+/* vi: set sw=4 ts=4: */
/*
* iptunnel.c "ip tunnel"
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*
* Phil Karn <karn@ka9q.ampr.org> 990408: "pmtudisc" flag
*/
+#include "libbb.h"
#include <sys/socket.h>
#include <sys/ioctl.h>
-#include <stdlib.h>
#include <string.h>
#include <unistd.h>
-#include <arpa/inet.h>
#include <netinet/ip.h>
-#include <netinet/in.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <asm/types.h>
+#ifndef __constant_htons
#define __constant_htons htons
+#endif
#include <linux/if_tunnel.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
-#include "libbb.h"
static int do_ioctl_get_ifindex(char *dev)
{
struct ifreq ifr;
int fd;
- strcpy(ifr.ifr_name, dev);
- fd = socket(AF_INET, SOCK_DGRAM, 0);
+ strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
+ fd = xsocket(AF_INET, SOCK_DGRAM, 0);
if (ioctl(fd, SIOCGIFINDEX, &ifr)) {
bb_perror_msg("ioctl");
return 0;
struct ifreq ifr;
int fd;
- strcpy(ifr.ifr_name, dev);
- fd = socket(AF_INET, SOCK_DGRAM, 0);
+ strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
+ fd = xsocket(AF_INET, SOCK_DGRAM, 0);
if (ioctl(fd, SIOCGIFHWADDR, &ifr)) {
bb_perror_msg("ioctl");
return -1;
int fd;
ifr.ifr_ifindex = idx;
- fd = socket(AF_INET, SOCK_DGRAM, 0);
+ fd = xsocket(AF_INET, SOCK_DGRAM, 0);
if (ioctl(fd, SIOCGIFNAME, &ifr)) {
bb_perror_msg("ioctl");
return NULL;
int fd;
int err;
- strcpy(ifr.ifr_name, basedev);
+ strncpy(ifr.ifr_name, basedev, sizeof(ifr.ifr_name));
ifr.ifr_ifru.ifru_data = (void*)p;
- fd = socket(AF_INET, SOCK_DGRAM, 0);
+ fd = xsocket(AF_INET, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCGETTUNNEL, &ifr);
if (err) {
bb_perror_msg("ioctl");
int err;
if (cmd == SIOCCHGTUNNEL && p->name[0]) {
- strcpy(ifr.ifr_name, p->name);
+ strncpy(ifr.ifr_name, p->name, sizeof(ifr.ifr_name));
} else {
- strcpy(ifr.ifr_name, basedev);
+ strncpy(ifr.ifr_name, basedev, sizeof(ifr.ifr_name));
}
ifr.ifr_ifru.ifru_data = (void*)p;
- fd = socket(AF_INET, SOCK_DGRAM, 0);
+ fd = xsocket(AF_INET, SOCK_DGRAM, 0);
err = ioctl(fd, cmd, &ifr);
if (err) {
bb_perror_msg("ioctl");
int err;
if (p->name[0]) {
- strcpy(ifr.ifr_name, p->name);
+ strncpy(ifr.ifr_name, p->name, sizeof(ifr.ifr_name));
} else {
- strcpy(ifr.ifr_name, basedev);
+ strncpy(ifr.ifr_name, basedev, sizeof(ifr.ifr_name));
}
ifr.ifr_ifru.ifru_data = (void*)p;
- fd = socket(AF_INET, SOCK_DGRAM, 0);
+ fd = xsocket(AF_INET, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCDELTUNNEL, &ifr);
if (err) {
bb_perror_msg("ioctl");
if (strcmp(*argv, "ipip") == 0 ||
strcmp(*argv, "ip/ip") == 0) {
if (p->iph.protocol && p->iph.protocol != IPPROTO_IPIP) {
- bb_error_msg("You managed to ask for more than one tunnel mode.");
+ bb_error_msg("you managed to ask for more than one tunnel mode");
exit(-1);
}
p->iph.protocol = IPPROTO_IPIP;
} else if (strcmp(*argv, "gre") == 0 ||
strcmp(*argv, "gre/ip") == 0) {
if (p->iph.protocol && p->iph.protocol != IPPROTO_GRE) {
- bb_error_msg("You managed to ask for more than one tunnel mode.");
+ bb_error_msg("you managed to ask for more than one tunnel mode");
exit(-1);
}
p->iph.protocol = IPPROTO_GRE;
} else if (strcmp(*argv, "sit") == 0 ||
strcmp(*argv, "ipv6/ip") == 0) {
if (p->iph.protocol && p->iph.protocol != IPPROTO_IPV6) {
- bb_error_msg("You managed to ask for more than one tunnel mode.");
+ bb_error_msg("you managed to ask for more than one tunnel mode");
exit(-1);
}
p->iph.protocol = IPPROTO_IPV6;
} else {
- bb_error_msg("Cannot guess tunnel mode.");
+ bb_error_msg("cannot guess tunnel mode");
exit(-1);
}
} else if (strcmp(*argv, "key") == 0) {
NEXT_ARG();
if (strcmp(*argv, "inherit") != 0) {
if (get_unsigned(&uval, *argv, 0))
- invarg("invalid TTL\n", *argv);
+ invarg(*argv, "TTL");
if (uval > 255)
- invarg("TTL must be <=255\n", *argv);
+ invarg(*argv, "TTL must be <=255");
p->iph.ttl = uval;
}
} else if (strcmp(*argv, "tos") == 0 ||
matches(*argv, "dsfield") == 0) {
- __u32 uval;
+ uint32_t uval;
NEXT_ARG();
if (strcmp(*argv, "inherit") != 0) {
if (rtnl_dsfield_a2n(&uval, *argv))
- invarg("bad TOS value", *argv);
+ invarg(*argv, "TOS");
p->iph.tos = uval;
} else
p->iph.tos = 1;
if (p->iph.protocol == IPPROTO_IPIP || p->iph.protocol == IPPROTO_IPV6) {
if ((p->i_flags & GRE_KEY) || (p->o_flags & GRE_KEY)) {
- bb_error_msg("Keys are not allowed with ipip and sit.");
+ bb_error_msg("keys are not allowed with ipip and sit");
return -1;
}
}
p->o_flags |= GRE_KEY;
}
if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) {
- bb_error_msg("Broadcast tunnel requires a source address.");
+ bb_error_msg("broadcast tunnel requires a source address");
return -1;
}
return 0;
if (p->iph.tos) {
SPRINT_BUF(b1);
printf(" tos");
- if (p->iph.tos&1)
+ if (p->iph.tos & 1)
printf(" inherit");
- if (p->iph.tos&~1)
- printf("%c%s ", p->iph.tos&1 ? '/' : ' ',
- rtnl_dsfield_n2a(p->iph.tos&~1, b1, sizeof(b1)));
+ if (p->iph.tos & ~1)
+ printf("%c%s ", p->iph.tos & 1 ? '/' : ' ',
+ rtnl_dsfield_n2a(p->iph.tos & ~1, b1, sizeof(b1)));
}
- if (!(p->iph.frag_off&htons(IP_DF)))
+ if (!(p->iph.frag_off & htons(IP_DF)))
printf(" nopmtudisc");
- if ((p->i_flags&GRE_KEY) && (p->o_flags&GRE_KEY) && p->o_key == p->i_key)
+ if ((p->i_flags & GRE_KEY) && (p->o_flags & GRE_KEY) && p->o_key == p->i_key)
printf(" key %s", s3);
- else if ((p->i_flags|p->o_flags)&GRE_KEY) {
- if (p->i_flags&GRE_KEY)
+ else if ((p->i_flags | p->o_flags) & GRE_KEY) {
+ if (p->i_flags & GRE_KEY)
printf(" ikey %s ", s3);
- if (p->o_flags&GRE_KEY)
+ if (p->o_flags & GRE_KEY)
printf(" okey %s ", s4);
}
- if (p->i_flags&GRE_SEQ)
+ if (p->i_flags & GRE_SEQ)
printf("%s Drop packets out of sequence.\n", _SL_);
- if (p->i_flags&GRE_CSUM)
+ if (p->i_flags & GRE_CSUM)
printf("%s Checksum in received packet is required.", _SL_);
- if (p->o_flags&GRE_SEQ)
+ if (p->o_flags & GRE_SEQ)
printf("%s Sequence packets on output.", _SL_);
- if (p->o_flags&GRE_CSUM)
+ if (p->o_flags & GRE_CSUM)
printf("%s Checksum output packets.", _SL_);
}
static int do_tunnels_list(struct ip_tunnel_parm *p)
{
char name[IFNAMSIZ];
- unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
- rx_fifo, rx_frame,
- tx_bytes, tx_packets, tx_errs, tx_drops,
- tx_fifo, tx_colls, tx_carrier, rx_multi;
+ unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
+ rx_fifo, rx_frame,
+ tx_bytes, tx_packets, tx_errs, tx_drops,
+ tx_fifo, tx_colls, tx_carrier, rx_multi;
int type;
struct ip_tunnel_parm p1;
-
char buf[512];
FILE *fp = fopen("/proc/net/dev", "r");
+
if (fp == NULL) {
perror("fopen");
return -1;
while (fgets(buf, sizeof(buf), fp) != NULL) {
char *ptr;
- buf[sizeof(buf) - 1] = 0;
- if ((ptr = strchr(buf, ':')) == NULL ||
+
+ /*buf[sizeof(buf) - 1] = 0; - fgets is safe anyway */
+ ptr = strchr(buf, ':');
+ if (ptr == NULL ||
(*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
- bb_error_msg("Wrong format of /proc/net/dev. Sorry.");
+ bb_error_msg("wrong format of /proc/net/dev. Sorry");
return -1;
}
- if (sscanf(ptr, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld",
+ if (sscanf(ptr, "%lu%lu%lu%lu%lu%lu%lu%*d%lu%lu%lu%lu%lu%lu%lu",
&rx_bytes, &rx_packets, &rx_errs, &rx_drops,
&rx_fifo, &rx_frame, &rx_multi,
&tx_bytes, &tx_packets, &tx_errs, &tx_drops,
continue;
type = do_ioctl_get_iftype(name);
if (type == -1) {
- bb_error_msg("Failed to get type of [%s]", name);
+ bb_error_msg("failed to get type of [%s]", name);
continue;
}
if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
(p->i_key && p1.i_key != p->i_key))
continue;
print_tunnel(&p1);
- printf("\n");
+ puts("");
}
return 0;
}
return -1;
print_tunnel(&p);
- printf("\n");
+ puts("");
return 0;
}
} else
return do_show(0, NULL);
- bb_error_msg("Command \"%s\" is unknown.", *argv);
- exit(-1);
+ bb_error_msg_and_die("command \"%s\" is unknown", *argv);
}
projects / oweals / busybox.git / blobdiff