diff options
Diffstat (limited to 'src/irc_res.c')
| -rw-r--r-- | src/irc_res.c | 84 |
1 files changed, 55 insertions, 29 deletions
diff --git a/src/irc_res.c b/src/irc_res.c index c7577c3..241cba4 100644 --- a/src/irc_res.c +++ b/src/irc_res.c @@ -1,4 +1,30 @@ /* + * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) + * + * Copyright (c) 1997-2014 ircd-hybrid development team + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + * USA + */ + +/*! \file irc_res.c + * \brief ircd resolver functions + * \version $Id$ + */ + +/* * A rewrite of Darren Reeds original res.c As there is nothing * left of Darrens original code, this is now licensed by the hybrid group. * (Well, some of the function names are the same, and bits of the structs..) @@ -14,7 +40,7 @@ * --Bleep (Thomas Helvey <tomh@inxpress.net>) * * This was all needlessly complicated for irc. Simplified. No more hostent - * All we really care about is the IP -> hostname mappings. Thats all. + * All we really care about is the IP -> hostname mappings. Thats all. * * Apr 28, 2003 --cryogen and Dianora */ @@ -38,7 +64,7 @@ #include "irc_reslib.h" #if (CHAR_BIT != 8) -#error this code needs to be able to address individual octets +#error this code needs to be able to address individual octets #endif static PF res_readreply; @@ -58,7 +84,7 @@ static PF res_readreply; #define RDLENGTH_SIZE (size_t)2 #define ANSWER_FIXED_SIZE (TYPE_SIZE + CLASS_SIZE + TTL_SIZE + RDLENGTH_SIZE) -typedef enum +typedef enum { REQ_IDLE, /* We're doing not much at all */ REQ_PTR, /* Looking up a PTR */ @@ -69,7 +95,7 @@ typedef enum REQ_CNAME /* We got a CNAME in response, we better get a real answer next */ } request_state; -struct reslist +struct reslist { dlink_node node; int id; @@ -118,14 +144,14 @@ static struct reslist *find_id(int); * revised for ircd, cryogen(stu) may03 */ static int -res_ourserver(const struct irc_ssaddr *inp) +res_ourserver(const struct irc_ssaddr *inp) { #ifdef IPV6 const struct sockaddr_in6 *v6; const struct sockaddr_in6 *v6in = (const struct sockaddr_in6 *)inp; #endif const struct sockaddr_in *v4; - const struct sockaddr_in *v4in = (const struct sockaddr_in *)inp; + const struct sockaddr_in *v4in = (const struct sockaddr_in *)inp; int ns; for (ns = 0; ns < irc_nscount; ++ns) @@ -166,7 +192,7 @@ res_ourserver(const struct irc_ssaddr *inp) } /* - * timeout_query_list - Remove queries from the list which have been + * timeout_query_list - Remove queries from the list which have been * there too long without being resolved. */ static time_t @@ -260,8 +286,8 @@ restart_resolver(void) } /* - * rem_request - remove a request from the list. - * This must also free any memory that has been allocated for + * rem_request - remove a request from the list. + * This must also free any memory that has been allocated for * temporary storage of DNS results. */ static void @@ -295,7 +321,7 @@ make_request(dns_callback_fnc callback, void *ctx) } /* - * delete_resolver_queries - cleanup outstanding queries + * delete_resolver_queries - cleanup outstanding queries * for which there no longer exist clients or conf lines. */ void @@ -316,7 +342,7 @@ delete_resolver_queries(const void *vptr) * send_res_msg - sends msg to all nameservers found in the "_res" structure. * This should reflect /etc/resolv.conf. We will get responses * which arent needed but is easier than checking to see if nameserver - * isnt present. Returns number of messages successfully sent to + * isnt present. Returns number of messages successfully sent to * nameservers or -1 if no successful sends. */ static int @@ -334,9 +360,9 @@ send_res_msg(const char *msg, int len, int rcount) for (i = 0; i < max_queries; i++) { - if (sendto(ResolverFileDescriptor.fd, msg, len, 0, - (struct sockaddr*)&(irc_nsaddr_list[i]), - irc_nsaddr_list[i].ss_len) == len) + if (sendto(ResolverFileDescriptor.fd, msg, len, 0, + (struct sockaddr*)&(irc_nsaddr_list[i]), + irc_nsaddr_list[i].ss_len) == len) ++sent; } @@ -362,7 +388,7 @@ find_id(int id) return NULL; } -/* +/* * gethost_byname_type - get host address from name * */ @@ -494,7 +520,7 @@ query_name(const char *name, int query_class, int type, memset(buf, 0, sizeof(buf)); - if ((request_len = irc_res_mkquery(name, query_class, type, + if ((request_len = irc_res_mkquery(name, query_class, type, (unsigned char *)buf, sizeof(buf))) > 0) { HEADER *header = (HEADER *)buf; @@ -603,8 +629,8 @@ proc_answer(struct reslist *request, HEADER *header, char *buf, char *eob) rd_length = irc_ns_get16(current); current += RDLENGTH_SIZE; - /* - * Wait to set request->type until we verify this structure + /* + * Wait to set request->type until we verify this structure */ switch (type) { @@ -651,9 +677,9 @@ proc_answer(struct reslist *request, HEADER *header, char *buf, char *eob) strlcpy(request->name, hostbuf, HOSTLEN + 1); return 1; break; - case T_CNAME: /* first check we already havent started looking + case T_CNAME: /* first check we already havent started looking into a cname */ - if (request->type != T_PTR) + if (request->type != T_PTR) return 0; if (request->state == REQ_CNAME) @@ -669,7 +695,7 @@ proc_answer(struct reslist *request, HEADER *header, char *buf, char *eob) request->state = REQ_CNAME; current += rd_length; break; - + default: /* XXX I'd rather just throw away the entire bogus thing * but its possible its just a broken nameserver with still @@ -690,13 +716,13 @@ static void res_readreply(fde_t *fd, void *data) { char buf[sizeof(HEADER) + MAXPACKET] - /* Sparc and alpha need 16bit-alignment for accessing header->id - * (which is uint16_t). Because of the header = (HEADER*) buf; + /* Sparc and alpha need 16bit-alignment for accessing header->id + * (which is uint16_t). Because of the header = (HEADER*) buf; * lateron, this is neeeded. --FaUl */ -#if defined(__sparc__) || defined(__alpha__) +#if defined(__sparc__) || defined(__alpha__) __attribute__((aligned (16))) -#endif +#endif ; HEADER *header; struct reslist *request = NULL; @@ -751,7 +777,7 @@ res_readreply(fde_t *fd, void *data) #ifdef IPV6 else { - /* + /* * If we havent already tried this, and we're looking up AAAA, try A * now */ @@ -767,7 +793,7 @@ res_readreply(fde_t *fd, void *data) } /* - * If this fails there was an error decoding the received packet, + * If this fails there was an error decoding the received packet, * try it again and hope it works the next time. */ if (proc_answer(request, header, buf, buf + rc)) @@ -787,7 +813,7 @@ res_readreply(fde_t *fd, void *data) /* * Lookup the 'authoritative' name that we were given for the - * ip#. + * ip#. * */ #ifdef IPV6 @@ -831,6 +857,6 @@ report_dns_servers(struct Client *source_p) irc_nsaddr_list[i].ss_len, ipaddr, sizeof(ipaddr), NULL, 0, NI_NUMERICHOST); sendto_one(source_p, form_str(RPL_STATSALINE), - me.name, source_p->name, ipaddr); + me.name, source_p->name, ipaddr); } } |