Merged in dstaesse/ouroboros/ipcpd-udp (pull request #57)

ipcpd: initial IPC processes

1 files changed, 324 insertions, 0 deletions

diff --git a/src/ipcpd/shim-udp/main.c b/src/ipcpd/shim-udp/main.c
new file mode 100644
index 00000000..45620ee9
--- /dev/null
+++ b/src/ipcpd/shim-udp/main.c
@@ -0,0 +1,324 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Shim IPC process over UDP
+ *
+ *    Dimitri Staessens <[email protected]>
+ *
+ * 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 <ouroboros/config.h>
+
+#include "ipcp.h"
+#include <ouroboros/shm_du_map.h>
+#include <ouroboros/list.h>
+#include <ouroboros/flow.h>
+#include <ouroboros/utils.h>
+#include <ouroboros/ipcp.h>
+#include <ouroboros/dif_config.h>
+
+#define OUROBOROS_PREFIX "ipcpd/shim-udp"
+
+#include <ouroboros/logs.h>
+
+#include <string.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+#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;
+
+        if (ipcp_arg_check(argc, argv)) {
+                LOG_ERR("Wrong arguments.");
+                exit(1);
+        }
+
+        /* 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 */