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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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20
networking/interface.c
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@@ -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