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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>
#include <sys/socket.h>
#include <stdlib.h>
#include "ipcp.h"
#define OUROBOROS_PREFIX "ipcpd/ipcp"
#include <ouroboros/logs.h>
int ipcp_main_loop(struct ipcp * _ipcp)
{
int lsockfd;
int sockfd;
uint8_t buf[IPCP_MSG_BUF_SIZE];
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;
if (_ipcp == NULL) {
LOG_ERR("Invalid ipcp struct.");
return 1;
}
sockfd = server_socket_open(ipcp_sock_path(getpid()));
if (sockfd < 0) {
LOG_ERR("Could not open server socket.");
return 1;
}
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;
}
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;
}
switch (msg->code) {
case IPCP_MSG_CODE__IPCP_BOOTSTRAP:
conf_msg = msg->conf;
conf.type = conf_msg->ipcp_type;
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;
}
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("ipcp_enroll unsupported.");
} else {
ret_msg.has_result = true;
ret_msg.result = _ipcp->ops->ipcp_enroll(
msg->member_name, msg->n_1_dif);
}
break;
case IPCP_MSG_CODE__IPCP_REG:
if (_ipcp->ops->ipcp_reg == NULL) {
LOG_ERR("ipcp_reg unsupported.");
} else {
ret_msg.has_result = true;
ret_msg.result = _ipcp->ops->ipcp_reg(
msg->dif_names, msg->len);
}
break;
case IPCP_MSG_CODE__IPCP_UNREG:
if (_ipcp->ops->ipcp_unreg == NULL) {
LOG_ERR("ipcp_unreg unsupported.");
} else {
ret_msg.has_result = true;
ret_msg.result = _ipcp->ops->ipcp_unreg(
msg->dif_names, msg->len);
}
break;
case IPCP_MSG_CODE__IPCP_AP_REG:
ret_msg.has_result = true;
ret_msg.result = _ipcp->ops->ipcp_ap_reg(
msg->ap_name, msg->reg_ap_id);
break;
case IPCP_MSG_CODE__IPCP_AP_UNREG:
ret_msg.has_result = true;
ret_msg.result = _ipcp->ops->ipcp_ap_unreg(
msg->reg_ap_id);
break;
case IPCP_MSG_CODE__IPCP_FLOW_ALLOC:
ret_msg.has_result = true;
ret_msg.result = _ipcp->ops->ipcp_flow_alloc(
msg->port_id,
msg->dst_ap_name,
msg->ap_name,
msg->ae_name,
NULL);
break;
case IPCP_MSG_CODE__IPCP_FLOW_ALLOC_RESP:
ret_msg.has_result = true;
ret_msg.result = _ipcp->ops->ipcp_flow_alloc_resp(
msg->port_id, msg->result);
break;
case IPCP_MSG_CODE__IPCP_FLOW_DEALLOC:
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;
}
ipcp_msg__free_unpacked(msg, NULL);
buffer.size = ipcp_msg__get_packed_size(&ret_msg);
if (buffer.size == 0) {
LOG_ERR("Failed to send reply message");
close(lsockfd);
continue;
}
buffer.data = malloc(buffer.size);
if (buffer.data == NULL) {
close(lsockfd);
continue;
}
ipcp_msg__pack(&ret_msg, buffer.data);
if (write(lsockfd, buffer.data, buffer.size) == -1) {
free(buffer.data);
close(lsockfd);
continue;
}
free(buffer.data);
close(lsockfd);
}
return 0;
}
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