dany/ant-http
1
0
Fork 0
mirror of https://github.com/lxsang/ant-http synced 2024-12-26 16:58:22 +01:00
Code Issues Actions Projects Releases Wiki Activity

alpha version of proxy

Browse Source
This commit is contained in:
lxsang 2021-01-26 23:36:24 +01:00
parent 31accd9060
commit c590898e03
6 changed files with 281 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

263
http_server.c
View File

@ -1,4 +1,6 @@
//#define _GNU_SOURCE
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <sys/socket.h>
#include <poll.h>
#include <netinet/in.h>
@ -410,7 +412,6 @@ void *resolve_request(void *data)
char path[2 * BUFFLEN];
antd_request_t *rq = (antd_request_t *)data;
antd_task_t *task = antd_create_task(NULL, (void *)rq, NULL, rq->client->last_io);
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE | TASK_EVT_ON_READABLE);
char *url = (char *)dvalue(rq->request, "RESOURCE_PATH");
char *newurl = NULL;
char *rqp = NULL;
@ -482,7 +483,6 @@ void *resolve_request(void *data)
if (strcmp(mime_type, "application/octet-stream") == 0)
{
char *ex = ext(path);
//printf("Path: %s\n", path);
char *h = NULL;
if (ex)
{
@ -523,6 +523,7 @@ void *resolve_request(void *data)
}
}
}
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE);
task->handle = serve_file;
}
return task;
@ -531,6 +532,8 @@ void *resolve_request(void *data)
void *finish_request(void *data)
{
if (!data)
return NULL;
destroy_request(data);
server_config.connection--;
LOG("Remaining connection %d", server_config.connection);
@ -566,7 +569,6 @@ int rule_check(const char *k, const char *v, const char *host, const char *_url,
}
tmp = (char *)v;
char *search = "<([a-zA-Z0-9]+)>";
//printf("match again %s\n",tmp);
while ((ret = regex_match(search, tmp, 2, val_matches)))
{
memcpy(buf + idx, tmp, val_matches[1].rm_so - 1);
@ -616,7 +618,6 @@ void *serve_file(void *data)
{
antd_request_t *rq = (antd_request_t *)data;
antd_task_t *task = antd_create_task(NULL, (void *)rq, NULL, rq->client->last_io);
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE | TASK_EVT_ON_READABLE);
char *path = (char *)dvalue(rq->request, "ABS_RESOURCE_PATH");
char *mime_type = (char *)dvalue(rq->request, "RESOURCE_MIME");
rq->client->state = ANTD_CLIENT_SERVE_FILE;
@ -737,7 +738,6 @@ char *apply_rules(dictionary_t rules, const char *host, char *url)
{
k = it->key;
v = (char *)it->value;
//printf("[%s]: [%s]\n", k, v);
// 1 group
if (rule_check(k, v, host, url, query_string, url))
{
@ -755,6 +755,198 @@ char *apply_rules(dictionary_t rules, const char *host, char *url)
return strdup(query_string);
}
static void *proxy_monitor(void *data)
{
antd_request_t *rq = (antd_request_t *)data;
rq->client->state = ANTD_CLIENT_PROXY_MONITOR;
antd_client_t *proxy = (antd_client_t *)dvalue(rq->request, "PROXY_HANDLE");
antd_task_t *task = antd_create_task(NULL, data, NULL, rq->client->last_io);
int ret, sz1, sz2;
char *buf = NULL;
buf = (char *)malloc(BUFFLEN);
struct pollfd pfd[1];
memset(pfd, 0, sizeof(pfd));
pfd[0].fd = proxy->sock;
pfd[0].events = POLLIN;
ret = 1;
sz1 = antd_recv_upto(rq->client, buf, BUFFLEN);
if ((sz1 < 0) || (sz1 > 0 && antd_send(proxy, buf, sz1) != sz1))
{
ret = 0;
}
if (poll(pfd, 1, 0) < 0)
{
ret = 0;
}
sz2 = antd_recv_upto(proxy, buf, BUFFLEN);
if (sz2 < 0 || (sz2 > 0 && antd_send(rq->client, buf, sz2) != sz2))
{
ret = 0;
}
free(buf);
if (ret == 0)
{
(void)close(proxy->sock);
return task;
}
if (sz2 == 0)
{
if (
pfd[0].revents & POLLERR ||
pfd[0].revents & POLLRDHUP ||
pfd[0].revents & POLLHUP ||
pfd[0].revents & POLLNVAL ||
pfd[0].revents & POLLIN)
{
(void)close(proxy->sock);
return task;
}
usleep(10000);
}
task->handle = proxy_monitor;
task->access_time = rq->client->last_io;
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_READABLE);
antd_task_bind_event(task, proxy->sock, 0, TASK_EVT_ON_READABLE | TASK_EVT_ON_WRITABLE);
return task;
}
static void *proxify(void *data)
{
int sock_fd, size, ret;
char *str = NULL;
chain_t it;
antd_request_t *rq = (antd_request_t *)data;
antd_client_t *proxy = NULL;
rq->client->state = ANTD_CLIENT_RESOLVE_REQUEST;
char *host = dvalue(rq->request, "PROXY_HOST");
int port = atoi(dvalue(rq->request, "PROXY_PORT"));
char *path = dvalue(rq->request, "PROXY_PATH");
char *query = dvalue(rq->request, "PROXY_QUERY");
dictionary_t xheader = dvalue(rq->request, "REQUEST_HEADER");
antd_task_t *task = antd_create_task(NULL, data, NULL, rq->client->last_io);
if (!xheader)
{
antd_error(rq->client, 400, "Badd Request");
return task;
}
sock_fd = request_socket(ip_from_hostname(host), port);
if (sock_fd == -1)
{
antd_error(rq->client, 503, "Service Unavailable");
return task;
}
set_nonblock(sock_fd);
/*struct timeval timeout;
timeout.tv_sec = 2;
timeout.tv_usec = 0; //POLL_EVENT_TO*1000;
if (setsockopt(sock_fd, SOL_SOCKET, SO_RCVTIMEO, (char *)&timeout, sizeof(timeout)) < 0)
{
ERROR("setsockopt failed:%s", strerror(errno));
antd_error(rq->client, 500, "Internal proxy error");
(void)close(sock_fd);
return task;
}
if (setsockopt(sock_fd, SOL_SOCKET, SO_SNDTIMEO, (char *)&timeout, sizeof(timeout)) < 0)
{
ERROR("setsockopt failed:%s", strerror(errno));
antd_error(rq->client, 500, "Internal proxy error");
(void)close(sock_fd);
return task;
}*/
proxy = (antd_client_t *)malloc(sizeof(antd_client_t));
proxy->sock = sock_fd;
proxy->ssl = NULL;
proxy->zstream = NULL;
proxy->z_level = ANTD_CNONE;
// store content length here
dput(rq->request, "PROXY_HANDLE", proxy);
str = __s("%s %s?%s HTTP/1.1\r\n", (char *)dvalue(rq->request, "METHOD"), path, query);
size = strlen(str);
ret = antd_send(proxy, str, size);
free(str);
if (ret != size)
{
antd_error(rq->client, 500, "");
(void)close(sock_fd);
return task;
}
for_each_assoc(it, xheader)
{
str = __s("%s: %s\r\n", it->key, (char *)it->value);
size = strlen(str);
ret = antd_send(proxy, str, size);
free(str);
if (ret != size)
{
antd_error(rq->client, 500, "");
(void)close(sock_fd);
return task;
}
}
(void)antd_send(proxy, "\r\n", 2);
// now monitor the proxy
task->handle = proxy_monitor;
task->access_time = rq->client->last_io;
// register event
antd_task_bind_event(task, proxy->sock, 0, TASK_EVT_ON_READABLE | TASK_EVT_ON_WRITABLE);
return task;
}
/**
* Check if the current request is e reverse proxy
* return a proxy task if this is the case
*/
static void *check_proxy(antd_request_t *rq, const char *path, const char *query)
{
char *pattern = "^(https?)://([^:]+):([0-9]+)(.*)$";
antd_task_t *task = antd_create_task(NULL, (void *)rq, NULL, rq->client->last_io);
char buff[256];
regmatch_t matches[5];
int ret, size;
ret = regex_match(pattern, path, 5, matches);
if (!ret)
{
return NULL;
}
if (matches[1].rm_eo - matches[1].rm_so == 5)
{
// https is not supported for now
// TODO add https support
antd_error(rq->client, 503, "Service Unavailable");
return task;
}
// http proxy request
size = matches[2].rm_eo - matches[2].rm_so < (int)sizeof(buff) ? matches[2].rm_eo - matches[2].rm_so : (int)sizeof(buff);
(void)memcpy(buff, path + matches[2].rm_so, size);
buff[size] = '\0';
dput(rq->request, "PROXY_HOST", strdup(buff));
size = matches[3].rm_eo - matches[3].rm_so < (int)sizeof(buff) ? matches[3].rm_eo - matches[3].rm_so : (int)sizeof(buff);
(void)memcpy(buff, path + matches[3].rm_so, size);
buff[size] = '\0';
dput(rq->request, "PROXY_PORT", strdup(buff));
dput(rq->request, "PROXY_PATH", strdup(path + matches[4].rm_so));
dput(rq->request, "PROXY_QUERY", strdup(query));
task->handle = proxify;
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_READABLE | TASK_EVT_ON_WRITABLE);
return task;
}
/**
* Decode the HTTP request header
*/
@ -811,10 +1003,16 @@ void *decode_request_header(void *data)
antd_error(rq->client, 413, "Payload Too Large");
ERROR("Header size too large (%d): %d vs %d", rq->client->sock, header_size, HEADER_MAX_SIZE);
task = antd_create_task(NULL, (void *)rq, NULL, rq->client->last_io);
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE | TASK_EVT_ON_READABLE);
return task;
}
}
if (ret == 0)
{
//antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE | TASK_EVT_ON_READABLE);
task = antd_create_task(decode_request_header, (void *)rq, NULL, rq->client->last_io);
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_READABLE);
return task;
}
// check for content length size
line = (char *)dvalue(xheader, "Content-Length");
if (line)
@ -827,7 +1025,6 @@ void *decode_request_header(void *data)
// 100 ms sleep
usleep(100000);
task = antd_create_task(NULL, (void *)rq, NULL, rq->client->last_io);
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE | TASK_EVT_ON_READABLE);
return task;
}
}
@ -865,6 +1062,16 @@ void *decode_request_header(void *data)
dput(rq->request, "COOKIE", cookie);
if (host)
free(host);
// check if this is a reverse proxy ?
task = check_proxy(rq, buf, query);
if (task)
{
if (query)
free(query);
return task;
}
dput(rq->request, "RESOURCE_PATH", url_decode(buf));
if (query)
{
@ -873,7 +1080,7 @@ void *decode_request_header(void *data)
}
// header ok, now checkmethod
task = antd_create_task(decode_request, (void *)rq, NULL, rq->client->last_io);
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;
}
@ -892,8 +1099,8 @@ void *decode_request(void *data)
ws = 1;
method = (char *)dvalue(rq->request, "METHOD");
task = antd_create_task(NULL, (void *)rq, NULL, rq->client->last_io);
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE | TASK_EVT_ON_READABLE);
if (strcmp(method, "GET") == 0 || strcmp(method, "HEAD") == 0 || strcmp(method, "OPTIONS") == 0)
//antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE | TASK_EVT_ON_READABLE);
if (EQU(method, "GET"))
{
//if(ctype) free(ctype);
if (ws && ws_key != NULL)
@ -908,7 +1115,12 @@ void *decode_request(void *data)
task->handle = resolve_request;
return task;
}
else if (strcmp(method, "POST") == 0)
else if(EQU(method, "HEAD") || EQU(method, "OPTIONS") || EQU(method, "DELETE") )
{
task->handle = resolve_request;
return task;
}
else if (EQU(method, "POST") || EQU(method, "PUT") || EQU(method, "PATCH"))
{
task->handle = resolve_request;
return task;
@ -923,6 +1135,7 @@ void *decode_request(void *data)
void *decode_post_request(void *data)
{
antd_request_t *rq = (antd_request_t *)data;
rq->client->state = ANTD_CLIENT_RQ_DATA_DECODE;
dictionary_t request = dvalue(rq->request, "REQUEST_DATA");
dictionary_t headers = dvalue(rq->request, "REQUEST_HEADER");
char *ctype = NULL;
@ -935,8 +1148,8 @@ void *decode_post_request(void *data)
clen = atoi(tmp);
char *method = (char *)dvalue(rq->request, "METHOD");
task = antd_create_task(NULL, (void *)rq, NULL, rq->client->last_io);
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE | TASK_EVT_ON_READABLE);
if (!method || strcmp(method, "POST") != 0)
//antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE | TASK_EVT_ON_READABLE);
if (!method || (!EQU(method, "POST") && !EQU(method, "PUT") && EQU(method, "PATCH")))
return task;
if (ctype == NULL || clen == -1)
{
@ -954,7 +1167,10 @@ void *decode_post_request(void *data)
}
else if (clen > 0)
{
// WARN: this may not work on ssl socket
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_READABLE | TASK_EVT_ON_WRITABLE);
task->handle = decode_post_request;
return task;
}
}
else if (strstr(ctype, FORM_MULTI_PART))
@ -965,7 +1181,6 @@ void *decode_post_request(void *data)
else
{
char *pquery = post_data_decode(rq->client, clen);
//printf("POST: %s\n", pquery);
char *key = strstr(ctype, "/");
if (key)
key++;
@ -979,8 +1194,11 @@ void *decode_post_request(void *data)
else if (clen > 0)
{
task->handle = decode_post_request;
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_READABLE | TASK_EVT_ON_WRITABLE);
return task;
}
}
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE);
return task;
}
@ -1000,7 +1218,6 @@ void ws_confirm_request(void *client, const char *key)
if (n < 0)
n = 0;
strncat(rkey, WS_MAGIC_STRING, n);
//printf("RESPONDKEY '%s'\n", rkey);
#ifdef USE_OPENSSL
SHA_CTX context;
#else
@ -1011,7 +1228,6 @@ void ws_confirm_request(void *client, const char *key)
SHA1_Update(&context, rkey, strlen(rkey));
SHA1_Final((uint8_t *)sha_d, &context);
Base64encode(base64, sha_d, 20);
//printf("Base 64 '%s'\n", base64);
// send accept to client
sprintf(buf, "HTTP/1.1 101 Switching Protocols\r\n");
antd_send(client, buf, strlen(buf));
@ -1063,7 +1279,8 @@ void *decode_multi_part_request(void *data, const char *ctype)
int len;
antd_request_t *rq = (antd_request_t *)data;
antd_task_t *task = antd_create_task(NULL, (void *)rq, NULL, rq->client->last_io);
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);
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_READABLE);
//dictionary dic = NULL;
boundary = strsep(&str_copy, "="); //discard first part
boundary = str_copy;
@ -1097,7 +1314,7 @@ void *decode_multi_part_request_data(void *data)
char *token, *keytoken, *valtoken;
antd_request_t *rq = (antd_request_t *)data;
antd_task_t *task = antd_create_task(NULL, (void *)rq, NULL, rq->client->last_io);
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);
char *boundary = (char *)dvalue(rq->request, "MULTI_PART_BOUNDARY");
dictionary_t dic = (dictionary_t)dvalue(rq->request, "REQUEST_DATA");
// search for content disposition:
@ -1214,20 +1431,23 @@ void *decode_multi_part_request_data(void *data)
}
free(part_name);
}
//printf("[Lines]:%s\n",line);
// check if end of request
if (line && strstr(line, boundend))
{
//LOG("End request %s", boundend);
free(boundend);
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE);
return task;
}
free(boundend);
if (line && strstr(line, boundary))
{
// continue upload
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_READABLE);
task->handle = decode_multi_part_request_data;
return task;
}
free(boundend);
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE);
return task;
}
/**
@ -1356,7 +1576,6 @@ void *execute_plugin(void *data, const char *pname)
{
free(task);
task = antd_create_task(decode_post_request, (void *)rq, fn, rq->client->last_io);
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE | TASK_EVT_ON_READABLE);
}
return task;
}

7
httpd.c
View File

@ -297,6 +297,13 @@ void antd_scheduler_ext_statistic(int fd, void *user_data)
void antd_scheduler_destroy_data(void *data)
{
antd_request_t *rq = (antd_request_t *)data;
antd_client_t *proxy = (antd_client_t *)dvalue(rq->request, "PROXY_HANDLE");
if(proxy)
{
printf("closing proxy \n");
close(proxy->sock);
}
finish_request(data);
}

6
lib/handle.c
View File

@ -603,11 +603,11 @@ int antd_recv_upto(void *src, void *data, int len)
time(&source->last_io);
return received;
}
if (received == 0 || (errno != EAGAIN && errno != EWOULDBLOCK))
if (received <= 0 && (errno == EAGAIN || errno == EWOULDBLOCK))
{
return -1;
}
return 0;
}
return -1;
#ifdef USE_OPENSSL
}
#endif

2
lib/handle.h
View File

@ -25,6 +25,8 @@
#define ANTD_CLIENT_PROTO_CHECK 0x4
#define ANTD_CLIENT_RESOLVE_REQUEST 0x5
#define ANTD_CLIENT_SERVE_FILE 0x6
#define ANTD_CLIENT_RQ_DATA_DECODE 0x7
#define ANTD_CLIENT_PROXY_MONITOR 0x8
typedef enum
{

43
lib/scheduler.c
View File

@ -10,7 +10,7 @@
#include "utils.h"
#include "bst.h"
#define MAX_VALIDITY_INTERVAL 60 // 1minute
#define MAX_VALIDITY_INTERVAL 30 // s
#define MAX_FIFO_NAME_SZ 255
// callback definition
@ -644,33 +644,36 @@ static void antd_deploy_task(bst_node_t* node, void** argv, int argc)
return;
antd_scheduler_t* sched = (antd_scheduler_t*) argv[0];
antd_task_t* task = node->data;
pthread_mutex_lock(&sched->scheduler_lock);
sched->task_queue = bst_delete(sched->task_queue, task->id);
pthread_mutex_unlock(&sched->scheduler_lock);
antd_task_schedule(sched, task);
}
static void task_event_collect(bst_node_t* node, void** argv, int argc)
{
UNUSED(argc);
antd_task_t* task = (antd_task_t*) node->data;
antd_queue_t* exec_list = (antd_queue_t*) argv[0];
bst_node_t** exec_list = (bst_node_t**) argv[0];
bst_node_t** poll_list = (bst_node_t**) argv[1];
int* pollsize = (int*) argv[2];
if(!task->events)
{
enqueue(exec_list, task);
*exec_list = bst_insert(*exec_list,task->id, task);
return;
}
antd_queue_item_t it = task->events;
while(it)
{
if(it->evt->flags & TASK_EVT_ALWAY_ON)
if((it->evt->flags & TASK_EVT_ALWAY_ON) || antd_scheduler_validate_data(task) == 0 )
{
enqueue(exec_list, task);
*exec_list = bst_insert(*exec_list,task->id, task);
}
else if(it->evt->flags & TASK_EVT_ON_TIMEOUT)
{
// check if timeout
if(difftime(time(NULL),task->stamp) > it->evt->timeout )
{
enqueue(exec_list, task);
*exec_list = bst_insert(*exec_list,task->id, task);
}
}
else
@ -696,7 +699,7 @@ void *antd_scheduler_wait(void *ptr)
{
int pollsize, ready;
void *argv[3];
antd_queue_t exec_list = NULL;
//antd_queue_t exec_list = NULL;
bst_node_t* poll_list = NULL;
bst_node_t* scheduled_list = NULL;
antd_queue_item_t it = NULL;
@ -709,14 +712,14 @@ void *antd_scheduler_wait(void *ptr)
while (scheduler->status)
{
pollsize = 0;
argv[0] = &exec_list;
argv[0] = &scheduled_list;
argv[1] = &poll_list;
argv[2] = &pollsize;
pthread_mutex_lock(&scheduler->scheduler_lock);
bst_for_each(scheduler->task_queue, task_event_collect, argv, 3);
pthread_mutex_unlock(&scheduler->scheduler_lock);
// schedule exec list first
it = exec_list;
/*it = exec_list;
while(it)
{
if(it->task)
@ -730,7 +733,7 @@ void *antd_scheduler_wait(void *ptr)
curr = it;
it = it->next;
free(curr);
}
}*/
// Detect event on pollist
if(pollsize > 0)
{
@ -768,8 +771,6 @@ void *antd_scheduler_wait(void *ptr)
// event triggered schedule the task
pthread_mutex_lock(&scheduler->scheduler_lock);
task_node = bst_find(scheduler->task_queue, eit->task->id);
if(task_node)
scheduler->task_queue = bst_delete(scheduler->task_queue, eit->task->id);
pthread_mutex_unlock(&scheduler->scheduler_lock);
if(task_node)
scheduled_list = bst_insert(scheduled_list, eit->task->id, eit->task);
@ -778,15 +779,18 @@ void *antd_scheduler_wait(void *ptr)
else if( (pfds[i].revents & POLLERR) || (pfds[i].revents & POLLHUP)) {
// task is no longer available
ERROR("Poll: Task %d is no longer valid. Remove it", eit->task->id);
// remove task from task queue
pthread_mutex_lock(&scheduler->scheduler_lock);
scheduler->task_queue = bst_delete(scheduler->task_queue, eit->task->id);
pthread_mutex_unlock(&scheduler->scheduler_lock);
eit->task->access_time = 0;
eit->task->handle = NULL;
antd_scheduler_destroy_data(eit->task->data);
destroy_task(eit->task);
eit->task->data = NULL;
scheduled_list = bst_insert(scheduled_list, eit->task->id, eit->task);
}
}
}
}
free(pfds);
}
}
if(scheduled_list)
{
argv[0] = scheduler;
@ -794,11 +798,6 @@ void *antd_scheduler_wait(void *ptr)
bst_free(scheduled_list);
scheduled_list = NULL;
}
}
free(pfds);
}
}
exec_list = NULL;
bst_free(poll_list);
poll_list = NULL;

2
lib/scheduler.h
View File

@ -11,7 +11,7 @@
#define TASK_EVT_ON_READABLE 0x02
#define TASK_EVT_ON_WRITABLE 0x04
#define TASK_EVT_ON_TIMEOUT 0x08
#define POLL_EVENT_TO 100 // ms
#define POLL_EVENT_TO 50 // ms
typedef struct _antd_scheduler_t antd_scheduler_t;
typedef struct _antd_callback_t antd_callback_t;