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Fixed a bug in devname2ipaddr(). The IP returned by the function was always 2.0.0.0 due to an error handling a pointer. Check http://seclists.org/nmap-dev/2009/q3/0047.html for detailed information. Also, devname2ipaddr() now makes sure we are dealing with AF_INET devices (currently the getinterfaces() function already skips non AF_INET interfaces, but this way it won't break if that changes in the future.)

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luis
2009-07-07 14:37:19 +00:00
parent fca6e39c60
commit 2b4e4e7a8d
1 changed files with 5 additions and 1 deletions
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6
tcpip.cc
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@@ -2798,6 +2798,7 @@ int ipaddr2devname(char *dev, const struct in_addr *addr) {
int devname2ipaddr(char *dev, struct in_addr *addr) { int devname2ipaddr(char *dev, struct in_addr *addr) {
struct interface_info *mydevs; struct interface_info *mydevs;
struct sockaddr_in *s;
int numdevs; int numdevs;
int i; int i;
mydevs = getinterfaces(&numdevs); mydevs = getinterfaces(&numdevs);
@@ -2805,8 +2806,11 @@ mydevs = getinterfaces(&numdevs);
if (!mydevs) return -1; if (!mydevs) return -1;
for(i=0; i < numdevs; i++) { for(i=0; i < numdevs; i++) {
s=(struct sockaddr_in *)&mydevs[i].addr;
if (s->sin_family!=AF_INET) /* Currently we only support IPv4 */
continue;
if (!strcmp(dev, mydevs[i].devfullname)) { if (!strcmp(dev, mydevs[i].devfullname)) {
memcpy(addr, (char *) &mydevs[i].addr, sizeof(struct in_addr)); memcpy(addr, (char *) &s->sin_addr, sizeof(struct in_addr));
return 0; return 0;
} }
} }