X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git;a=blobdiff_plain;f=src%2Fsetup.c;h=e683347e4277ad0e746b2fa749b7ef8b9d1fe5f6;hp=44c3cee0ad1e9652563b2548046dd03b3d439b25;hb=9ee3a72c6fa372f5545e8d29af56553f33e70ab1;hpb=15480be436960212fd31b8963516766a68adcdd5

diff --git a/src/setup.c b/src/setup.c
index 44c3cee..e683347 100644
--- a/src/setup.c
+++ b/src/setup.c
@@ -41,24 +41,29 @@
 
 static void readconfig(adns_state ads, const char *filename, int warnmissing);
 
-static void addserver(adns_state ads, struct in_addr addr) {
+static void addserver(adns_state ads, const struct sockaddr *sa, int n) {
   int i;
-  struct server *ss;
+  adns_rr_addr *ss;
+  char buf[ADNS_ADDR2TEXT_BUFLEN];
   
   for (i=0; i<ads->nservers; i++) {
-    if (ads->servers[i].addr.s_addr == addr.s_addr) {
-      adns__debug(ads,-1,0,"duplicate nameserver %s ignored",inet_ntoa(addr));
+    if (adns__sockaddrs_equal(sa, &ads->servers[i].addr.sa)) {
+      adns__debug(ads,-1,0,"duplicate nameserver %s ignored",
+		  adns__sockaddr_ntoa(sa, buf));
       return;
     }
   }
   
   if (ads->nservers>=MAXSERVERS) {
-    adns__diag(ads,-1,0,"too many nameservers, ignoring %s",inet_ntoa(addr));
+    adns__diag(ads,-1,0,"too many nameservers, ignoring %s",
+	       adns__sockaddr_ntoa(sa, buf));
     return;
   }
 
   ss= ads->servers+ads->nservers;
-  ss->addr= addr;
+  assert(n <= sizeof(ss->addr));
+  ss->len = n;
+  memcpy(&ss->addr, sa, n);
   ads->nservers++;
 }
 
@@ -105,14 +110,26 @@ static int nextword(const char **bufp_io, const char **word_r, int *l_r) {
 
 static void ccf_nameserver(adns_state ads, const char *fn,
 			   int lno, const char *buf) {
-  struct in_addr ia;
-  
-  if (!inet_aton(buf,&ia)) {
+  adns_rr_addr a;
+  char addrbuf[ADNS_ADDR2TEXT_BUFLEN];
+  int err;
+
+  a.len= sizeof(a.addr);
+  err= adns_text2addr(buf,DNS_PORT, 0, &a.addr.sa,&a.len);
+  switch (err) {
+  case 0:
+    break;
+  case EINVAL:
     configparseerr(ads,fn,lno,"invalid nameserver address `%s'",buf);
     return;
+  default:
+    configparseerr(ads,fn,lno,"failed to parse nameserver address `%s': %s",
+		   buf,strerror(err));
+    return;
   }
-  adns__debug(ads,-1,0,"using nameserver %s",inet_ntoa(ia));
-  addserver(ads,ia);
+  adns__debug(ads,-1,0,"using nameserver %s",
+	      adns__sockaddr_ntoa(&a.addr.sa, addrbuf));
+  addserver(ads,&a.addr.sa,a.len);
 }
 
 static void ccf_search(adns_state ads, const char *fn,
@@ -148,13 +165,26 @@ static void ccf_search(adns_state ads, const char *fn,
   ads->searchlist= newptrs;
 }
 
+static int gen_pton(const char *text, int want_af, adns_sockaddr *a) {
+  int err;
+  int len;
+
+  len= sizeof(*a);
+  err= adns_text2addr(text,0, adns_qf_addrlit_scope_forbid,
+		      &a->sa, &len);
+  if (err) { assert(err == EINVAL); return 0; }
+  if (want_af != AF_UNSPEC && a->sa.sa_family != want_af) return 0;
+  return 1;
+}
+
 static void ccf_sortlist(adns_state ads, const char *fn,
 			 int lno, const char *buf) {
   const char *word;
   char tbuf[200], *slash, *ep;
-  struct in_addr base, mask;
+  const char *maskwhat;
+  struct sortlist *sl;
   int l;
-  unsigned long initial, baselocal;
+  int initial= -1;
 
   if (!buf) return;
   
@@ -174,49 +204,56 @@ static void ccf_sortlist(adns_state ads, const char *fn,
     memcpy(tbuf,word,l); tbuf[l]= 0;
     slash= strchr(tbuf,'/');
     if (slash) *slash++= 0;
-    
-    if (!inet_aton(tbuf,&base)) {
+
+    sl= &ads->sortlist[ads->nsortlist];
+    if (!gen_pton(tbuf, AF_UNSPEC, &sl->base)) {
       configparseerr(ads,fn,lno,"invalid address `%s' in sortlist",tbuf);
       continue;
     }
 
     if (slash) {
-      if (strchr(slash,'.')) {
-	if (!inet_aton(slash,&mask)) {
+      if (slash[strspn(slash, "0123456789")]) {
+	maskwhat = "mask";
+	if (!gen_pton(slash, sl->base.sa.sa_family, &sl->mask)) {
 	  configparseerr(ads,fn,lno,"invalid mask `%s' in sortlist",slash);
 	  continue;
 	}
-	if (base.s_addr & ~mask.s_addr) {
-	  configparseerr(ads,fn,lno, "mask `%s' in sortlist"
-			 " overlaps address `%s'",slash,tbuf);
-	  continue;
-	}
       } else {
+	maskwhat = "prefix length";
 	initial= strtoul(slash,&ep,10);
-	if (*ep || initial>32) {
+	if (*ep || initial>adns__addr_width(sl->base.sa.sa_family)) {
 	  configparseerr(ads,fn,lno,"mask length `%s' invalid",slash);
 	  continue;
 	}
-	mask.s_addr= htonl((0x0ffffffffUL) << (32-initial));
+	sl->mask.sa.sa_family= sl->base.sa.sa_family;
+	adns__prefix_mask(&sl->mask, initial);
       }
     } else {
-      baselocal= ntohl(base.s_addr);
-      if (!baselocal & 0x080000000UL) /* class A */
-	mask.s_addr= htonl(0x0ff000000UL);
-      else if ((baselocal & 0x0c0000000UL) == 0x080000000UL)
-	mask.s_addr= htonl(0x0ffff0000UL); /* class B */
-      else if ((baselocal & 0x0f0000000UL) == 0x0e0000000UL)
-	mask.s_addr= htonl(0x0ff000000UL); /* class C */
-      else {
+      maskwhat = "implied prefix length";
+      initial= adns__guess_prefix_length(&sl->base);
+      if (initial < 0) {
 	configparseerr(ads,fn,lno, "network address `%s'"
 		       " in sortlist is not in classed ranges,"
 		       " must specify mask explicitly", tbuf);
 	continue;
       }
+      sl->mask.sa.sa_family= sl->base.sa.sa_family;
+      adns__prefix_mask(&sl->mask, initial);
+    }
+
+    if (!adns__addr_matches(sl->base.sa.sa_family,
+			    adns__sockaddr_addr(&sl->base.sa),
+			    &sl->base,&sl->mask)) {
+      if (initial >= 0) {
+	configparseerr(ads,fn,lno, "%s %d in sortlist"
+		       " overlaps address `%s'",maskwhat,initial,tbuf);
+      } else {
+	configparseerr(ads,fn,lno, "%s `%s' in sortlist"
+		       " overlaps address `%s'",maskwhat,slash,tbuf);
+      }
+      continue;
     }
 
-    ads->sortlist[ads->nsortlist].base= base;
-    ads->sortlist[ads->nsortlist].mask= mask;
     ads->nsortlist++;
   }
 }
@@ -226,7 +263,7 @@ static void ccf_options(adns_state ads, const char *fn,
   const char *word;
   char *ep;
   unsigned long v;
-  int l;
+  int i,l;
 
   if (!buf) return;
 
@@ -260,6 +297,26 @@ static void ccf_options(adns_state ads, const char *fn,
       }
       continue;
     }
+    if (l>=8 && !memcmp(word,"adns_af:",8)) {
+      word += 8;
+      ads->iflags &= ~adns_if_afmask;
+      if (strcmp(word,"any")) for (;;) {
+	i= strcspn(word,",");
+	if (i>=4 && !memcmp(word,"ipv4",4))
+	  ads->iflags |= adns_if_permit_ipv4;
+	else if (i>=4 && !memcmp(word,"ipv6",4))
+	  ads->iflags |= adns_if_permit_ipv6;
+	else {
+	  configparseerr(ads,fn,lno, "option adns_af has bad value `%.*s' "
+			 "(must be `any' or list {`ipv4',`ipv6'},...)",
+			 i, word);
+	  break;
+	}
+	if (!word[i]) break;
+	word= word + i + 1;
+      }
+      continue;
+    }
     adns__diag(ads,-1,0,"%s:%d: unknown option `%.*s'", fn,lno, l,word);
   }
 }
@@ -522,7 +579,8 @@ static int init_begin(adns_state *ads_r, adns_initflags flags,
   LIST_INIT(ads->output);
   ads->forallnext= 0;
   ads->nextid= 0x311f;
-  ads->udpsocket= ads->tcpsocket= -1;
+  ads->nudp= 0;
+  ads->tcpsocket= -1;
   adns__vbuf_init(&ads->tcpsend);
   adns__vbuf_init(&ads->tcprecv);
   ads->tcprecv_skip= 0;
@@ -542,28 +600,41 @@ static int init_begin(adns_state *ads_r, adns_initflags flags,
 }
 
 static int init_finish(adns_state ads) {
-  struct in_addr ia;
+  struct sockaddr_in sin;
   struct protoent *proto;
+  struct udpsocket *udp;
+  int i, j;
   int r;
   
   if (!ads->nservers) {
     if (ads->logfn && ads->iflags & adns_if_debug)
-      adns__lprintf(ads,"adns: no nameservers, using localhost\n");
-    ia.s_addr= htonl(INADDR_LOOPBACK);
-    addserver(ads,ia);
+      adns__lprintf(ads,"adns: no nameservers, using IPv4 localhost\n");
+    memset(&sin, 0, sizeof(sin));
+    sin.sin_family = AF_INET;
+    sin.sin_port = htons(DNS_PORT);
+    sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+    addserver(ads,(struct sockaddr *)&sin, sizeof(sin));
   }
 
   proto= getprotobyname("udp"); if (!proto) { r= ENOPROTOOPT; goto x_free; }
-  ads->udpsocket= socket(AF_INET,SOCK_DGRAM,proto->p_proto);
-  if (ads->udpsocket<0) { r= errno; goto x_free; }
-
-  r= adns__setnonblock(ads,ads->udpsocket);
-  if (r) { r= errno; goto x_closeudp; }
+  ads->nudp= 0;
+  for (i=0; i<ads->nservers; i++) {
+    if (adns__udpsocket_by_af(ads, ads->servers[i].addr.sa.sa_family))
+      continue;
+    assert(ads->nudp < MAXUDP);
+    udp= &ads->udpsocket[ads->nudp];
+    udp->af= ads->servers[i].addr.sa.sa_family;
+    udp->fd= socket(udp->af,SOCK_DGRAM,proto->p_proto);
+    if (udp->fd < 0) { r= errno; goto x_free; }
+    r= adns__setnonblock(ads,udp->fd);
+    if (r) { r= errno; goto x_closeudp; }
+    ads->nudp++;
+  }
   
   return 0;
 
  x_closeudp:
-  close(ads->udpsocket);
+  for (j=0; j<ads->nudp; j++) close(ads->udpsocket[j].fd);
  x_free:
   free(ads);
   return r;
@@ -670,6 +741,7 @@ int adns_init_logfn(adns_state *newstate_r, adns_initflags flags,
 }
 
 void adns_finish(adns_state ads) {
+  int i;
   adns__consistency(ads,0,cc_entex);
   for (;;) {
     if (ads->udpw.head) adns_cancel(ads->udpw.head);
@@ -678,7 +750,7 @@ void adns_finish(adns_state ads) {
     else if (ads->output.head) adns_cancel(ads->output.head);
     else break;
   }
-  close(ads->udpsocket);
+  for (i=0; i<ads->nudp; i++) close(ads->udpsocket[i].fd);
   if (ads->tcpsocket >= 0) close(ads->tcpsocket);
   adns__vbuf_free(&ads->tcpsend);
   adns__vbuf_free(&ads->tcprecv);