[src/trunk]: src/usr.sbin/rpc.bootparamd declare new function for getting my ...

[itojun <itojun%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/13cb48a3fc29
branches:  trunk
changeset: 484886:13cb48a3fc29
user:      itojun <itojun%NetBSD.org@localhost>
date:      Fri Apr 14 12:14:40 2000 +0000

description:
declare new function for getting my IPv4 address.
get_myaddress() is not usable any more for security reasons.
the change addresses PR8119.

diffstat:

 usr.sbin/rpc.bootparamd/bootparamd.c |  49 +++++++++++++++++++++++++++++++++--
 1 files changed, 46 insertions(+), 3 deletions(-)

diffs (88 lines):

diff -r 3de19ddda619 -r 13cb48a3fc29 usr.sbin/rpc.bootparamd/bootparamd.c
--- a/usr.sbin/rpc.bootparamd/bootparamd.c      Fri Apr 14 10:22:06 2000 +0000
+++ b/usr.sbin/rpc.bootparamd/bootparamd.c      Fri Apr 14 12:14:40 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bootparamd.c,v 1.21 1999/08/23 01:09:42 christos Exp $ */
+/*     $NetBSD: bootparamd.c,v 1.22 2000/04/14 12:14:40 itojun Exp $   */
 
 /*
  * This code is not copyright, and is placed in the public domain.
@@ -11,7 +11,7 @@
 
 #include <sys/cdefs.h>
 #ifndef lint
-__RCSID("$NetBSD: bootparamd.c,v 1.21 1999/08/23 01:09:42 christos Exp $");
+__RCSID("$NetBSD: bootparamd.c,v 1.22 2000/04/14 12:14:40 itojun Exp $");
 #endif
 
 #include <sys/types.h>
@@ -29,6 +29,7 @@
 #include <syslog.h>
 #include <unistd.h>
 #include <util.h>
+#include <ifaddrs.h>
 
 #include <netinet/in.h>
 #include <arpa/inet.h>
@@ -60,6 +61,7 @@
 int    main __P((int, char *[]));
 int    lookup_bootparam __P((char *, char *, char *, char **, char **));
 void   usage __P((void));
+static int get_localaddr __P((const char *, struct sockaddr_in *));
 
 
 /*
@@ -112,7 +114,8 @@
                err(1, "%s", bootpfile);
 
        if (route_addr.s_addr == 0) {
-               get_myaddress(&my_addr);
+               if (get_localaddr(NULL, &my_addr) != 0)
+                       errx(1, "router address not found");
                route_addr.s_addr = my_addr.sin_addr.s_addr;
        }
        if (!debug) {
@@ -405,3 +408,43 @@
            "usage: %s [-d] [-s] [-r router] [-f bootparmsfile]\n", __progname);
        exit(1);
 }
+
+static int
+get_localaddr(ifname, sin)
+       const char *ifname;
+       struct sockaddr_in *sin;
+{
+       struct ifaddrs *ifap, *ifa;
+
+       if (getifaddrs(&ifap) != 0)
+               return -1;
+
+       for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
+               if (ifname && strcmp(ifname, ifa->ifa_name) != 0)
+                       continue;
+               if (ifa->ifa_addr->sa_family != AF_INET)
+                       continue;
+               if (ifa->ifa_addr->sa_len != sizeof(*sin))
+                       continue;
+
+               /* no loopback please */
+#ifdef IFF_LOOPBACK
+               if (ifa->ifa_flags & IFF_LOOPBACK)
+                       continue;
+#else
+               if (strncmp(ifa->ifa_name, "lo", 2) == 0)
+                       continue;
+#endif
+
+               /* XXX more sanity checks? */
+
+               /* candidate found */
+               memcpy(sin, ifa->ifa_addr, ifa->ifa_addr->sa_len);
+               freeifaddrs(ifap);
+               return 0;
+       }
+
+       /* no candidate */
+       freeifaddrs(ifap);
+       return -1;
+}