
250 | unsigned n; | |
251 | int i; | |
252 | ||
253 | for (i = 0; i < 16 && aa[i] == bb[i]; i++); | |
254 | n = 8*i; | |
255 | if (i < 16) { | |
256 | m = aa[i]^bb[i]; | |
257 | if ((aa[i]&m) != 0 || (bb[i]&m) != m) return (-1); | |
258 | n += 8 - simple_mask_length(m); | |
259 | for (i++; i < 16; i++) | |
260 | if (aa[i] || bb[i] != 0xff) return (-1); | |
261 | } | |
262 | return (n); | |
263 | } break; | |
9314b85a MW |
264 | default: |
265 | abort(); | |
266 | } | |
267 | } | |
268 | ||
269 | /* Extract the port number (in host byte-order) from SA. */ | |
270 | static int port_from_sockaddr(const struct sockaddr *sa) | |
271 | { | |
272 | switch (sa->sa_family) { | |
273 | case AF_INET: return (ntohs(SIN(sa)->sin_port)); | |
2a06ea0b | 274 | case AF_INET6: return (ntohs(SIN6(sa)->sin6_port)); |
9314b85a MW |
275 | default: abort(); |
276 | } | |
277 | } | |
278 | ||
279 | /* Store the port number PORT (in host byte-order) in SA. */ | |
280 | static void port_to_sockaddr(struct sockaddr *sa, int port) | |
281 | { | |
282 | switch (sa->sa_family) { | |
283 | case AF_INET: SIN(sa)->sin_port = htons(port); break; | |
2a06ea0b | 284 | case AF_INET6: SIN6(sa)->sin6_port = htons(port); break; |
9314b85a MW |
285 | default: abort(); |
286 | } | |
287 | } | |
288 | /* Extract the address part from SA and store it in A. */ | |
289 | static void ipaddr_from_sockaddr(ipaddr *a, const struct sockaddr *sa) | |
290 | { | |
291 | switch (sa->sa_family) { | |
292 | case AF_INET: a->v4 = SIN(sa)->sin_addr; break; | |
2a06ea0b | 293 | case AF_INET6: a->v6 = SIN6(sa)->sin6_addr; break; |
9314b85a MW |
294 | default: abort(); |
295 | } | |
296 | } | |
297 | ||
298 | /* Copy a whole socket address about. */ | |
299 | static void copy_sockaddr(struct sockaddr *sa_dst, | |
300 | const struct sockaddr *sa_src) | |
301 | { memcpy(sa_dst, sa_src, family_socklen(sa_src->sa_family)); } | |
302 | ||
303 | /* Answer whether two addresses are equal. */ | |
304 | static int ipaddr_equal_p(int af, const ipaddr *a, const ipaddr *b) | |
305 | { | |
306 | switch (af) { | |
307 | case AF_INET: return (a->v4.s_addr == b->v4.s_addr); | |
2a06ea0b | 308 | case AF_INET6: return (memcmp(a->v6.s6_addr, b->v6.s6_addr, 16) == 0); |
9314b85a MW |
309 | default: abort(); |
310 | } | |
311 | } | |
312 | ||
313 | /* Answer whether the address part of SA is between A and B (inclusive). We | |
314 | * assume that SA has the correct address family. | |
315 | */ | |
316 | static int sockaddr_in_range_p(const struct sockaddr *sa, | |
317 | const ipaddr *a, const ipaddr *b) | |
318 | { | |
319 | switch (sa->sa_family) { | |
320 | case AF_INET: { | |
321 | unsigned long addr = ntohl(SIN(sa)->sin_addr.s_addr); | |
322 | return (ntohl(a->v4.s_addr) <= addr && | |
323 | addr <= ntohl(b->v4.s_addr)); | |
324 | } break; | |
2a06ea0b MW |
325 | case AF_INET6: { |
326 | const uint8_t *ss = SIN6(sa)->sin6_addr.s6_addr; | |
327 | const uint8_t *aa = a->v6.s6_addr, *bb = b->v6.s6_addr; | |
328 | int h = 1, l = 1; | |
329 | int i; | |
330 | ||
331 | for (i = 0; h && l && i < 16; i++, ss++, aa++, bb++) { | |
332 | if (*ss < *aa || *bb < *ss) return (0); | |
333 | if (*aa < *ss) l = 0; | |
334 | if (*ss < *bb) h = 0; | |
335 | } | |
336 | return (1); | |
337 | } break; | |
9314b85a MW |
338 | default: |
339 | abort(); | |
340 | } | |
341 | } | |
342 | ||
343 | /* Fill in SA with the appropriate wildcard address. */ | |
344 | static void wildcard_address(int af, struct sockaddr *sa) | |
345 | { | |
346 | switch (af) { | |
347 | case AF_INET: { | |
348 | struct sockaddr_in *sin = SIN(sa); | |
349 | memset(sin, 0, sizeof(*sin)); | |
350 | sin->sin_family = AF_INET; | |
351 | sin->sin_port = 0; | |
352 | sin->sin_addr.s_addr = INADDR_ANY; | |
353 | } break; | |
2a06ea0b MW |
354 | case AF_INET6: { |
355 | struct sockaddr_in6 *sin6 = SIN6(sa); | |
356 | memset(sin6, 0, sizeof(sin6)); | |
357 | sin6->sin6_family = AF_INET6; | |
358 | sin6->sin6_port = 0; | |
359 | sin6->sin6_addr = in6addr_any; | |
360 | sin6->sin6_scope_id = 0; | |
361 | sin6->sin6_flowinfo = 0; | |
362 | } break; | |
9314b85a MW |
363 | default: |
364 | abort(); | |
365 | } | |
366 | } | |
367 | ||
368 | /* Mask the address A, forcing all but the top PLEN bits to zero or one | |
369 | * according to HIGHP. | |
370 | */ | |
371 | static void mask_address(int af, ipaddr *a, int plen, int highp) | |
372 | { | |
373 | switch (af) { | |
374 | case AF_INET: { | |
375 | unsigned long addr = ntohl(a->v4.s_addr); | |
376 | unsigned long mask = plen ? ~0ul << (32 - plen) : 0; | |
377 | addr &= mask; | |
378 | if (highp) addr |= ~mask; | |
379 | a->v4.s_addr = htonl(addr & 0xffffffff); | |
380 | } break; | |
2a06ea0b MW |
381 | case AF_INET6: { |
382 | int i = plen/8; | |
383 | unsigned m = (0xff << (8 - plen%8)) & 0xff; | |
384 | unsigned s = highp ? 0xff : 0; | |
385 | if (m) { | |
386 | a->v6.s6_addr[i] = (a->v6.s6_addr[i] & m) | (s & ~m); | |
387 | i++; | |
388 | } | |
389 | for (; i < 16; i++) a->v6.s6_addr[i] = s; | |
390 | } break; | |
9314b85a MW |
391 | default: |
392 | abort(); | |
393 | } | |
394 | } | |
395 | ||
396 | /* Write a presentation form of SA to BUF, a buffer of length SZ. LEN is the | |
397 | * address length; if it's zero, look it up based on the address family. | |
398 | * Return a pointer to the string (which might, in an emergency, be a static | |
399 | * string rather than your buffer). | |
400 | */ | |
401 | static char *present_sockaddr(const struct sockaddr *sa, socklen_t len, | |
402 | char *buf, size_t sz) | |
403 | { | |
404 | #define WANT(n_) do { if (sz < (n_)) goto nospace; } while (0) | |
405 | #define PUTC(c_) do { *buf++ = (c_); sz--; } while (0) | |
406 | ||
407 | if (!sz) return "<no-space-in-buffer>"; | |
408 | if (!len) len = family_socklen(sa->sa_family); | |
409 | ||
410 | switch (sa->sa_family) { | |
411 | case AF_UNIX: { | |
412 | struct sockaddr_un *sun = SUN(sa); | |
413 | char *p = sun->sun_path; | |
414 | size_t n = len - offsetof(struct sockaddr_un, sun_path); | |
415 | ||
416 | assert(n); | |
417 | if (*p == 0) { | |
418 | WANT(1); PUTC('@'); | |
419 | p++; n--; | |
420 | while (n) { | |
421 | switch (*p) { | |
422 | case 0: WANT(2); PUTC('\\'); PUTC('0'); break; | |
423 | case '\a': WANT(2); PUTC('\\'); PUTC('a'); break; | |
424 | case '\n': WANT(2); PUTC('\\'); PUTC('n'); break; | |
425 | case '\r': WANT(2); PUTC('\\'); PUTC('r'); break; | |
426 | case '\t': WANT(2); PUTC('\\'); PUTC('t'); break; | |
427 | case '\v': WANT(2); PUTC('\\'); PUTC('v'); break; | |
428 | case '\\': WANT(2); PUTC('\\'); PUTC('\\'); break; | |
429 | default: | |
430 | if (*p > ' ' && *p <= '~') | |
431 | { WANT(1); PUTC(*p); } | |
432 | else { | |
433 | WANT(4); PUTC('\\'); PUTC('x'); | |
434 | PUTC((*p >> 4)&0xf); PUTC((*p >> 0)&0xf); | |
435 | } | |
436 | break; | |
437 | } | |
438 | p++; n--; | |
439 | } | |
440 | } else { | |
441 | if (*p != '/') { WANT(2); PUTC('.'); PUTC('/'); } | |
442 | while (n && *p) { WANT(1); PUTC(*p); p++; n--; } | |
443 | } | |
444 | WANT(1); PUTC(0); | |
445 | } break; | |
2a06ea0b | 446 | case AF_INET: case AF_INET6: { |
9314b85a MW |
447 | char addrbuf[NI_MAXHOST], portbuf[NI_MAXSERV]; |
448 | int err = getnameinfo(sa, len, | |
449 | addrbuf, sizeof(addrbuf), | |
450 | portbuf, sizeof(portbuf), | |
451 | NI_NUMERICHOST | NI_NUMERICSERV); | |
452 | assert(!err); | |
453 | snprintf(buf, sz, strchr(addrbuf, ':') ? "[%s]:%s" : "%s:%s", | |
454 | addrbuf, portbuf); | |
455 | } break; | |
456 | default: | |
457 | snprintf(buf, sz, "<unknown-address-family %d>", sa->sa_family); | |
458 | break; | |
459 | } | |
460 | return (buf); | |
461 | ||
462 | nospace: | |
463 | buf[sz - 1] = 0; | |
464 | return (buf); | |
465 | } | |
466 | ||
467 | /* Guess the family of a textual socket address. */ | |
468 | static int guess_address_family(const char *p) | |
2a06ea0b | 469 | { return (strchr(p, ':') ? AF_INET6 : AF_INET); } |
9314b85a MW |
470 | |
471 | /* Parse a socket address P and write the result to SA. */ | |
472 | static int parse_sockaddr(struct sockaddr *sa, const char *p) | |
473 | { | |
474 | char buf[ADDRBUFSZ]; | |
475 | char *q; | |
476 | struct addrinfo *ai, ai_hint = { 0 }; | |
477 | ||
478 | if (strlen(p) >= sizeof(buf) - 1) return (-1); | |
479 | strcpy(buf, p); p = buf; | |
480 | if (*p != '[') { | |
481 | if ((q = strchr(p, ':')) == 0) return (-1); | |
482 | *q++ = 0; | |
483 | } else { | |
484 | p++; | |
485 | if ((q = strchr(p, ']')) == 0) return (-1); | |
486 | *q++ = 0; | |
487 | if (*q != ':') return (-1); | |
488 | q++; | |
489 | } | |
490 | ||
491 | ai_hint.ai_family = AF_UNSPEC; | |
492 | ai_hint.ai_socktype = SOCK_DGRAM; | |
493 | ai_hint.ai_flags = AI_NUMERICHOST | AI_NUMERICSERV; | |
494 | if (getaddrinfo(p, q, &ai_hint, &ai)) return (-1); | |
495 | memcpy(sa, ai->ai_addr, ai->ai_addrlen); | |
496 | freeaddrinfo(ai); | |
497 | return (0); | |
498 | } | |
499 | ||
1d1ccf4f | 500 | /*----- Access control lists ----------------------------------------------*/ |
e4976bb0 | 501 | |
502 | #ifdef DEBUG | |
503 | ||
1d1ccf4f | 504 | /* Write to standard error a description of the ACL node A. */ |
e4976bb0 | 505 | static void dump_aclnode(aclnode *a) |
506 | { | |
9314b85a MW |
507 | char buf[ADDRBUFSZ]; |
508 | const char *p; | |
509 | int plen; | |
e4976bb0 | 510 | |
e4976bb0 | 511 | fprintf(stderr, "noip: %c ", a->act ? '+' : '-'); |
9314b85a MW |
512 | plen = common_prefix_length(a->af, &a->minaddr, &a->maxaddr); |
513 | p = inet_ntop(a->af, &a->minaddr, buf, sizeof(buf)); | |
514 | fprintf(stderr, strchr(p, ':') ? "[%s]" : "%s", p); | |
515 | if (plen < 0) { | |
516 | p = inet_ntop(a->af, &a->maxaddr, buf, sizeof(buf)); | |
517 | fprintf(stderr, strchr(p, ':') ? "-[%s]" : "-%s", p); | |
518 | } else if (plen < address_width(a->af)) | |
519 | fprintf(stderr, "/%d", plen); | |
e4976bb0 | 520 | if (a->minport != 0 || a->maxport != 0xffff) { |
521 | fprintf(stderr, ":%u", (unsigned)a->minport); | |
522 | if (a->minport != a->maxport) | |
523 | fprintf(stderr, "-%u", (unsigned)a->maxport); | |
524 | } | |
525 | fputc('\n', stderr); | |
526 | } | |
527 | ||
1d1ccf4f MW |
528 | static void dump_acl(aclnode *a) |
529 | { | |
530 | int act = ALLOW; | |
531 | ||
532 | for (; a; a = a->next) { | |
533 | dump_aclnode(a); | |
534 | act = a->act; | |
535 | } | |
536 | fprintf(stderr, "noip: [default policy: %s]\n", | |
537 | act == ALLOW ? "DENY" : "ALLOW"); | |
538 | } | |
539 | ||
e4976bb0 | 540 | #endif |
541 | ||
9314b85a MW |
542 | /* Returns nonzero if the ACL A allows the socket address SA. */ |
543 | static int acl_allows_p(aclnode *a, const struct sockaddr *sa) | |
e4976bb0 | 544 | { |
9314b85a | 545 | unsigned short port = port_from_sockaddr(sa); |
e4976bb0 | 546 | int act = ALLOW; |
547 | ||
9314b85a MW |
548 | D({ char buf[ADDRBUFSZ]; |
549 | fprintf(stderr, "noip: check %s\n", | |
550 | present_sockaddr(sa, 0, buf, sizeof(buf))); }) | |
e4976bb0 | 551 | for (; a; a = a->next) { |
552 | D( dump_aclnode(a); ) | |
9314b85a | 553 | if (sockaddr_in_range_p(sa, &a->minaddr, &a->maxaddr) && |
e4976bb0 | 554 | a->minport <= port && port <= a->maxport) { |
555 | D( fprintf(stderr, "noip: aha! %s\n", a->act ? "ALLOW" : "DENY"); ) | |
556 | return (a->act); | |
557 | } | |
558 | act = a->act; | |
559 | } | |
560 | D( fprintf(stderr, "noip: nothing found: %s\n", act ? "DENY" : "ALLOW"); ) | |
561 | return (!act); | |
562 | } | |
563 | ||
1d1ccf4f | 564 | /*----- Socket address conversion -----------------------------------------*/ |
e4976bb0 | 565 | |
1d1ccf4f | 566 | /* Return a uniformly distributed integer between MIN and MAX inclusive. */ |
f6049fdd | 567 | static unsigned randrange(unsigned min, unsigned max) |
568 | { | |
569 | unsigned mask, i; | |
570 | ||
571 | /* It's so nice not to have to care about the quality of the generator | |
9314b85a MW |
572 | * much! |
573 | */ | |
f6049fdd | 574 | max -= min; |
575 | for (mask = 1; mask < max; mask = (mask << 1) | 1) | |
576 | ; | |
577 | do i = rand() & mask; while (i > max); | |
578 | return (i + min); | |
579 | } | |
580 | ||
1d1ccf4f MW |
581 | /* Return the status of Unix-domain socket address SUN. Returns: UNUSED if |
582 | * the socket doesn't exist; USED if the path refers to an active socket, or | |
583 | * isn't really a socket at all, or we can't tell without a careful search | |
584 | * and QUICKP is set; or STALE if the file refers to a socket which isn't | |
585 | * being used any more. | |
586 | */ | |
587 | static int unix_socket_status(struct sockaddr_un *sun, int quickp) | |
588 | { | |
589 | struct stat st; | |
590 | FILE *fp = 0; | |
591 | size_t len, n; | |
592 | int rc; | |
593 | char buf[256]; | |
594 | ||
595 | if (stat(sun->sun_path, &st)) | |
596 | return (errno == ENOENT ? UNUSED : USED); | |
597 | if (!S_ISSOCK(st.st_mode) || quickp) | |
598 | return (USED); | |
599 | rc = USED; | |
600 | if ((fp = fopen("/proc/net/unix", "r")) == 0) | |
601 | goto done; | |
72d85cdb | 602 | if (!fgets(buf, sizeof(buf), fp)) goto done; /* skip header */ |
1d1ccf4f MW |
603 | len = strlen(sun->sun_path); |
604 | while (fgets(buf, sizeof(buf), fp)) { | |
605 | n = strlen(buf); | |
606 | if (n >= len + 2 && buf[n - len - 2] == ' ' && buf[n - 1] == '\n' && | |
607 | memcmp(buf + n - len - 1, sun->sun_path, len) == 0) | |
608 | goto done; | |
609 | } | |
610 | if (ferror(fp)) | |
611 | goto done; | |
612 | rc = STALE; | |
613 | done: | |
614 | if (fp) fclose(fp); | |
615 | return (rc); | |
616 | } | |
617 | ||
9314b85a MW |
618 | /* Encode the Internet address SA as a Unix-domain address SUN. If WANT is |
619 | * WANT_FRESH, and SA's port number is zero, then we pick an arbitrary local | |
1d1ccf4f | 620 | * port. Otherwise we pick the port given. There's an unpleasant hack to |
9314b85a MW |
621 | * find servers bound to local wildcard addresses. Returns zero on success; |
622 | * -1 on failure. | |
1d1ccf4f | 623 | */ |
e4976bb0 | 624 | static int encode_inet_addr(struct sockaddr_un *sun, |
9314b85a | 625 | const struct sockaddr *sa, |
e4976bb0 | 626 | int want) |
627 | { | |
628 | int i; | |
3ef1fec9 | 629 | int desperatep = 0; |
9314b85a MW |
630 | address addr; |
631 | char buf[ADDRBUFSZ]; | |
e4976bb0 | 632 | int rc; |
633 | ||
9314b85a MW |
634 | D( fprintf(stderr, "noip: encode %s (%s)", |
635 | present_sockaddr(sa, 0, buf, sizeof(buf)), | |
e4976bb0 | 636 | want == WANT_EXISTING ? "EXISTING" : "FRESH"); ) |
637 | sun->sun_family = AF_UNIX; | |
9314b85a MW |
638 | if (port_from_sockaddr(sa) || want == WANT_EXISTING) { |
639 | snprintf(sun->sun_path, sizeof(sun->sun_path), "%s/%s", sockdir, | |
640 | present_sockaddr(sa, 0, buf, sizeof(buf))); | |
e4976bb0 | 641 | rc = unix_socket_status(sun, 0); |
642 | if (rc == STALE) unlink(sun->sun_path); | |
643 | if (rc != USED && want == WANT_EXISTING) { | |
9314b85a MW |
644 | wildcard_address(sa->sa_family, &addr.sa); |
645 | port_to_sockaddr(&addr.sa, port_from_sockaddr(sa)); | |
646 | snprintf(sun->sun_path, sizeof(sun->sun_path), "%s/%s", sockdir, | |
647 | present_sockaddr(&addr.sa, 0, buf, sizeof(buf))); | |
e4976bb0 | 648 | if (unix_socket_status(sun, 0) == STALE) unlink(sun->sun_path); |
649 | } | |
650 | } else { | |
9314b85a | 651 | copy_sockaddr(&addr.sa, sa); |
f6049fdd | 652 | for (i = 0; i < 10; i++) { |
9314b85a MW |
653 | port_to_sockaddr(&addr.sa, randrange(minautoport, maxautoport)); |
654 | snprintf(sun->sun_path, sizeof(sun->sun_path), "%s/%s", sockdir, | |
655 | present_sockaddr(&addr.sa, 0, buf, sizeof(buf))); | |
f6049fdd | 656 | if (unix_socket_status(sun, 1) == UNUSED) goto found; |
657 | } | |
3ef1fec9 | 658 | for (desperatep = 0; desperatep < 2; desperatep++) { |
f6049fdd | 659 | for (i = minautoport; i <= maxautoport; i++) { |
9314b85a MW |
660 | port_to_sockaddr(&addr.sa, i); |
661 | snprintf(sun->sun_path, sizeof(sun->sun_path), "%s/%s", sockdir, | |
662 | present_sockaddr(&addr.sa, 0, buf, sizeof(buf))); | |
3ef1fec9 | 663 | rc = unix_socket_status(sun, !desperatep); |
e4976bb0 | 664 | switch (rc) { |
665 | case STALE: unlink(sun->sun_path); | |
666 | case UNUSED: goto found; | |
667 | } | |
668 | } | |
669 | } | |
670 | errno = EADDRINUSE; | |
671 | D( fprintf(stderr, " -- can't resolve\n"); ) | |
672 | return (-1); | |
673 | found:; | |
674 | } | |
675 | D( fprintf(stderr, " -> `%s'\n", sun->sun_path); ) | |
676 | return (0); | |
677 | } | |
678 | ||
9314b85a MW |
679 | /* Decode the Unix address SUN to an Internet address SIN. If AF_HINT is |
680 | * nonzero, an empty address (indicative of an unbound Unix-domain socket) of | |
681 | * the is translated to a wildcard Internet address of the appropriate | |
682 | * family. Returns zero on success; -1 on failure (e.g., it wasn't one of | |
683 | * our addresses). | |
00a98a8a | 684 | */ |
9314b85a | 685 | static int decode_inet_addr(struct sockaddr *sa, int af_hint, |
e4976bb0 | 686 | const struct sockaddr_un *sun, |
9314b85a | 687 | socklen_t len) |
e4976bb0 | 688 | { |
9314b85a | 689 | char buf[ADDRBUFSZ]; |
a2114371 | 690 | size_t n = strlen(sockdir), nn; |
9314b85a | 691 | address addr; |
e4976bb0 | 692 | |
9314b85a MW |
693 | if (!sa) sa = &addr.sa; |
694 | if (sun->sun_family != AF_UNIX) return (-1); | |
695 | if (len > sizeof(*sun)) return (-1); | |
696 | ((char *)sun)[len] = 0; | |
a2114371 | 697 | nn = strlen(sun->sun_path); |
9314b85a MW |
698 | D( fprintf(stderr, "noip: decode `%s'", sun->sun_path); ) |
699 | if (af_hint && !sun->sun_path[0]) { | |
700 | wildcard_address(af_hint, sa); | |
e4976bb0 | 701 | D( fprintf(stderr, " -- unbound socket\n"); ) |
702 | return (0); | |
703 | } | |
704 | if (nn < n + 1 || nn - n >= sizeof(buf) || sun->sun_path[n] != '/' || | |
705 | memcmp(sun->sun_path, sockdir, n) != 0) { | |
706 | D( fprintf(stderr, " -- not one of ours\n"); ) | |
707 | return (-1); | |
708 | } | |
9314b85a MW |
709 | if (parse_sockaddr(sa, sun->sun_path + n + 1)) return (-1); |
710 | D( fprintf(stderr, " -> %s\n", | |
711 | present_sockaddr(sa, 0, buf, sizeof(buf))); ) | |
e4976bb0 | 712 | return (0); |
713 | } | |
714 | ||
1d1ccf4f MW |
715 | /* SK is (or at least might be) a Unix-domain socket we created when an |
716 | * Internet socket was asked for. We've decided it should be an Internet | |
9314b85a | 717 | * socket after all, with family AF_HINT, so convert it. |
1d1ccf4f | 718 | */ |
9314b85a | 719 | static int fixup_real_ip_socket(int sk, int af_hint) |
e4976bb0 | 720 | { |
721 | int nsk; | |
722 | int type; | |
723 | int f, fd; | |
724 | struct sockaddr_un sun; | |
9314b85a | 725 | address addr; |
e4976bb0 | 726 | socklen_t len; |
727 | ||
728 | #define OPTS(_) \ | |
729 | _(DEBUG, int) \ | |
730 | _(REUSEADDR, int) \ | |
731 | _(DONTROUTE, int) \ | |
732 | _(BROADCAST, int) \ | |
733 | _(SNDBUF, int) \ | |
734 | _(RCVBUF, int) \ | |
735 | _(OOBINLINE, int) \ | |
736 | _(NO_CHECK, int) \ | |
737 | _(LINGER, struct linger) \ | |
738 | _(BSDCOMPAT, int) \ | |
739 | _(RCVLOWAT, int) \ | |
740 | _(RCVTIMEO, struct timeval) \ | |
741 | _(SNDTIMEO, struct timeval) | |
742 | ||
743 | len = sizeof(sun); | |
744 | if (real_getsockname(sk, SA(&sun), &len)) | |
745 | return (-1); | |
9314b85a | 746 | if (decode_inet_addr(&addr.sa, af_hint, &sun, len)) |
e4976bb0 | 747 | return (0); /* Not one of ours */ |
748 | len = sizeof(type); | |
749 | if (real_getsockopt(sk, SOL_SOCKET, SO_TYPE, &type, &len) < 0 || | |
9314b85a | 750 | (nsk = real_socket(addr.sa.sa_family, type, 0)) < 0) |
e4976bb0 | 751 | return (-1); |
752 | #define FIX(opt, ty) do { \ | |
753 | ty ov_; \ | |
754 | len = sizeof(ov_); \ | |
755 | if (real_getsockopt(sk, SOL_SOCKET, SO_##opt, &ov_, &len) < 0 || \ | |
756 | real_setsockopt(nsk, SOL_SOCKET, SO_##opt, &ov_, len)) { \ | |
9fb8e5c9 | 757 | close(nsk); \ |
e4976bb0 | 758 | return (-1); \ |
759 | } \ | |
760 | } while (0); | |
761 | OPTS(FIX) | |
762 | #undef FIX | |
763 | if ((f = fcntl(sk, F_GETFL)) < 0 || | |
764 | (fd = fcntl(sk, F_GETFD)) < 0 || | |
765 | fcntl(nsk, F_SETFL, f) < 0 || | |
766 | dup2(nsk, sk) < 0) { | |
9fb8e5c9 | 767 | close(nsk); |
e4976bb0 | 768 | return (-1); |
769 | } | |
770 | unlink(sun.sun_path); | |
9fb8e5c9 | 771 | close(nsk); |
e4976bb0 | 772 | if (fcntl(sk, F_SETFD, fd) < 0) { |
773 | perror("noip: fixup_real_ip_socket F_SETFD"); | |
774 | abort(); | |
775 | } | |
776 | return (0); | |
777 | } | |
778 | ||
1d1ccf4f | 779 | /* The socket SK is about to be used to communicate with the remote address |
9314b85a MW |
780 | * SA. Assign it a local address so that getpeername(2) does something |
781 | * useful. | |
1d1ccf4f | 782 | */ |
e4976bb0 | 783 | static int do_implicit_bind(int sk, const struct sockaddr **sa, |
784 | socklen_t *len, struct sockaddr_un *sun) | |
785 | { | |
9314b85a | 786 | address addr; |
e4976bb0 | 787 | socklen_t mylen = sizeof(*sun); |
788 | ||
9314b85a MW |
789 | if (acl_allows_p(connect_real, *sa)) { |
790 | if (fixup_real_ip_socket(sk, (*sa)->sa_family)) return (-1); | |
e4976bb0 | 791 | } else { |
9314b85a | 792 | if (real_getsockname(sk, SA(sun), &mylen) < 0) return (-1); |
e4976bb0 | 793 | if (sun->sun_family == AF_UNIX) { |
794 | if (mylen < sizeof(*sun)) ((char *)sun)[mylen] = 0; | |
795 | if (!sun->sun_path[0]) { | |
9314b85a MW |
796 | wildcard_address((*sa)->sa_family, &addr.sa); |
797 | encode_inet_addr(sun, &addr.sa, WANT_FRESH); | |
798 | if (real_bind(sk, SA(sun), SUN_LEN(sun))) return (-1); | |
e4976bb0 | 799 | } |
9314b85a | 800 | encode_inet_addr(sun, *sa, WANT_EXISTING); |
e4976bb0 | 801 | *sa = SA(sun); |
802 | *len = SUN_LEN(sun); | |
803 | } | |
804 | } | |
805 | return (0); | |
806 | } | |
807 | ||
1d1ccf4f MW |
808 | /* We found the real address SA, with length LEN; if it's a Unix-domain |
809 | * address corresponding to a fake socket, convert it to cover up the | |
810 | * deception. Whatever happens, put the result at FAKE and store its length | |
811 | * at FAKELEN. | |
812 | */ | |
e4976bb0 | 813 | static void return_fake_name(struct sockaddr *sa, socklen_t len, |
814 | struct sockaddr *fake, socklen_t *fakelen) | |
815 | { | |
9314b85a | 816 | address addr; |
e4976bb0 | 817 | socklen_t alen; |
818 | ||
00a98a8a | 819 | if (sa->sa_family == AF_UNIX && |
9314b85a MW |
820 | !decode_inet_addr(&addr.sa, 0, SUN(sa), len)) { |
821 | sa = &addr.sa; | |
822 | len = family_socklen(addr.sa.sa_family); | |
e4976bb0 | 823 | } |
824 | alen = len; | |
9314b85a MW |
825 | if (len > *fakelen) len = *fakelen; |
826 | if (len > 0) memcpy(fake, sa, len); | |
e4976bb0 | 827 | *fakelen = alen; |
828 | } | |
829 | ||
1d1ccf4f | 830 | /*----- Configuration -----------------------------------------------------*/ |
e4976bb0 | 831 | |
1d1ccf4f | 832 | /* Return the process owner's home directory. */ |
e4976bb0 | 833 | static char *home(void) |
834 | { | |
835 | char *p; | |
836 | struct passwd *pw; | |
837 | ||
3ef1fec9 | 838 | if (getuid() == uid && |
839 | (p = getenv("HOME")) != 0) | |
840 | return (p); | |
841 | else if ((pw = getpwuid(uid)) != 0) | |
842 | return (pw->pw_dir); | |
843 | else | |
844 | return "/notexist"; | |
e4976bb0 | 845 | } |
846 | ||
1d1ccf4f | 847 | /* Return a good temporary directory to use. */ |
e4976bb0 | 848 | static char *tmpdir(void) |
849 | { | |
850 | char *p; | |
851 | ||
852 | if ((p = getenv("TMPDIR")) != 0) return (p); | |
853 | else if ((p = getenv("TMP")) != 0) return (p); | |
854 | else return ("/tmp"); | |
855 | } | |
856 | ||
1d1ccf4f | 857 | /* Return the user's name, or at least something distinctive. */ |
e4976bb0 | 858 | static char *user(void) |
859 | { | |
860 | static char buf[16]; | |
861 | char *p; | |
862 | struct passwd *pw; | |
863 | ||
864 | if ((p = getenv("USER")) != 0) return (p); | |
865 | else if ((p = getenv("LOGNAME")) != 0) return (p); | |
866 | else if ((pw = getpwuid(uid)) != 0) return (pw->pw_name); | |
867 | else { | |
868 | snprintf(buf, sizeof(buf), "uid-%lu", (unsigned long)uid); | |
869 | return (buf); | |
870 | } | |
871 | } | |
872 | ||
1d1ccf4f | 873 | /* Skip P over space characters. */ |
e4976bb0 | 874 | #define SKIPSPC do { while (*p && isspace(UC(*p))) p++; } while (0) |
1d1ccf4f MW |
875 | |
876 | /* Set Q to point to the next word following P, null-terminate it, and step P | |
877 | * past it. */ | |
e4976bb0 | 878 | #define NEXTWORD(q) do { \ |
879 | SKIPSPC; \ | |
880 | q = p; \ | |
881 | while (*p && !isspace(UC(*p))) p++; \ | |
882 | if (*p) *p++ = 0; \ | |
883 | } while (0) | |
1d1ccf4f MW |
884 | |
885 | /* Set Q to point to the next dotted-quad address, store the ending delimiter | |
886 | * in DEL, null-terminate it, and step P past it. */ | |
9314b85a MW |
887 | static void parse_nextaddr(char **pp, char **qq, int *del) |
888 | { | |
889 | char *p = *pp; | |
890 | ||
891 | SKIPSPC; | |
892 | if (*p == '[') { | |
893 | p++; SKIPSPC; | |
894 | *qq = p; | |
895 | p += strcspn(p, "]"); | |
896 | if (*p) *p++ = 0; | |
897 | *del = 0; | |
898 | } else { | |
899 | *qq = p; | |
900 | while (*p && (*p == '.' || isdigit(UC(*p)))) p++; | |
901 | *del = *p; | |
902 | if (*p) *p++ = 0; | |
903 | } | |
904 | *pp = p; | |
905 | } | |
1d1ccf4f MW |
906 | |
907 | /* Set Q to point to the next decimal number, store the ending delimiter in | |
908 | * DEL, null-terminate it, and step P past it. */ | |
e4976bb0 | 909 | #define NEXTNUMBER(q, del) do { \ |
910 | SKIPSPC; \ | |
911 | q = p; \ | |
912 | while (*p && isdigit(UC(*p))) p++; \ | |
913 | del = *p; \ | |
914 | if (*p) *p++ = 0; \ | |
915 | } while (0) | |
1d1ccf4f MW |
916 | |
917 | /* Push the character DEL back so we scan it again, unless it's zero | |
918 | * (end-of-file). */ | |
e4976bb0 | 919 | #define RESCAN(del) do { if (del) *--p = del; } while (0) |
1d1ccf4f MW |
920 | |
921 | /* Evaluate true if P is pointing to the word KW (and not some longer string | |
922 | * of which KW is a prefix). */ | |
923 | ||
e4976bb0 | 924 | #define KWMATCHP(kw) (strncmp(p, kw, sizeof(kw) - 1) == 0 && \ |
925 | !isalnum(UC(p[sizeof(kw) - 1])) && \ | |
926 | (p += sizeof(kw) - 1)) | |
9f82ba1f | 927 | |
1d1ccf4f MW |
928 | /* Parse a port list, starting at *PP. Port lists have the form |
929 | * [:LOW[-HIGH]]: if omitted, all ports are included; if HIGH is omitted, | |
930 | * it's as if HIGH = LOW. Store LOW in *MIN, HIGH in *MAX and set *PP to the | |
931 | * rest of the string. | |
932 | */ | |
e4976bb0 | 933 | static void parse_ports(char **pp, unsigned short *min, unsigned short *max) |
934 | { | |
935 | char *p = *pp, *q; | |
936 | int del; | |
937 | ||
938 | SKIPSPC; | |
f6049fdd | 939 | if (*p != ':') |
940 | { *min = 0; *max = 0xffff; } | |
941 | else { | |
e4976bb0 | 942 | p++; |
f6049fdd | 943 | NEXTNUMBER(q, del); *min = strtoul(q, 0, 0); RESCAN(del); |
e4976bb0 | 944 | SKIPSPC; |
f6049fdd | 945 | if (*p == '-') |
d83beb5c | 946 | { p++; NEXTNUMBER(q, del); *max = strtoul(q, 0, 0); RESCAN(del); } |
f6049fdd | 947 | else |
e4976bb0 | 948 | *max = *min; |
949 | } | |
950 | *pp = p; | |
951 | } | |
952 | ||
9314b85a MW |
953 | /* Make a new ACL node. ACT is the verdict; AF is the address family; |
954 | * MINADDR and MAXADDR are the ranges on IP addresses; MINPORT and MAXPORT | |
955 | * are the ranges on port numbers; TAIL is the list tail to attach the new | |
956 | * node to. | |
1d1ccf4f | 957 | */ |
e4976bb0 | 958 | #define ACLNODE(tail_, act_, \ |
9314b85a | 959 | af_, minaddr_, maxaddr_, minport_, maxport_) do { \ |
e4976bb0 | 960 | aclnode *a_; \ |
961 | NEW(a_); \ | |
9314b85a MW |
962 | a_->act = (act_); \ |
963 | a_->af = (af_); \ | |
964 | a_->minaddr = (minaddr_); a_->maxaddr = (maxaddr_); \ | |
965 | a_->minport = (minport_); a_->maxport = (maxport_); \ | |
e4976bb0 | 966 | *tail_ = a_; tail_ = &a_->next; \ |
967 | } while (0) | |
968 | ||
1d1ccf4f MW |
969 | /* Parse an ACL line. *PP points to the end of the line; *TAIL points to |
970 | * the list tail (i.e., the final link in the list). An ACL entry has the | |
971 | * form +|- [any | local | ADDR | ADDR - ADDR | ADDR/ADDR | ADDR/INT] PORTS | |
972 | * where PORTS is parsed by parse_ports above; an ACL line consists of a | |
973 | * comma-separated sequence of entries.. | |
974 | */ | |
e4976bb0 | 975 | static void parse_acl_line(char **pp, aclnode ***tail) |
976 | { | |
9314b85a | 977 | ipaddr minaddr, maxaddr; |
e4976bb0 | 978 | unsigned short minport, maxport; |
9314b85a | 979 | int i, af, n; |
e4976bb0 | 980 | int act; |
981 | int del; | |
982 | char *p = *pp; | |
983 | char *q; | |
984 | ||
a6d9626b | 985 | for (;;) { |
986 | SKIPSPC; | |
987 | if (*p == '+') act = ALLOW; | |
988 | else if (*p == '-') act = DENY; | |
989 | else goto bad; | |
e4976bb0 | 990 | |
a6d9626b | 991 | p++; |
992 | SKIPSPC; | |
993 | if (KWMATCHP("any")) { | |
9314b85a MW |
994 | parse_ports(&p, &minport, &maxport); |
995 | for (i = 0; address_families[i] >= 0; i++) { | |
996 | af = address_families[i]; | |
997 | memset(&minaddr, 0, sizeof(minaddr)); | |
998 | maxaddr = minaddr; mask_address(af, &maxaddr, 0, 1); | |
999 | ACLNODE(*tail, act, af, minaddr, maxaddr, minport, maxport); | |
1000 | } | |
a6d9626b | 1001 | } else if (KWMATCHP("local")) { |
1002 | parse_ports(&p, &minport, &maxport); | |
9314b85a MW |
1003 | for (i = 0; address_families[i] >= 0; i++) { |
1004 | af = address_families[i]; | |
1005 | memset(&minaddr, 0, sizeof(minaddr)); | |
1006 | maxaddr = minaddr; mask_address(af, &maxaddr, 0, 1); | |
1007 | ACLNODE(*tail, act, af, minaddr, minaddr, minport, maxport); | |
1008 | ACLNODE(*tail, act, af, maxaddr, maxaddr, minport, maxport); | |
1009 | } | |
a6d9626b | 1010 | for (i = 0; i < n_local_ipaddrs; i++) { |
9314b85a MW |
1011 | ACLNODE(*tail, act, local_ipaddrs[i].af, |
1012 | local_ipaddrs[i].addr, local_ipaddrs[i].addr, | |
1013 | minport, maxport); | |
a6d9626b | 1014 | } |
e4976bb0 | 1015 | } else { |
9314b85a MW |
1016 | parse_nextaddr(&p, &q, &del); |
1017 | af = guess_address_family(q); | |
1018 | if (inet_pton(af, q, &minaddr) <= 0) goto bad; | |
1019 | RESCAN(del); | |
1020 | SKIPSPC; | |
1021 | if (*p == '-') { | |
1022 | p++; | |
1023 | parse_nextaddr(&p, &q, &del); | |
1024 | if (inet_pton(af, q, &maxaddr) <= 0) goto bad; | |
e4976bb0 | 1025 | RESCAN(del); |
9314b85a MW |
1026 | } else if (*p == '/') { |
1027 | p++; | |
1028 | NEXTNUMBER(q, del); | |
1029 | n = strtoul(q, 0, 0); | |
1030 | maxaddr = minaddr; | |
1031 | mask_address(af, &minaddr, n, 0); | |
1032 | mask_address(af, &maxaddr, n, 1); | |
1033 | } else | |
1034 | maxaddr = minaddr; | |
a6d9626b | 1035 | parse_ports(&p, &minport, &maxport); |
9314b85a | 1036 | ACLNODE(*tail, act, af, minaddr, maxaddr, minport, maxport); |
e4976bb0 | 1037 | } |
a6d9626b | 1038 | SKIPSPC; |
1039 | if (*p != ',') break; | |
1040 | p++; | |
e4976bb0 | 1041 | } |
1042 | return; | |
1043 | ||
1044 | bad: | |
1045 | D( fprintf(stderr, "noip: bad acl spec (ignored)\n"); ) | |
1046 | return; | |
1047 | } | |
1048 | ||
1d1ccf4f | 1049 | /* Parse the autoports configuration directive. Syntax is MIN - MAX. */ |
f6049fdd | 1050 | static void parse_autoports(char **pp) |
1051 | { | |
1052 | char *p = *pp, *q; | |
1053 | unsigned x, y; | |
1054 | int del; | |
1055 | ||
1056 | SKIPSPC; | |
1057 | NEXTNUMBER(q, del); x = strtoul(q, 0, 0); RESCAN(del); | |
1058 | SKIPSPC; | |
1059 | if (*p != '-') goto bad; p++; | |
1060 | NEXTNUMBER(q, del); y = strtoul(q, 0, 0); RESCAN(del); | |
1061 | minautoport = x; maxautoport = y; | |
1062 | return; | |
1063 | ||
1064 | bad: | |
1065 | D( fprintf(stderr, "bad port range (ignored)\n"); ) | |
1066 | return; | |
1067 | } | |
1068 | ||
1d1ccf4f MW |
1069 | /* Parse an ACL from an environment variable VAR, attaching it to the list |
1070 | * TAIL. */ | |
a6d9626b | 1071 | static void parse_acl_env(const char *var, aclnode ***tail) |
1072 | { | |
f6049fdd | 1073 | char *p, *q; |
a6d9626b | 1074 | |
1075 | if ((p = getenv(var)) != 0) { | |
f6049fdd | 1076 | p = q = xstrdup(p); |
1077 | parse_acl_line(&q, tail); | |
a6d9626b | 1078 | free(p); |
1079 | } | |
1080 | } | |
1081 | ||
1d1ccf4f | 1082 | /* Read the configuration from the config file and environment. */ |
e4976bb0 | 1083 | static void readconfig(void) |
1084 | { | |
1085 | FILE *fp; | |
1086 | char buf[1024]; | |
1087 | size_t n; | |
f6049fdd | 1088 | char *p, *q, *cmd; |
e4976bb0 | 1089 | |
a6d9626b | 1090 | parse_acl_env("NOIP_REALBIND_BEFORE", &bind_tail); |
1091 | parse_acl_env("NOIP_REALCONNECT_BEFORE", &connect_tail); | |
f6049fdd | 1092 | if ((p = getenv("NOIP_AUTOPORTS")) != 0) { |
1093 | p = q = xstrdup(p); | |
1094 | parse_autoports(&q); | |
1095 | free(p); | |
1096 | } | |
4ab301de | 1097 | if ((p = getenv("NOIP_CONFIG")) == 0) |
1098 | snprintf(p = buf, sizeof(buf), "%s/.noip", home()); | |
1099 | D( fprintf(stderr, "noip: config file: %s\n", p); ) | |
1100 | ||
1101 | if ((fp = fopen(p, "r")) == 0) { | |
1102 | D( fprintf(stderr, "noip: couldn't read config: %s\n", | |
1103 | strerror(errno)); ) | |
f6049fdd | 1104 | goto done; |
4ab301de | 1105 | } |
e4976bb0 | 1106 | while (fgets(buf, sizeof(buf), fp)) { |
1107 | n = strlen(buf); | |
1108 | p = buf; | |
1109 | ||
1110 | SKIPSPC; | |
1111 | if (!*p || *p == '#') continue; | |
1112 | while (n && isspace(UC(buf[n - 1]))) n--; | |
1113 | buf[n] = 0; | |
1114 | NEXTWORD(cmd); | |
1115 | SKIPSPC; | |
1116 | ||
1117 | if (strcmp(cmd, "socketdir") == 0) | |
1118 | sockdir = xstrdup(p); | |
1119 | else if (strcmp(cmd, "realbind") == 0) | |
1120 | parse_acl_line(&p, &bind_tail); | |
1121 | else if (strcmp(cmd, "realconnect") == 0) | |
1122 | parse_acl_line(&p, &connect_tail); | |
f6049fdd | 1123 | else if (strcmp(cmd, "autoports") == 0) |
1124 | parse_autoports(&p); | |
e4976bb0 | 1125 | else if (strcmp(cmd, "debug") == 0) |
1126 | debug = *p ? atoi(p) : 1; | |
1127 | else | |
1128 | D( fprintf(stderr, "noip: bad config command %s\n", cmd); ) | |
1129 | } | |
1130 | fclose(fp); | |
1131 | ||
1132 | done: | |
a6d9626b | 1133 | parse_acl_env("NOIP_REALBIND", &bind_tail); |
1134 | parse_acl_env("NOIP_REALCONNECT", &connect_tail); | |
1135 | parse_acl_env("NOIP_REALBIND_AFTER", &bind_tail); | |
1136 | parse_acl_env("NOIP_REALCONNECT_AFTER", &connect_tail); | |
e4976bb0 | 1137 | *bind_tail = 0; |
1138 | *connect_tail = 0; | |
a6d9626b | 1139 | if (!sockdir) sockdir = getenv("NOIP_SOCKETDIR"); |
e4976bb0 | 1140 | if (!sockdir) { |
1141 | snprintf(buf, sizeof(buf), "%s/noip-%s", tmpdir(), user()); | |
1142 | sockdir = xstrdup(buf); | |
1143 | } | |
3ef1fec9 | 1144 | D( fprintf(stderr, "noip: socketdir: %s\n", sockdir); |
f6049fdd | 1145 | fprintf(stderr, "noip: autoports: %u-%u\n", |
1146 | minautoport, maxautoport); | |
e4976bb0 | 1147 | fprintf(stderr, "noip: realbind acl:\n"); |
1148 | dump_acl(bind_real); | |
1149 | fprintf(stderr, "noip: realconnect acl:\n"); | |
1150 | dump_acl(connect_real); ) | |
1151 | } | |
1152 | ||
1d1ccf4f | 1153 | /*----- Overridden system calls -------------------------------------------*/ |
e4976bb0 | 1154 | |
1155 | int socket(int pf, int ty, int proto) | |
1156 | { | |
8ce11853 | 1157 | switch (pf) { |
9314b85a MW |
1158 | default: |
1159 | if (!family_known_p(pf)) { | |
1160 | errno = EAFNOSUPPORT; | |
1161 | return (-1); | |
1162 | } | |
8ce11853 MW |
1163 | pf = PF_UNIX; |
1164 | proto = 0; | |
1165 | case PF_UNIX: | |
41c50995 MW |
1166 | #ifdef PF_NETLINK |
1167 | case PF_NETLINK: | |
1168 | #endif | |
9314b85a | 1169 | return (real_socket(pf, ty, proto)); |
e4976bb0 | 1170 | } |
e4976bb0 | 1171 | } |
1172 | ||
1173 | int socketpair(int pf, int ty, int proto, int *sk) | |
1174 | { | |
1175 | if (pf == PF_INET) { | |
1176 | pf = PF_UNIX; | |
1177 | proto = 0; | |
1178 | } | |
1179 | return (real_socketpair(pf, ty, proto, sk)); | |
1180 | } | |
1181 | ||
1182 | int bind(int sk, const struct sockaddr *sa, socklen_t len) | |
1183 | { | |
1184 | struct sockaddr_un sun; | |
1185 | ||
9314b85a | 1186 | if (family_known_p(sa->sa_family)) { |
e4976bb0 | 1187 | PRESERVING_ERRNO({ |
9314b85a MW |
1188 | if (acl_allows_p(bind_real, sa)) { |
1189 | if (fixup_real_ip_socket(sk, sa->sa_family)) | |
e4976bb0 | 1190 | return (-1); |
1191 | } else { | |
9314b85a | 1192 | encode_inet_addr(&sun, sa, WANT_FRESH); |
e4976bb0 | 1193 | sa = SA(&sun); |
1194 | len = SUN_LEN(&sun); | |
1195 | } | |
1196 | }); | |
1197 | } | |
9314b85a | 1198 | return (real_bind(sk, sa, len)); |
e4976bb0 | 1199 | } |
1200 | ||
1201 | int connect(int sk, const struct sockaddr *sa, socklen_t len) | |
1202 | { | |
1203 | struct sockaddr_un sun; | |
53390eff | 1204 | int rc; |
e4976bb0 | 1205 | |
9314b85a MW |
1206 | if (!family_known_p(sa->sa_family)) |
1207 | rc = real_connect(sk, sa, len); | |
1208 | else { | |
1209 | PRESERVING_ERRNO({ | |
1210 | do_implicit_bind(sk, &sa, &len, &sun); | |
1211 | }); | |
1212 | rc = real_connect(sk, sa, len); | |
1213 | if (rc < 0) { | |
1214 | switch (errno) { | |
1215 | case ENOENT: errno = ECONNREFUSED; break; | |
6df6f816 | 1216 | } |
9314b85a | 1217 | } |
53390eff | 1218 | } |
9314b85a | 1219 | return (rc); |
e4976bb0 | 1220 | } |
1221 | ||
1222 | ssize_t sendto(int sk, const void *buf, size_t len, int flags, | |
1223 | const struct sockaddr *to, socklen_t tolen) | |
1224 | { | |
1225 | struct sockaddr_un sun; | |
1226 | ||
1227 | if (to && to->sa_family == AF_INET) { | |
1228 | PRESERVING_ERRNO({ | |
1229 | do_implicit_bind(sk, &to, &tolen, &sun); | |
1230 | }); | |
1231 | } | |
9314b85a | 1232 | return (real_sendto(sk, buf, len, flags, to, tolen)); |
e4976bb0 | 1233 | } |
1234 | ||
1235 | ssize_t recvfrom(int sk, void *buf, size_t len, int flags, | |
1236 | struct sockaddr *from, socklen_t *fromlen) | |
1237 | { | |
1238 | char sabuf[1024]; | |
1239 | socklen_t mylen = sizeof(sabuf); | |
1240 | ssize_t n; | |
1241 | ||
1242 | if (!from) | |
1243 | return real_recvfrom(sk, buf, len, flags, 0, 0); | |
1244 | PRESERVING_ERRNO({ | |
1245 | n = real_recvfrom(sk, buf, len, flags, SA(sabuf), &mylen); | |
1246 | if (n < 0) | |
1247 | return (-1); | |
1248 | return_fake_name(SA(sabuf), mylen, from, fromlen); | |
1249 | }); | |
1250 | return (n); | |
1251 | } | |
1252 | ||
1253 | ssize_t sendmsg(int sk, const struct msghdr *msg, int flags) | |
1254 | { | |
1255 | struct sockaddr_un sun; | |
1256 | const struct sockaddr *sa; | |
1257 | struct msghdr mymsg; | |
1258 | ||
1259 | if (msg->msg_name && SA(msg->msg_name)->sa_family == AF_INET) { | |
1260 | PRESERVING_ERRNO({ | |
1261 | sa = SA(msg->msg_name); | |
1262 | mymsg = *msg; | |
1263 | do_implicit_bind(sk, &sa, &mymsg.msg_namelen, &sun); | |
1264 | mymsg.msg_name = SA(sa); | |
1265 | msg = &mymsg; | |
1266 | }); | |
1267 | } | |
9314b85a | 1268 | return (real_sendmsg(sk, msg, flags)); |
e4976bb0 | 1269 | } |
1270 | ||
1271 | ssize_t recvmsg(int sk, struct msghdr *msg, int flags) | |
1272 | { | |
1273 | char sabuf[1024]; | |
1274 | struct sockaddr *sa; | |
1275 | socklen_t len; | |
1276 | ssize_t n; | |
1277 | ||
1278 | if (!msg->msg_name) | |
9314b85a | 1279 | return (real_recvmsg(sk, msg, flags)); |
e4976bb0 | 1280 | PRESERVING_ERRNO({ |
1281 | sa = SA(msg->msg_name); | |
1282 | len = msg->msg_namelen; | |
1283 | msg->msg_name = sabuf; | |
1284 | msg->msg_namelen = sizeof(sabuf); | |
1285 | n = real_recvmsg(sk, msg, flags); | |
1286 | if (n < 0) | |
1287 | return (-1); | |
1288 | return_fake_name(SA(sabuf), msg->msg_namelen, sa, &len); | |
1289 | msg->msg_name = sa; | |
1290 | msg->msg_namelen = len; | |
1291 | }); | |
1292 | return (n); | |
1293 | } | |
1294 | ||
1295 | int accept(int sk, struct sockaddr *sa, socklen_t *len) | |
1296 | { | |
1297 | char sabuf[1024]; | |
1298 | socklen_t mylen = sizeof(sabuf); | |
1299 | int nsk = real_accept(sk, SA(sabuf), &mylen); | |
1300 | ||
1301 | if (nsk < 0) | |
1302 | return (-1); | |
1303 | return_fake_name(SA(sabuf), mylen, sa, len); | |
1304 | return (nsk); | |
1305 | } | |
1306 | ||
1307 | int getsockname(int sk, struct sockaddr *sa, socklen_t *len) | |
1308 | { | |
1309 | PRESERVING_ERRNO({ | |
1310 | char sabuf[1024]; | |
1311 | socklen_t mylen = sizeof(sabuf); | |
1312 | if (real_getsockname(sk, SA(sabuf), &mylen)) | |
1313 | return (-1); | |
1314 | return_fake_name(SA(sabuf), mylen, sa, len); | |
1315 | }); | |
1316 | return (0); | |
1317 | } | |
1318 | ||
1319 | int getpeername(int sk, struct sockaddr *sa, socklen_t *len) | |
1320 | { | |
1321 | PRESERVING_ERRNO({ | |
1322 | char sabuf[1024]; | |
1323 | socklen_t mylen = sizeof(sabuf); | |
1324 | if (real_getpeername(sk, SA(sabuf), &mylen)) | |
1325 | return (-1); | |
1326 | return_fake_name(SA(sabuf), mylen, sa, len); | |
1327 | }); | |
1328 | return (0); | |
1329 | } | |
1330 | ||
1331 | int getsockopt(int sk, int lev, int opt, void *p, socklen_t *len) | |
1332 | { | |
1333 | switch (lev) { | |
1334 | case SOL_IP: | |
1335 | case SOL_TCP: | |
1336 | case SOL_UDP: | |
1337 | if (*len > 0) | |
1338 | memset(p, 0, *len); | |
1339 | return (0); | |
1340 | } | |
9314b85a | 1341 | return (real_getsockopt(sk, lev, opt, p, len)); |
e4976bb0 | 1342 | } |
1343 | ||
1344 | int setsockopt(int sk, int lev, int opt, const void *p, socklen_t len) | |
1345 | { | |
1346 | switch (lev) { | |
1347 | case SOL_IP: | |
1348 | case SOL_TCP: | |
1349 | case SOL_UDP: | |
1350 | return (0); | |
1351 | } | |
1352 | switch (opt) { | |
1353 | case SO_BINDTODEVICE: | |
1354 | case SO_ATTACH_FILTER: | |
1355 | case SO_DETACH_FILTER: | |
1356 | return (0); | |
1357 | } | |
9314b85a | 1358 | return (real_setsockopt(sk, lev, opt, p, len)); |
e4976bb0 | 1359 | } |
1360 | ||
1d1ccf4f | 1361 | /*----- Initialization ----------------------------------------------------*/ |
e4976bb0 | 1362 | |
1d1ccf4f | 1363 | /* Clean up the socket directory, deleting stale sockets. */ |
e4976bb0 | 1364 | static void cleanup_sockdir(void) |
1365 | { | |
1366 | DIR *dir; | |
1367 | struct dirent *d; | |
9314b85a | 1368 | address addr; |
e4976bb0 | 1369 | struct sockaddr_un sun; |
3ef1fec9 | 1370 | struct stat st; |
e4976bb0 | 1371 | |
9314b85a | 1372 | if ((dir = opendir(sockdir)) == 0) return; |
4ab301de | 1373 | sun.sun_family = AF_UNIX; |
e4976bb0 | 1374 | while ((d = readdir(dir)) != 0) { |
1375 | if (d->d_name[0] == '.') continue; | |
1376 | snprintf(sun.sun_path, sizeof(sun.sun_path), | |
1377 | "%s/%s", sockdir, d->d_name); | |
9314b85a | 1378 | if (decode_inet_addr(&addr.sa, 0, &sun, SUN_LEN(&sun)) || |
3ef1fec9 | 1379 | stat(sun.sun_path, &st) || |
4ab301de | 1380 | !S_ISSOCK(st.st_mode)) { |
1381 | D( fprintf(stderr, "noip: ignoring unknown socketdir entry `%s'\n", | |
1382 | sun.sun_path); ) | |
3ef1fec9 | 1383 | continue; |
4ab301de | 1384 | } |
e4976bb0 | 1385 | if (unix_socket_status(&sun, 0) == STALE) { |
1386 | D( fprintf(stderr, "noip: clearing away stale socket %s\n", | |
1387 | d->d_name); ) | |
1388 | unlink(sun.sun_path); | |
1389 | } | |
1390 | } | |
1391 | closedir(dir); | |
1392 | } | |
1393 | ||
1d1ccf4f MW |
1394 | /* Find the addresses attached to local network interfaces, and remember them |
1395 | * in a table. | |
1396 | */ | |
e4976bb0 | 1397 | static void get_local_ipaddrs(void) |
1398 | { | |
9f1396d9 | 1399 | struct ifaddrs *ifa_head, *ifa; |
9314b85a | 1400 | ipaddr a; |
e4976bb0 | 1401 | int i; |
1402 | ||
9f1396d9 MW |
1403 | if (getifaddrs(&ifa_head)) { perror("getifaddrs"); return; } |
1404 | for (n_local_ipaddrs = 0, ifa = ifa_head; | |
1405 | n_local_ipaddrs < MAX_LOCAL_IPADDRS && ifa; | |
1406 | ifa = ifa->ifa_next) { | |
9314b85a | 1407 | if (!ifa->ifa_addr || !family_known_p(ifa->ifa_addr->sa_family)) |
e4976bb0 | 1408 | continue; |
9314b85a MW |
1409 | ipaddr_from_sockaddr(&a, ifa->ifa_addr); |
1410 | D({ char buf[ADDRBUFSZ]; | |
1411 | fprintf(stderr, "noip: local addr %s = %s", ifa->ifa_name, | |
1412 | inet_ntop(ifa->ifa_addr->sa_family, &a, | |
1413 | buf, sizeof(buf))); }) | |
9f1396d9 | 1414 | for (i = 0; i < n_local_ipaddrs; i++) { |
9314b85a MW |
1415 | if (ifa->ifa_addr->sa_family == local_ipaddrs[i].af && |
1416 | ipaddr_equal_p(local_ipaddrs[i].af, &a, &local_ipaddrs[i].addr)) { | |
9f1396d9 MW |
1417 | D( fprintf(stderr, " (duplicate)\n"); ) |
1418 | goto skip; | |
1419 | } | |
1420 | } | |
1421 | D( fprintf(stderr, "\n"); ) | |
9314b85a MW |
1422 | local_ipaddrs[n_local_ipaddrs].af = ifa->ifa_addr->sa_family; |
1423 | local_ipaddrs[n_local_ipaddrs].addr = a; | |
9f1396d9 MW |
1424 | n_local_ipaddrs++; |
1425 | skip:; | |
e4976bb0 | 1426 | } |
9f1396d9 | 1427 | freeifaddrs(ifa_head); |
e4976bb0 | 1428 | } |
1429 | ||
1d1ccf4f | 1430 | /* Print the given message to standard error. Avoids stdio. */ |
72d85cdb | 1431 | static void printerr(const char *p) |
65f3786c | 1432 | { if (write(STDERR_FILENO, p, strlen(p))) ; } |
3ef1fec9 | 1433 | |
1d1ccf4f | 1434 | /* Create the socket directory, being careful about permissions. */ |
3ef1fec9 | 1435 | static void create_sockdir(void) |
1436 | { | |
1437 | struct stat st; | |
1438 | ||
1439 | if (stat(sockdir, &st)) { | |
1440 | if (errno == ENOENT) { | |
1441 | if (mkdir(sockdir, 0700)) { | |
1442 | perror("noip: creating socketdir"); | |
1443 | exit(127); | |
1444 | } | |
1445 | if (!stat(sockdir, &st)) | |
1446 | goto check; | |
1447 | } | |
1448 | perror("noip: checking socketdir"); | |
1449 | exit(127); | |
1450 | } | |
1451 | check: | |
1452 | if (!S_ISDIR(st.st_mode)) { | |
1453 | printerr("noip: bad socketdir: not a directory\n"); | |
1454 | exit(127); | |
1455 | } | |
1456 | if (st.st_uid != uid) { | |
1457 | printerr("noip: bad socketdir: not owner\n"); | |
1458 | exit(127); | |
1459 | } | |
1460 | if (st.st_mode & 077) { | |
1461 | printerr("noip: bad socketdir: not private\n"); | |
1462 | exit(127); | |
1463 | } | |
1464 | } | |
1465 | ||
1d1ccf4f MW |
1466 | /* Initialization function. */ |
1467 | static void setup(void) __attribute__((constructor)); | |
e4976bb0 | 1468 | static void setup(void) |
1469 | { | |
1470 | PRESERVING_ERRNO({ | |
1471 | char *p; | |
1472 | ||
1473 | import(); | |
3ef1fec9 | 1474 | uid = geteuid(); |
e4976bb0 | 1475 | if ((p = getenv("NOIP_DEBUG")) && atoi(p)) |
1476 | debug = 1; | |
1477 | get_local_ipaddrs(); | |
1478 | readconfig(); | |
3ef1fec9 | 1479 | create_sockdir(); |
e4976bb0 | 1480 | cleanup_sockdir(); |
1481 | }); | |
1482 | } | |
1d1ccf4f MW |
1483 | |
1484 | /*----- That's all, folks -------------------------------------------------*/ |