patch for get_sa_len in libpcap-2003.09.10

["Mike Wiacek" <mike () iroot net>]

get_sa_len was getting called with a null pointer from here (in
pcap_findalldevs):

 if (add_addr_to_iflist(&devlist, ifa->ifa_name,
                    ifa->ifa_flags, ifa->ifa_addr,
SA_LEN(ifa->ifa_addr),
                    ifa->ifa_netmask, SA_LEN(ifa->ifa_netmask),
                    broadaddr, broadaddr_size, dstaddr, dstaddr_size,
                    errbuf) < 0) {


ifa->ifa_netmask was null, and get_sa_len was segfaulting when it
tried to
switch on it.

attached is a very brief patch that check if addr is a null pointer
before
attempting to swtich on it. It seems to work fine for me.


mike wiacek

Attachment: get_sa_len.patch
Description: