error: ‘struct in_addr’ has no member named ‘S_un’

[junjin456963]

用GCC调试出了 error: ‘struct in_addr’ has no member named ‘S_un’ 。找了MSDN，谷歌，一堆英文试着看了几下，也没找着我把代码列出，各位帮我看下哪里错了，在这先谢谢了

#include <stdio.h>
#include <sys/socket.h>
#include <unistd.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <errno.h>
#include <string.h>
int main(int argc,char *argv[])
{
int server_socket;
int client_socket;
char buffer[512];
pid_t child_id;
int read_count;
int addr_len = sizeof(struct sockaddr_in);
struct sockaddr_in ser_addr,client_addr;
memset(buffer,0,512);
server_socket = socket(AF_INET,SOCK_STREAM,0);
if(server_socket<0)
{
perror("server_socket");
}

ser_addr.sin_family = AF_INET;
ser_addr.sin_port = htons(6666);
ser_addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");

if(bind(server_socket,(struct sockaddr*)&ser_addr,addr_len)<0)
{
perror("bind:");
}

listen(server_socket,10);
while(1)
{
client_socket = accept(server_socket,(struct sockaddr*)&client_addr,&addr_len);
child_id = fork();
if(child_id == 0)
{
while((read_count = read(client_socket,buffer,512))>0)
{
close(server_socket);
write(client_socket,buffer,read_count);
memset(buffer,0,512);
}

}
else if(child_id > 0)
{
close(client_socket);
}
}

return 0;
}

[dongjiawei316]

错误报警很明白啊！就是说没有S_un这个成员啊！

[冰霜icefrost]

改成下面的试试看

ser_addr.sin_addr.s_addr = inet_addr("127.0.0.1");

[冰霜icefrost]

楼主没copy错，你的程序应该是在windows上运行吧，
你是Linux中，还是windows？

winsock.h中有如下定义：

struct in_addr {
	union {
		struct { u_char s_b1,s_b2,s_b3,s_b4; } S_un_b;
		struct { u_short s_w1,s_w2; } S_un_w;
		u_long S_addr;
	} S_un;
#define s_addr  S_un.S_addr
#define s_host  S_un.S_un_b.s_b2
#define s_net   S_un.S_un_b.s_b1
#define s_imp   S_un.S_un_w.s_w2
#define s_impno S_un.S_un_b.s_b4
#define s_lh    S_un.S_un_b.s_b3
};

[junjin456963]

确实我现在LINUX下用GCC调，我看播布客里《SOCKET入门编程》视频里讲的一样，按他的代码调试，视频里他用GCC通过，但我用GCC不通过，，，

[junjin456963]

MSDN上说的
in_addr
Windows CE 5.0
Send Feedback
This structure represents a host by its Internet address.

struct in_addr {
union {
struct { u_char s_b1,s_b2,s_b3,s_b4; } S_un_b;
struct { u_short s_w1,s_w2; } S_un_w;
u_long S_addr;
} S_un;
};
这里的S_un是不是WINDOWS的，而LINUX上不是这个。。。。？？？

[junjin456963]

[Quote=引用 1 楼 justkk 的回复:]

ser_addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
这是从哪儿摘录的

unix系统中通常没有大写的命令或函数或成员
试试
ser_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
[/Quote]

确实视频里写的是ser_addr.sin_addr = inet_addr("127.0.0.1");
但我发现有错，就从MSDN上找了，，，，，自己改，，，，

[justkk]

ser_addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
这是从哪儿摘录的

unix系统中通常没有大写的命令或函数或成员
试试
ser_addr.sin_addr.s_addr = inet_addr("127.0.0.1");

[jiahehao]

/* Internet address. */
struct in_addr {
__be32 s_addr;
};

上面是内核里的定义。

估计楼主copy代码的时候有问题，呵呵。