绑定错误(99):无法分配请求的地址 [英] Bind error (99): Cannot assign requested address
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问题描述
我正在尝试使以下代码工作,但收到上述错误.我可以肯定地确定我输入的地址是正确的,因为它可以在执行类似任务的单独程序中使用.这使我相信我犯了一些愚蠢的错误,我们将不胜感激!
I am trying to get the following piece of code working but receiving the above error. I am reasonably sure that the address I am putting in is correct because it works in a separate program which is doing a similar task. This leads me to believe I am making some sort of silly mistake, any help would be appreciated!
/*Create TCP socket*/
int tcp_socket(void)
{
int s;
while((s = socket(PF_INET,SOCK_STREAM,0))==-1 && errno == EINTR){
continue;
}
return s;
}
/*Bind tcp*/
int tcp_bind(int s, char *server, uint16_t port)
{
int rv;
struct sockaddr_in sin;
struct hostent *host_addr;
assert(s >= 0);
host_addr = gethostbyname(server);
if (!host_addr) {
perror("gethostbyname(server)");
return -1;
}
memset(&sin, '\0', sizeof sin);
sin.sin_family = AF_INET;
sin.sin_port = htons(port);
sin.sin_addr = *((struct in_addr *)host_addr->h_addr);
while((rv = bind(s,(struct sockaddr *)&sin, sizeof sin)) == -1
&& errno == EINTR) {
continue;
}
return (rv == 0) ? 0 : errno;
}
int connect_to_server()
{
int rv;
int socket = tcp_socket();
_logf(LOG_DEBUG, "LOG %s:%d (%s) - %s:%d", __FILE__, __LINE__, __func__, "Socket created:", socket);
rv = tcp_bind(socket,options.server_p, options.dest_port);
if(rv != 0) {
_logf(LOG_ALERT, "LOG %s:%d (%s) - %s:%s", __FILE__, __LINE__, __func__, "tcp_bind failed, error", strerror(rv));
return -1;
}
else {
_logf(LOG_ALERT, "LOG %s (%s) - %s:%d", __FILE__, __LINE__, __func__, "TCP bind success");
}
}
int main(int argc, char **argv)
{
if (sysconf() == -1) {
exit(-1);
}
sysinit();
if (parse_options(argc, argv) == -1) {
usage();
exit(1);
}
connect_to_server();
}
错误消息:
Sep 10 10:59:21 michael-VirtualBox mld: LOG mld.c:685 (connect_to_server) - tcp_bind failed, error:Cannot assign requested address
推荐答案
您只能将套接字绑定到本地接口的地址.
You can only bind a socket to an address of a local interface.
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