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/*
* Ouroboros - Copyright (C) 2016 - 2023
*
* The API to instruct IPCPs
*
* Dimitri Staessens <dimitri@ouroboros.rocks>
* Sander Vrijders <sander@ouroboros.rocks>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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., http://www.fsf.org/about/contact/.
*/
#define _POSIX_C_SOURCE 200112L
#include "config.h"
#define OUROBOROS_PREFIX "irmd/ipcp"
#include <ouroboros/logs.h>
#include <ouroboros/errno.h>
#include <ouroboros/utils.h>
#include <ouroboros/sockets.h>
#include "ipcp.h"
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <stdbool.h>
#include <pthread.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <spawn.h>
ipcp_msg_t * send_recv_ipcp_msg(pid_t pid,
ipcp_msg_t * msg)
{
int sockfd = 0;
uint8_t buf[SOCK_BUF_SIZE];
char * sock_path = NULL;
ssize_t len;
ipcp_msg_t * recv_msg = NULL;
struct timeval tv;
if (kill(pid, 0) < 0)
return NULL;
sock_path = ipcp_sock_path(pid);
if (sock_path == NULL)
return NULL;
sockfd = client_socket_open(sock_path);
if (sockfd < 0) {
free(sock_path);
return NULL;
}
free(sock_path);
len = ipcp_msg__get_packed_size(msg);
if (len == 0) {
close(sockfd);
return NULL;
}
switch (msg->code) {
case IPCP_MSG_CODE__IPCP_BOOTSTRAP:
tv.tv_sec = BOOTSTRAP_TIMEOUT / 1000;
tv.tv_usec = (BOOTSTRAP_TIMEOUT % 1000) * 1000;
break;
case IPCP_MSG_CODE__IPCP_ENROLL:
tv.tv_sec = ENROLL_TIMEOUT / 1000;
tv.tv_usec = (ENROLL_TIMEOUT % 1000) * 1000;
break;
case IPCP_MSG_CODE__IPCP_REG:
tv.tv_sec = REG_TIMEOUT / 1000;
tv.tv_usec = (REG_TIMEOUT % 1000) * 1000;
break;
case IPCP_MSG_CODE__IPCP_QUERY:
tv.tv_sec = QUERY_TIMEOUT / 1000;
tv.tv_usec = (QUERY_TIMEOUT % 1000) * 1000;
break;
case IPCP_MSG_CODE__IPCP_CONNECT:
tv.tv_sec = CONNECT_TIMEOUT / 1000;
tv.tv_usec = (CONNECT_TIMEOUT % 1000) * 1000;
break;
default:
tv.tv_sec = SOCKET_TIMEOUT / 1000;
tv.tv_usec = (SOCKET_TIMEOUT % 1000) * 1000;
break;
}
if (setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO,
(void *) &tv, sizeof(tv)))
log_warn("Failed to set timeout on socket.");
pthread_cleanup_push(__cleanup_close_ptr, (void *) &sockfd);
ipcp_msg__pack(msg, buf);
if (write(sockfd, buf, len) != -1)
len = read(sockfd, buf, SOCK_BUF_SIZE);
if (len > 0)
recv_msg = ipcp_msg__unpack(NULL, len, buf);
pthread_cleanup_pop(true);
return recv_msg;
}
pid_t ipcp_create(const char * name,
enum ipcp_type ipcp_type)
{
pid_t pid = -1;
char * ipcp_dir = "/sbin/";
char * exec_name = NULL;
char irmd_pid[10];
char full_name[256];
char * argv[5];
switch(ipcp_type) {
case IPCP_UNICAST:
exec_name = IPCP_UNICAST_EXEC;
break;
case IPCP_BROADCAST:
exec_name = IPCP_BROADCAST_EXEC;
break;
case IPCP_UDP:
exec_name = IPCP_UDP_EXEC;
break;
case IPCP_ETH_LLC:
exec_name = IPCP_ETH_LLC_EXEC;
break;
case IPCP_ETH_DIX:
exec_name = IPCP_ETH_DIX_EXEC;
break;
case IPCP_LOCAL:
exec_name = IPCP_LOCAL_EXEC;
break;
default:
return -1;
}
if (strlen(exec_name) == 0) {
log_err("IPCP type not installed.");
return -1;
}
sprintf(irmd_pid, "%u", getpid());
strcpy(full_name, INSTALL_PREFIX);
strcat(full_name, ipcp_dir);
strcat(full_name, exec_name);
/* log_file to be placed at the end */
argv[0] = full_name;
argv[1] = irmd_pid;
argv[2] = (char *) name;
if (log_syslog)
argv[3] = "1";
else
argv[3] = NULL;
argv[4] = NULL;
if (posix_spawn(&pid, argv[0], NULL, NULL, argv, NULL) != 0) {
log_err("Failed to spawn new process");
return -1;
}
return pid;
}
int ipcp_destroy(pid_t pid)
{
if (kill(pid, SIGTERM)) {
log_err("Failed to destroy IPCP");
return -1;
}
return 0;
}
int ipcp_bootstrap(pid_t pid,
struct ipcp_config * conf,
struct layer_info * info)
{
ipcp_msg_t msg = IPCP_MSG__INIT;
ipcp_msg_t * recv_msg = NULL;
int ret = -1;
if (conf == NULL)
return -EINVAL;
msg.code = IPCP_MSG_CODE__IPCP_BOOTSTRAP;
msg.conf = ipcp_config_s_to_msg(conf);
recv_msg = send_recv_ipcp_msg(pid, &msg);
ipcp_config_msg__free_unpacked(msg.conf, NULL);
if (recv_msg == NULL)
return -EIPCP;
if (!recv_msg->has_result) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return -EIPCP;
}
ret = recv_msg->result;
if (ret != 0) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return ret;
}
if (recv_msg->layer_info == NULL) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return -EIPCP;
}
info->dir_hash_algo = recv_msg->layer_info->dir_hash_algo;
strcpy(info->layer_name, recv_msg->layer_info->layer_name);
ret = recv_msg->result;
ipcp_msg__free_unpacked(recv_msg, NULL);
return ret;
}
int ipcp_enroll(pid_t pid,
const char * dst,
struct layer_info * info)
{
ipcp_msg_t msg = IPCP_MSG__INIT;
ipcp_msg_t * recv_msg = NULL;
int ret = -1;
if (dst == NULL)
return -EINVAL;
msg.code = IPCP_MSG_CODE__IPCP_ENROLL;
msg.dst = (char *) dst;
recv_msg = send_recv_ipcp_msg(pid, &msg);
if (recv_msg == NULL)
return -EIPCP;
if (!recv_msg->has_result) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return -EIPCP;
}
ret = recv_msg->result;
if (ret != 0) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return ret;
}
if (recv_msg->layer_info == NULL) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return -EIPCP;
}
info->dir_hash_algo = recv_msg->layer_info->dir_hash_algo;
strcpy(info->layer_name, recv_msg->layer_info->layer_name);
ipcp_msg__free_unpacked(recv_msg, NULL);
return 0;
}
int ipcp_connect(pid_t pid,
const char * dst,
const char * component,
qosspec_t qs)
{
ipcp_msg_t msg = IPCP_MSG__INIT;
int ret = -1;
ipcp_msg_t * recv_msg;
msg.code = IPCP_MSG_CODE__IPCP_CONNECT;
msg.dst = (char *) dst;
msg.comp = (char *) component;
msg.has_pid = true;
msg.pid = pid;
msg.qosspec = qos_spec_s_to_msg(&qs);
recv_msg = send_recv_ipcp_msg(pid, &msg);
free(msg.qosspec);
if (recv_msg == NULL)
return -EIPCP;
if (!recv_msg->has_result) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return -EIPCP;
}
ret = recv_msg->result;
ipcp_msg__free_unpacked(recv_msg, NULL);
return ret;
}
int ipcp_disconnect(pid_t pid,
const char * dst,
const char * component)
{
ipcp_msg_t msg = IPCP_MSG__INIT;
ipcp_msg_t * recv_msg = NULL;
int ret = -1;
msg.code = IPCP_MSG_CODE__IPCP_DISCONNECT;
msg.dst = (char *) dst;
msg.comp = (char *) component;
msg.has_pid = true;
msg.pid = pid;
recv_msg = send_recv_ipcp_msg(pid, &msg);
if (recv_msg == NULL)
return -EIPCP;
if (!recv_msg->has_result) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return -EIPCP;
}
ret = recv_msg->result;
ipcp_msg__free_unpacked(recv_msg, NULL);
return ret;
}
int ipcp_reg(pid_t pid,
const uint8_t * hash,
size_t len)
{
ipcp_msg_t msg = IPCP_MSG__INIT;
ipcp_msg_t * recv_msg = NULL;
int ret = -1;
assert(hash);
msg.code = IPCP_MSG_CODE__IPCP_REG;
msg.has_hash = true;
msg.hash.len = len;
msg.hash.data = (uint8_t *)hash;
recv_msg = send_recv_ipcp_msg(pid, &msg);
if (recv_msg == NULL)
return -EIPCP;
if (!recv_msg->has_result) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return -EIPCP;
}
ret = recv_msg->result;
ipcp_msg__free_unpacked(recv_msg, NULL);
return ret;
}
int ipcp_unreg(pid_t pid,
const uint8_t * hash,
size_t len)
{
ipcp_msg_t msg = IPCP_MSG__INIT;
ipcp_msg_t * recv_msg = NULL;
int ret = -1;
msg.code = IPCP_MSG_CODE__IPCP_UNREG;
msg.has_hash = true;
msg.hash.len = len;
msg.hash.data = (uint8_t *) hash;
recv_msg = send_recv_ipcp_msg(pid, &msg);
if (recv_msg == NULL)
return -EIPCP;
if (!recv_msg->has_result) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return -EIPCP;
}
ret = recv_msg->result;
ipcp_msg__free_unpacked(recv_msg, NULL);
return ret;
}
int ipcp_query(pid_t pid,
const uint8_t * hash,
size_t len)
{
ipcp_msg_t msg = IPCP_MSG__INIT;
ipcp_msg_t * recv_msg = NULL;
int ret = -1;
msg.code = IPCP_MSG_CODE__IPCP_QUERY;
msg.has_hash = true;
msg.hash.len = len;
msg.hash.data = (uint8_t *) hash;
recv_msg = send_recv_ipcp_msg(pid, &msg);
if (recv_msg == NULL)
return -EIPCP;
if (!recv_msg->has_result) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return -EIPCP;
}
ret = recv_msg->result;
ipcp_msg__free_unpacked(recv_msg, NULL);
return ret;
}
static int __ipcp_flow_alloc(pid_t pid,
int flow_id,
pid_t n_pid,
const uint8_t * dst,
size_t len,
qosspec_t qs,
bool join,
const buffer_t data)
{
ipcp_msg_t msg = IPCP_MSG__INIT;
ipcp_msg_t * recv_msg = NULL;
int ret = -1;
assert(dst);
msg.code = join ? IPCP_MSG_CODE__IPCP_FLOW_JOIN
: IPCP_MSG_CODE__IPCP_FLOW_ALLOC;
msg.has_flow_id = true;
msg.flow_id = flow_id;
msg.has_pid = true;
msg.pid = n_pid;
msg.has_hash = true;
msg.hash.len = len;
msg.hash.data = (uint8_t *) dst;
msg.qosspec = qos_spec_s_to_msg(&qs);;
msg.has_pk = true;
msg.pk.data = data.data;
msg.pk.len = data.len;
recv_msg = send_recv_ipcp_msg(pid, &msg);
free(msg.qosspec);
if (recv_msg == NULL)
return -EIPCP;
if (!recv_msg->has_result) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return -EIPCP;
}
ret = recv_msg->result;
ipcp_msg__free_unpacked(recv_msg, NULL);
return ret;
}
int ipcp_flow_alloc(pid_t pid,
int flow_id,
pid_t n_pid,
const uint8_t * dst,
size_t len,
qosspec_t qs,
const buffer_t data)
{
return __ipcp_flow_alloc(pid, flow_id, n_pid, dst,
len, qs, false, data);
}
int ipcp_flow_join(pid_t pid,
int flow_id,
pid_t n_pid,
const uint8_t * dst,
size_t len,
qosspec_t qs)
{
buffer_t data = {NULL, 0};
return __ipcp_flow_alloc(pid, flow_id, n_pid, dst,
len, qs, true, data);
}
int ipcp_flow_alloc_resp(pid_t pid,
int flow_id,
pid_t n_pid,
int response,
const buffer_t data)
{
ipcp_msg_t msg = IPCP_MSG__INIT;
ipcp_msg_t * recv_msg = NULL;
int ret = -1;
msg.code = IPCP_MSG_CODE__IPCP_FLOW_ALLOC_RESP;
msg.has_flow_id = true;
msg.flow_id = flow_id;
msg.has_pid = true;
msg.pid = n_pid;
msg.has_response = true;
msg.response = response;
msg.has_pk = true;
msg.pk.data = data.data;
msg.pk.len = data.len;
recv_msg = send_recv_ipcp_msg(pid, &msg);
if (recv_msg == NULL)
return -EIPCP;
if (!recv_msg->has_result) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return -EIPCP;
}
ret = recv_msg->result;
ipcp_msg__free_unpacked(recv_msg, NULL);
return ret;
}
int ipcp_flow_dealloc(pid_t pid,
int flow_id,
time_t timeo)
{
ipcp_msg_t msg = IPCP_MSG__INIT;
ipcp_msg_t * recv_msg = NULL;
int ret = -1;
msg.code = IPCP_MSG_CODE__IPCP_FLOW_DEALLOC;
msg.has_flow_id = true;
msg.flow_id = flow_id;
msg.has_timeo_sec = true;
msg.timeo_sec = timeo;
recv_msg = send_recv_ipcp_msg(pid, &msg);
if (recv_msg == NULL)
return 0;
if (!recv_msg->has_result) {
ipcp_msg__free_unpacked(recv_msg, NULL);
return 0;
}
ret = recv_msg->result;
ipcp_msg__free_unpacked(recv_msg, NULL);
return ret;
}
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