標籤:linux socket 網路
Client : mini2440
Server : PC Ubuntu
網路的socket資料轉送是一種特殊的I/O,socket也是一種檔案描述符。socket也有一個類似於開啟檔案的函數:socket(),調用socket(),該函數返回一個整型的socket的描述符,隨後的串連建立、資料轉送等操作也都是通過該socket實現。此次測試用mini2440做Client,PC機做Server,同時串連上區域網路。ping通之後,在mini2440上運行client.c,PC上運行server.c。
client.c :
#include <stdlib.h>#include <sys/types.h>#include <stdio.h>#include <sys/socket.h>#include <netinet/in.h>#include <string.h>int main(){int cfd;int recbytes;int sin_size;char buffer[1024]={0}; struct sockaddr_in s_add,c_add;unsigned short portnum=0x8888; //port numbercfd = socket(AF_INET, SOCK_STREAM, 0);if(-1 == cfd){ printf("socket fail ! \r\n"); return -1;}bzero(&s_add,sizeof(struct sockaddr_in));s_add.sin_family=AF_INET;s_add.sin_addr.s_addr= inet_addr("172.20.21.247"); //IP of your PC s_add.sin_port=htons(portnum);printf("s_addr = %#x ,port : %#x\r\n",s_add.sin_addr.s_addr,s_add.sin_port);if(-1 == connect(cfd,(struct sockaddr *)(&s_add), sizeof(struct sockaddr))){ printf("connect fail !\r\n"); return -1;}printf("connect ok !\r\n");if(-1 == (recbytes = read(cfd,buffer,1024))){ printf("read data fail !\r\n"); return -1;}buffer[recbytes]='\0';printf("%s\r\n",buffer);getchar();close(cfd);return 0;}
server.c :
#include <stdlib.h>#include <sys/types.h>#include <stdio.h>#include <sys/socket.h>#include <netinet/in.h>#include <string.h>int main(){int sfp,nfp;struct sockaddr_in s_add,c_add;int sin_size;unsigned short portnum=0x8888; //port numbersfp = socket(AF_INET, SOCK_STREAM, 0);if(-1 == sfp){ printf("socket fail ! \r\n"); return -1;}printf("socket ok !\r\n");bzero(&s_add,sizeof(struct sockaddr_in));s_add.sin_family=AF_INET;s_add.sin_addr.s_addr=htonl(INADDR_ANY);s_add.sin_port=htons(portnum);if(-1 == bind(sfp,(struct sockaddr *)(&s_add), sizeof(struct sockaddr))){ printf("bind fail !\r\n"); return -1;}if(-1 == listen(sfp,5)){ printf("listen fail !\r\n"); return -1;}while(1){sin_size = sizeof(struct sockaddr_in);nfp = accept(sfp, (struct sockaddr *)(&c_add), &sin_size);if(-1 == nfp){ printf("accept fail !\r\n"); return -1;}printf("waiting for %#x : %#x\r\n",ntohl(c_add.sin_addr.s_addr),ntohs(c_add.sin_port));if(-1 == write(nfp,"hello,socket\r\n",32)){ printf("write fail!\r\n"); return -1;}printf("write ok!\r\n");close(nfp);}close(sfp);return 0;}
編譯client.c: arm-linux-gcc -o client client.c 產生client可執行檔
編譯server.c: gcc -o server server.c 產生server可執行檔
拷貝client到mini2440
PC機運行server:
[email protected]:~# ./server
socket ok !
mini2440運行client:
[root@FriendlyARM /sdcard] # ./client
s_addr = 0xf71514ac ,port : 0x8888
connect ok !
hello,socket
用戶端已經收到了服務端發出的"hello,socket"的字串
Linux socket 測試