From 21b304b46a347772c1338b22fba6a15291bb2945 Mon Sep 17 00:00:00 2001 From: dimitri staessens Date: Sun, 17 Apr 2016 12:08:49 +0200 Subject: ipcpd: initial IPC processes Basic functions for implementation of IPC processes, and implementation of core functions of the shim IPCP over UDP. Updates to the build system to compile these IPC processes, as well as some fixes in the irmd (rudimentary capturing exit signals) and some fixes in the library, mainly relating to the messaging. Basic implementation of creation / bootstrapping / deletion of the shim UDP. Placeholders for other functions. --- src/ipcpd/shim-udp/main.c | 323 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 323 insertions(+) create mode 100644 src/ipcpd/shim-udp/main.c (limited to 'src/ipcpd/shim-udp/main.c') diff --git a/src/ipcpd/shim-udp/main.c b/src/ipcpd/shim-udp/main.c new file mode 100644 index 00000000..1fb12dc0 --- /dev/null +++ b/src/ipcpd/shim-udp/main.c @@ -0,0 +1,323 @@ +/* + * Ouroboros - Copyright (C) 2016 + * + * Shim IPC process over UDP + * + * Dimitri Staessens + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include + +#include "ipcp.h" +#include +#include +#include +#include +#include +#include + +#define OUROBOROS_PREFIX "ipcpd/shim-udp" + +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +#define THIS_TYPE IPCP_SHIM_UDP + +#define shim_data(type) ((struct ipcp_udp_data *) type->data) + +/* global for trapping signal */ +int irmd_pid; + +/* this IPCP's data */ +#ifdef MAKE_CHECK +extern struct ipcp * _ipcp; /* defined in test */ +#else +struct ipcp * _ipcp; +#endif + +struct ipcp_udp_data { + /* IPCP_DATA STRUCT MUST BE FIRST!! */ + struct ipcp_data ipcp_data; + + uint32_t ip_addr; + uint32_t dns_addr; + + pthread_mutex_t lock; +}; + +struct udp_flow { + /* FLOW MUST BE FIRST !!!! */ + flow_t flow; + + uint16_t localport; + + struct sockaddr_in * remote; + int fd; +}; + +void ipcp_sig_handler(int sig, siginfo_t * info, void * c) +{ + switch(sig) { + case SIGINT: + case SIGTERM: + case SIGHUP: + LOG_DBG("Terminating by order of %d. Bye.", info->si_pid); + if (info->si_pid == irmd_pid) { + shm_du_map_close(_ipcp->data->dum); + exit(0); + } + default: + return; + } +} + +struct ipcp_udp_data * ipcp_udp_data_create(char * ap_name, + char * ap_id) +{ + struct ipcp_udp_data * udp_data; + struct ipcp_data * data; + instance_name_t * instance_name; + enum ipcp_type ipcp_type; + + instance_name = instance_name_create(); + if (instance_name == NULL) { + LOG_ERR("Failed to create instance name struct."); + return NULL; + } + + instance_name = instance_name_init_with( + instance_name, ap_name, (uint16_t)atoi(ap_id)); + + if (instance_name == NULL) { + LOG_ERR("Failed to create instance name struct."); + return NULL; + } + + udp_data= malloc (sizeof *udp_data); + if (udp_data == NULL) { + LOG_DBGF("Failed to allocate."); + return NULL; + } + + ipcp_type = THIS_TYPE; + data = (struct ipcp_data *) udp_data; + if (ipcp_data_init(data, instance_name, ipcp_type) == NULL) { + free(udp_data); + return NULL; + } + + return udp_data; +} + +int ipcp_udp_bootstrap(struct dif_config * conf) +{ + char ipstr[INET_ADDRSTRLEN]; + char dnsstr[INET_ADDRSTRLEN]; + + if (conf->type != THIS_TYPE) { + LOG_ERR("Config doesn't match IPCP type."); + return -1; + } + + if (_ipcp->state != IPCP_INIT) { + LOG_ERR("IPCP in wrong state."); + return -1; + } + + inet_ntop(AF_INET, + &conf->ip_addr, + ipstr, + INET_ADDRSTRLEN); + + if (conf->dns_addr != 0) + inet_ntop(AF_INET, + &conf->dns_addr, + dnsstr, + INET_ADDRSTRLEN); + else + strcpy(dnsstr, "not set"); + + shim_data(_ipcp)->ip_addr = conf->ip_addr; + shim_data(_ipcp)->dns_addr = conf->dns_addr; + + _ipcp->state = IPCP_ENROLLED; + + LOG_DBG("Bootstrapped shim IPCP over UDP %s-%d.", + _ipcp->data->iname->name, _ipcp->data->iname->id); + + LOG_DBG("Bound to IP address %s.", ipstr); + LOG_DBG("DNS server address is %s.", dnsstr); + + return 0; +} + +int ipcp_udp_ap_reg(char * ap_name, uint32_t reg_ap_id) +{ + LOG_DBG("Registering local ap %s, %u.", ap_name, reg_ap_id); + + if (_ipcp->state != IPCP_ENROLLED) { + LOG_DBGF("Won't register with non-enrolled IPCP."); + return -1; + } + + if (ipcp_data_add_reg_entry(_ipcp->data, ap_name, reg_ap_id)) { + LOG_ERR("Failed to add AP to local registry."); + return -1; + } + + LOG_MISSING; + + return 0; +} + +int ipcp_udp_ap_unreg(uint32_t reg_ap_id) +{ + char * name = strdup(ipcp_data_get_reg_ap_name(_ipcp->data, + reg_ap_id)); + LOG_DBG("Unregistering %s.", name); + + ipcp_data_del_reg_entry(_ipcp->data, reg_ap_id); + + /* we are using dns */ + LOG_MISSING; + + free (name); + + return 0; +} + +int ipcp_udp_flow_alloc(uint32_t port_id, + char * dst_ap_name, + char * src_ap_name, + char * src_ae_name, + struct qos_spec * qos) +{ + return 0; +} +int ipcp_udp_flow_alloc_resp(uint32_t port_id, + int result) +{ + return 0; +} + +int ipcp_udp_flow_dealloc(uint32_t port_id) +{ + return 0; +} + +int ipcp_udp_du_write(uint32_t port_id, + size_t map_index) +{ + return 0; +} + +int ipcp_udp_du_read(uint32_t port_id, + size_t map_index) +{ + return 0; +} + +struct ipcp * ipcp_udp_create(char * ap_name, char * i_id) +{ + struct ipcp * i; + struct ipcp_udp_data * data; + struct ipcp_ops * ops; + + i = malloc(sizeof *i); + if (i == NULL) + return NULL; + + data = ipcp_udp_data_create(ap_name, i_id); + if (data == NULL) { + free(i); + return NULL; + } + + ops = malloc (sizeof *ops); + if (ops == NULL) { + free(data); + free(i); + return NULL; + } + + ops->ipcp_bootstrap = ipcp_udp_bootstrap; + ops->ipcp_enroll = NULL; /* shim */ + ops->ipcp_reg = NULL; /* shim */ + ops->ipcp_unreg = NULL; /* shim */ + ops->ipcp_ap_reg = ipcp_udp_ap_reg; + ops->ipcp_ap_unreg = ipcp_udp_ap_unreg; + ops->ipcp_flow_alloc = ipcp_udp_flow_alloc; + ops->ipcp_flow_alloc_resp = ipcp_udp_flow_alloc_resp; + ops->ipcp_flow_dealloc = ipcp_udp_flow_dealloc; + ops->ipcp_du_read = ipcp_udp_du_read; + ops->ipcp_du_write = ipcp_udp_du_write; + + i->data = (struct ipcp_data *) data; + i->ops = ops; + + i->state = IPCP_INIT; + + return i; +} + +#ifndef MAKE_CHECK + +int main (int argc, char * argv[]) +{ + /* argument 1: pid of irmd ? */ + /* argument 2: ap name */ + /* argument 3: instance id */ + struct sigaction sig_act; + + /* FIXME: clean up argument checks */ + if (argc != 4) + LOG_ERR("Wrong arguments passed."); + + /* store the process id of the irmd */ + irmd_pid = atoi(argv[1]); + + /* init sig_act */ + memset (&sig_act, 0, sizeof sig_act); + + /* install signal traps */ + sig_act.sa_sigaction = &ipcp_sig_handler; + sig_act.sa_flags = SA_SIGINFO; + + sigaction(SIGINT, &sig_act, NULL); + sigaction(SIGTERM, &sig_act, NULL); + sigaction(SIGHUP, &sig_act, NULL); + + _ipcp = ipcp_udp_create(argv[2], argv[3]); + if (_ipcp == NULL) { + LOG_ERR("Won't."); + exit(1); + } + + ipcp_main_loop(_ipcp); + + exit(0); +} + +#endif /* MAKE_CHECK */ -- cgit v1.2.3