/* Calculate final configuration values needed for ipv4-mapped-ipv6 */
static void finalize_ipv4_mapped_ipv6_config(struct config *config)
{
set_ipv4_defaults(config);
config->live_local_ip = ipv4_parse(config->live_local_ip_string);
config->live_remote_ip = ipv4_parse(config->live_remote_ip_string);
config->live_prefix_len =
netmask_to_prefix(config->live_netmask_ip_string);
config->live_gateway_ip = ipv4_parse(config->live_gateway_ip_string);
config->live_bind_ip = ipv6_parse("::");
config->live_connect_ip = ipv6_map_from_ipv4(config->live_remote_ip);
config->socket_domain = AF_INET6;
config->wire_protocol = AF_INET;
}
/*
* Convert ip v4 presentation to binary and set network mask if CIDR notation is present
*
* @return number of bits in the network mask, 32 if no CIDR mask is present
*/
int ipv4_pton(const char * p, struct in_addr * n) {
char * e = strchr(p, '/');
if (e) {
char * endp;
uint64_t bits64 = strtoul(e + 1, &endp, 10);
if (e + 1 == endp)
return -1; /* digits not present */
if (* endp)
return -1; /* junk after digits */
if (32 < bits64)
return -1; /* out of range */
if (ipv4_parse_section(p, e - p, n)) {
ipv4_set_mask(n, (int) bits64);
return (int) bits64;
}
} else {
if (ipv4_parse(p, n)) {
return 32; /* no CIDR notation */
}
}
return -1; /* ip v4 part fails */
}
static void test(void)
{
unsigned i;
for (i = 0; i < sizeof TestCase / sizeof TestCase[0]; i++) {
char p0fbuf[256];
parse_frame pf = { PROT_IPv4, T->iplen, T->ip, NULL };
parse_frame pf2 = { PROT_TCP, T->tcplen, T->tcp, NULL };
/* print */
printf("#%2u:\n", i);
/* parse ip and tcp in order */
ipv4_parse(T->ip, T->iplen, &pf, NULL);
tcp_parse(T->tcp, T->tcplen, &pf2, NULL);
/* generate fingerprint */
p0f2str(p0fbuf, sizeof p0fbuf, (tcp*)T->tcp, T->tcplen,
(ipv4*)T->ip, T->iplen, 0);
if (0 == strcmp(p0fbuf, T->expected_p0f)) {
printf("OK\n");
} else {
printf("%s p0f: %s\nexpected: %s)\n", "!!", p0fbuf, T->expected_p0f);
printf(" IP len=%u ", T->iplen);
dump_chars(T->ip, T->iplen, stdout);
fputc('\n', stdout);
printf(" TCP len=%u ", T->tcplen);
dump_chars(T->tcp, T->tcplen, stdout);
fputc('\n', stdout);
ipv4_dump(&pf, 0, stdout);
tcp_dump(&pf2, 0, stdout);
}
T++;
}
}
/*
* IPV4 presentation parser for a subsection of a string specified by length
*
* @return AM_TRUE if the section of a string can be parsed as an ip v4 presentation
*/
static am_bool_t ipv4_parse_section(const char * p, size_t length, struct in_addr * n) {
am_bool_t output;
char * a = strndup(p, length);
if (a) {
output = ipv4_parse(a, n);
free(a);
} else {
output = AM_FALSE;
}
return output;
}
/* Process a command line option */
static void process_option(int opt, char *optarg, struct config *config,
char *where)
{
int port = 0;
char *end = NULL;
unsigned long speed = 0;
DEBUGP("process_option %d ('%c') = %s\n",
opt, (char)opt, optarg);
switch (opt) {
case OPT_IP_VERSION:
if (strcmp(optarg, "ipv4") == 0)
config->ip_version = IP_VERSION_4;
else if (strcmp(optarg, "ipv4-mapped-ipv6") == 0)
config->ip_version = IP_VERSION_4_MAPPED_6;
else if (strcmp(optarg, "ipv6") == 0)
config->ip_version = IP_VERSION_6;
else
die("%s: bad --ip_version: %s\n", where, optarg);
break;
case OPT_BIND_PORT:
port = atoi(optarg);
if ((port <= 0) || (port > 0xffff))
die("%s: bad --bind_port: %s\n", where, optarg);
//config->live_bind_port = port;
config->default_live_bind_port = port;
break;
case OPT_CODE_COMMAND:
config->code_command_line = optarg;
break;
case OPT_CODE_FORMAT:
config->code_format = optarg;
break;
case OPT_CODE_SOCKOPT:
config->code_sockopt = optarg;
break;
case OPT_CONNECT_PORT:
port = atoi(optarg);
if ((port <= 0) || (port > 0xffff))
die("%s: bad --connect_port: %s\n", where, optarg);
config->default_live_connect_port = port;
break;
case OPT_REMOTE_IP:
strncpy(config->live_remote_ip_string, optarg, ADDR_STR_LEN-1);
break;
case OPT_LOCAL_IP:
strncpy(config->live_local_ip_string, optarg, ADDR_STR_LEN-1);
break;
case OPT_GATEWAY_IP:
strncpy(config->live_gateway_ip_string, optarg, ADDR_STR_LEN-1);
break;
case OPT_MTU:
config->mtu = atoi(optarg);
if (config->mtu < 0)
die("%s: bad --mtu: %s\n", where, optarg);
break;
case OPT_NETMASK_IP:
strncpy(config->live_netmask_ip_string, optarg, ADDR_STR_LEN-1);
break;
case OPT_INIT_SCRIPTS:
config->init_scripts = optarg;
break;
case OPT_NON_FATAL:
parse_non_fatal_arg(optarg, config);
break;
case OPT_SPEED:
speed = strtoul(optarg, &end, 10);
if (end == optarg || *end || !is_valid_u32(speed))
die("%s: bad --speed: %s\n", where, optarg);
config->speed = speed;
break;
case OPT_TOLERANCE_USECS:
config->tolerance_usecs = atoi(optarg);
if (config->tolerance_usecs <= 0)
die("%s: bad --tolerance_usecs: %s\n", where, optarg);
break;
case OPT_TCP_TS_TICK_USECS:
config->tcp_ts_tick_usecs = atoi(optarg);
if (config->tcp_ts_tick_usecs < 0 ||
config->tcp_ts_tick_usecs > 1000000)
die("%s: bad --tcp_ts_tick_usecs: %s\n", where, optarg);
break;
case OPT_WIRE_CLIENT:
config->is_wire_client = true;
break;
case OPT_WIRE_SERVER:
config->is_wire_server = true;
break;
case OPT_WIRE_SERVER_IP:
config->wire_server_ip_string = strdup(optarg);
config->wire_server_ip =
ipv4_parse(config->wire_server_ip_string);
break;
case OPT_WIRE_SERVER_PORT:
port = atoi(optarg);
if ((port <= 0) || (port > 0xffff))
die("%s: bad --wire_server_port: %s\n", where, optarg);
config->wire_server_port = port;
break;
case OPT_WIRE_CLIENT_DEV:
config->wire_client_device = strdup(optarg);
break;
case OPT_WIRE_SERVER_DEV:
config->wire_server_device = strdup(optarg);
break;
case OPT_VERBOSE:
config->verbose = true;
break;
default:
show_usage();
exit(EXIT_FAILURE);
}
}
