libevent接收数据超长就会没有反映
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <event.h>
#define PORT 25341
#define BACKLOG 5
#define MEM_SIZE 10
struct event_base* base;
struct sock_ev {
struct event* read_ev;
struct event* write_ev;
char* buffer;
};
int setnonblock(int fd)
{
int flags;
flags = fcntl(fd, F_GETFL);
flags |= O_NONBLOCK;
fcntl(fd, F_SETFL, flags);
}
void release_sock_event(struct sock_ev* ev)
{
event_del(ev->read_ev);
free(ev->read_ev);
free(ev->write_ev);
free(ev->buffer);
free(ev);
ev = NULL;
}
void on_write(int sock, short event, void* arg)
{
char* buffer = (char*)arg;
printf("send:[%d]%s,%u\n",buffer,buffer,strlen(buffer));
send(sock, buffer, strlen(buffer), 0);
free(buffer);
}
void on_read(int sock, short event, void* arg)
{
struct event* write_ev;
int size;
struct sock_ev* ev = (struct sock_ev*)arg;
ev->buffer = (char*)malloc(MEM_SIZE);
bzero(ev->buffer, MEM_SIZE);
size = recv(sock, ev->buffer, MEM_SIZE-2, 0);
printf("begin\n");
ev->buffer[size] = '\n';
printf("paddr:%d\n",ev->buffer);
printf("receive data:%s, size:%d\n", ev->buffer, size);
if (size == 0 ) { // || size > MEM_SIZE-1 不加这个判断条件，在输入超长的时候就会报错
release_sock_event(ev);
close(sock);
return;
}
printf("end1\n");
event_set(ev->write_ev, sock, EV_WRITE, on_write, ev->buffer);
event_base_set(base, ev->write_ev);
event_add(ev->write_ev, NULL);
printf("end2\n");
}
void on_accept(int sock, short event, void* arg)
{
struct sockaddr_in cli_addr;
int newfd, sin_size;
struct sock_ev* ev = (struct sock_ev*)malloc(sizeof(struct sock_ev));
ev->read_ev = (struct event*)malloc(sizeof(struct event));
ev->write_ev = (struct event*)malloc(sizeof(struct event));
sin_size = sizeof(struct sockaddr_in);
newfd = accept(sock, (struct sockaddr*)&cli_addr, &sin_size);
setnonblock(newfd);
event_set(ev->read_ev, newfd, EV_READ|EV_PERSIST, on_read, ev); //EV_PERSIST 去掉这个，只read一次就退出了
event_set(ev->write_ev, newfd, EV_WRITE|EV_PERSIST, on_write, ev->buffer);
event_base_set(base, ev->write_ev);
event_base_set(base, ev->read_ev);
event_add(ev->read_ev, NULL);
}
int main(int argc, char* argv[])
{
struct sockaddr_in my_addr;
int sock;
sock = socket(AF_INET, SOCK_STREAM, 0);
int yes = 1;
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
memset(&my_addr, 0, sizeof(my_addr));
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(PORT);
my_addr.sin_addr.s_addr = INADDR_ANY;
bind(sock, (struct sockaddr*)&my_addr, sizeof(struct sockaddr));
listen(sock, BACKLOG);
struct event listen_ev;
base = event_base_new();
setnonblock(sock);
event_set(&listen_ev, sock, EV_READ, on_accept, NULL); //EV_PERSIST
event_base_set(base, &listen_ev);
event_add(&listen_ev, NULL);
event_base_dispatch(base);
return 0;
}
在学习libevent的时候，遇到一个问题，在上面的例子里，如果对服务器发送超过10个以上长度的字符串的时候，服务器就会没有反应，求牛人指点。
[解决办法]
不知道有多少前人掉在TCP Socket
send(人多)send(病少)send(财富)
recv(人多病)recv(少财富)
陷阱里面啊！
http://topic.csdn.net/u/20120210/09/51109ed0-07b9-41f2-b487-a51597f2ca01.html
