伙计们,
如果您不介意,请参阅以下代码:
#include <glib.h>
#include <gio/gio.h> // gio channel
#include <sys/socket.h> //socket();
#include <netdb.h> // structure
#include <stdio.h> // printf
void deal(GIOChannel *in, GIOCondition condition, gpointer data)
{
struct sockaddr_storage income;
int insock = g_io_channel_unix_get_fd(in);
socklen_t income_len = sizeof(income);
int newsock = accept(insock, (struct sockaddr*)&income, &income_len );
if(newsock == -1)
{
printf("failure on newsock\n");
}
char buff[128];
int recv_total = 0;
int recv_byte = 128;
int recv_sizing;
while (recv_total < recv_byte ){
recv_sizing = recv(newsock,buff + recv_total,recv_byte,0);
// breaking if recv_sizing = -1 assuming as error, 0 assuming as lost communication from client suddenly
if(recv_sizing < 0 || recv_sizing == 0)
{
printf("connection lost or error while recv(); [ just guess ] number : %d \n",recv_sizing);
break;
}
recv_byte -= recv_sizing;
recv_total += recv_sizing;
}
buff[recv_total] = '\0';
//recv_sizing = recv(newsock,buff,recv_byte,0);
printf("data : %s\n",buff);
close(newsock); // close immediate and look for another some1 new
}
int main()
{
GIOChannel *in;
struct sockaddr_in my;
my.sin_addr.s_addr = INADDR_ANY;
my.sin_family = AF_INET;
my.sin_port = htons(3000);
//socket initiate root socket
int rsock = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
//allow re-use address
setsockopt(rsock,SOL_SOCKET,SO_REUSEADDR,(int*)1,sizeof(int));
//binding
bind(rsock,(struct sockaddr*)&my,sizeof(my));
//listen
listen(rsock,10);
in = g_io_channel_unix_new(rsock);
g_io_add_watch(in, G_IO_IN | G_IO_OUT | G_IO_HUP, (GIOFunc) deal, NULL);
GMainLoop *loop = g_main_loop_new(NULL,FALSE); // pengganti while(1) ato gtk_main_loop
g_main_loop_run(loop);
return 0;
}
它被编译:
$ gcc -o dengersocket_glib dengersocket_glib.c `pkg-config --cflags --libs glib-2.0`
现在正在侦听并期待来自客户端的任何数据包数据 并且客户端发送以下数据包:
$ echo wew | nc -v localhost 3000
nc: connect to localhost port 3000 (tcp) failed: Connection refused
Connection to localhost 3000 port [tcp/*] succeeded!
现在服务器收到以下奇怪的数据包:
$ ./dengersocket_glib
data : �o=
我的问题是,我的代码出错了吗?
1.如何获取正确的数据包,每个客户端都可以连接到服务器? [解决]
2.传递的数据已经解决,但仍然只能接受一个客户,如何获得多个客户?
答案 0 :(得分:1)
int recv_total;
应该是
int recv_total = 0;
由于缺少初始化而导致recv_total
的随机垃圾值,您还会在buf
中获得随机垃圾数据,除非recv_total
恰好是&lt; 128,并且除非recv_total
碰巧为0,否则缓冲区中的第一个字符将是垃圾。
编辑: 此外,你的接受调用是错误的,你将一个大小转换为void *但是应该传递指向socklen_t的指针,该指针应该包含并接收sockaddr的大小。
socklen_t ss = sizeof(income);
accept(..., &ss);
然后,检查来自accept的返回值,看看你有一个有效的套接字。
if (newsock == -1) {
printf("...");
}