void set_default_output_ifaces() { default_out_iface_v4 = get_any_output_iface(AF_INET); if (default_out_iface_v4 != NULL) { lispd_log_msg(LISP_LOG_DEBUG_2,"Default IPv4 iface %s\n",default_out_iface_v4->iface_name); #ifdef ROUTER set_tun_default_route_v4(); #endif } default_out_iface_v6 = get_any_output_iface(AF_INET6); if (default_out_iface_v6 != NULL) { lispd_log_msg(LISP_LOG_DEBUG_2,"Default IPv6 iface %s\n",default_out_iface_v6->iface_name); #ifdef ROUTER // For IPv6, the route is not updated and should be removed before adding the new one del_tun_default_route_v6(); set_tun_default_route_v6(); #endif } if (!default_out_iface_v4 && !default_out_iface_v6){ lispd_log_msg(LISP_LOG_CRIT,"NO OUTPUT IFACE: all the locators are down"); } }
/* * Creates the routes to send the traffic to the tun interface to be encapsulated */ int configure_routing_to_tun() { lispd_mapping_list *list = NULL; lispd_mapping_list *list_elt = NULL; lisp_addr_t *tun_v4_addr = NULL; lisp_addr_t *tun_v6_addr = NULL; lispd_mapping_elt *mapping = NULL; uint32_t iface_index = 0; if (tun_bring_up_iface(TUN_IFACE_NAME) != GOOD){ return (BAD); } if (router_mode == FALSE) { /* * For mobile node mode, we create two /1 routes covering the full IP addresses space to route all traffic * generated by the node to the lispTun0 interface * IPv4: 0.0.0.0/1 and 128.0.0.0/1 * IPv6: ::/1 and 8000::/1 */ tun_v4_addr = get_main_eid(AF_INET); tun_v6_addr = get_main_eid(AF_INET6); if (tun_v4_addr != NULL){ if (tun_add_eid_to_iface(*tun_v4_addr,TUN_IFACE_NAME) != GOOD){ return (BAD); } if (set_tun_default_route_v4() != GOOD){ return (BAD); } } if (tun_v6_addr != NULL){ if (tun_add_eid_to_iface(*tun_v6_addr,TUN_IFACE_NAME) != GOOD){ return (BAD); } if (set_tun_default_route_v6() != GOOD){ return (BAD); } } }else{ /* * For router mode, add a new routing table with default route to tun interface. Using source routing, * We send all traffic generated by EIDs to this table */ list = get_all_mappings(AF_UNSPEC); list_elt = list; /* Create rules to the new table */ while (list_elt != NULL){ mapping = list_elt->mapping; if (add_rule(mapping->eid_prefix.afi, 0, LISP_TABLE, RULE_TO_LISP_TABLE_PRIORITY, RTN_UNICAST, &(mapping->eid_prefix), mapping->eid_prefix_length, NULL,0,0)!=GOOD){ free_mapping_list(list, FALSE); return (BAD); } list_elt = list_elt->next; if (add_rule(mapping->eid_prefix.afi, 0, RT_TABLE_MAIN, RULE_AVOID_LISP_TABLE_PRIORITY, RTN_UNICAST, NULL,0, &(mapping->eid_prefix), mapping->eid_prefix_length, 0)!=GOOD){ free_mapping_list(list, FALSE); return (BAD); } } /* Add default route into the new table */ iface_index = if_nametoindex(TUN_IFACE_NAME); tun_v4_addr = get_main_eid(AF_INET); tun_v6_addr = get_main_eid(AF_INET6); if (tun_v4_addr != NULL){ add_route(AF_INET,iface_index,NULL,NULL,NULL,0,RULE_TO_LISP_TABLE_PRIORITY,LISP_TABLE); } if (tun_v6_addr != NULL){ add_route(AF_INET6,iface_index,NULL,NULL,NULL,0,RULE_TO_LISP_TABLE_PRIORITY,LISP_TABLE); } free_mapping_list(list, FALSE); } return (GOOD); }
void process_address_change ( lispd_iface_elt *iface, lisp_addr_t new_addr) { lisp_addr_t *iface_addr = NULL; lispd_iface_mappings_list *mapping_list = NULL; int aux_afi = 0; // XXX To be modified when full NAT implemented --> When Nat Aware active no IPv6 RLOCs supported if (nat_aware == TRUE && new_addr.afi == AF_INET6) { return; } /* Check if the addres is a global address*/ if (is_link_local_addr(new_addr) == TRUE) { lispd_log_msg(LISP_LOG_DEBUG_2,"precess_address_change: the extractet address from the netlink " "messages is a local link address: %s discarded", get_char_from_lisp_addr_t(new_addr)); return; } /* If default RLOC afi defined (-a 4 or 6), only accept addresses of the specified afi */ if (default_rloc_afi != AF_UNSPEC && default_rloc_afi != new_addr.afi) { lispd_log_msg(LISP_LOG_DEBUG_2,"precess_address_change: Default RLOC afi defined (-a #): Skipped %s address in iface %s", (new_addr.afi == AF_INET) ? "IPv4" : "IPv6",iface->iface_name); return; } /* * Actions to be done due to a change of address: SMR */ switch (new_addr.afi) { case AF_INET: iface_addr = iface->ipv4_address; break; case AF_INET6: iface_addr = iface->ipv6_address; break; } // Same address that we already have if (compare_lisp_addr_t(iface_addr,&new_addr)==0) { lispd_log_msg(LISP_LOG_DEBUG_2,"precess_address_change: The detected change of address for interface %s " "doesn't affect",iface->iface_name); /* We must rebind the socket just in case the address is from a virtual interface who has changed its interafce number */ switch (new_addr.afi) { case AF_INET: bind_socket_src_address(iface->out_socket_v4,&new_addr); break; case AF_INET6: bind_socket_src_address(iface->out_socket_v6,&new_addr); break; } return; } /* * Change source routing rules for this interface and binding */ if (iface_addr->afi != AF_UNSPEC) { del_rule(iface_addr->afi, 0, iface->iface_index, iface->iface_index, RTN_UNICAST, iface_addr, (iface_addr->afi == AF_INET) ? 32 : 128, NULL,0,0); } add_rule(new_addr.afi, 0, iface->iface_index, iface->iface_index, RTN_UNICAST, &new_addr, (new_addr.afi == AF_INET) ? 32 : 128, NULL,0,0); switch (new_addr.afi) { case AF_INET: bind_socket_src_address(iface->out_socket_v4,&new_addr); break; case AF_INET6: bind_socket_src_address(iface->out_socket_v6,&new_addr); break; } aux_afi = iface_addr->afi; // Update the new address copy_lisp_addr(iface_addr, &new_addr); /* The interface was down during initial configuratiopn process and now it is up. Activate address */ if (aux_afi == AF_UNSPEC) { lispd_log_msg(LISP_LOG_DEBUG_1,"process_address_change: Activating the locator address %s" , get_char_from_lisp_addr_t(new_addr)); activate_interface_address(iface, new_addr); if (iface->status == UP) { iface_balancing_vectors_calc(iface); /* * If no default control and data interface, recalculate it */ if ((default_ctrl_iface_v4 == NULL && new_addr.afi == AF_INET) || (default_ctrl_iface_v6 == NULL && new_addr.afi == AF_INET6)) { lispd_log_msg(LISP_LOG_DEBUG_2,"No default control interface. Recalculate new control interface"); set_default_ctrl_ifaces(); } if ((default_out_iface_v4 == NULL && new_addr.afi == AF_INET) || (default_out_iface_v6 == NULL && new_addr.afi == AF_INET6)) { lispd_log_msg(LISP_LOG_DEBUG_2,"No default output interface. Recalculate new output interface"); set_default_output_ifaces(); } } } lispd_log_msg(LISP_LOG_DEBUG_1,"precess_address_change: New address detected for interface %s -> %s", iface->iface_name, get_char_from_lisp_addr_t(new_addr)); mapping_list = iface->head_mappings_list; /* Sort again the locators list of the affected mappings*/ while (mapping_list != NULL) { if (aux_afi != AF_UNSPEC && // When the locator is activated, it is automatically sorted ((new_addr.afi == AF_INET && mapping_list->use_ipv4_address == TRUE) || (new_addr.afi == AF_INET6 && mapping_list->use_ipv6_address == TRUE))) { sort_locators_list_elt (mapping_list->mapping, iface_addr); } mapping_list = mapping_list->next; } /* Indicate change of address in the interface */ switch (new_addr.afi) { case AF_INET: iface->ipv4_changed = TRUE; break; case AF_INET6: iface->ipv6_changed = TRUE; break; } /* If it is compiled in router mode, then recompile default routes changing the indicated src address*/ if (router_mode == TRUE) { switch (new_addr.afi) { case AF_INET: if (iface == default_out_iface_v4) { set_tun_default_route_v4(); } break; case AF_INET6: if (iface == default_out_iface_v6) { del_tun_default_route_v6(); set_tun_default_route_v6(); } break; } } /* Check if the new address is behind NAT */ if(nat_aware==TRUE) { // TODO : To be modified when implementing NAT per multiple interfaces nat_status = UNKNOWN; clear_rtr_from_locators (iface); if (iface->status == UP) { initial_info_request_process(); } else { nat_aware_iface_address_change = TRUE; } } /* Reprograming SMR timer*/ if (smr_timer == NULL) { smr_timer = create_timer (SMR_TIMER); } start_timer(smr_timer, LISPD_SMR_TIMEOUT,(timer_callback)init_smr, NULL); }
int main(int argc, char **argv) { lisp_addr_t *tun_v4_addr = NULL; lisp_addr_t *tun_v6_addr = NULL; char *tun_dev_name = TUN_IFACE_NAME; uint32_t iseed = 0; /* initial random number generator */ pid_t pid = 0; /* child pid */ pid_t sid = 0; #ifdef OPENWRT lispd_log_msg(LISP_LOG_INFO,"LISPmob %s compiled for openWRT\n", LISPD_VERSION); #else #ifdef ANDROID open_log_file(); lispd_log_msg(LISP_LOG_INFO,"LISPmob %s compiled for Android\n", LISPD_VERSION); #else lispd_log_msg(LISP_LOG_INFO,"LISPmob %s compiled for Linux\n", LISPD_VERSION); #endif #endif init_globales(); #ifndef ANDROID /* * Check for required capabilities and drop unnecssary privileges */ if(check_capabilities() != GOOD) { exit_cleanup(); } #else /* * Check for superuser privileges */ if (geteuid() != 0) { lispd_log_msg(LISP_LOG_INFO,"Running %s requires superuser privileges! Exiting...\n", LISPD); exit_cleanup(); } #endif /* * Initialize the random number generator */ iseed = (unsigned int) time (NULL); srandom(iseed); /* * Set up signal handlers */ signal(SIGHUP, signal_handler); signal(SIGTERM, signal_handler); signal(SIGINT, signal_handler); signal(SIGQUIT, signal_handler); /* * set up databases */ db_init(); map_cache_init(); init_referral_cache(); /* * Parse command line options */ handle_lispd_command_line(argc, argv); /* * see if we need to daemonize, and if so, do it */ if (daemonize) { lispd_log_msg(LISP_LOG_DEBUG_1, "Starting the daemonizing process1"); if ((pid = fork()) < 0) { exit_cleanup(); } umask(0); if (pid > 0){ exit(EXIT_SUCCESS); } if ((sid = setsid()) < 0){ exit_cleanup(); } if ((chdir("/")) < 0){ exit_cleanup(); } } /* * create timers */ if (build_timers_event_socket(&timers_fd) == 0) { lispd_log_msg(LISP_LOG_CRIT, " Error programing the timer signal. Exiting..."); exit_cleanup(); } init_timers(); /* * Parse config file. Format of the file depends on the node: Linux Box or OpenWRT router */ #ifdef OPENWRT if (config_file == NULL){ config_file = "/etc/config/lispd"; } err = handle_uci_lispd_config_file(config_file); #else if (config_file == NULL){ config_file = "/etc/lispd.conf"; } err = handle_lispd_config_file(config_file); #endif if (err != GOOD){ lispd_log_msg(LISP_LOG_CRIT,"Wrong configuration."); exit_cleanup(); } if (ddt_client == FALSE){ drop_referral_cache(); } /* * Select the default rlocs for output data packets and output control packets */ set_default_output_ifaces(); set_default_ctrl_ifaces(); /* * Create tun interface */ create_tun(tun_dev_name, TUN_RECEIVE_SIZE, TUN_MTU, &tun_receive_fd, &tun_ifindex, &tun_receive_buf); /* * Assign address to the tun interface * Assign route to 0.0.0.0/1 and 128.0.0.0/1 via tun interface * ::/1 and 8000::/1 */ if (router_mode == TRUE){ tun_v4_addr = get_main_eid(AF_INET); if (tun_v4_addr != NULL){ tun_v4_addr = (lisp_addr_t *)malloc(sizeof(lisp_addr_t)); get_lisp_addr_from_char(TUN_LOCAL_V4_ADDR,tun_v4_addr); } tun_v6_addr = get_main_eid(AF_INET6); if (tun_v6_addr != NULL){ tun_v6_addr = (lisp_addr_t *)malloc(sizeof(lisp_addr_t)); get_lisp_addr_from_char(TUN_LOCAL_V6_ADDR,tun_v6_addr); } }else{ tun_v4_addr = get_main_eid(AF_INET); tun_v6_addr = get_main_eid(AF_INET6); } tun_bring_up_iface(tun_dev_name); if (tun_v4_addr != NULL){ tun_add_eid_to_iface(*tun_v4_addr,tun_dev_name); set_tun_default_route_v4(); } if (tun_v6_addr != NULL){ tun_add_eid_to_iface(*tun_v6_addr,tun_dev_name); set_tun_default_route_v6(); } if (router_mode == TRUE){ if (tun_v4_addr != NULL){ free(tun_v4_addr); } if (tun_v6_addr != NULL){ free(tun_v6_addr); } } /* * Generate receive sockets for control (4342) and data port (4341) */ if (default_rloc_afi == AF_UNSPEC || default_rloc_afi == AF_INET){ ipv4_control_input_fd = open_control_input_socket(AF_INET); ipv4_data_input_fd = open_data_input_socket(AF_INET); } if (default_rloc_afi == AF_UNSPEC || default_rloc_afi == AF_INET6){ ipv6_control_input_fd = open_control_input_socket(AF_INET6); ipv6_data_input_fd = open_data_input_socket(AF_INET6); } /* * Create net_link socket to receive notifications of changes of RLOC status. */ netlink_fd = opent_netlink_socket(); lispd_log_msg(LISP_LOG_INFO,"LISPmob (%s): 'lispd' started...", LISPD_VERSION); if (router_mode == TRUE){ lispd_log_msg(LISP_LOG_INFO,"Running as an xTR router"); }else{ lispd_log_msg(LISP_LOG_INFO,"Running as a LISP mobile node"); } /* * Request to dump the routing tables to obtain the gatways when processing the netlink messages */ request_route_table(RT_TABLE_MAIN, AF_INET); process_netlink_msg(netlink_fd); request_route_table(RT_TABLE_MAIN, AF_INET6); process_netlink_msg(netlink_fd); /* * Register to the Map-Server(s) */ map_register (NULL,NULL); /* * SMR proxy-ITRs list to be updated with new mappings */ init_smr(NULL,NULL); /* * RLOC Probing proxy ETRs */ programming_petr_rloc_probing(); event_loop(); lispd_log_msg(LISP_LOG_INFO, "Exiting..."); /* event_loop returned bad */ closelog(); return(0); }
int main(int argc, char **argv) { lisp_addr_t *tun_v4_addr; lisp_addr_t *tun_v6_addr; char *tun_dev_name = TUN_IFACE_NAME; #ifdef ROUTER #ifdef OPENWRT lispd_log_msg(LISP_LOG_INFO,"LISPmob compiled for openWRT xTR\n"); #else lispd_log_msg(LISP_LOG_INFO,"LISPmob compiled for linux xTR\n"); #endif #else lispd_log_msg(LISP_LOG_INFO,"LISPmob compiled for mobile node\n"); #endif /* * Check for superuser privileges */ if (geteuid()) { lispd_log_msg(LISP_LOG_INFO,"Running %s requires superuser privileges! Exiting...\n", LISPD); exit_cleanup(); } /* * Initialize the random number generator */ iseed = (unsigned int) time (NULL); srandom(iseed); /* * Set up signal handlers */ signal(SIGHUP, signal_handler); signal(SIGTERM, signal_handler); signal(SIGINT, signal_handler); signal(SIGQUIT, signal_handler); /* * set up databases */ db_init(); map_cache_init(); /* * Parse command line options */ handle_lispd_command_line(argc, argv); /* * see if we need to daemonize, and if so, do it */ if (daemonize) { lispd_log_msg(LISP_LOG_DEBUG_1, "Starting the daemonizing process"); if ((pid = fork()) < 0) { exit_cleanup(); } umask(0); if (pid > 0) exit_cleanup(); if ((sid = setsid()) < 0) exit_cleanup(); if ((chdir("/")) < 0) exit_cleanup(); close(STDIN_FILENO); close(STDOUT_FILENO); close(STDERR_FILENO); } /* * create timers */ if (build_timers_event_socket(&timers_fd) == 0) { lispd_log_msg(LISP_LOG_CRIT, " Error programing the timer signal. Exiting..."); exit_cleanup(); } init_timers(); /* * Parse config file. Format of the file depends on the node: Linux Box or OpenWRT router */ #ifdef OPENWRT if (config_file == NULL){ config_file = "/etc/config/lispd"; } handle_uci_lispd_config_file(config_file); #else if (config_file == NULL){ config_file = "/etc/lispd.conf"; } handle_lispd_config_file(config_file); #endif if (map_servers == NULL){ lispd_log_msg(LISP_LOG_CRIT, "No Map Server configured. Exiting..."); exit_cleanup(); } if (map_resolvers == NULL){ lispd_log_msg(LISP_LOG_CRIT, "No Map Resolver configured. Exiting..."); exit_cleanup(); } if (proxy_etrs == NULL){ lispd_log_msg(LISP_LOG_WARNING, "No Proxy-ETR defined. Packets to non-LISP destinations will be " "forwarded natively (no LISP encapsulation). This may prevent mobility in some scenarios."); sleep(3); }else{ calculate_balancing_vectors ( proxy_etrs->mapping, &(((rmt_mapping_extended_info *)(proxy_etrs->mapping->extended_info))->rmt_balancing_locators_vecs)); } /* * Select the default rlocs for output data packets and output control packets */ set_default_output_ifaces(); set_default_ctrl_ifaces(); /* * Create tun interface */ create_tun(tun_dev_name, TUN_RECEIVE_SIZE, TUN_MTU, &tun_receive_fd, &tun_ifindex, &tun_receive_buf); /* * Assign address to the tun interface * Assign route to 0.0.0.0/1 and 128.0.0.0/1 via tun interface * ::/1 and 8000::/1 */ #ifdef ROUTER tun_v4_addr = get_main_eid(AF_INET); if (tun_v4_addr != NULL){ tun_v4_addr = (lisp_addr_t *)malloc(sizeof(lisp_addr_t)); get_lisp_addr_from_char(TUN_LOCAL_V4_ADDR,tun_v4_addr); } tun_v6_addr = get_main_eid(AF_INET6); if (tun_v6_addr != NULL){ tun_v6_addr = (lisp_addr_t *)malloc(sizeof(lisp_addr_t)); get_lisp_addr_from_char(TUN_LOCAL_V6_ADDR,tun_v6_addr); } #else tun_v4_addr = get_main_eid(AF_INET); tun_v6_addr = get_main_eid(AF_INET6); #endif tun_bring_up_iface(tun_dev_name); if (tun_v4_addr != NULL){ tun_add_eid_to_iface(*tun_v4_addr,tun_dev_name); set_tun_default_route_v4(); } if (tun_v6_addr != NULL){ tun_add_eid_to_iface(*tun_v6_addr,tun_dev_name); set_tun_default_route_v6(); } #ifdef ROUTER if (tun_v4_addr != NULL){ free(tun_v4_addr); } if (tun_v6_addr != NULL){ free(tun_v6_addr); } #endif /* * Generate receive sockets for control (4342) and data port (4341) */ if (default_rloc_afi == -1 || default_rloc_afi == AF_INET){ ipv4_control_input_fd = open_control_input_socket(AF_INET); ipv4_data_input_fd = open_data_input_socket(AF_INET); } if (default_rloc_afi == -1 || default_rloc_afi == AF_INET6){ ipv6_control_input_fd = open_control_input_socket(AF_INET6); ipv6_data_input_fd = open_data_input_socket(AF_INET6); } /* * Create net_link socket to receive notifications of changes of RLOC status. */ netlink_fd = opent_netlink_socket(); lispd_log_msg(LISP_LOG_INFO,"LISPmob (0.3.3): 'lispd' started..."); /* * Request to dump the routing tables to obtain the gatways when processing the netlink messages */ request_route_table(RT_TABLE_MAIN, AF_INET); process_netlink_msg(netlink_fd); request_route_table(RT_TABLE_MAIN, AF_INET6); process_netlink_msg(netlink_fd); /* * Register to the Map-Server(s) */ map_register (NULL,NULL); /* * SMR proxy-ITRs list to be updated with new mappings */ init_smr(NULL,NULL); /* * RLOC Probing proxy ETRs */ programming_petr_rloc_probing(); event_loop(); lispd_log_msg(LISP_LOG_INFO, "Exiting..."); /* event_loop returned bad */ closelog(); return(0); }