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This patch from Bart Visscher <magick@linux-fan.com> adds

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IPV6 support to busybox.  This patch does the following:
    * Add IPv6 support to libbb
    * Enable IPv6 interface address display
    * Add IPv6 config option
    * Adds ping6, an adaptation of the ping applet for IPv6
    * Adds support routines for ping6:
	- xgethostbyname2
	- create_icmp6_socket
    * Adds ifconfig support for IPv6
    * Add support IPv6 to netstat
    * Add IPv6 support to route
Thanks Bart!
This commit is contained in:
Eric Andersen
2002-07-03 11:46:38 +00:00
parent 599e3ce163
commit 51b8bd68bb
15 changed files with 1225 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

243
networking/route.c
View File

@ -1,7 +1,7 @@
/* route
*
* Similar to the standard Unix route, but with only the necessary
* parts for AF_INET
* parts for AF_INET and AF_INET6
*
* Bjorn Wesen, Axis Communications AB
*
@ -15,16 +15,19 @@
* Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* $Id: route.c,v 1.16 2002/05/16 19:14:15 sandman Exp $
* $Id: route.c,v 1.17 2002/07/03 11:46:34 andersen Exp $
*
* displayroute() code added by Vladimir N. Oleynik <dzo@simtreas.ru>
* adjustments by Larry Doolittle <LRDoolittle@lbl.gov>
*
* IPV6 support added by Bart Visscher <magick@linux-fan.com>
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include "inet_common.h"
#include <net/route.h>
#include <net/if.h>
#include <linux/param.h> // HZ
#include <stdio.h>
#include <errno.h>
@ -325,6 +328,139 @@ INET_setroute(int action, int options, char **args)
return EXIT_SUCCESS;
}
#if CONFIG_FEATURE_IPV6
static int INET6_setroute(int action, int options, char **args)
{
struct in6_rtmsg rt;
struct ifreq ifr;
struct sockaddr_in6 sa6;
char target[128], gateway[128] = "NONE";
int metric, prefix_len;
char *devname = NULL;
char *cp;
int skfd;
if (*args == NULL)
show_usage();
strcpy(target, *args++);
if (!strcmp(target, "default")) {
prefix_len = 0;
memset(&sa6, 0, sizeof(sa6));
} else {
if ((cp = strchr(target, '/'))) {
prefix_len = atol(cp + 1);
if ((prefix_len < 0) || (prefix_len > 128))
show_usage();
*cp = 0;
} else {
prefix_len = 128;
}
if (INET6_resolve(target, (struct sockaddr_in6 *)&sa6) < 0) {
error_msg(_("can't resolve %s"), target);
return EXIT_FAILURE; /* XXX change to E_something */
}
}
/* Clean out the RTREQ structure. */
memset((char *) &rt, 0, sizeof(struct in6_rtmsg));
memcpy(&rt.rtmsg_dst, sa6.sin6_addr.s6_addr, sizeof(struct in6_addr));
/* Fill in the other fields. */
rt.rtmsg_flags = RTF_UP;
if (prefix_len == 128)
rt.rtmsg_flags |= RTF_HOST;
rt.rtmsg_metric = 1;
rt.rtmsg_dst_len = prefix_len;
while (*args) {
if (!strcmp(*args, "metric")) {
args++;
if (!*args || !isdigit(**args))
show_usage();
metric = atoi(*args);
rt.rtmsg_metric = metric;
args++;
continue;
}
if (!strcmp(*args, "gw") || !strcmp(*args, "gateway")) {
args++;
if (!*args)
show_usage();
if (rt.rtmsg_flags & RTF_GATEWAY)
show_usage();
strcpy(gateway, *args);
if (INET6_resolve(gateway, (struct sockaddr_in6 *)&sa6) < 0) {
error_msg(_("can't resolve gw %s"), gateway);
return (E_LOOKUP);
}
memcpy(&rt.rtmsg_gateway, sa6.sin6_addr.s6_addr,
sizeof(struct in6_addr));
rt.rtmsg_flags |= RTF_GATEWAY;
args++;
continue;
}
if (!strcmp(*args, "mod")) {
args++;
rt.rtmsg_flags |= RTF_MODIFIED;
continue;
}
if (!strcmp(*args, "dyn")) {
args++;
rt.rtmsg_flags |= RTF_DYNAMIC;
continue;
}
if (!strcmp(*args, "device") || !strcmp(*args, "dev")) {
args++;
if (!*args)
show_usage();
} else if (args[1])
show_usage();
devname = *args;
args++;
}
/* Create a socket to the INET6 kernel. */
if ((skfd = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
perror("socket");
return (E_SOCK);
}
if (devname) {
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, devname);
if (ioctl(skfd, SIOGIFINDEX, &ifr) < 0) {
perror("SIOGIFINDEX");
return (E_SOCK);
}
rt.rtmsg_ifindex = ifr.ifr_ifindex;
} else
rt.rtmsg_ifindex = 0;
/* Tell the kernel to accept this route. */
if (action == RTACTION_DEL) {
if (ioctl(skfd, SIOCDELRT, &rt) < 0) {
perror("SIOCDELRT");
close(skfd);
return (E_SOCK);
}
} else {
if (ioctl(skfd, SIOCADDRT, &rt) < 0) {
perror("SIOCADDRT");
close(skfd);
return (E_SOCK);
}
}
/* Close the socket. */
(void) close(skfd);
return (0);
}
#endif
#ifndef RTF_UP
/* Keep this in sync with /usr/src/linux/include/linux/route.h */
#define RTF_UP 0x0001 /* route usable */
@ -418,17 +554,103 @@ void displayroutes(int noresolve, int netstatfmt)
}
}
#if CONFIG_FEATURE_IPV6
static void INET6_displayroutes(int noresolve)
{
char buff[256];
char iface[16], flags[16];
char addr6[128], naddr6[128];
struct sockaddr_in6 saddr6, snaddr6;
int iflags, metric, refcnt, use, prefix_len, slen;
int numeric;
char addr6p[8][5], saddr6p[8][5], naddr6p[8][5];
FILE *fp = xfopen("/proc/net/ipv6_route", "r");
flags[0]='U';
if(noresolve)
noresolve = 0x0fff;
numeric = noresolve | 0x8000; /* default instead of * */
printf("Kernel IPv6 routing table\n"
"Destination "
"Next Hop "
"Flags Metric Ref Use Iface\n");
while( fgets(buff, sizeof(buff), fp) != NULL ) {
int ifl;
if(sscanf(buff, "%4s%4s%4s%4s%4s%4s%4s%4s %02x "
"%4s%4s%4s%4s%4s%4s%4s%4s %02x "
"%4s%4s%4s%4s%4s%4s%4s%4s %08x %08x %08x %08x %s\n",
addr6p[0], addr6p[1], addr6p[2], addr6p[3],
addr6p[4], addr6p[5], addr6p[6], addr6p[7],
&prefix_len,
saddr6p[0], saddr6p[1], saddr6p[2], saddr6p[3],
saddr6p[4], saddr6p[5], saddr6p[6], saddr6p[7],
&slen,
naddr6p[0], naddr6p[1], naddr6p[2], naddr6p[3],
naddr6p[4], naddr6p[5], naddr6p[6], naddr6p[7],
&metric, &use, &refcnt, &iflags, iface)!=31) {
error_msg_and_die( "Unsuported kernel route format\n");
}
ifl = 1; /* parse flags */
if (!(iflags & RTF_UP))
continue;
if (iflags & RTF_GATEWAY)
flags[ifl++]='G';
if (iflags & RTF_HOST)
flags[ifl++]='H';
if (iflags & RTF_DEFAULT)
flags[ifl++]='D';
if (iflags & RTF_ADDRCONF)
flags[ifl++]='A';
if (iflags & RTF_CACHE)
flags[ifl++]='C';
flags[ifl]=0;
/* Fetch and resolve the target address. */
snprintf(addr6, sizeof(addr6), "%s:%s:%s:%s:%s:%s:%s:%s",
addr6p[0], addr6p[1], addr6p[2], addr6p[3],
addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
inet_pton(AF_INET6, addr6, (struct sockaddr *) &saddr6.sin6_addr);
saddr6.sin6_family=AF_INET6;
INET6_rresolve(addr6, sizeof(addr6), (struct sockaddr_in6 *) &saddr6, numeric);
snprintf(addr6, sizeof(addr6), "%s/%d", addr6, prefix_len);
/* Fetch and resolve the nexthop address. */
snprintf(naddr6, sizeof(naddr6), "%s:%s:%s:%s:%s:%s:%s:%s",
naddr6p[0], naddr6p[1], naddr6p[2], naddr6p[3],
naddr6p[4], naddr6p[5], naddr6p[6], naddr6p[7]);
inet_pton(AF_INET6, naddr6, (struct sockaddr *) &snaddr6.sin6_addr);
snaddr6.sin6_family=AF_INET6;
INET6_rresolve(naddr6, sizeof(naddr6), (struct sockaddr_in6 *) &snaddr6, numeric);
/* Print the info. */
printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n",
addr6, naddr6, flags, metric, refcnt, use, iface);
}
}
#endif
int route_main(int argc, char **argv)
{
int opt;
int what = 0;
#if CONFIG_FEATURE_IPV6
int af=AF_INET;
#endif
if ( !argv [1] || ( argv [1][0] == '-' )) {
/* check options */
int noresolve = 0;
int extended = 0;
while ((opt = getopt(argc, argv, "ne")) > 0) {
while ((opt = getopt(argc, argv, "A:ne")) > 0) {
switch (opt) {
case 'n':
noresolve = 1;
@ -436,11 +658,22 @@ int route_main(int argc, char **argv)
case 'e':
extended = 1;
break;
case 'A':
#if CONFIG_FEATURE_IPV6
if (strcmp(optarg, "inet6")==0)
af=AF_INET6;
break;
#endif
default:
show_usage ( );
}
}
#if CONFIG_FEATURE_IPV6
if (af==AF_INET6)
INET6_displayroutes(*argv != NULL);
else
#endif
displayroutes ( noresolve, extended );
return EXIT_SUCCESS;
} else {
@ -455,5 +688,9 @@ int route_main(int argc, char **argv)
show_usage();
}
#if CONFIG_FEATURE_IPV6
if (af==AF_INET6)
return INET6_setroute(what, 0, argv+2);
#endif
return INET_setroute(what, 0, argv+2 );
}