/[cvs]/eggdrop1.9/src/net.c
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Revision 1.39 - (show annotations) (download) (as text)
Sun Aug 19 02:24:41 2001 UTC (17 years, 10 months ago) by drummer
Branch: MAIN
Changes since 1.38: +2 -2 lines
File MIME type: text/x-chdr
Small changes to ipv6 detection to fail on cygwin

1 /*
2 * net.c -- handles:
3 * all raw network i/o
4 *
5 * $Id: net.c,v 1.38 2001/08/13 14:51:12 guppy Exp $
6 */
7 /*
8 * This is hereby released into the public domain.
9 * Robey Pointer, robey@netcom.com
10 */
11
12 #include <fcntl.h>
13 #include "main.h"
14 #include <limits.h>
15 #include <string.h>
16 #include <netdb.h>
17 #include <sys/socket.h>
18 #if HAVE_SYS_SELECT_H
19 # include <sys/select.h>
20 #endif
21 #include <netinet/in.h>
22 #include <arpa/inet.h>
23 #include <errno.h>
24 #if HAVE_UNISTD_H
25 # include <unistd.h>
26 #endif
27 #include <setjmp.h>
28
29 #include "adns/adns.h"
30
31 #if !HAVE_GETDTABLESIZE
32 # ifdef FD_SETSIZE
33 # define getdtablesize() FD_SETSIZE
34 # else
35 # define getdtablesize() 200
36 # endif
37 #endif
38
39 #ifndef IN6_IS_ADDR_V4MAPPED
40 # define IN6_IS_ADDR_V4MAPPED(a) \
41 ((((uint32_t *) (a))[0] == 0) && (((uint32_t *) (a))[1] == 0) && \
42 (((uint32_t *) (a))[2] == htonl (0xffff)))
43 #endif
44
45 extern struct dcc_t *dcc;
46 extern int backgrd, use_stderr, resolve_timeout, dcc_total;
47 extern unsigned long otraffic_irc_today, otraffic_bn_today,
48 otraffic_dcc_today, otraffic_filesys_today,
49 otraffic_trans_today, otraffic_unknown_today;
50 extern char natip[];
51
52 char hostname[121] = ""; /* Hostname can be specified in the config
53 file */
54 char myip[121] = ""; /* IP can be specified in the config file */
55 char myip6[121] = ""; /* IP6 can be specified in the config file */
56 char firewall[121] = ""; /* Socks server for firewall */
57 int firewallport = 1080; /* Default port of Sock4/5 firewalls */
58 char botuser[21] = "eggdrop"; /* Username of the user running the bot */
59 sock_list *socklist = NULL; /* Enough to be safe */
60 int MAXSOCKS = 0;
61 jmp_buf alarmret; /* Env buffer for alarm() returns */
62
63 adns_state ads;
64
65 /* Types of proxy */
66 #define PROXY_SOCKS 1
67 #define PROXY_SUN 2
68
69
70 /* I need an UNSIGNED long for dcc type stuff
71 */
72 IP my_atoul(char *s)
73 {
74 IP ret = 0;
75
76 while ((*s >= '0') && (*s <= '9')) {
77 ret *= 10;
78 ret += ((*s) - '0');
79 s++;
80 }
81 return ret;
82 }
83
84 /* Initialize the socklist
85 */
86 void init_net()
87 {
88 int i;
89
90 for (i = 0; i < MAXSOCKS; i++) {
91 socklist[i].flags = SOCK_UNUSED;
92 }
93
94 /* init ADNS */
95 i = adns_init(&ads, adns_if_noautosys, 0);
96 if (i)
97 fatal(adns_strerror(i), 0);
98 }
99
100 int expmem_net()
101 {
102 int i, tot = 0;
103
104 for (i = 0; i < MAXSOCKS; i++) {
105 if (!(socklist[i].flags & SOCK_UNUSED)) {
106 if (socklist[i].inbuf != NULL)
107 tot += strlen(socklist[i].inbuf) + 1;
108 if (socklist[i].outbuf != NULL)
109 tot += socklist[i].outbuflen;
110 }
111 }
112 return tot;
113 }
114
115 /* Get my ip number
116 */
117 IP getmyip()
118 {
119 struct hostent *hp;
120 char s[121];
121 IP ip;
122 struct in_addr *in;
123
124 /* Could be pre-defined */
125 if (myip[0]) {
126 if ((myip[strlen(myip) - 1] >= '0') && (myip[strlen(myip) - 1] <= '9'))
127 return (IP) inet_addr(myip);
128 }
129 /* Also could be pre-defined */
130 if (hostname[0])
131 hp = gethostbyname(hostname);
132 else {
133 gethostname(s, 120);
134 hp = gethostbyname(s);
135 }
136 if (hp == NULL)
137 fatal("Hostname self-lookup failed.", 0);
138 in = (struct in_addr *) (hp->h_addr_list[0]);
139 ip = (IP) (in->s_addr);
140 return ip;
141 }
142
143 #ifdef IPV6
144 struct in6_addr getmyip6()
145 {
146 struct in6_addr ip;
147
148 /* Could be pre-defined */
149 if (myip6[0])
150 egg_inet_pton(AF_INET6, myip6, &ip);
151 else {
152 /* get system's default IPv6 ip -- FIXME!! */
153 /* there is know way?! - drummer */
154 ip = in6addr_any;
155 }
156 return ip;
157 }
158
159 struct in6_addr ipv4to6(IP a)
160 {
161 struct in6_addr ip;
162 if (a == INADDR_ANY)
163 return in6addr_any;
164 else {
165 ((uint32_t *)&ip)[0] = 0;
166 ((uint32_t *)&ip)[1] = 0;
167 ((uint16_t *)&ip)[4] = 0;
168 ((uint16_t *)&ip)[5] = 0xffff;
169 ((uint32_t *)&ip)[3] = a;
170 }
171 return ip;
172 }
173
174 #endif
175
176 void neterror(char *s)
177 {
178 switch (errno) {
179 case EADDRINUSE:
180 strcpy(s, "Address already in use");
181 break;
182 case EADDRNOTAVAIL:
183 strcpy(s, "Address invalid on remote machine");
184 break;
185 case EAFNOSUPPORT:
186 strcpy(s, "Address family not supported");
187 break;
188 case EALREADY:
189 strcpy(s, "Socket already in use");
190 break;
191 case EBADF:
192 strcpy(s, "Socket descriptor is bad");
193 break;
194 case ECONNREFUSED:
195 strcpy(s, "Connection refused");
196 break;
197 case EFAULT:
198 strcpy(s, "Namespace segment violation");
199 break;
200 case EINPROGRESS:
201 strcpy(s, "Operation in progress");
202 break;
203 case EINTR:
204 strcpy(s, "Timeout");
205 break;
206 case EINVAL:
207 strcpy(s, "Invalid namespace");
208 break;
209 case EISCONN:
210 strcpy(s, "Socket already connected");
211 break;
212 case ENETUNREACH:
213 strcpy(s, "Network unreachable");
214 break;
215 case ENOTSOCK:
216 strcpy(s, "File descriptor, not a socket");
217 break;
218 case ETIMEDOUT:
219 strcpy(s, "Connection timed out");
220 break;
221 case ENOTCONN:
222 strcpy(s, "Socket is not connected");
223 break;
224 case EHOSTUNREACH:
225 strcpy(s, "Host is unreachable");
226 break;
227 case EPIPE:
228 strcpy(s, "Broken pipe");
229 break;
230 #ifdef ECONNRESET
231 case ECONNRESET:
232 strcpy(s, "Connection reset by peer");
233 break;
234 #endif
235 #ifdef EACCES
236 case EACCES:
237 strcpy(s, "Permission denied");
238 break;
239 #endif
240 case 0:
241 strcpy(s, "Error 0");
242 break;
243 default:
244 sprintf(s, "Unforseen error %d", errno);
245 break;
246 }
247 }
248
249 /* Sets/Unsets options for a specific socket.
250 *
251 * Returns: 0 - on success
252 * -1 - socket not found
253 * -2 - illegal operation
254 */
255 int sockoptions(int sock, int operation, int sock_options)
256 {
257 int i;
258
259 for (i = 0; i < MAXSOCKS; i++)
260 if ((socklist[i].sock == sock) && !(socklist[i].flags & SOCK_UNUSED)) {
261 if (operation == EGG_OPTION_SET)
262 socklist[i].flags |= sock_options;
263 else if (operation == EGG_OPTION_UNSET)
264 socklist[i].flags &= ~sock_options;
265 else
266 return -2;
267 return 0;
268 }
269 return -1;
270 }
271
272 /* Return a free entry in the socket entry
273 */
274 int allocsock(int sock, int options)
275 {
276 int i;
277
278 for (i = 0; i < MAXSOCKS; i++) {
279 if (socklist[i].flags & SOCK_UNUSED) {
280 /* yay! there is table space */
281 socklist[i].inbuf = socklist[i].outbuf = NULL;
282 socklist[i].inbuflen = socklist[i].outbuflen = 0;
283 socklist[i].flags = options;
284 socklist[i].sock = sock;
285 return i;
286 }
287 }
288 fatal("Socket table is full!", 0);
289 return -1; /* Never reached */
290 }
291
292 /* Request a normal socket for i/o
293 */
294 void setsock(int sock, int options)
295 {
296 int i = allocsock(sock, options);
297 int parm;
298
299 if (((sock != STDOUT) || backgrd) &&
300 !(socklist[i].flags & SOCK_NONSOCK)) {
301 parm = 1;
302 setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &parm, sizeof(int));
303
304 parm = 0;
305 setsockopt(sock, SOL_SOCKET, SO_LINGER, (void *) &parm, sizeof(int));
306 }
307 if (options & SOCK_LISTEN) {
308 /* Tris says this lets us grab the same port again next time */
309 parm = 1;
310 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &parm, sizeof(int));
311 }
312 /* Yay async i/o ! */
313 fcntl(sock, F_SETFL, O_NONBLOCK);
314 }
315
316 int getsock(int options)
317 {
318 #ifdef IPV6
319 int sock = socket(AF_INET6, SOCK_STREAM, 0);
320 #else
321 int sock = socket(AF_INET, SOCK_STREAM, 0);
322 #endif
323
324 if (sock >= 0)
325 setsock(sock, options);
326 else
327 putlog(LOG_MISC, "*", "Warning: Can't create new socket!");
328 return sock;
329 }
330
331 /* Done with a socket
332 */
333 void killsock(register int sock)
334 {
335 register int i;
336
337 /* Ignore invalid sockets. */
338 if (sock < 0)
339 return;
340 for (i = 0; i < MAXSOCKS; i++) {
341 if ((socklist[i].sock == sock) && !(socklist[i].flags & SOCK_UNUSED)) {
342 close(socklist[i].sock);
343 if (socklist[i].inbuf != NULL) {
344 nfree(socklist[i].inbuf);
345 socklist[i].inbuf = NULL;
346 }
347 if (socklist[i].outbuf != NULL) {
348 nfree(socklist[i].outbuf);
349 socklist[i].outbuf = NULL;
350 socklist[i].outbuflen = 0;
351 }
352 socklist[i].flags = SOCK_UNUSED;
353 return;
354 }
355 }
356 putlog(LOG_MISC, "*", "Attempt to kill un-allocated socket %d !!", sock);
357 }
358
359 /* Send connection request to proxy
360 */
361 static int proxy_connect(int sock, char *host, int port, int proxy)
362 {
363 unsigned char x[10];
364 struct hostent *hp;
365 char s[256];
366 int i;
367
368 /* socks proxy */
369 if (proxy == PROXY_SOCKS) {
370 /* numeric IP? */
371 if (host[strlen(host) - 1] >= '0' && host[strlen(host) - 1] <= '9') {
372 IP ip = ((IP) inet_addr(host)); /* drummer */
373 egg_memcpy(x, &ip, 4); /* Beige@Efnet */
374 } else {
375 /* no, must be host.domain */
376 if (!setjmp(alarmret)) {
377 alarm(resolve_timeout);
378 hp = gethostbyname(host);
379 alarm(0);
380 } else {
381 hp = NULL;
382 }
383 if (hp == NULL) {
384 killsock(sock);
385 return -2;
386 }
387 egg_memcpy(x, hp->h_addr, hp->h_length);
388 }
389 for (i = 0; i < MAXSOCKS; i++)
390 if (!(socklist[i].flags & SOCK_UNUSED) && socklist[i].sock == sock)
391 socklist[i].flags |= SOCK_PROXYWAIT; /* drummer */
392 egg_snprintf(s, sizeof s, "\004\001%c%c%c%c%c%c%s", (port >> 8) % 256,
393 (port % 256), x[0], x[1], x[2], x[3], botuser);
394 tputs(sock, s, strlen(botuser) + 9); /* drummer */
395 } else if (proxy == PROXY_SUN) {
396 egg_snprintf(s, sizeof s, "%s %d\n", host, port);
397 tputs(sock, s, strlen(s)); /* drummer */
398 }
399 return sock;
400 }
401
402 /* Starts a connection attempt to a socket
403 *
404 * If given a normal hostname, this will be resolved to the corresponding
405 * IP address first. PLEASE try to use the non-blocking dns functions
406 * instead and then call this function with the IP address to avoid blocking.
407 *
408 * returns <0 if connection refused:
409 * -1 neterror() type error
410 * -2 can't resolve hostname
411 */
412 int open_telnet_raw(int sock, char *server, int sport)
413 {
414 #ifdef IPV6
415 struct sockaddr_in6 name, vname;
416 #else
417 struct sockaddr_in name, vname;
418 #endif
419 struct hostent *hp;
420 char host[121];
421 int i, port;
422 volatile int proxy;
423
424 debug2("|NET| open_telnet_raw: %s %d", server, sport);
425
426 /* firewall? use socks */
427 if (firewall[0]) {
428 if (firewall[0] == '!') {
429 proxy = PROXY_SUN;
430 strcpy(host, &firewall[1]);
431 } else {
432 proxy = PROXY_SOCKS;
433 strcpy(host, firewall);
434 }
435 port = firewallport;
436 } else {
437 proxy = 0;
438 strcpy(host, server);
439 port = sport;
440 }
441
442 egg_bzero((char *) &name, sizeof name);
443 #ifdef IPV6
444 name.sin6_family = AF_INET6;
445 name.sin6_port = htons(port);
446 #else
447 name.sin_family = AF_INET;
448 name.sin_port = htons(port);
449 #endif
450
451 if (!setjmp(alarmret)) {
452 char *p;
453 int type;
454
455 alarm(resolve_timeout);
456
457 if (!egg_strncasecmp("ipv6%", host, 5)) {
458 type = AF_INET6;
459 p = host + 5;
460 debug1("|NET| checking only AAAA record for %s", p);
461 } else if (!egg_strncasecmp("ipv4%", host, 5)) {
462 type = AF_INET;
463 p = host + 5;
464 debug1("|NET| checking only A record for %s", p);
465 } else {
466 type = AF_INET; /* af_preferred */
467 p = host;
468 }
469 alarm(resolve_timeout);
470 #ifndef IPV6
471 hp = gethostbyname(p);
472 #else
473 hp = gethostbyname2(p, type);
474 if (!hp && (p == host))
475 hp = gethostbyname2(p, (type == AF_INET6 ? AF_INET : AF_INET6));
476 #endif
477 alarm(0);
478 } else {
479 hp = NULL;
480 }
481 if (hp == NULL)
482 return -2;
483
484 #ifndef IPV6
485 egg_memcpy(&name.sin_addr, hp->h_addr, hp->h_length);
486 name.sin_family = hp->h_addrtype;
487 #else
488 if (hp->h_addrtype == AF_INET6)
489 egg_memcpy(&name.sin6_addr, hp->h_addr, hp->h_length);
490 else if (hp->h_addrtype == AF_INET)
491 name.sin6_addr = ipv4to6(*((unsigned int*) hp->h_addr));
492 else
493 return -123; /* panic :P */
494 name.sin6_family = AF_INET6;
495 #endif
496
497 egg_bzero((char *) &vname, sizeof vname);
498 #ifndef IPV6
499 vname.sin_family = AF_INET;
500 vname.sin_addr.s_addr = (myip[0] ? getmyip() : INADDR_ANY);
501 #else
502 vname.sin6_family = AF_INET6;
503 if (IN6_IS_ADDR_V4MAPPED(&name.sin6_addr))
504 vname.sin6_addr = ipv4to6(myip[0] ? getmyip() : INADDR_ANY);
505 else
506 vname.sin6_addr = (myip6[0] ? getmyip6() : in6addr_any);
507 #endif
508 if (bind(sock, (struct sockaddr *) &vname, sizeof vname) < 0)
509 return -1;
510
511 for (i = 0; i < MAXSOCKS; i++) {
512 if (!(socklist[i].flags & SOCK_UNUSED) && (socklist[i].sock == sock))
513 socklist[i].flags = (socklist[i].flags & ~SOCK_VIRTUAL) | SOCK_CONNECT;
514 }
515 if (connect(sock, (struct sockaddr *) &name, (sizeof name)) < 0) {
516 if (errno == EINPROGRESS) {
517 /* Firewall? announce connect attempt to proxy */
518 if (firewall[0])
519 return proxy_connect(sock, server, sport, proxy);
520 return sock; /* async success! */
521 } else
522 return -1;
523 }
524 /* Synchronous? :/ */
525 if (firewall[0])
526 return proxy_connect(sock, server, sport, proxy);
527 return sock;
528 }
529
530 /* Ordinary non-binary connection attempt */
531 int open_telnet(char *server, int port)
532 {
533 int sock = getsock(0),
534 ret = open_telnet_raw(sock, server, port);
535
536 if (ret < 0)
537 killsock(sock);
538 return ret;
539 }
540
541 /* Returns a socket number for a listening socket that will accept any
542 * connection on a certain address -- port # is returned in port
543 * "" means on any address
544 */
545 int open_address_listen(char *addr, int *port)
546 {
547 int sock;
548 unsigned int addrlen;
549 #ifdef IPV6
550 struct sockaddr_in6 name;
551 #else
552 struct sockaddr_in name;
553 #endif
554
555 if (firewall[0]) {
556 /* FIXME: can't do listen port thru firewall yet */
557 putlog(LOG_MISC, "*", "!! Cant open a listen port (you are using a firewall)");
558 return -1;
559 }
560
561 sock = getsock(SOCK_LISTEN);
562 if (sock < 1)
563 return -1;
564
565 debug2("|NET| open_address_listen(\"%s\", %d)", addr, *port);
566
567 egg_bzero((char *) &name, sizeof name);
568 #ifdef IPV6
569 name.sin6_family = AF_INET6;
570 name.sin6_port = htons(*port); /* 0 = just assign us a port */
571 if (!addr[0])
572 name.sin6_addr = in6addr_any;
573 else if (!egg_inet_pton(AF_INET6, addr, &name.sin6_addr)) {
574 struct in_addr a4;
575 if (egg_inet_aton(addr, &a4))
576 name.sin6_addr = ipv4to6(a4.s_addr);
577 else
578 name.sin6_addr = in6addr_any;
579 }
580 #else
581 name.sin_family = AF_INET;
582 name.sin_port = htons(*port); /* 0 = just assign us a port */
583 if (addr[0])
584 egg_inet_aton(addr, &name.sin_addr);
585 else
586 name.sin_addr.s_addr = INADDR_ANY;
587 #endif
588 if (bind(sock, (struct sockaddr *) &name, sizeof name) < 0) {
589 killsock(sock);
590 if (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT)
591 return -2;
592 else
593 return -1;
594 }
595 /* what port are we on? */
596 addrlen = sizeof name;
597 if (getsockname(sock, (struct sockaddr *) &name, &addrlen) < 0) {
598 killsock(sock);
599 return -1;
600 }
601 #ifdef IPV6
602 *port = ntohs(name.sin6_port);
603 #else
604 *port = ntohs(name.sin_port);
605 #endif
606 if (listen(sock, 1) < 0) {
607 killsock(sock);
608 return -1;
609 }
610 return sock;
611 }
612
613 /* Returns a socket number for a listening socket that will accept any
614 * connection -- port # is returned in port
615 */
616 inline int open_listen(int *port, int af)
617 {
618 if (af == AF_INET)
619 return open_address_listen(myip, port);
620 #ifdef IPV6
621 else if (af == AF_INET6)
622 return open_address_listen(myip6, port);
623 #endif
624 else
625 return -1;
626 }
627
628 /* Given a network-style IP address, returns the hostname. The hostname
629 * will be in the "##.##.##.##" format if there was an error.
630 *
631 * NOTE: This function is depreciated. Try using the async dns approach
632 * instead.
633 */
634 char *hostnamefromip(unsigned long ip)
635 {
636 struct hostent *hp;
637 unsigned long addr = ip;
638 unsigned char *p;
639 static char s[UHOSTLEN];
640
641 if (!setjmp(alarmret)) {
642 alarm(resolve_timeout);
643 hp = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET);
644 alarm(0);
645 } else {
646 hp = NULL;
647 }
648 if (hp == NULL) {
649 p = (unsigned char *) &addr;
650 sprintf(s, "%u.%u.%u.%u", p[0], p[1], p[2], p[3]);
651 return s;
652 }
653 strncpyz(s, hp->h_name, sizeof s);
654 return s;
655 }
656
657 /* Returns the given network byte order IP address in the
658 * dotted format - "##.##.##.##"
659 * (it's IPv4 only, and it's okey - drummer)
660 */
661 char *iptostr(IP ip)
662 {
663 struct in_addr a;
664
665 a.s_addr = ip;
666 return inet_ntoa(a);
667 }
668
669 char *getlocaladdr(int sock)
670 {
671 static char buf[ADDRLEN];
672 #ifdef IPV6
673 struct sockaddr_in6 sa;
674 #else
675 struct sockaddr_in sa;
676 #endif
677 int len = sizeof sa;
678
679 if (sock == -1) { /* assuming IPv4... */
680 sprintf(buf, "%lu", (unsigned long int)
681 ntohl(natip[0] ? inet_addr(natip) : getmyip()));
682 return buf;
683 }
684
685 if (getsockname(sock, (struct sockaddr*) &sa, &len) == -1) {
686 debug1("|NET| getsockname() failed for sock %d", sock);
687 return 0;
688 }
689 #ifdef IPV6
690 if (IN6_IS_ADDR_V4MAPPED(&sa.sin6_addr))
691 sprintf(buf, "%lu",
692 (unsigned long int) ntohl(((uint32_t *)&sa.sin6_addr)[3]));
693 else
694 egg_inet_ntop(AF_INET6, &(sa.sin6_addr), buf, sizeof buf);
695 #else
696 sprintf(buf, "%lu", (unsigned long int) ntohl(sa.sin_addr.s_addr));
697 #endif
698 return buf;
699 }
700
701 /* Short routine to answer a connect received on a socket made previously
702 * by open_listen ... returns hostname of the caller & the new socket
703 * does NOT dispose of old "public" socket!
704 */
705 int answer(int sock, char *caller, char *ip, unsigned short *port,
706 int binary)
707 {
708 int new_sock;
709 unsigned int addrlen;
710 #ifdef IPV6
711 struct sockaddr_in6 from;
712 #else
713 struct sockaddr_in from;
714 #endif
715
716 addrlen = sizeof from;
717 new_sock = accept(sock, (struct sockaddr *) &from, &addrlen);
718 if (new_sock < 0)
719 return -1;
720 if (ip != NULL) {
721 #ifdef IPV6
722 if (IN6_IS_ADDR_V4MAPPED(&from.sin6_addr))
723 egg_inet_ntop(AF_INET, &(((uint32_t *)&from.sin6_addr)[3]), ip, ADDRMAX);
724 else
725 egg_inet_ntop(AF_INET6, &(from.sin6_addr), ip, ADDRMAX);
726 #else
727 egg_inet_ntop(AF_INET, &(from.sin_addr.s_addr), ip, ADDRMAX);
728 #endif
729 /* This is now done asynchronously. We now only provide the IP address.
730 *
731 * strncpy(caller, hostnamefromip(*ip), 120);
732 */
733 strncpyz(caller, ip, 121);
734 }
735 if (port != NULL)
736 #ifdef IPV6
737 *port = ntohs(from.sin6_port);
738 #else
739 *port = ntohs(from.sin_port);
740 #endif
741 /* Set up all the normal socket crap */
742 setsock(new_sock, (binary ? SOCK_BINARY : 0));
743 return new_sock;
744 }
745
746 /* Like open_telnet, but uses server & port specifications of dcc
747 */
748 int open_telnet_dcc(int sock, char *server, char *port)
749 {
750 int p;
751 struct in_addr ia;
752
753 debug2("|NET| open_telnet_dcc: %s %s", server, port);
754 if (port != NULL)
755 p = atoi(port);
756 else
757 return -3;
758 if (server == NULL)
759 return -3;
760 /* fix the IPv4 IP format (ie: 167772161 -> 10.0.0.1) */
761 if (egg_inet_aton(server, &ia))
762 return open_telnet_raw(sock, inet_ntoa(ia), p);
763 else
764 return open_telnet_raw(sock, server, p);
765 }
766
767 void egg_dns_gotanswer(int status, adns_answer *aw, char *origname)
768 {
769 char name[UHOSTLEN];
770
771 if (!aw) {
772 debug0("|DNS| egg_dns_gotanswer: ANSWER IS NULL!");
773 return;
774 }
775 if (!origname) {
776 debug0("|DNS| egg_dns_gotanswer: origname is NULL!");
777 return;
778 }
779
780 debug2("|DNS| egg_dns_gotanswer: status=%d adns_answer=%x", status, (int)aw);
781 status = 0;
782 if ((aw->type == adns_r_addr)
783 #ifdef IPV6
784 || (aw->type == adns_r_addr6)
785 #endif
786 ) {
787 if ((aw->status == adns_s_ok) && (aw->nrrs > 0)) {
788 adns_rr_addr *rrp = aw->rrs.untyped;
789 if (rrp->addr.sa.sa_family == AF_INET) {
790 egg_inet_ntop(AF_INET, &(rrp->addr.inet.sin_addr), name, UHOSTLEN-1);
791 status = 1;
792 #ifdef IPV6
793 } else if (rrp->addr.sa.sa_family == AF_INET6) {
794 egg_inet_ntop(AF_INET6, &(rrp->addr.inet6.sin6_addr), name, UHOSTLEN-1);
795 status = 1;
796 #endif
797 }
798 #ifdef IPV6
799 } else if ((aw->type == adns_r_addr /* af_preferred */) &&
800 egg_strncasecmp(origname, "ipv6%", 5) &&
801 egg_strncasecmp(origname, "ipv4%", 5)) {
802 adns_query q6;
803 char *orign2 = (char*) nmalloc(strlen(origname) + 1);
804 strcpy(orign2, origname);
805 /* ...it may be AAAA */
806 debug1("|DNS| egg_dns_gotanswer: A failed, checking for AAAA (%s)", origname);
807 adns_submit(ads, origname, adns_r_addr6, 0, orign2, &q6);
808 status = -1;
809 #endif
810 }
811 if (status == 0)
812 strcpy(name, "0.0.0.0");
813 if (status >= 0) {
814 debug3("|DNS| egg_dns_gotanswer: (ipbyhost) host: %s ip: %s status: %d", origname, name, status);
815 call_ipbyhost(origname, name, status);
816 }
817 } else if ((aw->type == adns_r_ptr_ip6) || (aw->type == adns_r_ptr)) {
818 if ((aw->status == adns_s_ok) && (aw->nrrs > 0)) {
819 if (aw->rrs.str) {
820 strncpyz(name, *(aw->rrs.str), UHOSTLEN);
821 status = 1;
822 }
823 }
824 if (!status) {
825 if (origname)
826 strncpyz(name, origname, UHOSTLEN);
827 else
828 strcpy(name, "error");
829 }
830 debug3("|DNS| egg_dns_gotanswer: (hostbyip) ip: %s host: %s status: %d", origname, name, status);
831 call_hostbyip(origname, name, status);
832 } else
833 debug0("|DNS| egg_dns_gotanswer: got unknow type of answer ?!");
834 nfree(origname);
835 }
836
837 void egg_dns_checkall()
838 {
839 adns_query q, r;
840 adns_answer *answer;
841 char *origname;
842
843 adns_forallqueries_begin(ads);
844 while ((q = adns_forallqueries_next(ads, (void **)&r)) != NULL) {
845 switch (adns_check(ads, &q, &answer, (void **)&origname)) {
846 case 0: /* ok */
847 egg_dns_gotanswer(1, answer, origname);
848 break;
849 case EAGAIN: /* Go into the queue again */
850 break;
851 default: /* failed */
852 egg_dns_gotanswer(0, answer, origname);
853 break;
854 }
855 }
856 }
857
858 /* Attempts to read from all the sockets in socklist
859 * fills s with up to 511 bytes if available, and returns the array index
860 *
861 * on EOF: returns -1, with socket in len
862 * on socket error: returns -2
863 * if nothing is ready: returns -3
864 */
865 static int sockread(char *s, int *len)
866 {
867 fd_set fd, fdw, fde;
868 int fds, i, x;
869 struct timeval t, tnow;
870 struct timeval *pt = &t;
871 int grab = 511;
872
873 fds = getdtablesize();
874 #ifdef FD_SETSIZE
875 if (fds > FD_SETSIZE)
876 fds = FD_SETSIZE; /* Fixes YET ANOTHER freebsd bug!!! */
877 #endif
878 /* timeout: 1 sec */
879 t.tv_sec = 1;
880 t.tv_usec = 0;
881 FD_ZERO(&fd);
882
883 for (i = 0; i < MAXSOCKS; i++)
884 if (!(socklist[i].flags & (SOCK_UNUSED | SOCK_VIRTUAL))) {
885 if ((socklist[i].sock == STDOUT) && !backgrd)
886 FD_SET(STDIN, &fd);
887 else
888 FD_SET(socklist[i].sock, &fd);
889 }
890 tnow.tv_sec = time(NULL);
891 tnow.tv_usec = 0;
892 adns_beforeselect(ads, &fds, &fd, &fdw, &fde, &pt, 0, &tnow);
893 #ifdef HPUX_HACKS
894 #ifndef HPUX10_HACKS
895 x = select(fds, (int *) &fd, (int *) NULL, (int *) NULL, &t);
896 #else
897 x = select(fds, &fd, NULL, NULL, &t);
898 #endif
899 #else
900 x = select(fds, &fd, NULL, NULL, &t);
901 #endif
902 tnow.tv_sec = time(NULL);
903 tnow.tv_usec = 0;
904 adns_afterselect(ads, fds, &fd, &fdw, &fde, &tnow);
905
906 /* dns stuff */
907 egg_dns_checkall();
908
909 if (x > 0) {
910 /* Something happened */
911 for (i = 0; i < MAXSOCKS; i++) {
912 if ((!(socklist[i].flags & SOCK_UNUSED)) &&
913 ((FD_ISSET(socklist[i].sock, &fd)) ||
914 ((socklist[i].sock == STDOUT) && (!backgrd) &&
915 (FD_ISSET(STDIN, &fd))))) {
916 if (socklist[i].flags & (SOCK_LISTEN | SOCK_CONNECT)) {
917 /* Listening socket -- don't read, just return activity */
918 /* Same for connection attempt */
919 /* (for strong connections, require a read to succeed first) */
920 if (socklist[i].flags & SOCK_PROXYWAIT) { /* drummer */
921 /* Hang around to get the return code from proxy */
922 grab = 10;
923 } else if (!(socklist[i].flags & SOCK_STRONGCONN)) {
924 debug1("net: connect! sock %d", socklist[i].sock);
925 s[0] = 0;
926 *len = 0;
927 return i;
928 }
929 } else if (socklist[i].flags & SOCK_PASS) {
930 s[0] = 0;
931 *len = 0;
932 return i;
933 }
934 if ((socklist[i].sock == STDOUT) && !backgrd)
935 x = read(STDIN, s, grab);
936 else
937 x = read(socklist[i].sock, s, grab);
938 if (x <= 0) { /* eof */
939 if (errno == EAGAIN) {
940 s[0] = 0;
941 *len = 0;
942 return -3;
943 }
944 *len = socklist[i].sock;
945 socklist[i].flags &= ~SOCK_CONNECT;
946 debug1("net: eof!(read) socket %d", socklist[i].sock);
947 return -1;
948 }
949 s[x] = 0;
950 *len = x;
951 if (socklist[i].flags & SOCK_PROXYWAIT) {
952 debug2("net: socket: %d proxy errno: %d", socklist[i].sock, s[1]);
953 socklist[i].flags &= ~(SOCK_CONNECT | SOCK_PROXYWAIT);
954 switch (s[1]) {
955 case 90: /* Success */
956 s[0] = 0;
957 *len = 0;
958 return i;
959 case 91: /* Failed */
960 errno = ECONNREFUSED;
961 break;
962 case 92: /* No identd */
963 case 93: /* Identd said wrong username */
964 /* A better error message would be "socks misconfigured"
965 * or "identd not working" but this is simplest.
966 */
967 errno = ENETUNREACH;
968 break;
969 }
970 *len = socklist[i].sock;
971 return -1;
972 }
973 return i;
974 }
975 }
976 } else if (x == -1)
977 return -2; /* socket error */
978 else {
979 s[0] = 0;
980 *len = 0;
981 }
982 return -3;
983 }
984
985 /* sockgets: buffer and read from sockets
986 *
987 * Attempts to read from all registered sockets for up to one second. if
988 * after one second, no complete data has been received from any of the
989 * sockets, 's' will be empty, 'len' will be 0, and sockgets will return -3.
990 * if there is returnable data received from a socket, the data will be
991 * in 's' (null-terminated if non-binary), the length will be returned
992 * in len, and the socket number will be returned.
993 * normal sockets have their input buffered, and each call to sockgets
994 * will return one line terminated with a '\n'. binary sockets are not
995 * buffered and return whatever coems in as soon as it arrives.
996 * listening sockets will return an empty string when a connection comes in.
997 * connecting sockets will return an empty string on a successful connect,
998 * or EOF on a failed connect.
999 * if an EOF is detected from any of the sockets, that socket number will be
1000 * put in len, and -1 will be returned.
1001 * the maximum length of the string returned is 512 (including null)
1002 *
1003 * Returns -4 if we handled something that shouldn't be handled by the
1004 * dcc functions. Simply ignore it.
1005 */
1006
1007 int sockgets(char *s, int *len)
1008 {
1009 char xx[514], *p, *px;
1010 int ret, i, data = 0;
1011
1012 for (i = 0; i < MAXSOCKS; i++) {
1013 /* Check for stored-up data waiting to be processed */
1014 if (!(socklist[i].flags & SOCK_UNUSED) &&
1015 !(socklist[i].flags & SOCK_BUFFER) && (socklist[i].inbuf != NULL)) {
1016 if (!(socklist[i].flags & SOCK_BINARY)) {
1017 /* look for \r too cos windows can't follow RFCs */
1018 p = strchr(socklist[i].inbuf, '\n');
1019 if (p == NULL)
1020 p = strchr(socklist[i].inbuf, '\r');
1021 if (p != NULL) {
1022 *p = 0;
1023 if (strlen(socklist[i].inbuf) > 510)
1024 socklist[i].inbuf[510] = 0;
1025 strcpy(s, socklist[i].inbuf);
1026 px = (char *) nmalloc(strlen(p + 1) + 1);
1027 strcpy(px, p + 1);
1028 nfree(socklist[i].inbuf);
1029 if (px[0])
1030 socklist[i].inbuf = px;
1031 else {
1032 nfree(px);
1033 socklist[i].inbuf = NULL;
1034 }
1035 /* Strip CR if this was CR/LF combo */
1036 if (s[strlen(s) - 1] == '\r')
1037 s[strlen(s) - 1] = 0;
1038 *len = strlen(s);
1039 return socklist[i].sock;
1040 }
1041 } else {
1042 /* Handling buffered binary data (must have been SOCK_BUFFER before). */
1043 if (socklist[i].inbuflen <= 510) {
1044 *len = socklist[i].inbuflen;
1045 egg_memcpy(s, socklist[i].inbuf, socklist[i].inbuflen);
1046 nfree(socklist[i].inbuf);
1047 socklist[i].inbuf = NULL;
1048 socklist[i].inbuflen = 0;
1049 } else {
1050 /* Split up into chunks of 510 bytes. */
1051 *len = 510;
1052 egg_memcpy(s, socklist[i].inbuf, *len);
1053 egg_memcpy(socklist[i].inbuf, socklist[i].inbuf + *len, *len);
1054 socklist[i].inbuflen -= *len;
1055 socklist[i].inbuf = nrealloc(socklist[i].inbuf,
1056 socklist[i].inbuflen);
1057 }
1058 return socklist[i].sock;
1059 }
1060 }
1061 /* Also check any sockets that might have EOF'd during write */
1062 if (!(socklist[i].flags & SOCK_UNUSED)
1063 && (socklist[i].flags & SOCK_EOFD)) {
1064 s[0] = 0;
1065 *len = socklist[i].sock;
1066 return -1;
1067 }
1068 }
1069 /* No pent-up data of any worth -- down to business */
1070 *len = 0;
1071 ret = sockread(xx, len);
1072 if (ret < 0) {
1073 s[0] = 0;
1074 return ret;
1075 }
1076 /* Binary, listening and passed on sockets don't get buffered. */
1077 if (socklist[ret].flags & SOCK_CONNECT) {
1078 if (socklist[ret].flags & SOCK_STRONGCONN) {
1079 socklist[ret].flags &= ~SOCK_STRONGCONN;
1080 /* Buffer any data that came in, for future read. */
1081 socklist[ret].inbuflen = *len;
1082 socklist[ret].inbuf = (char *) nmalloc(*len + 1);
1083 /* It might be binary data. You never know. */
1084 egg_memcpy(socklist[ret].inbuf, xx, *len);
1085 socklist[ret].inbuf[*len] = 0;
1086 }
1087 socklist[ret].flags &= ~SOCK_CONNECT;
1088 s[0] = 0;
1089 return socklist[ret].sock;
1090 }
1091 if (socklist[ret].flags & SOCK_BINARY) {
1092 egg_memcpy(s, xx, *len);
1093 return socklist[ret].sock;
1094 }
1095 if ((socklist[ret].flags & SOCK_LISTEN) ||
1096 (socklist[ret].flags & SOCK_PASS))
1097 return socklist[ret].sock;
1098 if (socklist[ret].flags & SOCK_BUFFER) {
1099 socklist[ret].inbuf = (char *) nrealloc(socklist[ret].inbuf,
1100 socklist[ret].inbuflen + *len + 1);
1101 egg_memcpy(socklist[ret].inbuf + socklist[ret].inbuflen, xx, *len);
1102 socklist[ret].inbuflen += *len;
1103 /* We don't know whether it's binary data. Make sure normal strings
1104 will be handled properly later on too. */
1105 socklist[ret].inbuf[socklist[ret].inbuflen] = 0;
1106 return -4; /* Ignore this one. */
1107 }
1108 /* Might be necessary to prepend stored-up data! */
1109 if (socklist[ret].inbuf != NULL) {
1110 p = socklist[ret].inbuf;
1111 socklist[ret].inbuf = (char *) nmalloc(strlen(p) + strlen(xx) + 1);
1112 strcpy(socklist[ret].inbuf, p);
1113 strcat(socklist[ret].inbuf, xx);
1114 nfree(p);
1115 if (strlen(socklist[ret].inbuf) < 512) {
1116 strcpy(xx, socklist[ret].inbuf);
1117 nfree(socklist[ret].inbuf);
1118 socklist[ret].inbuf = NULL;
1119 socklist[ret].inbuflen = 0;
1120 } else {
1121 p = socklist[ret].inbuf;
1122 socklist[ret].inbuflen = strlen(p) - 510;
1123 socklist[ret].inbuf = (char *) nmalloc(socklist[ret].inbuflen + 1);
1124 strcpy(socklist[ret].inbuf, p + 510);
1125 *(p + 510) = 0;
1126 strcpy(xx, p);
1127 nfree(p);
1128 /* (leave the rest to be post-pended later) */
1129 }
1130 }
1131 /* Look for EOL marker; if it's there, i have something to show */
1132 p = strchr(xx, '\n');
1133 if (p == NULL)
1134 p = strchr(xx, '\r');
1135 if (p != NULL) {
1136 *p = 0;
1137 strcpy(s, xx);
1138 strcpy(xx, p + 1);
1139 if (s[strlen(s) - 1] == '\r')
1140 s[strlen(s) - 1] = 0;
1141 data = 1; /* DCC_CHAT may now need to process a
1142 blank line */
1143 /* NO! */
1144 /* if (!s[0]) strcpy(s," "); */
1145 } else {
1146 s[0] = 0;
1147 if (strlen(xx) >= 510) {
1148 /* String is too long, so just insert fake \n */
1149 strcpy(s, xx);
1150 xx[0] = 0;
1151 data = 1;
1152 }
1153 }
1154 *len = strlen(s);
1155 /* Anything left that needs to be saved? */
1156 if (!xx[0]) {
1157 if (data)
1158 return socklist[ret].sock;
1159 else
1160 return -3;
1161 }
1162 /* Prepend old data back */
1163 if (socklist[ret].inbuf != NULL) {
1164 p = socklist[ret].inbuf;
1165 socklist[ret].inbuflen = strlen(p) + strlen(xx);
1166 socklist[ret].inbuf = (char *) nmalloc(socklist[ret].inbuflen + 1);
1167 strcpy(socklist[ret].inbuf, xx);
1168 strcat(socklist[ret].inbuf, p);
1169 nfree(p);
1170 } else {
1171 socklist[ret].inbuflen = strlen(xx);
1172 socklist[ret].inbuf = (char *) nmalloc(socklist[ret].inbuflen + 1);
1173 strcpy(socklist[ret].inbuf, xx);
1174 }
1175 if (data) {
1176 return socklist[ret].sock;
1177 } else {
1178 return -3;
1179 }
1180 }
1181
1182 /* Dump something to a socket
1183 *
1184 * NOTE: Do NOT put Contexts in here if you want DEBUG to be meaningful!!
1185 */
1186 void tputs(register int z, char *s, unsigned int len)
1187 {
1188 register int i, x, idx;
1189 char *p;
1190 static int inhere = 0;
1191
1192 if (z < 0)
1193 return; /* um... HELLO?! sanity check please! */
1194 if (((z == STDOUT) || (z == STDERR)) && (!backgrd || use_stderr)) {
1195 write(z, s, len);
1196 return;
1197 }
1198 for (i = 0; i < MAXSOCKS; i++) {
1199 if (!(socklist[i].flags & SOCK_UNUSED) && (socklist[i].sock == z)) {
1200 for (idx = 0; idx < dcc_total; idx++) {
1201 if (dcc[idx].sock == z) {
1202 if (dcc[idx].type) {
1203 if (dcc[idx].type->name) {
1204 if (!strncmp(dcc[idx].type->name, "BOT", 3)) {
1205 otraffic_bn_today += len;
1206 break;
1207 } else if (!strcmp(dcc[idx].type->name, "SERVER")) {
1208 otraffic_irc_today += len;
1209 break;
1210 } else if (!strncmp(dcc[idx].type->name, "CHAT", 4)) {
1211 otraffic_dcc_today += len;
1212 break;
1213 } else if (!strncmp(dcc[idx].type->name, "FILES", 5)) {
1214 otraffic_filesys_today += len;
1215 break;
1216 } else if (!strcmp(dcc[idx].type->name, "SEND")) {
1217 otraffic_trans_today += len;
1218 break;
1219 } else if (!strncmp(dcc[idx].type->name, "GET", 3)) {
1220 otraffic_trans_today += len;
1221 break;
1222 } else {
1223 otraffic_unknown_today += len;
1224 break;
1225 }
1226 }
1227 }
1228 }
1229 }
1230
1231 if (socklist[i].outbuf != NULL) {
1232 /* Already queueing: just add it */
1233 p = (char *) nrealloc(socklist[i].outbuf, socklist[i].outbuflen + len);
1234 egg_memcpy(p + socklist[i].outbuflen, s, len);
1235 socklist[i].outbuf = p;
1236 socklist[i].outbuflen += len;
1237 return;
1238 }
1239 /* Try. */
1240 x = write(z, s, len);
1241 if (x == (-1))
1242 x = 0;
1243 if (x < len) {
1244 /* Socket is full, queue it */
1245 socklist[i].outbuf = (char *) nmalloc(len - x);
1246 egg_memcpy(socklist[i].outbuf, &s[x], len - x);
1247 socklist[i].outbuflen = len - x;
1248 }
1249 return;
1250 }
1251 }
1252 /* Make sure we don't cause a crash by looping here */
1253 if (!inhere) {
1254 inhere = 1;
1255
1256 putlog(LOG_MISC, "*", "!!! writing to nonexistent socket: %d", z);
1257 s[strlen(s) - 1] = 0;
1258 putlog(LOG_MISC, "*", "!-> '%s'", s);
1259
1260 inhere = 0;
1261 }
1262 }
1263
1264 /* tputs might queue data for sockets, let's dump as much of it as
1265 * possible.
1266 */
1267 void dequeue_sockets()
1268 {
1269 int i, x;
1270
1271 for (i = 0; i < MAXSOCKS; i++) {
1272 if (!(socklist[i].flags & SOCK_UNUSED) &&
1273 socklist[i].outbuf != NULL) {
1274 /* Trick tputs into doing the work */
1275 x = write(socklist[i].sock, socklist[i].outbuf,
1276 socklist[i].outbuflen);
1277 if ((x < 0) && (errno != EAGAIN)
1278 #ifdef EBADSLT
1279 && (errno != EBADSLT)
1280 #endif
1281 #ifdef ENOTCONN
1282 && (errno != ENOTCONN)
1283 #endif
1284 ) {
1285 /* This detects an EOF during writing */
1286 debug3("net: eof!(write) socket %d (%s,%d)", socklist[i].sock,
1287 strerror(errno), errno);
1288 socklist[i].flags |= SOCK_EOFD;
1289 } else if (x == socklist[i].outbuflen) {
1290 /* If the whole buffer was sent, nuke it */
1291 nfree(socklist[i].outbuf);
1292 socklist[i].outbuf = NULL;
1293 socklist[i].outbuflen = 0;
1294 } else if (x > 0) {
1295 char *p = socklist[i].outbuf;
1296
1297 /* This removes any sent bytes from the beginning of the buffer */
1298 socklist[i].outbuf = (char *) nmalloc(socklist[i].outbuflen - x);
1299 egg_memcpy(socklist[i].outbuf, p + x, socklist[i].outbuflen - x);
1300 socklist[i].outbuflen -= x;
1301 nfree(p);
1302 }
1303
1304 /* All queued data was sent. Call handler if one exists and the
1305 * dcc entry wants it.
1306 */
1307 if (!socklist[i].outbuf) {
1308 int idx = findanyidx(socklist[i].sock);
1309
1310 if (idx > 0 && dcc[idx].type && dcc[idx].type->outdone)
1311 dcc[idx].type->outdone(idx);
1312 }
1313 }
1314 }
1315 }
1316
1317
1318 /*
1319 * Debugging stuff
1320 */
1321
1322 void tell_netdebug(int idx)
1323 {
1324 int i;
1325 char s[80];
1326
1327 dprintf(idx, "Open sockets:");
1328 for (i = 0; i < MAXSOCKS; i++) {
1329 if (!(socklist[i].flags & SOCK_UNUSED)) {
1330 sprintf(s, " %d", socklist[i].sock);
1331 if (socklist[i].flags & SOCK_BINARY)
1332 strcat(s, " (binary)");
1333 if (socklist[i].flags & SOCK_LISTEN)
1334 strcat(s, " (listen)");
1335 if (socklist[i].flags & SOCK_PASS)
1336 strcat(s, " (passed on)");
1337 if (socklist[i].flags & SOCK_CONNECT)
1338 strcat(s, " (connecting)");
1339 if (socklist[i].flags & SOCK_STRONGCONN)
1340 strcat(s, " (strong)");
1341 if (socklist[i].flags & SOCK_NONSOCK)
1342 strcat(s, " (file)");
1343 if (socklist[i].inbuf != NULL)
1344 sprintf(&s[strlen(s)], " (inbuf: %04X)", strlen(socklist[i].inbuf));
1345 if (socklist[i].outbuf != NULL)
1346 sprintf(&s[strlen(s)], " (outbuf: %06lX)", socklist[i].outbuflen);
1347 strcat(s, ",");
1348 dprintf(idx, "%s", s);
1349 }
1350 }
1351 dprintf(idx, " done.\n");
1352 }
1353
1354 /* Checks wether the referenced socket has data queued.
1355 *
1356 * Returns true if the incoming/outgoing (depending on 'type') queues
1357 * contain data, otherwise false.
1358 */
1359 int sock_has_data(int type, int sock)
1360 {
1361 int ret = 0, i;
1362
1363 for (i = 0; i < MAXSOCKS; i++)
1364 if (!(socklist[i].flags & SOCK_UNUSED) && socklist[i].sock == sock)
1365 break;
1366 if (i < MAXSOCKS) {
1367 switch (type) {
1368 case SOCK_DATA_OUTGOING:
1369 ret = (socklist[i].outbuf != NULL);
1370 break;
1371 case SOCK_DATA_INCOMING:
1372 ret = (socklist[i].inbuf != NULL);
1373 break;
1374 }
1375 } else
1376 debug1("sock_has_data: could not find socket #%d, returning false.", sock);
1377 return ret;
1378 }
1379
1380 /* flush_inbuf():
1381 * checks if there's data in the incoming buffer of an connection
1382 * and flushs the buffer if possible
1383 *
1384 * returns: -1 if the dcc entry wasn't found
1385 * -2 if dcc[idx].type->activity doesn't exist and the data couldn't
1386 * be handled
1387 * 0 if buffer was empty
1388 * otherwise length of flushed buffer
1389 */
1390 int flush_inbuf(int idx)
1391 {
1392 int i, len;
1393 char *inbuf;
1394
1395 Assert((idx >= 0) && (idx < dcc_total));
1396 for (i = 0; i < MAXSOCKS; i++) {
1397 if ((dcc[idx].sock == socklist[i].sock)
1398 && !(socklist[i].flags & SOCK_UNUSED)) {
1399 len = socklist[i].inbuflen;
1400 if ((len > 0) && socklist[i].inbuf) {
1401 if (dcc[idx].type && dcc[idx].type->activity) {
1402 inbuf = socklist[i].inbuf;
1403 socklist[i].inbuf = NULL;
1404 dcc[idx].type->activity(idx, inbuf, len);
1405 nfree(inbuf);
1406 return len;
1407 } else
1408 return -2;
1409 } else
1410 return 0;
1411 }
1412 }
1413 return -1;
1414 }

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