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/*
* Ouroboros - Copyright (C) 2016
*
* The IPC Resource Manager
*
* Sander Vrijders <sander.vrijders@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.
*/
#define OUROBOROS_PREFIX "irmd"
#include <ouroboros/logs.h>
#include <ouroboros/common.h>
#include <ouroboros/sockets.h>
#include <ouroboros/irm.h>
#include <ouroboros/ipcp.h>
#include <ouroboros/da.h>
#include <ouroboros/list.h>
#include <ouroboros/instance_name.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <stdlib.h>
#include <errno.h>
struct name_to_pid_entry {
struct list_head next;
pid_t pid;
instance_name_t * api;
};
struct irm {
struct list_head name_to_pid;
};
static pid_t find_pid_by_name(struct irm * instance,
instance_name_t * api)
{
struct list_head * pos;
list_for_each(pos, &instance->name_to_pid) {
struct name_to_pid_entry * tmp =
list_entry(pos, struct name_to_pid_entry, next);
LOG_DBG("name is %s", api->name);
if (instance_name_cmp(api, tmp->api) == 0)
return tmp->pid;
}
return 0;
}
static void create_ipcp(struct irm * instance,
instance_name_t * api,
char * ipcp_type)
{
pid_t pid;
struct name_to_pid_entry * tmp;
pid = ipcp_create(api, ipcp_type);
if (pid == -1) {
LOG_ERR("Failed to create IPCP");
return;
}
tmp = malloc(sizeof(*tmp));
if (tmp == NULL)
return;
INIT_LIST_HEAD(&tmp->next);
tmp->pid = pid;
tmp->api = instance_name_dup(api);
if (tmp->api == NULL) {
free(tmp);
return;
}
LOG_DBG("Created IPC process with pid %d", pid);
list_add(&tmp->next, &instance->name_to_pid);
}
static void destroy_ipcp(struct irm * instance,
instance_name_t * api)
{
pid_t pid = 0;
struct list_head * pos;
struct list_head * n;
pid = find_pid_by_name(instance, api);
if (pid == 0) {
LOG_ERR("No such IPCP");
return;
}
LOG_DBG("Destroying ipcp with pid %d", pid);
if (ipcp_destroy(pid))
LOG_ERR("Could not destroy IPCP");
list_for_each_safe(pos, n, &(instance->name_to_pid)) {
struct name_to_pid_entry * tmp =
list_entry(pos, struct name_to_pid_entry, next);
if (instance_name_cmp(api, tmp->api) == 0)
list_del(&tmp->next);
}
}
static void bootstrap_ipcp(struct irm * instance,
instance_name_t * api,
struct dif_config * conf)
{
pid_t pid = 0;
pid = find_pid_by_name(instance, api);
if (pid == 0) {
LOG_ERR("No such IPCP");
return;
}
if (ipcp_bootstrap(pid, conf))
LOG_ERR("Could not bootstrap IPCP");
}
static void enroll_ipcp(struct irm * instance,
instance_name_t * api,
char * dif_name)
{
pid_t pid = 0;
char * member;
char ** n_1_difs = NULL;
ssize_t n_1_difs_size = 0;
pid = find_pid_by_name(instance, api);
if (pid == 0) {
LOG_ERR("No such IPCP");
return;
}
member = da_resolve_daf(dif_name);
if (member == NULL) {
LOG_ERR("Could not find a member of that DIF");
return;
}
n_1_difs_size = da_resolve_dap(member, n_1_difs);
if (n_1_difs_size != 0)
if (ipcp_enroll(pid, dif_name, member,
n_1_difs, n_1_difs_size))
LOG_ERR("Could not enroll IPCP");
}
static void reg_ipcp(struct irm * instance,
instance_name_t * api,
char ** difs,
size_t difs_size)
{
pid_t pid = 0;
pid = find_pid_by_name(instance, api);
if (pid == 0) {
LOG_ERR("No such IPCP");
return;
}
if (ipcp_reg(pid, difs, difs_size))
LOG_ERR("Could not register IPCP to N-1 DIF(s)");
}
static void unreg_ipcp(struct irm * instance,
instance_name_t * api,
char ** difs,
size_t difs_size)
{
pid_t pid = 0;
pid = find_pid_by_name(instance, api);
if (pid == 0) {
LOG_ERR("No such IPCP");
return;
}
if (ipcp_unreg(pid, difs, difs_size))
LOG_ERR("Could not unregister IPCP from N-1 DIF(s)");
}
/* FIXME: Close sockfd on closing and release irm */
int main()
{
struct irm * instance = NULL;
int sockfd;
uint8_t buf[IRM_MSG_BUF_SIZE];
instance = malloc(sizeof(*instance));
if (instance == NULL)
return -1;
INIT_LIST_HEAD(&instance->name_to_pid);
sockfd = server_socket_open(IRM_SOCK_PATH);
if (sockfd < 0)
return -1;
while (true) {
int cli_sockfd;
irm_msg_t * msg;
ssize_t count;
instance_name_t api;
cli_sockfd = accept(sockfd, 0, 0);
if (cli_sockfd < 0) {
LOG_ERR("Cannot accept new connection");
continue;
}
count = read(cli_sockfd, buf, IRM_MSG_BUF_SIZE);
if (count > 0) {
msg = irm_msg__unpack(NULL, count, buf);
if (msg == NULL)
continue;
api.name = msg->ap_name;
api.id = msg->api_id;
switch (msg->code) {
case IRM_MSG_CODE__IRM_CREATE_IPCP:
create_ipcp(instance, &api, msg->ipcp_type);
break;
case IRM_MSG_CODE__IRM_DESTROY_IPCP:
destroy_ipcp(instance, &api);
break;
case IRM_MSG_CODE__IRM_BOOTSTRAP_IPCP:
bootstrap_ipcp(instance, &api, NULL);
break;
case IRM_MSG_CODE__IRM_ENROLL_IPCP:
if (msg->n_dif_name != 1)
continue;
enroll_ipcp(instance, &api, msg->dif_name[0]);
break;
case IRM_MSG_CODE__IRM_REG_IPCP:
reg_ipcp(instance, &api,
msg->dif_name,
msg->n_dif_name);
break;
case IRM_MSG_CODE__IRM_UNREG_IPCP:
unreg_ipcp(instance, &api,
msg->dif_name,
msg->n_dif_name);
break;
default:
LOG_ERR("Don't know that message code");
break;
}
irm_msg__free_unpacked(msg, NULL);
}
close(cli_sockfd);
}
return 0;
}
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