/[cvs]/eggdrop1.9/src/net.c
ViewVC logotype

Contents of /eggdrop1.9/src/net.c

Parent Directory Parent Directory | Revision Log Revision Log | View Revision Graph Revision Graph


Revision 1.66 - (show annotations) (download) (as text)
Thu Jan 30 07:47:17 2003 UTC (16 years, 8 months ago) by wcc
Branch: MAIN
Changes since 1.65: +6 -5 lines
File MIME type: text/x-chdr
* Fixed a few compiler errors/warnings (found by Eule).

1 /*
2 * net.c --
3 *
4 * all raw network i/o
5 */
6 /*
7 * This [code] is hereby released into the public domain.
8 * Robey Pointer, robey@netcom.com
9 */
10
11 #ifndef lint
12 static const char rcsid[] = "$Id: net.c,v 1.65 2002/10/11 00:49:20 wcc Exp $";
13 #endif
14
15 #include <fcntl.h>
16 #include "main.h"
17 #include <limits.h>
18 #include <string.h>
19 #include <netdb.h>
20 #include <sys/socket.h>
21 #if HAVE_SYS_SELECT_H
22 # include <sys/select.h>
23 #endif
24 #include <netinet/in.h>
25 #include <arpa/inet.h>
26 #include <errno.h>
27 #if HAVE_UNISTD_H
28 # include <unistd.h>
29 #endif
30 #include <setjmp.h>
31
32 #include "lib/adns/adns.h"
33 #include "logfile.h"
34 #include "dns.h"
35 #include "dccutil.h" /* dprintf_eggdrop */
36 #include "tcl.h" /* findanyidx */
37 #include "net.h" /* prototypes */
38
39 #include "traffic.h" /* egg_traffic_t */
40
41 #if !HAVE_GETDTABLESIZE
42 # ifdef FD_SETSIZE
43 # define getdtablesize() FD_SETSIZE
44 # else
45 # define getdtablesize() 200
46 # endif
47 #endif
48
49 #ifndef IN6_IS_ADDR_V4MAPPED
50 # define IN6_IS_ADDR_V4MAPPED(a) \
51 ((((uint32_t *) (a))[0] == 0) && (((uint32_t *) (a))[1] == 0) && \
52 (((uint32_t *) (a))[2] == htonl (0xffff)))
53 #endif
54
55 extern struct dcc_t *dcc;
56 extern int backgrd, use_stderr, resolve_timeout, dcc_total;
57
58 extern char natip[];
59
60 char myip[121] = ""; /* IP can be specified in the config file */
61 char myip6[121] = ""; /* IP6 can be specified in the config file */
62 char firewall[121] = ""; /* Socks server for firewall */
63 int firewallport = 1080; /* Default port of Sock4/5 firewalls */
64 char botuser[21] = "eggdrop"; /* Username of the user running the bot */
65 sock_list *socklist = NULL; /* Enough to be safe */
66 int MAXSOCKS = 0;
67 jmp_buf alarmret; /* Env buffer for alarm() returns */
68 IP localipv4addr = 0; /* Cache the local IPv4 address */
69
70 adns_state ads;
71
72 /* Types of proxy */
73 #define PROXY_SOCKS 1
74 #define PROXY_SUN 2
75
76 /* Initialize the socklist
77 */
78 void init_net()
79 {
80 int i;
81 char s[256];
82 struct hostent *hp;
83
84 socklist = (sock_list *)calloc(MAXSOCKS, sizeof(sock_list));
85 for (i = 0; i < MAXSOCKS; i++) {
86 socklist[i].flags = SOCK_UNUSED;
87 }
88
89 gethostname(s, sizeof s);
90 if ((hp = gethostbyname(s)) == NULL)
91 fatal("Hostname self-lookup failed. Please set 'my-ip' in the config "
92 "file.", 0);
93 localipv4addr = *((IP*) (hp->h_addr_list[0]));
94
95 /* init ADNS */
96 i = adns_init(&ads, adns_if_noautosys, 0);
97 if (i)
98 fatal(adns_strerror(i), 0);
99 }
100
101 /* Get my ip number
102 */
103 IP getmyip()
104 {
105 /* Could be pre-defined */
106 if (myip[0] && (myip[strlen(myip) - 1] >= '0') &&
107 (myip[strlen(myip) - 1] <= '9')) {
108 return (IP) inet_addr(myip);
109 }
110 return localipv4addr;
111 }
112
113 #ifdef IPV6
114 struct in6_addr getmyip6()
115 {
116 struct in6_addr ip;
117
118 /* Could be pre-defined */
119 if (myip6[0])
120 inet_pton(AF_INET6, myip6, &ip);
121 else {
122 /* get system's default IPv6 ip -- FIXME!? */
123 /* is there a know way?! - drummer */
124 ip = in6addr_any;
125 }
126 return ip;
127 }
128
129 struct in6_addr ipv4to6(IP a)
130 {
131 struct in6_addr ip;
132 if (a == INADDR_ANY)
133 return in6addr_any;
134 else {
135 ((uint32_t *)&ip)[0] = 0;
136 ((uint32_t *)&ip)[1] = 0;
137 ((uint16_t *)&ip)[4] = 0;
138 ((uint16_t *)&ip)[5] = 0xffff;
139 ((uint32_t *)&ip)[3] = a;
140 }
141 return ip;
142 }
143
144 #endif
145
146 void neterror(char *s)
147 {
148 int e = errno;
149 char *err = strerror(e);
150
151 /* Calling procs usually use char s[UHOSTLEN] for the error message. */
152 if (err) strlcpy(s, err, UHOSTLEN);
153 else sprintf(s, "Unforeseen error %d", e);
154 }
155
156 /* Sets/Unsets options for a specific socket.
157 *
158 * Returns: 0 - on success
159 * -1 - socket not found
160 * -2 - illegal operation
161 */
162 int sockoptions(int sock, int operation, int sock_options)
163 {
164 int i;
165
166 for (i = 0; i < MAXSOCKS; i++)
167 if ((socklist[i].sock == sock) && !(socklist[i].flags & SOCK_UNUSED)) {
168 if (operation == EGG_OPTION_SET)
169 socklist[i].flags |= sock_options;
170 else if (operation == EGG_OPTION_UNSET)
171 socklist[i].flags &= ~sock_options;
172 else
173 return -2;
174 return 0;
175 }
176 return -1;
177 }
178
179 /* Return a free entry in the socket entry
180 */
181 int allocsock(int sock, int options)
182 {
183 int i;
184
185 for (i = 0; i < MAXSOCKS; i++) {
186 if (socklist[i].flags & SOCK_UNUSED) break;
187 }
188
189 if (i == MAXSOCKS) {
190 int j;
191
192 /* Expand table by 5 */
193 socklist = (sock_list *)realloc(socklist, (MAXSOCKS+5) * sizeof(sock_list));
194 memset(socklist+MAXSOCKS, 0, 5 * sizeof(sock_list));
195 for (j = 0; j < 5; j++) socklist[MAXSOCKS+j].flags = SOCK_UNUSED;
196 MAXSOCKS += 5;
197 }
198
199 memset(socklist+i, 0, sizeof(sock_list));
200 socklist[i].flags = options;
201 socklist[i].sock = sock;
202 return(i);
203 }
204
205 /* Request a normal socket for i/o
206 */
207 void setsock(int sock, int options)
208 {
209 int i = allocsock(sock, options);
210 int parm;
211
212 if (((sock != STDOUT) || backgrd) &&
213 !(socklist[i].flags & SOCK_NONSOCK)) {
214 parm = 1;
215 setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &parm, sizeof(int));
216
217 parm = 0;
218 setsockopt(sock, SOL_SOCKET, SO_LINGER, (void *) &parm, sizeof(int));
219 }
220 if (options & SOCK_LISTEN) {
221 /* Tris says this lets us grab the same port again next time */
222 parm = 1;
223 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &parm, sizeof(int));
224 }
225 /* Yay async i/o ! */
226 fcntl(sock, F_SETFL, O_NONBLOCK);
227 }
228
229 int getsock(int options)
230 {
231 #ifdef IPV6
232 int sock = socket(AF_INET6, SOCK_STREAM, 0);
233 #else
234 int sock = socket(AF_INET, SOCK_STREAM, 0);
235 #endif
236
237 if (sock >= 0)
238 setsock(sock, options);
239 else
240 putlog(LOG_MISC, "*", "Warning: Can't create new socket!");
241 return sock;
242 }
243
244 /* Done with a socket
245 */
246 void killsock(register int sock)
247 {
248 register int i;
249
250 /* Ignore invalid sockets. */
251 if (sock < 0)
252 return;
253 for (i = 0; i < MAXSOCKS; i++) {
254 if ((socklist[i].sock == sock) && !(socklist[i].flags & SOCK_UNUSED)) {
255 close(socklist[i].sock);
256 if (socklist[i].inbuf != NULL)
257 free_null(socklist[i].inbuf);
258 if (socklist[i].outbuf != NULL) {
259 free_null(socklist[i].outbuf);
260 socklist[i].outbuflen = 0;
261 }
262 socklist[i].flags = SOCK_UNUSED;
263 return;
264 }
265 }
266 putlog(LOG_MISC, "*", "Attempt to kill un-allocated socket %d !!", sock);
267 }
268
269 /* Send connection request to proxy
270 */
271 static int proxy_connect(int sock, char *host, int port, int proxy)
272 {
273 unsigned char x[10];
274 struct hostent *hp;
275 char s[256];
276 int i;
277
278 /* socks proxy */
279 if (proxy == PROXY_SOCKS) {
280 /* numeric IP? */
281 if (host[strlen(host) - 1] >= '0' && host[strlen(host) - 1] <= '9') {
282 IP ip = ((IP) inet_addr(host)); /* drummer */
283 memcpy(x, &ip, 4); /* Beige@Efnet */
284 } else {
285 /* no, must be host.domain */
286 if (!setjmp(alarmret)) {
287 alarm(resolve_timeout);
288 hp = gethostbyname(host);
289 alarm(0);
290 } else {
291 hp = NULL;
292 }
293 if (hp == NULL) {
294 killsock(sock);
295 return -2;
296 }
297 memcpy(x, hp->h_addr, hp->h_length);
298 }
299 for (i = 0; i < MAXSOCKS; i++)
300 if (!(socklist[i].flags & SOCK_UNUSED) && socklist[i].sock == sock)
301 socklist[i].flags |= SOCK_PROXYWAIT; /* drummer */
302 snprintf(s, sizeof s, "\004\001%c%c%c%c%c%c%s", (port >> 8) % 256,
303 (port % 256), x[0], x[1], x[2], x[3], botuser);
304 tputs(sock, s, strlen(botuser) + 9); /* drummer */
305 } else if (proxy == PROXY_SUN) {
306 snprintf(s, sizeof s, "%s %d\n", host, port);
307 tputs(sock, s, strlen(s)); /* drummer */
308 }
309 return sock;
310 }
311
312 /* Starts a connection attempt to a socket
313 *
314 * If given a normal hostname, this will be resolved to the corresponding
315 * IP address first. PLEASE try to use the non-blocking dns functions
316 * instead and then call this function with the IP address to avoid blocking.
317 *
318 * returns <0 if connection refused:
319 * -1 neterror() type error
320 * -2 can't resolve hostname
321 */
322 int open_telnet_raw(int sock, char *server, int sport)
323 {
324 #ifdef IPV6
325 struct sockaddr_in6 name, vname;
326 #else
327 struct sockaddr_in name, vname;
328 #endif
329 struct hostent *hp;
330 char host[121];
331 int i, port;
332 volatile int proxy;
333
334 debug2("|NET| open_telnet_raw: %s %d", server, sport);
335
336 /* firewall? use socks */
337 if (firewall[0]) {
338 if (firewall[0] == '!') {
339 proxy = PROXY_SUN;
340 strcpy(host, &firewall[1]);
341 } else {
342 proxy = PROXY_SOCKS;
343 strcpy(host, firewall);
344 }
345 port = firewallport;
346 } else {
347 proxy = 0;
348 strcpy(host, server);
349 port = sport;
350 }
351
352 memset((char *) &name, 0, sizeof name);
353 #ifdef IPV6
354 name.sin6_family = AF_INET6;
355 name.sin6_port = htons(port);
356 #else
357 name.sin_family = AF_INET;
358 name.sin_port = htons(port);
359 #endif
360
361 if (!setjmp(alarmret)) {
362 char *p;
363 int type;
364
365 alarm(resolve_timeout);
366
367 if (!strncasecmp("ipv6%", host, 5)) {
368 type = AF_INET6;
369 p = host + 5;
370 debug1("|NET| checking only AAAA record for %s", p);
371 } else if (!strncasecmp("ipv4%", host, 5)) {
372 type = AF_INET;
373 p = host + 5;
374 debug1("|NET| checking only A record for %s", p);
375 } else {
376 type = AF_INET; /* af_preferred */
377 p = host;
378 }
379 alarm(resolve_timeout);
380 #ifndef IPV6
381 hp = gethostbyname(p);
382 #else
383 hp = gethostbyname2(p, type);
384 if (!hp && (p == host))
385 hp = gethostbyname2(p, (type == AF_INET6 ? AF_INET : AF_INET6));
386 #endif
387 alarm(0);
388 } else {
389 hp = NULL;
390 }
391 if (hp == NULL)
392 return -2;
393
394 #ifndef IPV6
395 memcpy(&name.sin_addr, hp->h_addr, hp->h_length);
396 name.sin_family = hp->h_addrtype;
397 #else
398 if (hp->h_addrtype == AF_INET6)
399 memcpy(&name.sin6_addr, hp->h_addr, hp->h_length);
400 else if (hp->h_addrtype == AF_INET)
401 name.sin6_addr = ipv4to6(*((unsigned int*) hp->h_addr));
402 else
403 return -123; /* panic :P */
404 name.sin6_family = AF_INET6;
405 #endif
406
407 memset((char *) &vname, 0, sizeof vname);
408 #ifndef IPV6
409 vname.sin_family = AF_INET;
410 vname.sin_addr.s_addr = (myip[0] ? getmyip() : INADDR_ANY);
411 #else
412 vname.sin6_family = AF_INET6;
413 if (IN6_IS_ADDR_V4MAPPED(&name.sin6_addr))
414 vname.sin6_addr = ipv4to6(myip[0] ? getmyip() : INADDR_ANY);
415 else
416 vname.sin6_addr = (myip6[0] ? getmyip6() : in6addr_any);
417 #endif
418 if (bind(sock, (struct sockaddr *) &vname, sizeof vname) < 0)
419 return -1;
420
421 for (i = 0; i < MAXSOCKS; i++) {
422 if (!(socklist[i].flags & SOCK_UNUSED) && (socklist[i].sock == sock))
423 socklist[i].flags = (socklist[i].flags & ~SOCK_VIRTUAL) | SOCK_CONNECT;
424 }
425 if (connect(sock, (struct sockaddr *) &name, (sizeof name)) < 0) {
426 if (errno == EINPROGRESS) {
427 /* Firewall? announce connect attempt to proxy */
428 if (firewall[0])
429 return proxy_connect(sock, server, sport, proxy);
430 return sock; /* async success! */
431 } else
432 return -1;
433 }
434 /* Synchronous? :/ */
435 if (firewall[0])
436 return proxy_connect(sock, server, sport, proxy);
437 return sock;
438 }
439
440 /* Ordinary non-binary connection attempt */
441 int open_telnet(char *server, int port)
442 {
443 int sock = getsock(0),
444 ret = open_telnet_raw(sock, server, port);
445
446 if (ret < 0)
447 killsock(sock);
448 return ret;
449 }
450
451 /* Returns a socket number for a listening socket that will accept any
452 * connection on a certain address -- port # is returned in port
453 * "" means on any address
454 */
455 int open_address_listen(char *addr, int *port)
456 {
457 int sock;
458 unsigned int addrlen;
459 #ifdef IPV6
460 struct sockaddr_in6 name;
461 #else
462 struct sockaddr_in name;
463 #endif
464
465 if (firewall[0]) {
466 /* FIXME: can't do listen port thru firewall yet */
467 putlog(LOG_MISC, "*", "!! Cant open a listen port (you are using a firewall)");
468 return -1;
469 }
470
471 sock = getsock(SOCK_LISTEN);
472 if (sock < 1)
473 return -1;
474
475 debug2("|NET| open_address_listen(\"%s\", %d)", addr, *port);
476
477 memset((char *) &name, 0, sizeof name);
478 #ifdef IPV6
479 name.sin6_family = AF_INET6;
480 name.sin6_port = htons(*port); /* 0 = just assign us a port */
481 if (!addr[0])
482 name.sin6_addr = in6addr_any;
483 else if (!inet_pton(AF_INET6, addr, &name.sin6_addr)) {
484 struct in_addr a4;
485 if (inet_pton(AF_INET, addr, &a4))
486 name.sin6_addr = ipv4to6(a4.s_addr);
487 else
488 name.sin6_addr = in6addr_any;
489 }
490 #else
491 name.sin_family = AF_INET;
492 name.sin_port = htons(*port); /* 0 = just assign us a port */
493 if (addr[0])
494 inet_pton(AF_INET, addr, &name.sin_addr);
495 else
496 name.sin_addr.s_addr = INADDR_ANY;
497 #endif
498 if (bind(sock, (struct sockaddr *) &name, sizeof name) < 0) {
499 killsock(sock);
500 if (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT)
501 return -2;
502 else
503 return -1;
504 }
505 /* what port are we on? */
506 addrlen = sizeof name;
507 if (getsockname(sock, (struct sockaddr *) &name, &addrlen) < 0) {
508 killsock(sock);
509 return -1;
510 }
511 #ifdef IPV6
512 *port = ntohs(name.sin6_port);
513 #else
514 *port = ntohs(name.sin_port);
515 #endif
516 if (listen(sock, 1) < 0) {
517 killsock(sock);
518 return -1;
519 }
520 return sock;
521 }
522
523 /* Returns a socket number for a listening socket that will accept any
524 * connection -- port # is returned in port
525 */
526 inline int open_listen(int *port, int af)
527 {
528 if (af == AF_INET)
529 return open_address_listen(myip, port);
530 #ifdef IPV6
531 else if (af == AF_INET6)
532 return open_address_listen(myip6, port);
533 #endif
534 else
535 return -1;
536 }
537
538 /* Returns the given network byte order IP address in the
539 * dotted format - "##.##.##.##"
540 * (it's IPv4 only, and it's okey - drummer)
541 */
542 char *iptostr(IP ip)
543 {
544 struct in_addr a;
545 static char ipbuf[32];
546
547 a.s_addr = ip;
548 return (char *)inet_ntop(AF_INET, &a, ipbuf, sizeof(ipbuf));
549 }
550
551 char *getlocaladdr(int sock)
552 {
553 static char buf[ADDRLEN];
554 #ifdef IPV6
555 struct sockaddr_in6 sa;
556 #else
557 struct sockaddr_in sa;
558 #endif
559 int len = sizeof sa;
560
561 if (sock == -1) { /* assuming IPv4... */
562 sprintf(buf, "%lu", (unsigned long int)
563 ntohl(natip[0] ? inet_addr(natip) : getmyip()));
564 return buf;
565 }
566
567 if (getsockname(sock, (struct sockaddr*) &sa, &len) == -1) {
568 debug1("|NET| getsockname() failed for sock %d", sock);
569 return 0;
570 }
571 #ifdef IPV6
572 if (IN6_IS_ADDR_V4MAPPED(&sa.sin6_addr))
573 sprintf(buf, "%lu",
574 (unsigned long int) ntohl(((uint32_t *)&sa.sin6_addr)[3]));
575 else
576 inet_ntop(AF_INET6, &(sa.sin6_addr), buf, sizeof buf);
577 #else
578 sprintf(buf, "%lu", (unsigned long int) ntohl(sa.sin_addr.s_addr));
579 #endif
580 return buf;
581 }
582
583 /* Short routine to answer a connect received on a socket made previously
584 * by open_listen ... returns hostname of the caller & the new socket
585 * does NOT dispose of old "public" socket!
586 */
587 int answer(int sock, char *caller, char *ip, unsigned short *port,
588 int binary)
589 {
590 int new_sock;
591 unsigned int addrlen;
592 #ifdef IPV6
593 struct sockaddr_in6 from;
594 #else
595 struct sockaddr_in from;
596 #endif
597
598 addrlen = sizeof from;
599 new_sock = accept(sock, (struct sockaddr *) &from, &addrlen);
600 if (new_sock < 0)
601 return -1;
602 if (ip != NULL) {
603 #ifdef IPV6
604 if (IN6_IS_ADDR_V4MAPPED(&from.sin6_addr))
605 inet_ntop(AF_INET, &(((uint32_t *)&from.sin6_addr)[3]), ip, ADDRMAX);
606 else
607 inet_ntop(AF_INET6, &(from.sin6_addr), ip, ADDRMAX);
608 #else
609 inet_ntop(AF_INET, &(from.sin_addr.s_addr), ip, ADDRMAX);
610 #endif
611 /* This is now done asynchronously. We now only provide the IP address.
612 */
613 strlcpy(caller, ip, 121);
614 }
615 if (port != NULL)
616 #ifdef IPV6
617 *port = ntohs(from.sin6_port);
618 #else
619 *port = ntohs(from.sin_port);
620 #endif
621 /* Set up all the normal socket crap */
622 setsock(new_sock, (binary ? SOCK_BINARY : 0));
623 return new_sock;
624 }
625
626 /* Like open_telnet, but uses server & port specifications of dcc
627 */
628 int open_telnet_dcc(int sock, char *server, char *port)
629 {
630 int p;
631
632 debug2("|NET| open_telnet_dcc: %s %s", server, port);
633 if (port != NULL)
634 p = atoi(port);
635 else
636 return -3;
637 if (server == NULL)
638 return -3;
639 return open_telnet_raw(sock, server, p);
640 }
641
642 void egg_dns_gotanswer(int status, adns_answer *aw, char *origname)
643 {
644 char name[UHOSTLEN];
645 #ifdef IPV6
646 char *orign2;
647 #endif
648
649 if (!aw) {
650 debug0("|DNS| egg_dns_gotanswer: ANSWER IS NULL!");
651 return;
652 }
653 if (!origname) {
654 debug0("|DNS| egg_dns_gotanswer: origname is NULL!");
655 return;
656 }
657
658 debug2("|DNS| egg_dns_gotanswer: status=%d adns_answer=%x", status, (int)aw);
659 status = 0;
660 if ((aw->type == adns_r_addr)
661 #ifdef IPV6
662 || (aw->type == adns_r_addr6)
663 #endif
664 ) {
665 if ((aw->status == adns_s_ok) && (aw->nrrs > 0)) {
666 adns_rr_addr *rrp = aw->rrs.untyped;
667 if (rrp->addr.sa.sa_family == AF_INET) {
668 inet_ntop(AF_INET, &(rrp->addr.inet.sin_addr), name, UHOSTLEN-1);
669 status = 1;
670 #ifdef IPV6
671 } else if (rrp->addr.sa.sa_family == AF_INET6) {
672 inet_ntop(AF_INET6, &(rrp->addr.inet6.sin6_addr), name, UHOSTLEN-1);
673 status = 1;
674 #endif
675 }
676 #ifdef IPV6
677 } else if ((aw->type == adns_r_addr /* af_preferred */) &&
678 strncasecmp(origname, "ipv6%", 5) &&
679 strncasecmp(origname, "ipv4%", 5)) {
680 adns_query q6;
681 orign2 = strdup(origname);
682 /* ...it may be AAAA */
683 debug1("|DNS| egg_dns_gotanswer: A failed, checking for AAAA (%s)", origname);
684 adns_submit(ads, origname, adns_r_addr6, 0, orign2, &q6);
685 status = -1;
686 #endif
687 }
688 if (status == 0)
689 strcpy(name, "0.0.0.0");
690 if (status >= 0) {
691 debug3("|DNS| egg_dns_gotanswer: (ipbyhost) host: %s ip: %s status: %d", origname, name, status);
692 call_ipbyhost(origname, name, status);
693 }
694 } else if ((aw->type == adns_r_ptr_ip6) || (aw->type == adns_r_ptr)) {
695 if ((aw->status == adns_s_ok) && (aw->nrrs > 0)) {
696 if (aw->rrs.str) {
697 strlcpy(name, *(aw->rrs.str), UHOSTLEN);
698 status = 1;
699 }
700 }
701 if (!status) {
702 if (origname)
703 strlcpy(name, origname, UHOSTLEN);
704 else
705 strcpy(name, "error");
706 }
707 debug3("|DNS| egg_dns_gotanswer: (hostbyip) ip: %s host: %s status: %d", origname, name, status);
708 call_hostbyip(origname, name, status);
709 } else
710 debug0("|DNS| egg_dns_gotanswer: got unknow type of answer ?!");
711 free(origname);
712 }
713
714 void egg_dns_checkall()
715 {
716 adns_query q, r;
717 adns_answer *answer;
718 char *origname;
719
720 adns_forallqueries_begin(ads);
721 while ((q = adns_forallqueries_next(ads, (void **)&r)) != NULL) {
722 switch (adns_check(ads, &q, &answer, (void **)&origname)) {
723 case 0: /* ok */
724 egg_dns_gotanswer(1, answer, origname);
725 break;
726 case EAGAIN: /* Go into the queue again */
727 break;
728 default: /* failed */
729 egg_dns_gotanswer(0, answer, origname);
730 break;
731 }
732 }
733 }
734
735 /* Attempts to read from all the sockets in socklist
736 * fills s with up to 511 bytes if available, and returns the array index
737 *
738 * on EOF: returns -1, with socket in len
739 * on socket error: returns -2
740 * if nothing is ready: returns -3
741 */
742 static int sockread(char *s, int *len)
743 {
744 fd_set fd, fdw, fde;
745 int fds, i, x, fdtmp;
746 struct timeval t, tnow;
747 struct timeval *pt = &t;
748 int grab = 511;
749 egg_timeval_t howlong;
750
751 fds = getdtablesize();
752 #ifdef FD_SETSIZE
753 if (fds > FD_SETSIZE)
754 fds = FD_SETSIZE; /* Fixes YET ANOTHER freebsd bug!!! */
755 #endif
756
757 if (timer_get_shortest(&howlong)) {
758 /* No timer, default to 1 second. */
759 t.tv_sec = 1;
760 t.tv_usec = 0;
761 }
762 else {
763 t.tv_sec = howlong.sec;
764 t.tv_usec = howlong.usec;
765 }
766
767 FD_ZERO(&fd);
768
769 for (i = 0; i < MAXSOCKS; i++)
770 if (!(socklist[i].flags & (SOCK_UNUSED | SOCK_VIRTUAL))) {
771 if ((socklist[i].sock == STDOUT) && !backgrd)
772 fdtmp = STDIN;
773 else
774 fdtmp = socklist[i].sock;
775 /*
776 * Looks like that having more than a call, in the same
777 * program, to the FD_SET macro, triggers a bug in gcc.
778 * SIGBUS crashing binaries used to be produced on a number
779 * (prolly all?) of 64 bits architectures.
780 * Make your best to avoid to make it happen again.
781 *
782 * ITE
783 */
784 FD_SET(fdtmp , &fd);
785 }
786 tnow.tv_sec = time(NULL);
787 tnow.tv_usec = 0;
788 adns_beforeselect(ads, &fds, &fd, &fdw, &fde, &pt, 0, &tnow);
789 #ifdef HPUX_HACKS
790 #ifndef HPUX10_HACKS
791 x = select(fds, (int *) &fd, (int *) NULL, (int *) NULL, &t);
792 #else
793 x = select(fds, &fd, NULL, NULL, &t);
794 #endif
795 #else
796 x = select(fds, &fd, NULL, NULL, &t);
797 #endif
798 tnow.tv_sec = time(NULL);
799 tnow.tv_usec = 0;
800 adns_afterselect(ads, fds, &fd, &fdw, &fde, &tnow);
801
802 /* dns stuff */
803 egg_dns_checkall();
804
805 if (x > 0) {
806 /* Something happened */
807 for (i = 0; i < MAXSOCKS; i++) {
808 if ((!(socklist[i].flags & SOCK_UNUSED)) &&
809 ((FD_ISSET(socklist[i].sock, &fd)) ||
810 ((socklist[i].sock == STDOUT) && (!backgrd) &&
811 (FD_ISSET(STDIN, &fd))))) {
812 if (socklist[i].flags & (SOCK_LISTEN | SOCK_CONNECT)) {
813 /* Listening socket -- don't read, just return activity */
814 /* Same for connection attempt */
815 /* (for strong connections, require a read to succeed first) */
816 if (socklist[i].flags & SOCK_PROXYWAIT) { /* drummer */
817 /* Hang around to get the return code from proxy */
818 grab = 10;
819 } else if (!(socklist[i].flags & SOCK_STRONGCONN)) {
820 debug1("net: connect! sock %d", socklist[i].sock);
821 s[0] = 0;
822 *len = 0;
823 return i;
824 }
825 } else if (socklist[i].flags & SOCK_PASS) {
826 s[0] = 0;
827 *len = 0;
828 return i;
829 }
830 if ((socklist[i].sock == STDOUT) && !backgrd)
831 x = read(STDIN, s, grab);
832 else
833 x = read(socklist[i].sock, s, grab);
834 if (x <= 0) { /* eof */
835 if (errno == EAGAIN) {
836 s[0] = 0;
837 *len = 0;
838 return -3;
839 }
840 *len = socklist[i].sock;
841 socklist[i].flags &= ~SOCK_CONNECT;
842 debug1("net: eof!(read) socket %d", socklist[i].sock);
843 return -1;
844 }
845 s[x] = 0;
846 *len = x;
847 if (socklist[i].flags & SOCK_PROXYWAIT) {
848 debug2("net: socket: %d proxy errno: %d", socklist[i].sock, s[1]);
849 socklist[i].flags &= ~(SOCK_CONNECT | SOCK_PROXYWAIT);
850 switch (s[1]) {
851 case 90: /* Success */
852 s[0] = 0;
853 *len = 0;
854 return i;
855 case 91: /* Failed */
856 errno = ECONNREFUSED;
857 break;
858 case 92: /* No identd */
859 case 93: /* Identd said wrong username */
860 /* A better error message would be "socks misconfigured"
861 * or "identd not working" but this is simplest.
862 */
863 errno = ENETUNREACH;
864 break;
865 }
866 *len = socklist[i].sock;
867 return -1;
868 }
869 return i;
870 }
871 }
872 } else if (x == -1)
873 return -2; /* socket error */
874 else {
875 s[0] = 0;
876 *len = 0;
877 }
878 return -3;
879 }
880
881 /* sockgets: buffer and read from sockets
882 *
883 * Attempts to read from all registered sockets for up to one second. if
884 * after one second, no complete data has been received from any of the
885 * sockets, 's' will be empty, 'len' will be 0, and sockgets will return -3.
886 * if there is returnable data received from a socket, the data will be
887 * in 's' (null-terminated if non-binary), the length will be returned
888 * in len, and the socket number will be returned.
889 * normal sockets have their input buffered, and each call to sockgets
890 * will return one line terminated with a '\n'. binary sockets are not
891 * buffered and return whatever coems in as soon as it arrives.
892 * listening sockets will return an empty string when a connection comes in.
893 * connecting sockets will return an empty string on a successful connect,
894 * or EOF on a failed connect.
895 * if an EOF is detected from any of the sockets, that socket number will be
896 * put in len, and -1 will be returned.
897 * the maximum length of the string returned is 512 (including null)
898 *
899 * Returns -4 if we handled something that shouldn't be handled by the
900 * dcc functions. Simply ignore it.
901 */
902
903 int sockgets(char *s, int *len)
904 {
905 char xx[514], *p, *px;
906 int ret, i, data = 0;
907
908 for (i = 0; i < MAXSOCKS; i++) {
909 /* Check for stored-up data waiting to be processed */
910 if (!(socklist[i].flags & SOCK_UNUSED) &&
911 !(socklist[i].flags & SOCK_BUFFER) && (socklist[i].inbuf != NULL)) {
912 if (!(socklist[i].flags & SOCK_BINARY)) {
913 /* look for \r too cos windows can't follow RFCs */
914 p = strchr(socklist[i].inbuf, '\n');
915 if (p == NULL)
916 p = strchr(socklist[i].inbuf, '\r');
917 if (p != NULL) {
918 *p = 0;
919 if (strlen(socklist[i].inbuf) > 510)
920 socklist[i].inbuf[510] = 0;
921 strcpy(s, socklist[i].inbuf);
922 /* Uhm... very strange way to code this... */
923 px = (char *) malloc(strlen(p + 1) + 1);
924 strcpy(px, p + 1);
925 free(socklist[i].inbuf);
926 if (px[0])
927 socklist[i].inbuf = px;
928 else {
929 free(px);
930 socklist[i].inbuf = NULL;
931 }
932 /* Strip CR if this was CR/LF combo */
933 if (s[strlen(s) - 1] == '\r')
934 s[strlen(s) - 1] = 0;
935 *len = strlen(s);
936 return socklist[i].sock;
937 }
938 } else {
939 /* Handling buffered binary data (must have been SOCK_BUFFER before). */
940 if (socklist[i].inbuflen <= 510) {
941 *len = socklist[i].inbuflen;
942 memcpy(s, socklist[i].inbuf, socklist[i].inbuflen);
943 free_null(socklist[i].inbuf);
944 socklist[i].inbuflen = 0;
945 } else {
946 /* Split up into chunks of 510 bytes. */
947 *len = 510;
948 memcpy(s, socklist[i].inbuf, *len);
949 memcpy(socklist[i].inbuf, socklist[i].inbuf + *len, *len);
950 socklist[i].inbuflen -= *len;
951 socklist[i].inbuf = realloc(socklist[i].inbuf,
952 socklist[i].inbuflen);
953 }
954 return socklist[i].sock;
955 }
956 }
957 /* Also check any sockets that might have EOF'd during write */
958 if (!(socklist[i].flags & SOCK_UNUSED)
959 && (socklist[i].flags & SOCK_EOFD)) {
960 s[0] = 0;
961 *len = socklist[i].sock;
962 return -1;
963 }
964 }
965 /* No pent-up data of any worth -- down to business */
966 *len = 0;
967 ret = sockread(xx, len);
968 if (ret < 0) {
969 s[0] = 0;
970 return ret;
971 }
972 /* Binary, listening and passed on sockets don't get buffered. */
973 if (socklist[ret].flags & SOCK_CONNECT) {
974 if (socklist[ret].flags & SOCK_STRONGCONN) {
975 socklist[ret].flags &= ~SOCK_STRONGCONN;
976 /* Buffer any data that came in, for future read. */
977 socklist[ret].inbuflen = *len;
978 socklist[ret].inbuf = (char *) malloc(*len + 1);
979 /* It might be binary data. You never know. */
980 memcpy(socklist[ret].inbuf, xx, *len);
981 socklist[ret].inbuf[*len] = 0;
982 }
983 socklist[ret].flags &= ~SOCK_CONNECT;
984 s[0] = 0;
985 return socklist[ret].sock;
986 }
987 if (socklist[ret].flags & SOCK_BINARY) {
988 memcpy(s, xx, *len);
989 return socklist[ret].sock;
990 }
991 if ((socklist[ret].flags & SOCK_LISTEN) ||
992 (socklist[ret].flags & SOCK_PASS))
993 return socklist[ret].sock;
994 if (socklist[ret].flags & SOCK_BUFFER) {
995 socklist[ret].inbuf = (char *) realloc(socklist[ret].inbuf,
996 socklist[ret].inbuflen + *len + 1);
997 memcpy(socklist[ret].inbuf + socklist[ret].inbuflen, xx, *len);
998 socklist[ret].inbuflen += *len;
999 /* We don't know whether it's binary data. Make sure normal strings
1000 will be handled properly later on too. */
1001 socklist[ret].inbuf[socklist[ret].inbuflen] = 0;
1002 return -4; /* Ignore this one. */
1003 }
1004 /* Might be necessary to prepend stored-up data! */
1005 if (socklist[ret].inbuf != NULL) {
1006 p = socklist[ret].inbuf;
1007 socklist[ret].inbuf = (char *) malloc(strlen(p) + strlen(xx) + 1);
1008 strcpy(socklist[ret].inbuf, p);
1009 strcat(socklist[ret].inbuf, xx);
1010 free(p);
1011 if (strlen(socklist[ret].inbuf) < 512) {
1012 strcpy(xx, socklist[ret].inbuf);
1013 free_null(socklist[ret].inbuf);
1014 socklist[ret].inbuflen = 0;
1015 } else {
1016 p = socklist[ret].inbuf;
1017 socklist[ret].inbuflen = strlen(p) - 510;
1018 socklist[ret].inbuf = (char *) malloc(socklist[ret].inbuflen + 1);
1019 strcpy(socklist[ret].inbuf, p + 510);
1020 *(p + 510) = 0;
1021 strcpy(xx, p);
1022 free(p);
1023 /* (leave the rest to be post-pended later) */
1024 }
1025 }
1026 /* Look for EOL marker; if it's there, i have something to show */
1027 p = strchr(xx, '\n');
1028 if (p == NULL)
1029 p = strchr(xx, '\r');
1030 if (p != NULL) {
1031 *p = 0;
1032 strcpy(s, xx);
1033 strcpy(xx, p + 1);
1034 if (s[strlen(s) - 1] == '\r')
1035 s[strlen(s) - 1] = 0;
1036 data = 1; /* DCC_CHAT may now need to process a
1037 blank line */
1038 /* NO! */
1039 /* if (!s[0]) strcpy(s," "); */
1040 } else {
1041 s[0] = 0;
1042 if (strlen(xx) >= 510) {
1043 /* String is too long, so just insert fake \n */
1044 strcpy(s, xx);
1045 xx[0] = 0;
1046 data = 1;
1047 }
1048 }
1049 *len = strlen(s);
1050 /* Anything left that needs to be saved? */
1051 if (!xx[0]) {
1052 if (data)
1053 return socklist[ret].sock;
1054 else
1055 return -3;
1056 }
1057 /* Prepend old data back */
1058 if (socklist[ret].inbuf != NULL) {
1059 p = socklist[ret].inbuf;
1060 socklist[ret].inbuflen = strlen(p) + strlen(xx);
1061 socklist[ret].inbuf = (char *) malloc(socklist[ret].inbuflen + 1);
1062 strcpy(socklist[ret].inbuf, xx);
1063 strcat(socklist[ret].inbuf, p);
1064 free(p);
1065 } else {
1066 socklist[ret].inbuflen = strlen(xx);
1067 socklist[ret].inbuf = (char *) malloc(socklist[ret].inbuflen + 1);
1068 strcpy(socklist[ret].inbuf, xx);
1069 }
1070 if (data) {
1071 return socklist[ret].sock;
1072 } else {
1073 return -3;
1074 }
1075 }
1076
1077 /* Dump something to a socket
1078 */
1079 void tputs(register int z, char *s, unsigned int len)
1080 {
1081 register int i, x, idx;
1082 char *p;
1083 static int inhere = 0;
1084
1085 if (z < 0)
1086 return; /* um... HELLO?! sanity check please! */
1087 if (((z == STDOUT) || (z == STDERR)) && (!backgrd || use_stderr)) {
1088 write(z, s, len);
1089 return;
1090 }
1091 for (i = 0; i < MAXSOCKS; i++) {
1092 if (!(socklist[i].flags & SOCK_UNUSED) && (socklist[i].sock == z)) {
1093 for (idx = 0; idx < dcc_total; idx++) {
1094 if (dcc[idx].sock == z) {
1095 /* update traffic stats */
1096 traffic_update_out(dcc[idx].type, len);
1097 }
1098 }
1099
1100 if (socklist[i].outbuf != NULL) {
1101 /* Already queueing: just add it */
1102 p = (char *) realloc(socklist[i].outbuf, socklist[i].outbuflen + len);
1103 memcpy(p + socklist[i].outbuflen, s, len);
1104 socklist[i].outbuf = p;
1105 socklist[i].outbuflen += len;
1106 return;
1107 }
1108 /* Try. */
1109 x = write(z, s, len);
1110 if (x == (-1))
1111 x = 0;
1112 if (x < len) {
1113 /* Socket is full, queue it */
1114 socklist[i].outbuf = (char *) malloc(len - x);
1115 memcpy(socklist[i].outbuf, &s[x], len - x);
1116 socklist[i].outbuflen = len - x;
1117 }
1118 return;
1119 }
1120 }
1121 /* Make sure we don't cause a crash by looping here */
1122 if (!inhere) {
1123 inhere = 1;
1124
1125 putlog(LOG_MISC, "*", "!!! writing to nonexistent socket: %d", z);
1126 s[strlen(s) - 1] = 0;
1127 putlog(LOG_MISC, "*", "!-> '%s'", s);
1128
1129 inhere = 0;
1130 }
1131 }
1132
1133 /* tputs might queue data for sockets, let's dump as much of it as
1134 * possible.
1135 */
1136 void dequeue_sockets()
1137 {
1138 int i, x;
1139
1140 for (i = 0; i < MAXSOCKS; i++) {
1141 if (!(socklist[i].flags & SOCK_UNUSED) &&
1142 socklist[i].outbuf != NULL) {
1143 /* Trick tputs into doing the work */
1144 x = write(socklist[i].sock, socklist[i].outbuf,
1145 socklist[i].outbuflen);
1146 if ((x < 0) && (errno != EAGAIN)
1147 #ifdef EBADSLT
1148 && (errno != EBADSLT)
1149 #endif
1150 #ifdef ENOTCONN
1151 && (errno != ENOTCONN)
1152 #endif
1153 ) {
1154 /* This detects an EOF during writing */
1155 debug3("net: eof!(write) socket %d (%s,%d)", socklist[i].sock,
1156 strerror(errno), errno);
1157 socklist[i].flags |= SOCK_EOFD;
1158 } else if (x == socklist[i].outbuflen) {
1159 /* If the whole buffer was sent, nuke it */
1160 free_null(socklist[i].outbuf);
1161 socklist[i].outbuflen = 0;
1162 } else if (x > 0) {
1163 char *p = socklist[i].outbuf;
1164
1165 /* This removes any sent bytes from the beginning of the buffer */
1166 socklist[i].outbuf = (char *) malloc(socklist[i].outbuflen - x);
1167 memcpy(socklist[i].outbuf, p + x, socklist[i].outbuflen - x);
1168 socklist[i].outbuflen -= x;
1169 free(p);
1170 }
1171
1172 /* All queued data was sent. Call handler if one exists and the
1173 * dcc entry wants it.
1174 */
1175 if (!socklist[i].outbuf) {
1176 }
1177 }
1178 }
1179 }
1180
1181
1182 /*
1183 * Debugging stuff
1184 */
1185
1186 void tell_netdebug(int idx)
1187 {
1188 int i;
1189 char s[80];
1190
1191 dprintf(idx, "Open sockets:");
1192 for (i = 0; i < MAXSOCKS; i++) {
1193 if (!(socklist[i].flags & SOCK_UNUSED)) {
1194 sprintf(s, " %d", socklist[i].sock);
1195 if (socklist[i].flags & SOCK_BINARY)
1196 strcat(s, " (binary)");
1197 if (socklist[i].flags & SOCK_LISTEN)
1198 strcat(s, " (listen)");
1199 if (socklist[i].flags & SOCK_PASS)
1200 strcat(s, " (passed on)");
1201 if (socklist[i].flags & SOCK_CONNECT)
1202 strcat(s, " (connecting)");
1203 if (socklist[i].flags & SOCK_STRONGCONN)
1204 strcat(s, " (strong)");
1205 if (socklist[i].flags & SOCK_NONSOCK)
1206 strcat(s, " (file)");
1207 if (socklist[i].inbuf != NULL)
1208 sprintf(&s[strlen(s)], " (inbuf: %04X)", strlen(socklist[i].inbuf));
1209 if (socklist[i].outbuf != NULL)
1210 sprintf(&s[strlen(s)], " (outbuf: %06lX)", socklist[i].outbuflen);
1211 strcat(s, ",");
1212 dprintf(idx, "%s", s);
1213 }
1214 }
1215 dprintf(idx, " done.\n");
1216 }
1217
1218 /* Checks wether the referenced socket has data queued.
1219 *
1220 * Returns true if the incoming/outgoing (depending on 'type') queues
1221 * contain data, otherwise false.
1222 */
1223 int sock_has_data(int type, int sock)
1224 {
1225 int ret = 0, i;
1226
1227 for (i = 0; i < MAXSOCKS; i++)
1228 if (!(socklist[i].flags & SOCK_UNUSED) && socklist[i].sock == sock)
1229 break;
1230 if (i < MAXSOCKS) {
1231 switch (type) {
1232 case SOCK_DATA_OUTGOING:
1233 ret = (socklist[i].outbuf != NULL);
1234 break;
1235 case SOCK_DATA_INCOMING:
1236 ret = (socklist[i].inbuf != NULL);
1237 break;
1238 }
1239 } else
1240 debug1("sock_has_data: could not find socket #%d, returning false.", sock);
1241 return ret;
1242 }
1243
1244 /* flush_inbuf():
1245 * checks if there's data in the incoming buffer of an connection
1246 * and flushs the buffer if possible
1247 *
1248 * returns: -1 if the dcc entry wasn't found
1249 * -2 if dcc[idx].type->activity doesn't exist and the data couldn't
1250 * be handled
1251 * 0 if buffer was empty
1252 * otherwise length of flushed buffer
1253 */
1254 int flush_inbuf(int idx)
1255 {
1256 int i;
1257 char *inbuf;
1258
1259 assert((idx >= 0) && (idx < dcc_total));
1260 for (i = 0; i < MAXSOCKS; i++) {
1261 if ((dcc[idx].sock == socklist[i].sock) &&
1262 !(socklist[i].flags & SOCK_UNUSED)) {
1263 int len = socklist[i].inbuflen;
1264
1265 if ((len > 0) && socklist[i].inbuf) {
1266 if (dcc[idx].type && dcc[idx].type->activity) {
1267 inbuf = socklist[i].inbuf;
1268 socklist[i].inbuf = NULL;
1269 dcc[idx].type->activity(idx, inbuf, len);
1270 free(inbuf);
1271 return len;
1272 } else
1273 return -2;
1274 } else
1275 return 0;
1276 }
1277 }
1278 return -1;
1279 }

webmaster@eggheads.org
ViewVC Help
Powered by ViewVC 1.1.23