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-rw-r--r--common/srv.c333
1 files changed, 0 insertions, 333 deletions
diff --git a/common/srv.c b/common/srv.c
deleted file mode 100644
index 2107aa528..000000000
--- a/common/srv.c
+++ /dev/null
@@ -1,333 +0,0 @@
-/* srv.c - DNS SRV code
- * Copyright (C) 2003, 2009 Free Software Foundation, Inc.
- *
- * This file is part of GnuPG.
- *
- * This file is free software; you can redistribute it and/or modify
- * it under the terms of either
- *
- * - the GNU Lesser General Public License as published by the Free
- * Software Foundation; either version 3 of the License, or (at
- * your option) any later version.
- *
- * or
- *
- * - 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.
- *
- * or both in parallel, as here.
- *
- * This file 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, see <http://www.gnu.org/licenses/>.
- */
-
-#include <config.h>
-#include <sys/types.h>
-#ifdef _WIN32
-# ifdef HAVE_WINSOCK2_H
-# include <winsock2.h>
-# endif
-# include <windows.h>
-#else
-#include <netinet/in.h>
-#include <arpa/nameser.h>
-#include <resolv.h>
-#endif
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-#ifdef USE_ADNS
-# include <adns.h>
-#endif
-
-#include "util.h"
-#include "host2net.h"
-#include "srv.h"
-
-/* Not every installation has gotten around to supporting SRVs
- yet... */
-#ifndef T_SRV
-#define T_SRV 33
-#endif
-
-static int
-priosort(const void *a,const void *b)
-{
- const struct srventry *sa=a,*sb=b;
- if(sa->priority>sb->priority)
- return 1;
- else if(sa->priority<sb->priority)
- return -1;
- else
- return 0;
-}
-
-
-int
-getsrv (const char *name,struct srventry **list)
-{
- int srvcount=0;
- u16 count;
- int i, rc;
-
- *list = NULL;
-
-#ifdef USE_ADNS
- {
- adns_state state;
- adns_answer *answer = NULL;
-
- rc = adns_init (&state, adns_if_noerrprint, NULL);
- if (rc)
- {
- log_error ("error initializing adns: %s\n", strerror (errno));
- return -1;
- }
-
- rc = adns_synchronous (state, name, adns_r_srv, adns_qf_quoteok_query,
- &answer);
- if (rc)
- {
- log_error ("DNS query failed: %s\n", strerror (errno));
- adns_finish (state);
- return -1;
- }
- if (answer->status != adns_s_ok
- || answer->type != adns_r_srv || !answer->nrrs)
- {
- log_error ("DNS query returned an error or no records: %s (%s)\n",
- adns_strerror (answer->status),
- adns_errabbrev (answer->status));
- adns_free (answer);
- adns_finish (state);
- return 0;
- }
-
- for (count = 0; count < answer->nrrs; count++)
- {
- struct srventry *srv = NULL;
- struct srventry *newlist;
-
- if (strlen (answer->rrs.srvha[count].ha.host) >= MAXDNAME)
- {
- log_info ("hostname in SRV record too long - skipped\n");
- continue;
- }
-
- newlist = xtryrealloc (*list, (srvcount+1)*sizeof(struct srventry));
- if (!newlist)
- goto fail;
- *list = newlist;
- memset (&(*list)[srvcount], 0, sizeof(struct srventry));
- srv = &(*list)[srvcount];
- srvcount++;
-
- srv->priority = answer->rrs.srvha[count].priority;
- srv->weight = answer->rrs.srvha[count].weight;
- srv->port = answer->rrs.srvha[count].port;
- strcpy (srv->target, answer->rrs.srvha[count].ha.host);
- }
-
- adns_free (answer);
- adns_finish (state);
- }
-#else /*!USE_ADNS*/
- {
- unsigned char answer[2048];
- HEADER *header = (HEADER *)answer;
- unsigned char *pt, *emsg;
- int r;
- u16 dlen;
-
- r = res_query (name, C_IN, T_SRV, answer, sizeof answer);
- if (r < sizeof (HEADER) || r > sizeof answer)
- return -1;
- if (header->rcode != NOERROR || !(count=ntohs (header->ancount)))
- return 0; /* Error or no record found. */
-
- emsg = &answer[r];
- pt = &answer[sizeof(HEADER)];
-
- /* Skip over the query */
- rc = dn_skipname (pt, emsg);
- if (rc == -1)
- goto fail;
-
- pt += rc + QFIXEDSZ;
-
- while (count-- > 0 && pt < emsg)
- {
- struct srventry *srv=NULL;
- u16 type,class;
- struct srventry *newlist;
-
- newlist = xtryrealloc (*list, (srvcount+1)*sizeof(struct srventry));
- if (!newlist)
- goto fail;
- *list = newlist;
- memset(&(*list)[srvcount],0,sizeof(struct srventry));
- srv=&(*list)[srvcount];
- srvcount++;
-
- rc = dn_skipname(pt,emsg); /* the name we just queried for */
- if (rc == -1)
- goto fail;
- pt+=rc;
-
- /* Truncated message? */
- if((emsg-pt)<16)
- goto fail;
-
- type = buf16_to_u16 (pt);
- pt += 2;
- /* We asked for SRV and got something else !? */
- if(type!=T_SRV)
- goto fail;
-
- class = buf16_to_u16 (pt);
- pt += 2;
- /* We asked for IN and got something else !? */
- if(class!=C_IN)
- goto fail;
-
- pt += 4; /* ttl */
- dlen = buf16_to_u16 (pt);
- pt += 2;
-
- srv->priority = buf16_to_ushort (pt);
- pt += 2;
- srv->weight = buf16_to_ushort (pt);
- pt += 2;
- srv->port = buf16_to_ushort (pt);
- pt += 2;
-
- /* Get the name. 2782 doesn't allow name compression, but
- dn_expand still works to pull the name out of the
- packet. */
- rc = dn_expand(answer,emsg,pt,srv->target,MAXDNAME);
- if (rc == 1 && srv->target[0] == 0) /* "." */
- {
- xfree(*list);
- *list = NULL;
- return 0;
- }
- if (rc == -1)
- goto fail;
- pt += rc;
- /* Corrupt packet? */
- if (dlen != rc+6)
- goto fail;
- }
- }
-#endif /*!USE_ADNS*/
-
- /* Now we have an array of all the srv records. */
-
- /* Order by priority */
- qsort(*list,srvcount,sizeof(struct srventry),priosort);
-
- /* For each priority, move the zero-weighted items first. */
- for (i=0; i < srvcount; i++)
- {
- int j;
-
- for (j=i;j < srvcount && (*list)[i].priority == (*list)[j].priority; j++)
- {
- if((*list)[j].weight==0)
- {
- /* Swap j with i */
- if(j!=i)
- {
- struct srventry temp;
-
- memcpy (&temp,&(*list)[j],sizeof(struct srventry));
- memcpy (&(*list)[j],&(*list)[i],sizeof(struct srventry));
- memcpy (&(*list)[i],&temp,sizeof(struct srventry));
- }
-
- break;
- }
- }
- }
-
- /* Run the RFC-2782 weighting algorithm. We don't need very high
- quality randomness for this, so regular libc srand/rand is
- sufficient. Fixme: It is a bit questionaly to reinitalize srand
- - better use a gnupg fucntion for this. */
- srand(time(NULL)*getpid());
-
- for (i=0; i < srvcount; i++)
- {
- int j;
- float prio_count=0,chose;
-
- for (j=i; j < srvcount && (*list)[i].priority == (*list)[j].priority; j++)
- {
- prio_count+=(*list)[j].weight;
- (*list)[j].run_count=prio_count;
- }
-
- chose=prio_count*rand()/RAND_MAX;
-
- for (j=i;j<srvcount && (*list)[i].priority==(*list)[j].priority;j++)
- {
- if (chose<=(*list)[j].run_count)
- {
- /* Swap j with i */
- if(j!=i)
- {
- struct srventry temp;
-
- memcpy(&temp,&(*list)[j],sizeof(struct srventry));
- memcpy(&(*list)[j],&(*list)[i],sizeof(struct srventry));
- memcpy(&(*list)[i],&temp,sizeof(struct srventry));
- }
- break;
- }
- }
- }
-
- return srvcount;
-
- fail:
- xfree(*list);
- *list=NULL;
- return -1;
-}
-
-#ifdef TEST
-int
-main(int argc,char *argv[])
-{
- struct srventry *srv;
- int rc,i;
-
- rc=getsrv("_hkp._tcp.wwwkeys.pgp.net",&srv);
- printf("Count=%d\n\n",rc);
- for(i=0;i<rc;i++)
- {
- printf("priority=%hu\n",srv[i].priority);
- printf("weight=%hu\n",srv[i].weight);
- printf("port=%hu\n",srv[i].port);
- printf("target=%s\n",srv[i].target);
- printf("\n");
- }
-
- xfree(srv);
-
- return 0;
-}
-#endif /* TEST */
-
-/*
-Local Variables:
-compile-command: "cc -DTEST -I.. -I../include -Wall -g -o srv srv.c -lresolv ../tools/no-libgcrypt.o ../common/libcommon.a"
-End:
-*/
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-29 14:33:32 +0000