/**
* Add a network interface to the list of lwIP netifs.
*
* @param netif a pre-allocated netif structure
* @param ipaddr IP address for the new netif
* @param netmask network mask for the new netif
* @param gw default gateway IP address for the new netif
* @param state opaque data passed to the new netif
* @param init callback function that initializes the interface
* @param input callback function that is called to pass
* ingress packets up in the protocol layer stack.
*
* @return netif, or NULL if failed.
*/
struct netif *netif_add(struct netif *netif, ip_addr_t *ipaddr,
ip_addr_t *netmask, ip_addr_t *gw, void *state,
netif_init_fn init, netif_input_fn input)
{
/* reset new interface configuration state */
ip_addr_set_zero(&netif->ip_addr);
ip_addr_set_zero(&netif->netmask);
ip_addr_set_zero(&netif->gw);
netif->flags = 0;
#if LWIP_DHCP
/* netif not under DHCP control by default */
netif->dhcp = NULL;
#endif /* LWIP_DHCP */
#if LWIP_AUTOIP
/* netif not under AutoIP control by default */
netif->autoip = NULL;
#endif /* LWIP_AUTOIP */
#if LWIP_NETIF_STATUS_CALLBACK
netif->status_callback = NULL;
#endif /* LWIP_NETIF_STATUS_CALLBACK */
#if LWIP_NETIF_LINK_CALLBACK
netif->link_callback = NULL;
#endif /* LWIP_NETIF_LINK_CALLBACK */
#if LWIP_IGMP
netif->igmp_mac_filter = NULL;
#endif /* LWIP_IGMP */
#if ENABLE_LOOPBACK
netif->loop_first = NULL;
netif->loop_last = NULL;
#endif /* ENABLE_LOOPBACK */
/* remember netif specific state information data */
netif->state = state;
netif->num = netif_num++;
netif->input = input;
NETIF_SET_HWADDRHINT(netif, NULL);
#if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
netif->loop_cnt_current = 0;
#endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
netif_set_addr(netif, ipaddr, netmask, gw);
/* call user specified initialization function for netif */
if (init(netif) != ERR_OK) {
return NULL;
}
/* add this netif to the list */
netif->next = netif_list;
netif_list = netif;
snmp_inc_iflist();
#if LWIP_IGMP
/* start IGMP processing */
if (netif->flags & NETIF_FLAG_IGMP) {
igmp_start(netif);
}
#endif /* LWIP_IGMP */
LWIP_DEBUGF(NETIF_DEBUG,
("netif: added interface %c%c IP addr " IP4_F " netmask " IP4_F " gw " IP4_F "\n",
netif->name[0], netif->name[1], IP4_FV(ipaddr), IP4_FV(netmask), IP4_FV(gw)));
return netif;
}
/**
* Add a network interface to the list of lwIP netifs.
*
* @param netif a pre-allocated netif structure
* @param ipaddr IP address for the new netif
* @param netmask network mask for the new netif
* @param gw default gateway IP address for the new netif
* @param state opaque data passed to the new netif
* @param init callback function that initializes the interface
* @param input callback function that is called to pass
* ingress packets up in the protocol layer stack.
*
* @return netif, or NULL if failed.
*/
struct netif *
netif_add(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
ip_addr_t *gw, void *state, netif_init_fn init, netif_input_fn input)
{
#if LWIP_IPV6
u32_t i;
#endif
LWIP_ASSERT("No init function given", init != NULL);
/* reset new interface configuration state */
ip_addr_set_zero(&netif->ip_addr);
ip_addr_set_zero(&netif->netmask);
ip_addr_set_zero(&netif->gw);
#if LWIP_IPV6
for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
ip6_addr_set_zero(&netif->ip6_addr[i]);
netif_ip6_addr_set_state(netif, i, IP6_ADDR_INVALID);
}
netif->output_ip6 = netif_null_output_ip6;
#endif /* LWIP_IPV6 */
netif->flags = 0;
#if LWIP_DHCP
/* netif not under DHCP control by default */
netif->dhcp = NULL;
#endif /* LWIP_DHCP */
#if LWIP_AUTOIP
/* netif not under AutoIP control by default */
netif->autoip = NULL;
#endif /* LWIP_AUTOIP */
#if LWIP_IPV6_AUTOCONFIG
/* IPv6 address autoconfiguration not enabled by default */
netif->ip6_autoconfig_enabled = 0;
#endif /* LWIP_IPV6_AUTOCONFIG */
#if LWIP_IPV6_SEND_ROUTER_SOLICIT
netif->rs_count = LWIP_ND6_MAX_MULTICAST_SOLICIT;
#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */
#if LWIP_IPV6_DHCP6
/* netif not under DHCPv6 control by default */
netif->dhcp6 = NULL;
#endif /* LWIP_IPV6_DHCP6 */
#if LWIP_NETIF_STATUS_CALLBACK
netif->status_callback = NULL;
#endif /* LWIP_NETIF_STATUS_CALLBACK */
#if LWIP_NETIF_LINK_CALLBACK
netif->link_callback = NULL;
#endif /* LWIP_NETIF_LINK_CALLBACK */
#if LWIP_IGMP
netif->igmp_mac_filter = NULL;
#endif /* LWIP_IGMP */
#if LWIP_IPV6 && LWIP_IPV6_MLD
netif->mld_mac_filter = NULL;
#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
#if ENABLE_LOOPBACK
netif->loop_first = NULL;
netif->loop_last = NULL;
#endif /* ENABLE_LOOPBACK */
/* remember netif specific state information data */
netif->state = state;
netif->num = netif_num++;
netif->input = input;
NETIF_SET_HWADDRHINT(netif, NULL);
#if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
netif->loop_cnt_current = 0;
#endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
netif_set_addr(netif, ipaddr, netmask, gw);
/* call user specified initialization function for netif */
if (init(netif) != ERR_OK) {
return NULL;
}
/* add this netif to the list */
netif->next = netif_list;
netif_list = netif;
snmp_inc_iflist();
#if LWIP_IGMP
/* start IGMP processing */
if (netif->flags & NETIF_FLAG_IGMP) {
igmp_start(netif);
}
#endif /* LWIP_IGMP */
LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
netif->name[0], netif->name[1]));
ip_addr_debug_print(NETIF_DEBUG, ipaddr);
LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
ip_addr_debug_print(NETIF_DEBUG, netmask);
LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
ip_addr_debug_print(NETIF_DEBUG, gw);
LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
return netif;
}
void interface_init (struct interface *netif, void *state, netif_input_fn input)
{
static u8_t netifnum = 0;
#if LWIP_IPV6
u32_t i;
#endif
/* reset new interface configuration state */
ip_addr_set_zero(&netif->ip_addr);
ip_addr_set_zero(&netif->netmask);
ip_addr_set_zero(&netif->gw);
#if LWIP_IPV6
for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
ip6_addr_set_zero(&netif->ip6_addr[i]);
netif_ip6_addr_set_state(netif, i, IP6_ADDR_INVALID);
}
#endif /* LWIP_IPV6 */
netif->flags = 0;
#if LWIP_DHCP
/* netif not under DHCP control by default */
netif->dhcp = NULL;
#endif /* LWIP_DHCP */
#if LWIP_AUTOIP
/* netif not under AutoIP control by default */
netif->autoip = NULL;
#endif /* LWIP_AUTOIP */
#if LWIP_IPV6_AUTOCONFIG
/* IPv6 address autoconfiguration not enabled by default */
netif->ip6_autoconfig_enabled = 0;
#endif /* LWIP_IPV6_AUTOCONFIG */
#if LWIP_IPV6_SEND_ROUTER_SOLICIT
netif->rs_count = LWIP_ND6_MAX_MULTICAST_SOLICIT;
#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */
#if LWIP_IPV6_DHCP6
/* netif not under DHCPv6 control by default */
netif->dhcp6 = NULL;
#endif /* LWIP_IPV6_DHCP6 */
#if LWIP_NETIF_STATUS_CALLBACK
netif->status_callback = NULL;
#endif /* LWIP_NETIF_STATUS_CALLBACK */
#if LWIP_NETIF_LINK_CALLBACK
netif->link_callback = NULL;
#endif /* LWIP_NETIF_LINK_CALLBACK */
#if LWIP_IGMP
netif->igmp_mac_filter = NULL;
#endif /* LWIP_IGMP */
#if LWIP_IPV6 && LWIP_IPV6_MLD
netif->mld_mac_filter = NULL;
#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
#if ENABLE_LOOPBACK
netif->loop_first = NULL;
netif->loop_last = NULL;
#endif /* ENABLE_LOOPBACK */
/* remember netif specific state information data */
netif->state = state;
netif->num = netifnum++;
netif->input = input;
#if LWIP_NETIF_HWADDRHINT
netif->addr_hint = NULL;
#endif /* LWIP_NETIF_HWADDRHINT */
#if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
netif->loop_cnt_current = 0;
#endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
#ifdef CONFIG_OPENSWITCH_TCP_IP
ethernetif_init (netif);
#else
netif->linkoutput = low_level_output;
#endif
if_zebra_new_hook (netif);
#if 0
/* call user specified initialization function for netif */
if (init (netif) != ERR_OK)
{
return NULL;
}
#endif
/* add this netif to the list */
#ifdef CONFIG_OPENSWITCH_TCP_IP
snmp_inc_iflist ();
#endif
#if 0
/* start IGMP processing */
if (netif->flags & NETIF_FLAG_IGMP)
{
igmp_start (netif);
}
#endif /* LWIP_IGMP */
LWIP_DEBUGF (NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
netif->ifDescr[0], netif->ifDescr[1]));
LWIP_DEBUGF (NETIF_DEBUG, ("\n"));
return;
}
int main(int argc, char *argv[])
{
int c;
int keep_alive;
int non_local;
struct netif *netif;
int dns_count;
char *str;
char *endptr;
int mtu;
int fd_in;
int fd_out;
ip4_addr_t ipaddr;
ip4_addr_t netmask;
ip4_addr_t gateway;
ip4_addr_t dns;
struct event_base *base;
char *pcap_file;
struct conn_info *local;
struct conn_info *remote;
struct conn_info *socks;
struct conn_info *info;
ip_addr_set_zero(&ipaddr);
ip_addr_set_zero(&netmask);
ip_addr_set_zero(&gateway);
local = remote = socks = NULL;
dns_count = 0;
keep_alive = 0;
fd_in = 0;
fd_out = 1;
mtu = 0;
pcap_file = NULL;
non_local = 0;
signal(SIGPIPE, SIG_IGN);
base = event_base_new();
lwip_init();
libevent_timeouts_init(base);
if ((str = getenv("INTERNAL_IP4_ADDRESS")))
ip4addr_aton(str, &ipaddr);
if ((str = getenv("INTERNAL_IP4_MTU")))
mtu = strtoul(str, NULL, 0);
if ((str = getenv("VPNFD")))
fd_in = fd_out = strtoul(str, NULL, 0);
if ((str = getenv("CISCO_DEF_DOMAIN"))) {
endptr = str;
while ((str = tokenize(endptr, ", ", &endptr)))
host_add_search(str);
}
if ((str = getenv("INTERNAL_IP4_DNS"))) {
endptr = str;
while ((str = tokenize(endptr, ", ", &endptr))) {
ip4addr_aton(str, &dns);
dns_setserver(dns_count++, &dns);
free(str);
}
}
while ((c = getopt(argc, argv, "L:D:R:k:m:s:d:i:n:G:p:gh")) != -1) {
switch (c) {
case 'L':
info = parse_conn_info(optarg, 4);
if (!info)
print_usage(argv[0]);
info->next = local;
local = info;
break;
case 'D':
info = parse_conn_info(optarg, 2);
if (!info)
print_usage(argv[0]);
info->next = socks;
socks = info;
break;
case 'R':
info = parse_conn_info(optarg, 4);
if (!info)
print_usage(argv[0]);
info->next = remote;
remote = info;
break;
case 'k':
keep_alive = strtoul(optarg, &endptr, 0);
if (*endptr)
print_usage(argv[0]);
keep_alive *= 1000;
break;
case 'm':
mtu = strtoul(optarg, &endptr, 0);
if (*endptr)
print_usage(argv[0]);
break;
case 's':
while ((str = tokenize(optarg, ", ", &optarg)))
host_add_search(str);
break;
case 'd':
while ((str = tokenize(optarg, ", ", &optarg))) {
ip4addr_aton(str, &dns);
dns_setserver(dns_count++, &dns);
free(str);
}
break;
case 'i':
ip4addr_aton(optarg, &ipaddr);
break;
case 'n':
ip4addr_aton(optarg, &netmask);
break;
case 'G':
ip4addr_aton(optarg, &gateway);
break;
#ifdef USE_PCAP
case 'p':
pcap_file = strdup(optarg);
break;
#endif
case 'g':
non_local = 1;
break;
default:
print_usage(argv[0]);
}
}
while (local) {
info = local;
str = info->bind && info->bind[0] ? info->bind : NULL;
if (!non_local)
str = str ? : "localhost";
if (forward_local(base, str, info->bind_port,
info->host, info->host_port, keep_alive) < 0)
return -1;
local = info->next;
free_conn_info(info);
}
while (socks) {
info = socks;
str = info->bind && info->bind[0] ? info->bind : NULL;
if (!non_local)
str = str ? : "localhost";
if (socks_listen(base, str, info->bind_port, keep_alive) < 0)
return -1;
socks = socks->next;
free_conn_info(info);
}
while (remote) {
info = remote;
if (forward_remote(base, info->bind_port, info->host,
info->host_port, keep_alive) < 0)
return -1;
remote = info->next;
free_conn_info(info);
}
netif = tunif_add(base, fd_in, fd_out, pcap_file);
netif_set_ipaddr(netif, &ipaddr);
netif_set_netmask(netif, &netmask);
netif_set_gw(netif, &gateway);
if (mtu)
netif->mtu = mtu;
netif_set_up(netif);
event_base_dispatch(base);
return 0;
}
