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-rw-r--r--inet/getnameinfo.c107
-rw-r--r--inet/netinet/in.h3
2 files changed, 80 insertions, 30 deletions
diff --git a/inet/getnameinfo.c b/inet/getnameinfo.c
index 9a0709229e..6ee3d4d2cc 100644
--- a/inet/getnameinfo.c
+++ b/inet/getnameinfo.c
@@ -42,20 +42,21 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
/* This software is Copyright 1996 by Craig Metz, All Rights Reserved. */
-#include <sys/types.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
-#include <sys/un.h>
-#include <sys/utsname.h>
-#include <netdb.h>
+#include <alloca.h>
#include <errno.h>
-#include <string.h>
+#include <netdb.h>
#include <stdio.h>
+#include <string.h>
#include <unistd.h>
-#include <alloca.h>
-#include <bits/libc-lock.h>
#include <arpa/inet.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/un.h>
+#include <sys/utsname.h>
+#include <bits/libc-lock.h>
#ifndef min
# define min(x,y) (((x) > (y)) ? (y) : (x))
@@ -173,6 +174,7 @@ getnameinfo (const struct sockaddr *sa, socklen_t addrlen, char *host,
char *tmpbuf = alloca (tmpbuflen);
struct hostent th;
socklen_t min_addrlen = 0;
+ int ok = 0;
if (sa == NULL || addrlen < sizeof (sa_family_t))
return -1;
@@ -257,36 +259,83 @@ getnameinfo (const struct sockaddr *sa, socklen_t addrlen, char *host,
min(hostlen, (size_t) (c - h->h_name)));
host[min(hostlen - 1, (size_t) (c - h->h_name))]
= '\0';
- break;
+ ok = 1;
+ }
+ else
+ {
+ strncpy (host, h->h_name, hostlen);
+ ok = 1;
}
}
strncpy (host, h->h_name, hostlen);
- break;
+ ok = 1;
}
}
- if (flags & NI_NAMEREQD)
+ if (!ok)
{
- __set_errno (serrno);
- return -1;
- }
- else
- {
- const char *c;
- if (sa->sa_family == AF_INET6)
- c = inet_ntop (AF_INET6,
- (void *) &(((struct sockaddr_in6 *) sa)->sin6_addr),
- host, hostlen);
- else
- c = inet_ntop (AF_INET,
- (void *) &(((struct sockaddr_in *) sa)->sin_addr),
- host, hostlen);
-
- if (c == NULL)
+ if (flags & NI_NAMEREQD)
{
__set_errno (serrno);
return -1;
}
+ else
+ {
+ const char *c;
+ if (sa->sa_family == AF_INET6)
+ {
+ struct sockaddr_in6 *sin6p = (struct sockaddr_in6 *) sa;
+ uint32_t scopeid;
+
+ c = inet_ntop (AF_INET6,
+ (void *) &sin6p->sin6_addr, host, hostlen);
+ if (addrlen > sizeof (struct sockaddr_in6)
+ && (scopeid = sin6p->sin6_scope_id))
+ {
+ /* Buffer is >= IFNAMSIZ+1. */
+ char scopebuf[MAXHOSTNAMELEN + 1];
+ int ni_numericscope = 0;
+
+ if (IN6_IS_ADDR_LINKLOCAL (&sin6p->sin6_addr)
+ || IN6_IS_ADDR_MC_LINKLOCAL (&sin6p->sin6_addr))
+ {
+ if (if_indextoname (scopeid, scopebuf) == NULL)
+ ++ni_numericscope;
+ }
+ else
+ ++ni_numericscope;
+
+ if (ni_numericscope)
+ {
+ char *scopeptr = &scopebuf[1];
+ size_t real_hostlen;
+ size_t scopelen;
+
+ scopebuf[0] = SCOPE_DELIMITER;
+ scopelen = 1 + snprintf (scopeptr,
+ (scopebuf
+ + sizeof scopebuf
+ - scopeptr),
+ "%u", scopeid);
+
+ real_hostlen = __strnlen (host, hostlen);
+ if (real_hostlen + scopelen + 1 > hostlen)
+ return -1;
+ memcpy (host + real_hostlen, scopebuf, scopelen);
+ }
+ }
+ }
+ else
+ c = inet_ntop (AF_INET,
+ (void *) &(((struct sockaddr_in *) sa)->sin_addr),
+ host, hostlen);
+ if (c == NULL)
+ {
+ __set_errno (serrno);
+ return -1;
+ }
+ }
+ ok = 1;
}
break;
diff --git a/inet/netinet/in.h b/inet/netinet/in.h
index 13c2767d9a..fb668a204d 100644
--- a/inet/netinet/in.h
+++ b/inet/netinet/in.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991,92,93,94,95,96,97,98,99 Free Software Foundation, Inc.
+/* Copyright (C) 1991-1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -209,6 +209,7 @@ struct sockaddr_in6
uint16_t sin6_port; /* Transport layer port # */
uint32_t sin6_flowinfo; /* IPv6 flow information */
struct in6_addr sin6_addr; /* IPv6 address */
+ uint32_t sin6_scope_id; /* IPv6 scope-id */
};
/* IPv6 multicast request. */