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allow user identification in publisher

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This commit is contained in:
Dany LE 2021-10-27 15:42:02 +02:00
parent 9406c4d33e
commit 6a4682c571
3 changed files with 106 additions and 92 deletions
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2
configure.ac
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@ -1,5 +1,5 @@
# initialise autoconf and set up some basic information about the program we’re packaging
AC_INIT([tunnel], [0.1.0b], [xsang.le@gmail.com])
AC_INIT([tunnel], [0.1.1b], [xsang.le@gmail.com])
# We’re going to use automake for this project
# [subdir-objects] if needed

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dist/tunnel-0.1.1b.tar.gz vendored Normal file
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196
tunnel.c
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@ -19,17 +19,18 @@
#include <fcntl.h>
#include <sys/time.h>
#define MAX_CHANNEL_NAME 64
#define HOT_LINE_SOCKET "antd_hotline.sock"
#define KEY_CHAIN_FIFO "antunnel_keychain"
#define SOCK_DIR_NAME "channels"
#define COOKIE_NAME "sessionid"
#define MAX_CHANNEL_NAME 64
#define HOT_LINE_SOCKET "antd_hotline.sock"
#define KEY_CHAIN_FIFO "antunnel_keychain"
#define SOCK_DIR_NAME "channels"
#define COOKIE_NAME "sessionid"
#define MAX_CHANNEL_ID 65535u
#define KEY_LEN 40
#define MAX_SESSION_TIMEOUT (15u*60u) //15 min
#define PING_INTERVAL 10u // 10s
#define PROCESS_TIMEOUT 30000u //30 ms
#define MAX_CHANNEL_ID 65535u
#define KEY_LEN 40
#define USER_LEN 64
#define MAX_SESSION_TIMEOUT (15u * 60u) //15 min
#define PING_INTERVAL 10u // 10s
#define PROCESS_TIMEOUT 30000u //30 ms
#define MAX_CHANNEL_PATH (sizeof(__plugin__.tmpdir) + strlen(SOCK_DIR_NAME) + strlen(HOT_LINE_SOCKET) + 2)
@ -74,15 +75,18 @@ typedef struct
* |MSG TYPE(1)| CHANNEL ID (2)| CLIENT ID (2)| data(m) |
*/
typedef struct {
typedef struct
{
char hash[KEY_LEN + 1]; // sha1sum + terminal byte
char user[USER_LEN + 1];
time_t last_update;
} antd_tunnel_key_t;
} antd_tunnel_key_t;
typedef struct {
typedef struct
{
pthread_mutex_t lock;
bst_node_t* channels;
bst_node_t* keychain;
bst_node_t *channels;
bst_node_t *keychain;
pthread_t tid;
int hotline;
int key_fd;
@ -92,10 +96,10 @@ typedef struct {
static antd_tunnel_t g_tunnel;
static int mk_keychain_fifo(const char* name, char * path)
static int mk_keychain_fifo(const char *name, char *path)
{
// create the FIFO
(void)snprintf(path, MAX_CHANNEL_PATH,"%s/%s/%s",__plugin__.tmpdir, SOCK_DIR_NAME, name);
(void)snprintf(path, MAX_CHANNEL_PATH, "%s/%s/%s", __plugin__.tmpdir, SOCK_DIR_NAME, name);
(void)unlink(path);
if (mkfifo(path, 0666) == -1)
{
@ -112,7 +116,7 @@ static int mk_keychain_fifo(const char* name, char * path)
return fifo_fd;
}
static int mk_socket(const char* name, char* path)
static int mk_socket(const char *name, char *path)
{
struct sockaddr_un address;
address.sun_family = AF_UNIX;
@ -477,13 +481,14 @@ static void channel_close(antd_tunnel_channel_t *channel)
}
static void update_keychain(int listen_fd)
{
antd_tunnel_key_t* key_p = (antd_tunnel_key_t*) malloc(sizeof(antd_tunnel_key_t));
if(key_p == NULL)
antd_tunnel_key_t *key_p = (antd_tunnel_key_t *)malloc(sizeof(antd_tunnel_key_t));
if (key_p == NULL)
{
ERROR("Unable to allocate memory for key");
return;
}
(void)memset(key_p->hash, 0, KEY_LEN + 1);
(void)memset(key_p->user, 0, USER_LEN + 1);
int size;
if ((size = read(listen_fd, key_p->hash, KEY_LEN)) == -1)
{
@ -491,27 +496,33 @@ static void update_keychain(int listen_fd)
free(key_p);
return;
}
if(size != KEY_LEN)
if (size != KEY_LEN)
{
ERROR("Invalid key size %d", size);
free(key_p);
return;
}
if ((size = read(listen_fd, key_p->user, USER_LEN)) == -1)
{
ERROR("Unable to read user from keychain FIFO: %s", strerror(errno));
free(key_p);
return;
}
// looking for key in the keychain
int hash_val = simple_hash(key_p->hash);
pthread_mutex_lock(&g_tunnel.lock);
bst_node_t* node = bst_find(g_tunnel.keychain, hash_val);
if(node == NULL)
bst_node_t *node = bst_find(g_tunnel.keychain, hash_val);
if (node == NULL)
{
key_p->last_update = time(NULL);
g_tunnel.keychain = bst_insert(g_tunnel.keychain, hash_val, (void*) key_p);
LOG("New key added to the keychain (%d)", hash_val);
g_tunnel.keychain = bst_insert(g_tunnel.keychain, hash_val, (void *)key_p);
LOG("New key added to the keychain (%d) for user", hash_val, key_p->user);
}
else
{
antd_tunnel_key_t* existing_key = (antd_tunnel_key_t*)node->data;
antd_tunnel_key_t *existing_key = (antd_tunnel_key_t *)node->data;
existing_key->last_update = time(NULL);
LOG("Update existing key in the keychain");
LOG("Update existing key in the keychain for user %s", existing_key->user);
free(key_p);
}
pthread_mutex_unlock(&g_tunnel.lock);
@ -692,7 +703,7 @@ static void *multiplex(void *data_p)
FD_ZERO(&fd_in);
FD_SET(tunnel_p->hotline, &fd_in);
FD_SET(tunnel_p->key_fd, &fd_in);
max_fdm = tunnel_p->hotline > tunnel_p->key_fd? tunnel_p->hotline: tunnel_p->key_fd;
max_fdm = tunnel_p->hotline > tunnel_p->key_fd ? tunnel_p->hotline : tunnel_p->key_fd;
pthread_mutex_lock(&tunnel_p->lock);
args[0] = (void *)&fd_in;
args[1] = (void *)&max_fdm;
@ -700,36 +711,36 @@ static void *multiplex(void *data_p)
pthread_mutex_unlock(&tunnel_p->lock);
rc = select(max_fdm + 1, &fd_in, NULL, NULL, NULL);
switch (rc)
{
case -1:
LOG("Error %d on select()\n", errno);
status = 1;
break;
case 0:
break;
// we have data
default:
if(FD_ISSET(tunnel_p->hotline, &fd_in))
{
// LOG("Got new data on hotline");
monitor_hotline(tunnel_p->hotline);
}
if(FD_ISSET(tunnel_p->key_fd, &fd_in))
{
update_keychain(tunnel_p->key_fd);
}
pthread_mutex_lock(&tunnel_p->lock);
closed_channels = list_init();
args[0] = (void*) &fd_in;
args[1] = (void*) &closed_channels;
bst_for_each(tunnel_p->channels, handle_channel,args, 2);
list_for_each(item, closed_channels)
{
tunnel_p->channels = bst_delete(tunnel_p->channels, ((bst_node_t*)item->value.ptr)->key);
item->value.ptr = NULL;
}
list_free(&closed_channels);
pthread_mutex_unlock(&tunnel_p->lock);
{
case -1:
LOG("Error %d on select()\n", errno);
status = 1;
break;
case 0:
break;
// we have data
default:
if (FD_ISSET(tunnel_p->hotline, &fd_in))
{
// LOG("Got new data on hotline");
monitor_hotline(tunnel_p->hotline);
}
if (FD_ISSET(tunnel_p->key_fd, &fd_in))
{
update_keychain(tunnel_p->key_fd);
}
pthread_mutex_lock(&tunnel_p->lock);
closed_channels = list_init();
args[0] = (void *)&fd_in;
args[1] = (void *)&closed_channels;
bst_for_each(tunnel_p->channels, handle_channel, args, 2);
list_for_each(item, closed_channels)
{
tunnel_p->channels = bst_delete(tunnel_p->channels, ((bst_node_t *)item->value.ptr)->key);
item->value.ptr = NULL;
}
list_free(&closed_channels);
pthread_mutex_unlock(&tunnel_p->lock);
}
}
return NULL;
@ -747,13 +758,13 @@ void init()
g_tunnel.initialized = 0;
g_tunnel.keychain = NULL;
g_tunnel.key_fd = -1;
if((g_tunnel.hotline = mk_socket(HOT_LINE_SOCKET, path)) == -1)
if ((g_tunnel.hotline = mk_socket(HOT_LINE_SOCKET, path)) == -1)
{
ERROR("Unable to create hotline socket");
destroy();
return;
}
if((g_tunnel.key_fd = mk_keychain_fifo(KEY_CHAIN_FIFO, path)) == -1)
if ((g_tunnel.key_fd = mk_keychain_fifo(KEY_CHAIN_FIFO, path)) == -1)
{
ERROR("Unable to create keychain FIFO");
destroy();
@ -780,7 +791,7 @@ static void free_subscribers(bst_node_t *node, void **args, int argc)
void destroy()
{
char path[MAX_CHANNEL_PATH];
if(g_tunnel.initialized)
if (g_tunnel.initialized)
{
pthread_mutex_lock(&g_tunnel.lock);
bst_for_each(g_tunnel.channels, free_subscribers, NULL, 0);
@ -791,20 +802,20 @@ void destroy()
pthread_mutex_destroy(&g_tunnel.lock);
LOG("Antd tunnel is destroyed");
}
if(g_tunnel.hotline != -1)
if (g_tunnel.hotline != -1)
{
(void) close(g_tunnel.hotline);
(void) snprintf(path, BUFFLEN, "%s/%s/%s", __plugin__.tmpdir, SOCK_DIR_NAME, HOT_LINE_SOCKET);
(void) unlink(path);
(void)close(g_tunnel.hotline);
(void)snprintf(path, BUFFLEN, "%s/%s/%s", __plugin__.tmpdir, SOCK_DIR_NAME, HOT_LINE_SOCKET);
(void)unlink(path);
}
if(g_tunnel.key_fd != -1)
if (g_tunnel.key_fd != -1)
{
(void) close(g_tunnel.key_fd);
(void) snprintf(path, BUFFLEN, "%s/%s/%s", __plugin__.tmpdir, SOCK_DIR_NAME, KEY_CHAIN_FIFO);
(void) unlink(path);
(void)close(g_tunnel.key_fd);
(void)snprintf(path, BUFFLEN, "%s/%s/%s", __plugin__.tmpdir, SOCK_DIR_NAME, KEY_CHAIN_FIFO);
(void)unlink(path);
}
}
static void process_client_message(antd_tunnel_msg_t *msg, antd_client_t *client)
static void process_client_message(antd_tunnel_msg_t *msg, antd_client_t *client, antd_tunnel_key_t * key)
{
char buff[BUFFLEN + 1];
bst_node_t *node;
@ -886,6 +897,9 @@ static void process_client_message(antd_tunnel_msg_t *msg, antd_client_t *client
ERROR("Unable to send subscribe OK message to client");
}
msg->header.client_id = g_tunnel.id_allocator;
msg->header.size = strlen(key->user) + 1;
(void)memset(buff,0, BUFFLEN + 1);
(void)memcpy(buff, key->user, msg->header.size - 1);
msg->header.type = CHANNEL_SUBSCRIBE;
}
else
@ -986,15 +1000,15 @@ static void keychain_validating(bst_node_t *node, void **argv, int argc)
{
(void)argc;
list_t *list = (list_t *)argv[0];
antd_tunnel_key_t* key_p = NULL;
if(node == NULL || node->data == NULL)
antd_tunnel_key_t *key_p = NULL;
if (node == NULL || node->data == NULL)
{
return;
}
key_p = (antd_tunnel_key_t*) node->data;
if(difftime(time(NULL), key_p->last_update) > (double)MAX_SESSION_TIMEOUT)
key_p = (antd_tunnel_key_t *)node->data;
if (difftime(time(NULL), key_p->last_update) > (double)MAX_SESSION_TIMEOUT)
{
list_put_i(list,node->key);
list_put_i(list, node->key);
}
}
@ -1010,9 +1024,9 @@ void *handle(void *rq_data)
int status;
fd_set fd_in;
int offset;
bst_node_t * node = NULL;
antd_tunnel_key_t* key_p = NULL;
const char* ssid = NULL;
bst_node_t *node = NULL;
antd_tunnel_key_t *key_p = NULL;
const char *ssid = NULL;
dictionary_t cookie = NULL;
void *argv[1];
@ -1024,7 +1038,7 @@ void *handle(void *rq_data)
// update the keychain
list_t list = list_init();
argv[0] = (void*)&list;
argv[0] = (void *)&list;
pthread_mutex_lock(&g_tunnel.lock);
bst_for_each(g_tunnel.keychain, keychain_validating, argv, 1);
pthread_mutex_unlock(&g_tunnel.lock);
@ -1043,19 +1057,19 @@ void *handle(void *rq_data)
argv[0] = (void *)rq->client;
// verify if user is authorized
cookie = dvalue(rq->request, "COOKIE");
if(cookie != NULL)
if (cookie != NULL)
{
ssid = (const char*)dvalue(cookie, COOKIE_NAME);
ssid = (const char *)dvalue(cookie, COOKIE_NAME);
}
if(ssid == NULL)
if (ssid == NULL)
{
return task;
}
pthread_mutex_lock(&g_tunnel.lock);
node = bst_find(g_tunnel.keychain, simple_hash(ssid));
node = bst_find(g_tunnel.keychain, simple_hash(ssid));
pthread_mutex_unlock(&g_tunnel.lock);
if(node == NULL || node->data == NULL || strcmp(((antd_tunnel_key_t*)node->data)->hash,ssid) != 0)
if (node == NULL || node->data == NULL || strcmp(((antd_tunnel_key_t *)node->data)->hash, ssid) != 0)
{
ERROR("User unauthorized, quit");
pthread_mutex_lock(&g_tunnel.lock);
@ -1063,7 +1077,7 @@ void *handle(void *rq_data)
pthread_mutex_unlock(&g_tunnel.lock);
return task;
}
key_p = (antd_tunnel_key_t*) node->data;
key_p = (antd_tunnel_key_t *)node->data;
pthread_mutex_lock(&g_tunnel.lock);
key_p->last_update = time(NULL);
pthread_mutex_unlock(&g_tunnel.lock);
@ -1139,7 +1153,7 @@ void *handle(void *rq_data)
(void)memcpy(&msg.header.client_id, buffer + offset, sizeof(msg.header.client_id));
offset += sizeof(msg.header.client_id);
if(offset > (int)ws_msg_len)
if (offset > (int)ws_msg_len)
{
ERROR("Invalid message format");
return task;
@ -1150,13 +1164,13 @@ void *handle(void *rq_data)
msg.data = buffer + offset;
// now we have the message
pthread_mutex_lock(&g_tunnel.lock);
process_client_message(&msg, rq->client);
process_client_message(&msg, rq->client, key_p);
pthread_mutex_unlock(&g_tunnel.lock);
}
free(buffer);
}
}
else if(h->opcode == WS_PONG)
else if (h->opcode == WS_PONG)
{
buffer = (uint8_t *)malloc(h->plen + 1);
if (buffer)
@ -1205,7 +1219,7 @@ void *handle(void *rq_data)
ERROR("Unable to ping client, close the connection: %d", client->sock);
return task;
}*/
if(ws_ping(client,"ANTD-TUNNEL",0) != 0)
if (ws_ping(client, "ANTD-TUNNEL", 0) != 0)
{
// close the connection
pthread_mutex_lock(&g_tunnel.lock);
@ -1223,6 +1237,6 @@ void *handle(void *rq_data)
}
task->handle = handle;
task->access_time = time(NULL);
antd_task_bind_event(task,rq->client->sock,0, TASK_EVT_ON_WRITABLE| TASK_EVT_ON_READABLE);
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE | TASK_EVT_ON_READABLE);
return task;
}