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Fix ip command to not crash when interface name is too long. 

always use strncpy(.., IFNAMSIZ)

(Logical change 1.79)
This commit is contained in:
osdl.net!shemminger 2004-09-01 17:15:45 +00:00
parent 139a7898b6
commit 71058eb8ef
3 changed files with 30 additions and 26 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
2004-09-01 Stephen Hemminger <shemminger@osdl.org>
* Fix ip command to not crash when interface name is too long.
always use strncpy(.., IFNAMSIZ)
2004-08-31 Stephen Hemminger <shemminger@osdl.org>
* Add gact documentation from jamal

26
ip/iplink.c
View File

@ -82,13 +82,13 @@ static int get_ctl_fd(void)
return -1;
}
static int do_chflags(char *dev, __u32 flags, __u32 mask)
static int do_chflags(const char *dev, __u32 flags, __u32 mask)
{
struct ifreq ifr;
int fd;
int err;
strcpy(ifr.ifr_name, dev);
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
fd = get_ctl_fd();
if (fd < 0)
return -1;
@ -109,14 +109,14 @@ static int do_chflags(char *dev, __u32 flags, __u32 mask)
return err;
}
static int do_changename(char *dev, char *newdev)
static int do_changename(const char *dev, const char *newdev)
{
struct ifreq ifr;
int fd;
int err;
strcpy(ifr.ifr_name, dev);
strcpy(ifr.ifr_newname, newdev);
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
strncpy(ifr.ifr_newname, newdev, IFNAMSIZ);
fd = get_ctl_fd();
if (fd < 0)
return -1;
@ -130,7 +130,7 @@ static int do_changename(char *dev, char *newdev)
return err;
}
static int set_qlen(char *dev, int qlen)
static int set_qlen(const char *dev, int qlen)
{
struct ifreq ifr;
int s;
@ -140,7 +140,7 @@ static int set_qlen(char *dev, int qlen)
return -1;
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, dev);
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
ifr.ifr_qlen = qlen;
if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
perror("SIOCSIFXQLEN");
@ -152,7 +152,7 @@ static int set_qlen(char *dev, int qlen)
return 0;
}
static int set_mtu(char *dev, int mtu)
static int set_mtu(const char *dev, int mtu)
{
struct ifreq ifr;
int s;
@ -162,7 +162,7 @@ static int set_mtu(char *dev, int mtu)
return -1;
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, dev);
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
ifr.ifr_mtu = mtu;
if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
perror("SIOCSIFMTU");
@ -174,7 +174,7 @@ static int set_mtu(char *dev, int mtu)
return 0;
}
static int get_address(char *dev, int *htype)
static int get_address(const char *dev, int *htype)
{
struct ifreq ifr;
struct sockaddr_ll me;
@ -188,7 +188,7 @@ static int get_address(char *dev, int *htype)
}
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, dev);
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
perror("SIOCGIFINDEX");
close(s);
@ -216,12 +216,12 @@ static int get_address(char *dev, int *htype)
return me.sll_halen;
}
static int parse_address(char *dev, int hatype, int halen, char *lla, struct ifreq *ifr)
static int parse_address(const char *dev, int hatype, int halen, char *lla, struct ifreq *ifr)
{
int alen;
memset(ifr, 0, sizeof(*ifr));
strcpy(ifr->ifr_name, dev);
strncpy(ifr->ifr_name, dev, IFNAMSIZ);
ifr->ifr_hwaddr.sa_family = hatype;
alen = ll_addr_a2n(ifr->ifr_hwaddr.sa_data, 14, lla);
if (alen < 0)

25
ip/iptunnel.c
View File

@ -52,13 +52,13 @@ static void usage(void)
exit(-1);
}
static int do_ioctl_get_ifindex(char *dev)
static int do_ioctl_get_ifindex(const char *dev)
{
struct ifreq ifr;
int fd;
int err;
strcpy(ifr.ifr_name, dev);
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
fd = socket(AF_INET, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCGIFINDEX, &ifr);
if (err) {
@ -69,13 +69,13 @@ static int do_ioctl_get_ifindex(char *dev)
return ifr.ifr_ifindex;
}
static int do_ioctl_get_iftype(char *dev)
static int do_ioctl_get_iftype(const char *dev)
{
struct ifreq ifr;
int fd;
int err;
strcpy(ifr.ifr_name, dev);
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
fd = socket(AF_INET, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCGIFHWADDR, &ifr);
if (err) {
@ -105,14 +105,13 @@ static char * do_ioctl_get_ifname(int idx)
}
static int do_get_ioctl(char *basedev, struct ip_tunnel_parm *p)
static int do_get_ioctl(const char *basedev, struct ip_tunnel_parm *p)
{
struct ifreq ifr;
int fd;
int err;
strcpy(ifr.ifr_name, basedev);
strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
ifr.ifr_ifru.ifru_data = (void*)p;
fd = socket(AF_INET, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCGETTUNNEL, &ifr);
@ -122,16 +121,16 @@ static int do_get_ioctl(char *basedev, struct ip_tunnel_parm *p)
return err;
}
static int do_add_ioctl(int cmd, char *basedev, struct ip_tunnel_parm *p)
static int do_add_ioctl(int cmd, const char *basedev, struct ip_tunnel_parm *p)
{
struct ifreq ifr;
int fd;
int err;
if (cmd == SIOCCHGTUNNEL && p->name[0])
strcpy(ifr.ifr_name, p->name);
strncpy(ifr.ifr_name, p->name, IFNAMSIZ);
else
strcpy(ifr.ifr_name, basedev);
strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
ifr.ifr_ifru.ifru_data = (void*)p;
fd = socket(AF_INET, SOCK_DGRAM, 0);
err = ioctl(fd, cmd, &ifr);
@ -141,16 +140,16 @@ static int do_add_ioctl(int cmd, char *basedev, struct ip_tunnel_parm *p)
return err;
}
static int do_del_ioctl(char *basedev, struct ip_tunnel_parm *p)
static int do_del_ioctl(const char *basedev, struct ip_tunnel_parm *p)
{
struct ifreq ifr;
int fd;
int err;
if (p->name[0])
strcpy(ifr.ifr_name, p->name);
strncpy(ifr.ifr_name, p->name, IFNAMSIZ);
else
strcpy(ifr.ifr_name, basedev);
strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
ifr.ifr_ifru.ifru_data = (void*)p;
fd = socket(AF_INET, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCDELTUNNEL, &ifr);