fill ai_canonname field for numeric hostname, by the given hostname.

folows new recommendation in RFC3493.  markus ok

1 files changed, 26 insertions, 8 deletions

diff --git a/src/lib/libc/net/getaddrinfo.c b/src/lib/libc/net/getaddrinfo.c
index 490b9861ae..0d14de7499 100644
--- a/src/lib/libc/net/getaddrinfo.c
+++ b/src/lib/libc/net/getaddrinfo.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: getaddrinfo.c,v 1.46 2003/03/17 23:16:36 jason Exp $  */
+/*      $OpenBSD: getaddrinfo.c,v 1.47 2003/05/14 05:38:34 itojun Exp $ */
 /*      $KAME: getaddrinfo.c,v 1.31 2000/08/31 17:36:43 itojun Exp $    */
 
 /*
@@ -203,7 +203,7 @@ static int explore_fqdn(const struct addrinfo *, const char *,
 static int explore_null(const struct addrinfo *,
         const char *, struct addrinfo **);
 static int explore_numeric(const struct addrinfo *, const char *,
-        const char *, struct addrinfo **);
+        const char *, struct addrinfo **, const char *);
 static int explore_numeric_scope(const struct addrinfo *, const char *,
         const char *, struct addrinfo **);
 static int get_canonname(const struct addrinfo *,
@@ -418,7 +418,8 @@ getaddrinfo(hostname, servname, hints, res)
                 if (hostname == NULL)
                         error = explore_null(pai, servname, &cur->ai_next);
                 else
-                        error = explore_numeric_scope(pai, hostname, servname, &cur->ai_next);
+                        error = explore_numeric_scope(pai, hostname, servname,
+                            &cur->ai_next);
 
                 if (error)
                         goto free;
@@ -673,11 +674,12 @@ free:
  * numeric hostname
  */
 static int
-explore_numeric(pai, hostname, servname, res)
+explore_numeric(pai, hostname, servname, res, canonname)
         const struct addrinfo *pai;
         const char *hostname;
         const char *servname;
         struct addrinfo **res;
+        const char *canonname;
 {
         const struct afd *afd;
         struct addrinfo *cur;
@@ -707,6 +709,14 @@ explore_numeric(pai, hostname, servname, res)
                             pai->ai_family == PF_UNSPEC /*?*/) {
                                 GET_AI(cur->ai_next, afd, pton);
                                 GET_PORT(cur->ai_next, servname);
+                                if ((pai->ai_flags & AI_CANONNAME)) {
+                                        /*
+                                         * Set the numeric address itself as
+                                         * the canonical name, based on a
+                                         * clarification in rfc2553bis-03.
+                                         */
+                                        GET_CANONNAME(cur->ai_next, canonname);
+                                }
                                 while (cur && cur->ai_next)
                                         cur = cur->ai_next;
                         } else
@@ -720,6 +730,14 @@ explore_numeric(pai, hostname, servname, res)
                             pai->ai_family == PF_UNSPEC /*?*/) {
                                 GET_AI(cur->ai_next, afd, pton);
                                 GET_PORT(cur->ai_next, servname);
+                                if ((pai->ai_flags & AI_CANONNAME)) {
+                                        /*
+                                         * Set the numeric address itself as
+                                         * the canonical name, based on a
+                                         * clarification in rfc2553bis-03.
+                                         */
+                                        GET_CANONNAME(cur->ai_next, canonname);
+                                }
                                 while (cur && cur->ai_next)
                                         cur = cur->ai_next;
                         } else
@@ -749,7 +767,7 @@ explore_numeric_scope(pai, hostname, servname, res)
         struct addrinfo **res;
 {
 #if !defined(SCOPE_DELIMITER) || !defined(INET6)
-        return explore_numeric(pai, hostname, servname, res);
+        return explore_numeric(pai, hostname, servname, res, hostname);
 #else
         const struct afd *afd;
         struct addrinfo *cur;
@@ -768,11 +786,11 @@ explore_numeric_scope(pai, hostname, servname, res)
                 return 0;
 
         if (!afd->a_scoped)
-                return explore_numeric(pai, hostname, servname, res);
+                return explore_numeric(pai, hostname, servname, res, hostname);
 
         cp = strchr(hostname, SCOPE_DELIMITER);
         if (cp == NULL)
-                return explore_numeric(pai, hostname, servname, res);
+                return explore_numeric(pai, hostname, servname, res, hostname);
 
         /*
          * Handle special case of <scoped_address><delimiter><scope id>
@@ -785,7 +803,7 @@ explore_numeric_scope(pai, hostname, servname, res)
         addr = hostname2;
         scope = cp + 1;
 
-        error = explore_numeric(pai, addr, servname, res);
+        error = explore_numeric(pai, addr, servname, res, hostname);
         if (error == 0) {
                 u_int32_t scopeid;