busybox/networking/libiproute/iplink.c
Bernhard Reutner-Fischer d591a360d3 - merge -r15463:15564 from busybox_scratch branch through these changesets:
------------------------------------------------------------------------
r15465 | aldot | 2006-06-21 20:48:06 +0200 (Wed, 21 Jun 2006) | 3 lines

- use CONFIG_BUSYBOX_EXEC_PATH as before it one was broken by a recent revert.
- use xchdir() since all is invain if it fails there anyways, supposedly

------------------------------------------------------------------------
r15466 | aldot | 2006-06-21 20:55:16 +0200 (Wed, 21 Jun 2006) | 2 lines

- adjust docs to take CONFIG_BUSYBOX_EXEC_PATH into account.

------------------------------------------------------------------------
r15467 | aldot | 2006-06-21 21:31:24 +0200 (Wed, 21 Jun 2006) | 18 lines

- partial fallout of my TREE_USED touchup against gcc-4.2: rip unused vars, save
s 144 bytes
   text    data     bss     dec     hex filename
 862434   10156  645924 1518514  172bb2 busybox.old
 862322   10156  645892 1518370  172b22 busybox
function                                             old     new   delta
z_len                                                  4       -      -4
textend                                                4       -      -4
part_nb                                                4       -      -4
insize                                                 4       -      -4
ifile_size                                             4       -      -4
do_link                                                4       -      -4
new_text                                              70      60     -10
ipaddr_list_link                                      33      23     -10
gzip_main                                            898     822     -76
------------------------------------------------------------------------------
(add/remove: 0/6 grow/shrink: 0/3 up/down: 0/-120)           Total: -120 bytes


------------------------------------------------------------------------
r15468 | aldot | 2006-06-21 21:43:05 +0200 (Wed, 21 Jun 2006) | 19 lines

- remove useless global exports
function                                             old     new   delta
rpm_main                                             940    1601    +661
rpm_getstring                                        107     112      +5
rpm_getint                                           148     153      +5
loop_through_files                                   103     106      +3
fileaction_dobackup                                  115     113      -2
fileaction_list                                        5       -      -5
rpm_getcount                                          42       -     -42
extract_cpio_gz                                      161       -    -161
rpm_gettags                                          504       -    -504
------------------------------------------------------------------------------
(add/remove: 0/4 grow/shrink: 4/1 up/down: 674/-714)          Total: -40 bytes

   text    data     bss     dec     hex filename
 862322   10156  645892 1518370  172b22 busybox.old
 862290   10156  645892 1518338  172b02 busybox


------------------------------------------------------------------------
r15555 | aldot | 2006-06-30 14:10:11 +0200 (Fri, 30 Jun 2006) | 22 lines

- shrink syslog a little bit, move a big buffer (for 'line') off the bss, fold s
emaphore stuff into single caller manually.
  stats:
function                                             old     new   delta
logMessage                                           395     427     +32
message                                             1245    1257     +12
opts                                                   -       4      +4
small                                                  1       -      -1
local_logging                                          4       -      -4
doRemoteLog                                            4       -      -4
circular_logging                                       4       -      -4
syslogd_main                                        1299    1285     -14
static.res                                            36      16     -20
.rodata                                           186650  186586     -64
static.line                                         1025       -   -1025
------------------------------------------------------------------------------
(add/remove: 1/5 grow/shrink: 2/3 up/down: 48/-1136)        Total: -1088 bytes
cow@s37:~/src/busybox_scratch$ size sysklogd/syslogd.o{.orig,}
   text    data     bss     dec     hex filename
   3723     348    5242    9313    2461 sysklogd/syslogd.o.orig
   3697     348    4188    8233    2029 sysklogd/syslogd.o

==============================================================================
Overall bloatcheck for the changeset mentioned above:
function                                             old     new   delta
rpm_main                                             953    1608    +655
logMessage                                           395     427     +32
message                                             1245    1257     +12
opts                                                   -       4      +4
rpm_getstring                                        107     110      +3
rpm_getint                                           148     151      +3
loop_through_files                                   103     104      +1
small                                                  1       -      -1
fileaction_dobackup                                  115     113      -2
z_len                                                  4       -      -4
textend                                                4       -      -4
part_nb                                                4       -      -4
local_logging                                          4       -      -4
insize                                                 4       -      -4
ifile_size                                             4       -      -4
do_link                                                4       -      -4
doRemoteLog                                            4       -      -4
circular_logging                                       4       -      -4
fileaction_list                                        5       -      -5
new_text                                              70      60     -10
ipaddr_list_link                                      33      23     -10
clear_bufs                                            31      21     -10
syslogd_main                                        1287    1273     -14
builtin_help                                         190     176     -14
static.res                                            36      16     -20
builtin_source                                       229     199     -30
rpm_getcount                                          42       -     -42
gzip_main                                            842     786     -56
.rodata                                           227176  227112     -64
lash_main                                            609     527     -82
busy_loop                                           3883    3739    -144
extract_cpio_gz                                      155       -    -155
rpm_gettags                                          501       -    -501
static.line                                         1025       -   -1025
------------------------------------------------------------------------------
(add/remove: 1/15 grow/shrink: 6/12 up/down: 710/-2221)     Total: -1511 bytes
2006-08-20 17:35:13 +00:00

355 lines
6.6 KiB
C

/* vi: set sw=4 ts=4: */
/*
* iplink.c "ip link".
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <net/if.h>
#include <net/if_packet.h>
#include <netpacket/packet.h>
#include <net/ethernet.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
/* take from linux/sockios.h */
#define SIOCSIFNAME 0x8923 /* set interface name */
static int on_off(char *msg)
{
bb_error_msg("Error: argument of \"%s\" must be \"on\" or \"off\"", msg);
return -1;
}
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;
perror("Cannot create control socket");
return -1;
}
static int do_chflags(char *dev, __u32 flags, __u32 mask)
{
struct ifreq ifr;
int fd;
int err;
strcpy(ifr.ifr_name, dev);
fd = get_ctl_fd();
if (fd < 0)
return -1;
err = ioctl(fd, SIOCGIFFLAGS, &ifr);
if (err) {
perror("SIOCGIFFLAGS");
close(fd);
return -1;
}
if ((ifr.ifr_flags^flags)&mask) {
ifr.ifr_flags &= ~mask;
ifr.ifr_flags |= mask&flags;
err = ioctl(fd, SIOCSIFFLAGS, &ifr);
if (err)
perror("SIOCSIFFLAGS");
}
close(fd);
return err;
}
static int do_changename(char *dev, char *newdev)
{
struct ifreq ifr;
int fd;
int err;
strcpy(ifr.ifr_name, dev);
strcpy(ifr.ifr_newname, newdev);
fd = get_ctl_fd();
if (fd < 0)
return -1;
err = ioctl(fd, SIOCSIFNAME, &ifr);
if (err) {
perror("SIOCSIFNAME");
close(fd);
return -1;
}
close(fd);
return err;
}
static int 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));
strcpy(ifr.ifr_name, dev);
ifr.ifr_qlen = qlen;
if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
perror("SIOCSIFXQLEN");
close(s);
return -1;
}
close(s);
return 0;
}
static int 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));
strcpy(ifr.ifr_name, dev);
ifr.ifr_mtu = mtu;
if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
perror("SIOCSIFMTU");
close(s);
return -1;
}
close(s);
return 0;
}
static int get_address(char *dev, int *htype)
{
struct ifreq ifr;
struct sockaddr_ll me;
socklen_t alen;
int s;
s = socket(PF_PACKET, SOCK_DGRAM, 0);
if (s < 0) {
perror("socket(PF_PACKET)");
return -1;
}
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, dev);
if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
perror("SIOCGIFINDEX");
close(s);
return -1;
}
memset(&me, 0, sizeof(me));
me.sll_family = AF_PACKET;
me.sll_ifindex = ifr.ifr_ifindex;
me.sll_protocol = htons(ETH_P_LOOP);
if (bind(s, (struct sockaddr*)&me, sizeof(me)) == -1) {
perror("bind");
close(s);
return -1;
}
alen = sizeof(me);
if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) {
perror("getsockname");
close(s);
return -1;
}
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)
{
int alen;
memset(ifr, 0, sizeof(*ifr));
strcpy(ifr->ifr_name, dev);
ifr->ifr_hwaddr.sa_family = hatype;
alen = ll_addr_a2n((unsigned char *)(ifr->ifr_hwaddr.sa_data), 14, lla);
if (alen < 0)
return -1;
if (alen != halen) {
bb_error_msg("Wrong address (%s) length: expected %d bytes", lla, halen);
return -1;
}
return 0;
}
static int 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) {
perror(brd?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR");
close(s);
return -1;
}
close(s);
return 0;
}
static int do_set(int argc, char **argv)
{
char *dev = NULL;
__u32 mask = 0;
__u32 flags = 0;
int qlen = -1;
int mtu = -1;
char *newaddr = NULL;
char *newbrd = NULL;
struct ifreq ifr0, ifr1;
char *newname = NULL;
int htype, halen;
while (argc > 0) {
if (strcmp(*argv, "up") == 0) {
mask |= IFF_UP;
flags |= IFF_UP;
} else if (strcmp(*argv, "down") == 0) {
mask |= IFF_UP;
flags &= ~IFF_UP;
} else if (strcmp(*argv, "name") == 0) {
NEXT_ARG();
newname = *argv;
} else if (strcmp(*argv, "mtu") == 0) {
NEXT_ARG();
if (mtu != -1)
duparg("mtu", *argv);
if (get_integer(&mtu, *argv, 0))
invarg(*argv, "mtu");
} else if (strcmp(*argv, "multicast") == 0) {
NEXT_ARG();
mask |= IFF_MULTICAST;
if (strcmp(*argv, "on") == 0) {
flags |= IFF_MULTICAST;
} else if (strcmp(*argv, "off") == 0) {
flags &= ~IFF_MULTICAST;
} else
return on_off("multicast");
} else if (strcmp(*argv, "arp") == 0) {
NEXT_ARG();
mask |= IFF_NOARP;
if (strcmp(*argv, "on") == 0) {
flags &= ~IFF_NOARP;
} else if (strcmp(*argv, "off") == 0) {
flags |= IFF_NOARP;
} else
return on_off("noarp");
} else if (strcmp(*argv, "addr") == 0) {
NEXT_ARG();
newaddr = *argv;
} else {
if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
}
if (dev)
duparg2("dev", *argv);
dev = *argv;
}
argc--; argv++;
}
if (!dev) {
bb_error_msg(bb_msg_requires_arg, "\"dev\"");
exit(-1);
}
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;
}
if (newbrd) {
if (parse_address(dev, htype, halen, newbrd, &ifr1) < 0)
return -1;
}
}
if (newname && strcmp(dev, newname)) {
if (do_changename(dev, newname) < 0)
return -1;
dev = newname;
}
if (qlen != -1) {
if (set_qlen(dev, qlen) < 0)
return -1;
}
if (mtu != -1) {
if (set_mtu(dev, mtu) < 0)
return -1;
}
if (newaddr || newbrd) {
if (newbrd) {
if (set_address(&ifr1, 1) < 0)
return -1;
}
if (newaddr) {
if (set_address(&ifr0, 0) < 0)
return -1;
}
}
if (mask)
return do_chflags(dev, flags, mask);
return 0;
}
static int ipaddr_list_link(int argc, char **argv)
{
preferred_family = AF_PACKET;
return ipaddr_list_or_flush(argc, argv, 0);
}
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
return ipaddr_list_link(0, NULL);
bb_error_msg("Command \"%s\" is unknown.", *argv);
exit(-1);
}