程序分为服务端和客户端。
服务端创建打开得到sockfd后，再进行bind绑定通信端口，IP等，然后进入listen和accept阻塞状态。
然后客户端也同样打开sockfd，然后向服务端发起连接。
连接上后，可以方便使用send/write,recv/read进行通信了。
百度套接字C程序，有很多简单例子。
你好！c
语言可以。
你说不考虑硬件是不可能的，软件是建立在硬件的基础上的，其实能编写通过无线网络传输的协议不斤只有c
语言，但是能够和硬件紧密结合的还得数c
语言了
基于unix和linux
的无线网络传输的协议几乎都是用c编写的
我的回答你还满意吗~~
简单的学习代码，仅供参考：
server.c
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <netdb.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#define SERVICE_PORT 8080
#define BUFSIZE 2048
#define HEAD 4
int main(int argc, char **argv)
{
struct sockaddr_in myaddr /* our address */
struct sockaddr_in remaddr /* remote address */
socklen_t addrlen = sizeof(remaddr) /* length of addresses */
int recvlen /* # bytes received */
int fd /* our socket */
int msgcnt = 0 /* count # of messages we received */
unsigned char buf[BUFSIZE]="ret_" /* receive buffer */
/* create a UDP socket */
if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
perror("cannot create socket\n")
return 0
}
/* bind the socket to any valid IP address and a specific port */
memset((char *)&myaddr, 0, sizeof(myaddr))
myaddr.sin_family = AF_INET
myaddr.sin_addr.s_addr = htonl(INADDR_ANY)
myaddr.sin_port = htons(SERVICE_PORT)
if (bind(fd, (struct sockaddr *)&myaddr, sizeof(myaddr)) < 0) {
perror("bind failed")
return 0
}
/* now loop, receiving data and printing what we received */
for ()
{
printf("waiting on port %d\n", SERVICE_PORT)
recvlen = recvfrom(fd, buf+HEAD, BUFSIZE, 0, (struct sockaddr *)&remaddr, &addrlen)
if (recvlen > 0)
{
buf[HEAD+recvlen] = 0
printf("received message: \"%s\" (%d bytes)\n", buf+HEAD, recvlen)
}
else
{
printf("uh oh - something went wrong!\n")
}
printf("sending response \"%s\"\n", buf)
if (sendto(fd, buf, strlen(buf), 0, (struct sockaddr *)&remaddr, addrlen) < 0)
{
perror("sendto")
}
}
close(fd)
return 0
}
client.c
#include <stdlib.h>#include <stdio.h>
#include <string.h>
#include <netdb.h>
#include <sys/socket.h>
#define SERVICE_PORT 8080
#define BUFLEN 2048
int main( int argc,char* argv[] )
{
struct sockaddr_in myaddr, remaddr
int fd, i, slen=sizeof(remaddr)
char sendbuf[BUFLEN]="hello" /* message buffer */
char readbuf[BUFLEN]={0}
int recvlen /* # bytes in acknowledgement message */
char *server = "127.0.0.1" /* change this to use a different server */
/* create a socket */
if ((fd=socket(AF_INET, SOCK_DGRAM, 0))==-1)
{
printf("socket created\n")
}
/* bind it to all local addresses and pick any port number */
memset((char *)&myaddr, 0, sizeof(myaddr))
myaddr.sin_family = AF_INET
myaddr.sin_addr.s_addr = htonl(INADDR_ANY)
myaddr.sin_port = htons(0)
if (bind(fd, (struct sockaddr *)&myaddr, sizeof(myaddr)) < 0)
{
perror("bind failed")
return 0
}
memset((char *) &remaddr, 0, sizeof(remaddr))
remaddr.sin_family = AF_INET
remaddr.sin_port = htons(SERVICE_PORT)
if (inet_aton(server, &remaddr.sin_addr)==0)
{
fprintf(stderr, "inet_aton() failed\n")
exit(1)
}
printf("Sending packet %d to %s port %d\n", i, server, SERVICE_PORT)
if (sendto(fd, sendbuf, strlen(sendbuf), 0, (struct sockaddr *)&remaddr, slen)==-1)
{
perror("sendto")
exit(1)
}
/* now receive an acknowledgement from the server */
recvlen = recvfrom(fd, readbuf, BUFLEN, 0, (struct sockaddr *)&remaddr, &slen)
if ( recvlen >= 0 )
{
readbuf[recvlen] = 0 /* expect a printable string - terminate it */
printf("received message: \"%s\"\n", readbuf)
}
close(fd)
return 0
}
如果需要整个工程，可以联系我。
