patricia_node_t* ptree_add_rule(patricia_tree_t *ptree, char *line) {
char *ip, *bits, *slash = NULL;
struct in_addr addr4;
struct in6_addr addr6;
patricia_node_t *node = NULL;
ip = line;
bits = strchr(line, '/');
if(bits == NULL)
bits = (char*)"/32";
else {
slash = bits;
slash[0] = '\0';
}
/*bits存储掩码位数*/
bits++;
ntop->getTrace()->traceEvent(TRACE_DEBUG, "Rule %s/%s", ip, bits);
if(strchr(ip, ':') != NULL) { /* IPv6 */
if(inet_pton(AF_INET6, ip, &addr6) == 1)
node = add_to_ptree(ptree, AF_INET6, &addr6, atoi(bits));
else
ntop->getTrace()->traceEvent(TRACE_ERROR, "Error parsing IPv6 %s\n", ip);
} else { /* IPv4 */
/*笔者注：个人认为也可以用inet_aton,在linux下测试感觉是一样的。*/
/* inet_aton(ip, &addr4) fails parsing subnets */
int num_octets;
u_int ip4_0 = 0, ip4_1 = 0, ip4_2 = 0, ip4_3 = 0;
u_char *ip4 = (u_char *) &addr4;
if((num_octets = sscanf(ip, "%u.%u.%u.%u", &ip4_0, &ip4_1, &ip4_2, &ip4_3)) >= 1) {
int num_bits = atoi(bits);
ip4[0] = ip4_0, ip4[1] = ip4_1, ip4[2] = ip4_2, ip4[3] = ip4_3;
if(num_bits > 32) num_bits = 32;
if(num_octets * 8 < num_bits)
ntop->getTrace()->traceEvent(TRACE_INFO, "Found IP smaller than netmask [%s]", line);
//addr4.s_addr = ntohl(addr4.s_addr);
node = add_to_ptree(ptree, AF_INET, &addr4, num_bits);
} else {
ntop->getTrace()->traceEvent(TRACE_ERROR, "Error parsing IPv4 %s\n", ip);
}
}
if(slash) slash[0] = '/';
return(node);
}
static void ptree_add_rule(patricia_tree_t *ptree, char *line) {
char *ip, *bits;
struct in_addr addr4;
struct in6_addr addr6;
ip = line;
bits = strchr(line, '/');
if(bits == NULL)
bits = (char*)"/32";
bits[0] = '\0'; bits++;
ntop->getTrace()->traceEvent(TRACE_DEBUG, "Rule '%s'/'%s'\n", ip, bits);
if(strchr(ip, ':') != NULL) { /* IPv6 */
if(inet_pton(AF_INET6, ip, &addr6) == 1)
add_to_ptree(ptree, AF_INET6, &addr6, atoi(bits));
else
ntop->getTrace()->traceEvent(TRACE_ERROR, "Error parsing IPv6 %s\n", ip);
} else { /* IPv4 */
/* inet_aton(ip, &addr4) fails parsing subnets */
int num_octets, ip4_0 = 0, ip4_1 = 0, ip4_2 = 0, ip4_3 = 0;
u_char *ip4 = (u_char *) &addr4;
if((num_octets = sscanf(ip, "%u.%u.%u.%u", &ip4_0, &ip4_1, &ip4_2, &ip4_3)) >= 1) {
ip4[0] = ip4_0, ip4[1] = ip4_1, ip4[2] = ip4_2, ip4[3] = ip4_3;
if(num_octets * 8 < atoi(bits))
ntop->getTrace()->traceEvent(TRACE_WARNING, "Found ip smaller than netmask\n");
//addr4.s_addr = ntohl(addr4.s_addr);
add_to_ptree(ptree, AF_INET, &addr4, atoi(bits));
} else {
ntop->getTrace()->traceEvent(TRACE_ERROR, "Error parsing IPv4 %s\n", ip);
}
}
}