X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git;a=blobdiff_plain;f=src%2Fgeneral.c;h=5ebdd6ad9c935dedac15285e0137dfdf4442f208;hp=211b6d20586a520aef2c672d4421912c17708d5c;hb=3ccea6ee865ecd08265da4b047bdf5ae45844e33;hpb=8837244370251f16e8f41097d4cbe5ef0058038c diff --git a/src/general.c b/src/general.c index 211b6d2..5ebdd6a 100644 --- a/src/general.c +++ b/src/general.c @@ -4,7 +4,12 @@ * - vbuf handling */ /* - * This file is part of adns, which is Copyright (C) 1997, 1998 Ian Jackson + * This file is + * Copyright (C) 1997-1999 Ian Jackson + * + * It is part of adns, which is + * Copyright (C) 1997-1999 Ian Jackson + * Copyright (C) 1999 Tony Finch * * 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 @@ -22,8 +27,10 @@ */ #include -#include +#include +#include +#include #include #include "internal.h" @@ -34,33 +41,36 @@ void adns__vdiag(adns_state ads, const char *pfx, adns_initflags prevent, int serv, adns_query qu, const char *fmt, va_list al) { const char *bef, *aft; vbuf vb; - if (!(ads->iflags & adns_if_debug) && (!prevent || (ads->iflags & prevent))) return; + + if (!ads->diagfile || + (!(ads->iflags & adns_if_debug) && (!prevent || (ads->iflags & prevent)))) + return; - fprintf(stderr,"adns%s: ",pfx); + fprintf(ads->diagfile,"adns%s: ",pfx); - vfprintf(stderr,fmt,al); + vfprintf(ads->diagfile,fmt,al); bef= " ("; aft= "\n"; if (qu && qu->query_dgram) { adns__vbuf_init(&vb); - fprintf(stderr,"%sQNAME=%s, QTYPE=%s", + fprintf(ads->diagfile,"%sQNAME=%s, QTYPE=%s", bef, adns__diag_domain(qu->ads,-1,0, &vb, qu->query_dgram,qu->query_dglen,DNS_HDRSIZE), qu->typei ? qu->typei->rrtname : ""); if (qu->typei && qu->typei->fmtname) - fprintf(stderr,"(%s)",qu->typei->fmtname); + fprintf(ads->diagfile,"(%s)",qu->typei->fmtname); bef=", "; aft=")\n"; } if (serv>=0) { - fprintf(stderr,"%sNS=%s",bef,inet_ntoa(ads->servers[serv].addr)); + fprintf(ads->diagfile,"%sNS=%s",bef,inet_ntoa(ads->servers[serv].addr)); bef=", "; aft=")\n"; } - fputs(aft,stderr); + fputs(aft,ads->diagfile); } void adns__debug(adns_state ads, int serv, adns_query qu, const char *fmt, ...) { @@ -144,7 +154,7 @@ const char *adns__diag_domain(adns_state ads, int serv, adns_query qu, adns_status st; st= adns__parse_domain(ads,serv,qu,vb, pdf_quoteok, dgram,dglen,&cbyte,dglen); - if (st == adns_s_nolocalmem) { + if (st == adns_s_nomemory) { return ""; } if (st) { @@ -172,7 +182,7 @@ adns_status adns_rr_info(adns_rrtype type, adns_status st; typei= adns__findtype(type); - if (!typei) return adns_s_notimplemented; + if (!typei) return adns_s_unknownrrtype; if (rrtname_r) *rrtname_r= typei->rrtname; if (fmtname_r) *fmtname_r= typei->fmtname; @@ -183,7 +193,7 @@ adns_status adns_rr_info(adns_rrtype type, adns__vbuf_init(&vb); st= typei->convstring(&vb,datap); if (st) goto x_freevb; - if (!adns__vbuf_append(&vb,"",1)) { st= adns_s_nolocalmem; goto x_freevb; } + if (!adns__vbuf_append(&vb,"",1)) { st= adns_s_nomemory; goto x_freevb; } assert(strlen(vb.buf) == vb.used-1); *data_r= realloc(vb.buf,vb.used); if (!*data_r) *data_r= vb.buf; @@ -194,31 +204,43 @@ adns_status adns_rr_info(adns_rrtype type, return st; } -#define SINFO(n,s) { adns_s_##n, s } +#define SINFO(n,s) { adns_s_##n, #n, s } static const struct sinfo { adns_status st; + const char *abbrev; const char *string; } sinfos[]= { - SINFO( ok, "OK" ), - SINFO( timeout, "Timed out" ), - SINFO( nolocalmem, "Out of memory" ), - SINFO( allservfail, "No working nameservers" ), - SINFO( servfail, "Nameserver failure" ), - SINFO( notimplemented, "Query not implemented" ), - SINFO( refused, "Refused by nameserver" ), - SINFO( reasonunknown, "Reason unknown" ), - SINFO( norecurse, "Recursion denied by nameserver" ), - SINFO( serverfaulty, "Nameserver sent bad data" ), - SINFO( unknownreply, "Reply from nameserver not understood" ), - SINFO( invaliddata, "Invalid data" ), - SINFO( inconsistent, "Inconsistent data" ), - SINFO( cname, "RR refers to an alias" ), - SINFO( invalidanswerdomain, "Received syntactically invalid domain" ), - SINFO( nxdomain, "No such domain" ), - SINFO( nodata, "No such data" ), - SINFO( invalidquerydomain, "Domain syntactically invalid" ), - SINFO( domaintoolong, "Domain name too long" ) + SINFO( ok, "OK" ), + + SINFO( nomemory, "Out of memory" ), + SINFO( unknownrrtype, "Query not implemented in DNS library" ), + SINFO( systemfail, "General resolver or system failure" ), + + SINFO( timeout, "DNS query timed out" ), + SINFO( allservfail, "All nameservers failed" ), + SINFO( norecurse, "Recursion denied by nameserver" ), + SINFO( invalidresponse, "Nameserver sent bad response" ), + SINFO( unknownformat, "Nameserver used unknown format" ), + + SINFO( rcodeservfail, "Nameserver reports failure" ), + SINFO( rcodeformaterror, "Query not understood by nameserver" ), + SINFO( rcodenotimplemented, "Query not implemented by nameserver" ), + SINFO( rcoderefused, "Query refused by nameserver" ), + SINFO( rcodeunknown, "Nameserver sent unknown response code" ), + + SINFO( inconsistent, "Inconsistent resource records in DNS" ), + SINFO( prohibitedcname, "DNS alias found where canonical name wanted" ), + SINFO( answerdomaininvalid, "Found syntactically invalid domain name" ), + SINFO( answerdomaintoolong, "Found overly-long domain name" ), + SINFO( invaliddata, "Found invalid DNS data" ), + + SINFO( querydomainwrong, "Domain invalid for particular DNS query type" ), + SINFO( querydomaininvalid, "Domain name is syntactically invalid" ), + SINFO( querydomaintoolong, "Domain name is too long" ), + + SINFO( nxdomain, "No such domain" ), + SINFO( nodata, "No such data" ), }; static int si_compar(const void *key, const void *elem) { @@ -228,26 +250,34 @@ static int si_compar(const void *key, const void *elem) { return *st < si->st ? -1 : *st > si->st ? 1 : 0; } +static const struct sinfo *findsinfo(adns_status st) { + return bsearch(&st,sinfos,sizeof(sinfos)/sizeof(*sinfos),sizeof(*sinfos),si_compar); +} + const char *adns_strerror(adns_status st) { - static char buf[100]; + const struct sinfo *si; + si= findsinfo(st); + return si->string; +} + +const char *adns_errabbrev(adns_status st) { const struct sinfo *si; - si= bsearch(&st,sinfos,sizeof(sinfos)/sizeof(*si),sizeof(*si),si_compar); - if (si) return si->string; - - snprintf(buf,sizeof(buf),"code %d",st); - return buf; + si= findsinfo(st); + return si->abbrev; } void adns__isort(void *array, int nobjs, int sz, void *tempbuf, - int (*needswap)(const void *a, const void *b)) { + int (*needswap)(void *context, const void *a, const void *b), + void *context) { byte *data= array; int i, place; for (i=0; i0 && needswap(data + (place-1)*sz, data + i*sz); place--); - + for (place= i; + place>0 && needswap(context, data + (place-1)*sz, data + i*sz); + place--); if (place != i) { memcpy(tempbuf, data + i*sz, sz); memmove(data + (place+1)*sz, data + place*sz, (i-place)*sz); @@ -255,3 +285,32 @@ void adns__isort(void *array, int nobjs, int sz, void *tempbuf, } } } + +/* SIGPIPE protection. */ + +void adns__sigpipe_protect(adns_state ads) { + sigset_t toblock; + struct sigaction sa; + int r; + + if (ads->iflags & adns_if_nosigpipe) return; + + sigfillset(&toblock); + sigdelset(&toblock,SIGPIPE); + + sa.sa_handler= SIG_IGN; + sigfillset(&sa.sa_mask); + sa.sa_flags= 0; + + r= sigprocmask(SIG_SETMASK,&toblock,&ads->stdsigmask); assert(!r); + r= sigaction(SIGPIPE,&sa,&ads->stdsigpipe); assert(!r); +} + +void adns__sigpipe_unprotect(adns_state ads) { + int r; + + if (ads->iflags & adns_if_nosigpipe) return; + + r= sigaction(SIGPIPE,&ads->stdsigpipe,0); assert(!r); + r= sigprocmask(SIG_SETMASK,&ads->stdsigmask,0); assert(!r); +}