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/*
* Ouroboros - Copyright (C) 2016
*
* IPC process main loop
*
* Dimitri Staessens <dimitri.staessens@intec.ugent.be>
*
* 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 <ouroboros/ipcp.h>
#define OUROBOROS_PREFIX "ipcpd/ipcp"
#include <ouroboros/logs.h>
#include <string.h>
#include <sys/socket.h>
#include <stdlib.h>
#include "ipcp.h"
struct ipcp * ipcp_instance_create()
{
struct ipcp * i = malloc(sizeof *i);
if (i == NULL)
return NULL;
i->data = NULL;
i->ops = NULL;
i->irmd_fd = -1;
i->state = IPCP_INIT;
pthread_mutex_init(&i->state_lock, NULL);
pthread_cond_init(&i->state_cond, NULL);
return i;
}
void ipcp_state_change(struct ipcp * ipcp,
enum ipcp_state state)
{
if (ipcp == NULL)
return;
ipcp->state = state;
pthread_cond_broadcast(&ipcp->state_cond);
}
int ipcp_parse_arg(int argc, char * argv[])
{
char * log_file;
size_t len = 0;
if (!(argc == 3 || argc == 2))
return -1;
/* argument 1: api of irmd */
if (atoi(argv[1]) == 0)
return -1;
if (argv[2] == NULL)
return 0;
len += strlen(INSTALL_PREFIX);
len += strlen(LOG_DIR);
len += strlen(argv[2]);
log_file = malloc(len + 1);
if (log_file == NULL) {
LOG_ERR("Failed to malloc");
return -1;
}
strcpy(log_file, INSTALL_PREFIX);
strcat(log_file, LOG_DIR);
strcat(log_file, argv[2]);
log_file[len] = '\0';
if (set_logfile(log_file))
LOG_ERR("Cannot open %s, falling back to stdout for logs.",
log_file);
free(log_file);
return 0;
}
static void close_ptr(void * o)
{
close(*((int *) o));
}
static void clean_msg(void * msg)
{
ipcp_msg__free_unpacked(msg, NULL);
}
void * ipcp_main_loop(void * o)
{
int lsockfd;
int sockfd;
uint8_t buf[IPCP_MSG_BUF_SIZE];
struct ipcp * _ipcp = (struct ipcp *) o;
ipcp_msg_t * msg;
ssize_t count;
buffer_t buffer;
ipcp_msg_t ret_msg = IPCP_MSG__INIT;
dif_config_msg_t * conf_msg;
struct dif_config conf;
char * sock_path;
struct timeval tv = {(SOCKET_TIMEOUT / 1000),
(SOCKET_TIMEOUT % 1000) * 1000};
if (_ipcp == NULL) {
LOG_ERR("Invalid ipcp struct.");
return (void *) 1;
}
sock_path = ipcp_sock_path(getpid());
if (sock_path == NULL)
return (void *) 1;
sockfd = server_socket_open(sock_path);
if (sockfd < 0) {
LOG_ERR("Could not open server socket.");
return (void *) 1;
}
free(sock_path);
pthread_cleanup_push(close_ptr, (void *) &sockfd);
while (true) {
ret_msg.code = IPCP_MSG_CODE__IPCP_REPLY;
lsockfd = accept(sockfd, 0, 0);
if (lsockfd < 0) {
LOG_ERR("Cannot accept new connection");
break;
}
if (setsockopt(lsockfd, SOL_SOCKET, SO_RCVTIMEO,
(void *) &tv, sizeof(tv)))
LOG_WARN("Failed to set timeout on socket.");
pthread_cleanup_push(close_ptr, (void *) &lsockfd);
count = read(lsockfd, buf, IPCP_MSG_BUF_SIZE);
if (count <= 0) {
LOG_ERR("Failed to read from socket");
close(lsockfd);
continue;
}
msg = ipcp_msg__unpack(NULL, count, buf);
if (msg == NULL) {
close(lsockfd);
continue;
}
pthread_cleanup_push(clean_msg, (void *) msg);
switch (msg->code) {
case IPCP_MSG_CODE__IPCP_BOOTSTRAP:
if (_ipcp->ops->ipcp_bootstrap == NULL) {
LOG_ERR("Bootstrap unsupported.");
break;
}
conf_msg = msg->conf;
conf.type = conf_msg->ipcp_type;
conf.dif_name = conf_msg->dif_name;
if (conf_msg->ipcp_type == IPCP_NORMAL) {
conf.addr_size = conf_msg->addr_size;
conf.cep_id_size = conf_msg->cep_id_size;
conf.pdu_length_size
= conf_msg->pdu_length_size;
conf.qos_id_size = conf_msg->qos_id_size;
conf.seqno_size = conf_msg->seqno_size;
conf.ttl_size = conf_msg->seqno_size;
conf.chk_size = conf_msg->chk_size;
conf.min_pdu_size = conf_msg->min_pdu_size;
conf.max_pdu_size = conf_msg->max_pdu_size;
}
if (conf_msg->ipcp_type == IPCP_SHIM_UDP) {
conf.ip_addr = conf_msg->ip_addr;
conf.dns_addr = conf_msg->dns_addr;
}
if (conf_msg->ipcp_type == IPCP_SHIM_ETH_LLC)
conf.if_name = conf_msg->if_name;
ret_msg.has_result = true;
ret_msg.result = _ipcp->ops->ipcp_bootstrap(&conf);
break;
case IPCP_MSG_CODE__IPCP_ENROLL:
if (_ipcp->ops->ipcp_enroll == NULL) {
LOG_ERR("Enroll unsupported.");
break;
}
ret_msg.has_result = true;
ret_msg.result = _ipcp->ops->ipcp_enroll(msg->dif_name);
break;
case IPCP_MSG_CODE__IPCP_NAME_REG:
if (_ipcp->ops->ipcp_name_reg == NULL) {
LOG_ERR("Ap_reg unsupported.");
break;
}
ret_msg.has_result = true;
ret_msg.result =
_ipcp->ops->ipcp_name_reg(strdup(msg->name));
break;
case IPCP_MSG_CODE__IPCP_NAME_UNREG:
if (_ipcp->ops->ipcp_name_unreg == NULL) {
LOG_ERR("Ap_unreg unsupported.");
break;
}
ret_msg.has_result = true;
ret_msg.result =
_ipcp->ops->ipcp_name_unreg(msg->name);
break;
case IPCP_MSG_CODE__IPCP_FLOW_ALLOC:
if (_ipcp->ops->ipcp_flow_alloc == NULL) {
LOG_ERR("Flow_alloc unsupported.");
break;
}
ret_msg.has_result = true;
ret_msg.result =
_ipcp->ops->ipcp_flow_alloc(msg->api,
msg->port_id,
msg->dst_name,
msg->src_ae_name,
msg->qos_cube);
break;
case IPCP_MSG_CODE__IPCP_FLOW_ALLOC_RESP:
if (_ipcp->ops->ipcp_flow_alloc_resp == NULL) {
LOG_ERR("Flow_alloc_resp unsupported.");
break;
}
ret_msg.has_result = true;
ret_msg.result =
_ipcp->ops->ipcp_flow_alloc_resp(msg->api,
msg->port_id,
msg->result);
break;
case IPCP_MSG_CODE__IPCP_FLOW_DEALLOC:
if (_ipcp->ops->ipcp_flow_dealloc == NULL) {
LOG_ERR("Flow_dealloc unsupported.");
break;
}
ret_msg.has_result = true;
ret_msg.result =
_ipcp->ops->ipcp_flow_dealloc(msg->port_id);
break;
default:
LOG_ERR("Don't know that message code");
break;
}
pthread_cleanup_pop(true);
pthread_cleanup_pop(false);
buffer.len = ipcp_msg__get_packed_size(&ret_msg);
if (buffer.len == 0) {
LOG_ERR("Failed to send reply message");
close(lsockfd);
continue;
}
buffer.data = malloc(buffer.len);
if (buffer.data == NULL) {
close(lsockfd);
continue;
}
ipcp_msg__pack(&ret_msg, buffer.data);
if (write(lsockfd, buffer.data, buffer.len) == -1) {
free(buffer.data);
close(lsockfd);
continue;
}
free(buffer.data);
close(lsockfd);
}
pthread_cleanup_pop(true);
return NULL;
}
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