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modified scan_address() fixing possible netmask bitlen error when -a provided IP address lacks slash (#1012)

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dwj0 2022-06-11 21:38:44 +08:00 committed by GitHub
parent 4a2c9ef914
commit a88236aee3
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1 changed files with 5 additions and 8 deletions
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13
src/edge.c
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@ -105,17 +105,14 @@ static int scan_address (char * ip_addr, size_t addr_size,
if(!end)
// no slash present -- default end
end = s + strlen(s);
else
// slash is present. now, handle the sub-network address
sscanf(end + 1, "%u", &bitlen);
strncpy(ip_addr, start, (size_t)MIN(end - start, addr_size - 1)); // ensure NULL term
if(end) {
// slash is present
// now, handle the sub-network address
sscanf(end + 1, "%u", &bitlen);
bitlen = htobe32(bitlen2mask(bitlen));
inet_ntop(AF_INET, &bitlen, netmask, netmask_size);
}
bitlen = htobe32(bitlen2mask(bitlen));
inet_ntop(AF_INET, &bitlen, netmask, netmask_size);
return retval;
}