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do not overflow ifr_name. maybe it was safe in some places,

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but not everywhere. err to the safe side.
This commit is contained in:
Denis Vlasenko 2006-11-27 23:44:57 +00:00
parent e2d3ded354
commit 229b3d2072
7 changed files with 28 additions and 28 deletions
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2
networking/ether-wake.c
View File

@ -145,7 +145,7 @@ int ether_wake_main(int argc, char *argv[])
{
struct ifreq if_hwaddr;
strcpy(if_hwaddr.ifr_name, ifname);
strncpy(if_hwaddr.ifr_name, ifname, sizeof(if_hwaddr.ifr_name));
if (ioctl(s, SIOCGIFHWADDR, &if_hwaddr) < 0)
bb_perror_msg_and_die("SIOCGIFHWADDR on %s failed", ifname);

20
networking/interface.c
View File

@ -617,12 +617,12 @@ static int if_fetch(struct interface *ife)
int fd;
char *ifname = ife->name;
strcpy(ifr.ifr_name, ifname);
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(skfd, SIOCGIFFLAGS, &ifr) < 0)
return -1;
ife->flags = ifr.ifr_flags;
strcpy(ifr.ifr_name, ifname);
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(skfd, SIOCGIFHWADDR, &ifr) < 0)
memset(ife->hwaddr, 0, 32);
else
@ -630,20 +630,20 @@ static int if_fetch(struct interface *ife)
ife->type = ifr.ifr_hwaddr.sa_family;
strcpy(ifr.ifr_name, ifname);
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(skfd, SIOCGIFMETRIC, &ifr) < 0)
ife->metric = 0;
else
ife->metric = ifr.ifr_metric;
strcpy(ifr.ifr_name, ifname);
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(skfd, SIOCGIFMTU, &ifr) < 0)
ife->mtu = 0;
else
ife->mtu = ifr.ifr_mtu;
#ifdef SIOCGIFMAP
strcpy(ifr.ifr_name, ifname);
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(skfd, SIOCGIFMAP, &ifr) == 0)
ife->map = ifr.ifr_map;
else
@ -651,7 +651,7 @@ static int if_fetch(struct interface *ife)
memset(&ife->map, 0, sizeof(struct ifmap));
#ifdef HAVE_TXQUEUELEN
strcpy(ifr.ifr_name, ifname);
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(skfd, SIOCGIFTXQLEN, &ifr) < 0)
ife->tx_queue_len = -1; /* unknown value */
else
@ -663,24 +663,24 @@ static int if_fetch(struct interface *ife)
/* IPv4 address? */
fd = get_socket_for_af(AF_INET);
if (fd >= 0) {
strcpy(ifr.ifr_name, ifname);
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
ifr.ifr_addr.sa_family = AF_INET;
if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
ife->has_ip = 1;
ife->addr = ifr.ifr_addr;
strcpy(ifr.ifr_name, ifname);
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCGIFDSTADDR, &ifr) < 0)
memset(&ife->dstaddr, 0, sizeof(struct sockaddr));
else
ife->dstaddr = ifr.ifr_dstaddr;
strcpy(ifr.ifr_name, ifname);
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCGIFBRDADDR, &ifr) < 0)
memset(&ife->broadaddr, 0, sizeof(struct sockaddr));
else
ife->broadaddr = ifr.ifr_broadaddr;
strcpy(ifr.ifr_name, ifname);
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCGIFNETMASK, &ifr) < 0)
memset(&ife->netmask, 0, sizeof(struct sockaddr));
else

2
networking/libiproute/ipaddress.c
View File

@ -86,7 +86,7 @@ static void print_queuelen(char *name)
return;
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, name);
strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
if (ioctl(s, SIOCGIFTXQLEN, &ifr) < 0) {
perror("SIOCGIFXQLEN");
close(s);

14
networking/libiproute/iplink.c
View File

@ -61,7 +61,7 @@ static int do_chflags(char *dev, __u32 flags, __u32 mask)
int fd;
int err;
strcpy(ifr.ifr_name, dev);
strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
fd = get_ctl_fd();
if (fd < 0)
return -1;
@ -88,8 +88,8 @@ static int do_changename(char *dev, char *newdev)
int fd;
int err;
strcpy(ifr.ifr_name, dev);
strcpy(ifr.ifr_newname, 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;
@ -113,7 +113,7 @@ 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, sizeof(ifr.ifr_name));
ifr.ifr_qlen = qlen;
if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
perror("SIOCSIFXQLEN");
@ -135,7 +135,7 @@ 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, sizeof(ifr.ifr_name));
ifr.ifr_mtu = mtu;
if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
perror("SIOCSIFMTU");
@ -161,7 +161,7 @@ static int get_address(char *dev, int *htype)
}
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, dev);
strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
perror("SIOCGIFINDEX");
close(s);
@ -194,7 +194,7 @@ static int parse_address(char *dev, int hatype, int halen, char *lla, struct ifr
int alen;
memset(ifr, 0, sizeof(*ifr));
strcpy(ifr->ifr_name, dev);
strncpy(ifr->ifr_name, dev, sizeof(ifr->ifr_name));
ifr->ifr_hwaddr.sa_family = hatype;
alen = ll_addr_a2n((unsigned char *)(ifr->ifr_hwaddr.sa_data), 14, lla);
if (alen < 0)

14
networking/libiproute/iptunnel.c
View File

@ -42,7 +42,7 @@ static int do_ioctl_get_ifindex(char *dev)
struct ifreq ifr;
int fd;
strcpy(ifr.ifr_name, dev);
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");
@ -57,7 +57,7 @@ static int do_ioctl_get_iftype(char *dev)
struct ifreq ifr;
int fd;
strcpy(ifr.ifr_name, dev);
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");
@ -91,7 +91,7 @@ static int do_get_ioctl(char *basedev, struct ip_tunnel_parm *p)
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 = xsocket(AF_INET, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCGETTUNNEL, &ifr);
@ -109,9 +109,9 @@ static int do_add_ioctl(int cmd, char *basedev, struct ip_tunnel_parm *p)
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 = xsocket(AF_INET, SOCK_DGRAM, 0);
@ -130,9 +130,9 @@ static int do_del_ioctl(char *basedev, struct ip_tunnel_parm *p)
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 = xsocket(AF_INET, SOCK_DGRAM, 0);

2
networking/route.c
View File

@ -422,7 +422,7 @@ static void INET6_setroute(int action, char **args)
if (devname) {
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, devname);
strncpy(ifr.ifr_name, devname, sizeof(ifr.ifr_name));
if (ioctl(skfd, SIOGIFINDEX, &ifr) < 0) {
bb_perror_msg_and_die("SIOGIFINDEX");

2
networking/udhcp/socket.c
View File

@ -51,7 +51,7 @@ int read_interface(char *interface, int *ifindex, uint32_t *addr, uint8_t *arp)
}
ifr.ifr_addr.sa_family = AF_INET;
strcpy(ifr.ifr_name, interface);
strncpy(ifr.ifr_name, interface, sizeof(ifr.ifr_name));
if (addr) {
if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
bb_perror_msg("SIOCGIFADDR failed, is the interface up and configured?");