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Diffstat (limited to 'networking/libiproute/iplink.c')
-rw-r--r--networking/libiproute/iplink.c166
1 files changed, 61 insertions, 105 deletions
diff --git a/networking/libiproute/iplink.c b/networking/libiproute/iplink.c
index cb6ee96..0943726 100644
--- a/networking/libiproute/iplink.c
+++ b/networking/libiproute/iplink.c
@@ -22,63 +22,54 @@
#include "utils.h"
#include "ip_common.h"
-/* take from linux/sockios.h */
+/* taken from linux/sockios.h */
#define SIOCSIFNAME 0x8923 /* set interface name */
-static int on_off(const char *msg)
+static void on_off(const char *msg) ATTRIBUTE_NORETURN;
+static void on_off(const char *msg)
{
- bb_error_msg("error: argument of \"%s\" must be \"on\" or \"off\"", msg);
- return -1;
+ bb_error_msg_and_die("error: argument of \"%s\" must be \"on\" or \"off\"", msg);
}
+/* Exits on error */
static int get_ctl_fd(void)
{
- int s_errno;
int fd;
fd = socket(PF_INET, SOCK_DGRAM, 0);
if (fd >= 0)
return fd;
- s_errno = errno;
fd = socket(PF_PACKET, SOCK_DGRAM, 0);
if (fd >= 0)
return fd;
fd = socket(PF_INET6, SOCK_DGRAM, 0);
if (fd >= 0)
return fd;
- errno = s_errno;
- bb_perror_msg("cannot create control socket");
- return -1;
+ bb_perror_msg_and_die("cannot create control socket");
}
-static int do_chflags(char *dev, uint32_t flags, uint32_t mask)
+/* Exits on error */
+static void do_chflags(char *dev, uint32_t flags, uint32_t mask)
{
struct ifreq ifr;
int fd;
- int err;
strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
fd = get_ctl_fd();
- if (fd < 0)
- return -1;
- err = ioctl(fd, SIOCGIFFLAGS, &ifr);
- if (err) {
- bb_perror_msg("SIOCGIFFLAGS");
- close(fd);
- return -1;
+ if (ioctl(fd, SIOCGIFFLAGS, &ifr)) {
+ bb_perror_msg_and_die("SIOCGIFFLAGS");
}
- if ((ifr.ifr_flags^flags)&mask) {
+ if ((ifr.ifr_flags ^ flags) & mask) {
ifr.ifr_flags &= ~mask;
- ifr.ifr_flags |= mask&flags;
- err = ioctl(fd, SIOCSIFFLAGS, &ifr);
- if (err)
- bb_perror_msg("SIOCSIFFLAGS");
+ ifr.ifr_flags |= mask & flags;
+ if (ioctl(fd, SIOCSIFFLAGS, &ifr))
+ bb_perror_msg_and_die("SIOCSIFFLAGS");
}
close(fd);
- return err;
}
-static int do_changename(char *dev, char *newdev)
+/* Exits on error */
+static void do_changename(char *dev, char *newdev)
{
struct ifreq ifr;
int fd;
@@ -87,62 +78,46 @@ static int do_changename(char *dev, char *newdev)
strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
strncpy(ifr.ifr_newname, newdev, sizeof(ifr.ifr_newname));
fd = get_ctl_fd();
- if (fd < 0)
- return -1;
err = ioctl(fd, SIOCSIFNAME, &ifr);
if (err) {
- bb_perror_msg("SIOCSIFNAME");
- close(fd);
- return -1;
+ bb_perror_msg_and_die("SIOCSIFNAME");
}
close(fd);
- return err;
}
-static int set_qlen(char *dev, int qlen)
+/* Exits on error */
+static void set_qlen(char *dev, int qlen)
{
struct ifreq ifr;
int s;
s = get_ctl_fd();
- if (s < 0)
- return -1;
-
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
ifr.ifr_qlen = qlen;
if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
- bb_perror_msg("SIOCSIFXQLEN");
- close(s);
- return -1;
+ bb_perror_msg_and_die("SIOCSIFXQLEN");
}
close(s);
-
- return 0;
}
-static int set_mtu(char *dev, int mtu)
+/* Exits on error */
+static void set_mtu(char *dev, int mtu)
{
struct ifreq ifr;
int s;
s = get_ctl_fd();
- if (s < 0)
- return -1;
-
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
ifr.ifr_mtu = mtu;
if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
- bb_perror_msg("SIOCSIFMTU");
- close(s);
- return -1;
+ bb_perror_msg_and_die("SIOCSIFMTU");
}
close(s);
-
- return 0;
}
+/* Exits on error */
static int get_address(char *dev, int *htype)
{
struct ifreq ifr;
@@ -152,16 +127,13 @@ static int get_address(char *dev, int *htype)
s = socket(PF_PACKET, SOCK_DGRAM, 0);
if (s < 0) {
- bb_perror_msg("socket(PF_PACKET)");
- return -1;
+ bb_perror_msg_and_die("socket(PF_PACKET)");
}
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
- bb_perror_msg("SIOCGIFINDEX");
- close(s);
- return -1;
+ bb_perror_msg_and_die("SIOCGIFINDEX");
}
memset(&me, 0, sizeof(me));
@@ -169,23 +141,20 @@ static int get_address(char *dev, int *htype)
me.sll_ifindex = ifr.ifr_ifindex;
me.sll_protocol = htons(ETH_P_LOOP);
if (bind(s, (struct sockaddr*)&me, sizeof(me)) == -1) {
- bb_perror_msg("bind");
- close(s);
- return -1;
+ bb_perror_msg_and_die("bind");
}
alen = sizeof(me);
if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) {
- bb_perror_msg("getsockname");
- close(s);
- return -1;
+ bb_perror_msg_and_die("getsockname");
}
close(s);
*htype = me.sll_hatype;
return me.sll_halen;
}
-static int parse_address(char *dev, int hatype, int halen, char *lla, struct ifreq *ifr)
+/* Exits on error */
+static void parse_address(char *dev, int hatype, int halen, char *lla, struct ifreq *ifr)
{
int alen;
@@ -194,31 +163,26 @@ static int parse_address(char *dev, int hatype, int halen, char *lla, struct ifr
ifr->ifr_hwaddr.sa_family = hatype;
alen = ll_addr_a2n((unsigned char *)(ifr->ifr_hwaddr.sa_data), 14, lla);
if (alen < 0)
- return -1;
+ exit(1);
if (alen != halen) {
- bb_error_msg("wrong address (%s) length: expected %d bytes", lla, halen);
- return -1;
+ bb_error_msg_and_die("wrong address (%s) length: expected %d bytes", lla, halen);
}
- return 0;
}
-static int set_address(struct ifreq *ifr, int brd)
+/* Exits on error */
+static void set_address(struct ifreq *ifr, int brd)
{
int s;
s = get_ctl_fd();
- if (s < 0)
- return -1;
- if (ioctl(s, brd?SIOCSIFHWBROADCAST:SIOCSIFHWADDR, ifr) < 0) {
- bb_perror_msg(brd ? "SIOCSIFHWBROADCAST" : "SIOCSIFHWADDR");
- close(s);
- return -1;
+ if (ioctl(s, brd ? SIOCSIFHWBROADCAST :SIOCSIFHWADDR, ifr) < 0) {
+ bb_perror_msg_and_die(brd ? "SIOCSIFHWBROADCAST" : "SIOCSIFHWADDR");
}
close(s);
- return 0;
}
+/* Return value becomes exitcode. It's okay to not return at all */
static int do_set(int argc, char **argv)
{
char *dev = NULL;
@@ -256,7 +220,7 @@ static int do_set(int argc, char **argv)
} else if (strcmp(*argv, "off") == 0) {
flags &= ~IFF_MULTICAST;
} else
- return on_off("multicast");
+ on_off("multicast");
} else if (strcmp(*argv, "arp") == 0) {
NEXT_ARG();
mask |= IFF_NOARP;
@@ -265,7 +229,7 @@ static int do_set(int argc, char **argv)
} else if (strcmp(*argv, "off") == 0) {
flags |= IFF_NOARP;
} else
- return on_off("noarp");
+ on_off("noarp");
} else if (strcmp(*argv, "addr") == 0) {
NEXT_ARG();
newaddr = *argv;
@@ -277,53 +241,44 @@ static int do_set(int argc, char **argv)
duparg2("dev", *argv);
dev = *argv;
}
- argc--; argv++;
+ argc--;
+ argv++;
}
if (!dev) {
- bb_error_msg(bb_msg_requires_arg, "\"dev\"");
- exit(-1);
+ bb_error_msg_and_die(bb_msg_requires_arg, "\"dev\"");
}
if (newaddr || newbrd) {
halen = get_address(dev, &htype);
- if (halen < 0)
- return -1;
if (newaddr) {
- if (parse_address(dev, htype, halen, newaddr, &ifr0) < 0)
- return -1;
+ parse_address(dev, htype, halen, newaddr, &ifr0);
}
if (newbrd) {
- if (parse_address(dev, htype, halen, newbrd, &ifr1) < 0)
- return -1;
+ parse_address(dev, htype, halen, newbrd, &ifr1);
}
}
if (newname && strcmp(dev, newname)) {
- if (do_changename(dev, newname) < 0)
- return -1;
+ do_changename(dev, newname);
dev = newname;
}
if (qlen != -1) {
- if (set_qlen(dev, qlen) < 0)
- return -1;
+ set_qlen(dev, qlen);
}
if (mtu != -1) {
- if (set_mtu(dev, mtu) < 0)
- return -1;
+ set_mtu(dev, mtu);
}
if (newaddr || newbrd) {
if (newbrd) {
- if (set_address(&ifr1, 1) < 0)
- return -1;
+ set_address(&ifr1, 1);
}
if (newaddr) {
- if (set_address(&ifr0, 0) < 0)
- return -1;
+ set_address(&ifr0, 0);
}
}
if (mask)
- return do_chflags(dev, flags, mask);
+ do_chflags(dev, flags, mask);
return 0;
}
@@ -333,18 +288,19 @@ static int ipaddr_list_link(int argc, char **argv)
return ipaddr_list_or_flush(argc, argv, 0);
}
+/* Return value becomes exitcode. It's okay to not return at all */
int do_iplink(int argc, char **argv)
{
- if (argc > 0) {
- if (matches(*argv, "set") == 0)
- return do_set(argc-1, argv+1);
- if (matches(*argv, "show") == 0 ||
- matches(*argv, "lst") == 0 ||
- matches(*argv, "list") == 0)
- return ipaddr_list_link(argc-1, argv+1);
- } else
+ if (argc <= 0)
return ipaddr_list_link(0, NULL);
- bb_error_msg("command \"%s\" is unknown", *argv);
- exit(-1);
+ if (matches(*argv, "set") == 0)
+ return do_set(argc-1, argv+1);
+
+ if (matches(*argv, "show") == 0 ||
+ matches(*argv, "lst") == 0 ||
+ matches(*argv, "list") == 0)
+ return ipaddr_list_link(argc-1, argv+1);
+
+ bb_error_msg_and_die("command \"%s\" is unknown", *argv);
}
generated by cgit v1.1 at 2024-12-28 05:00:12 +0000