TCP收发图片

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recvpic.c

#include<stdio.h>#include<stdlib.h>#include<unistd.h>#include<sys/types.h>#include<sys/socket.h>#include<string.h>#include<netinet/in.h>#include<memory.h>#include<arpa/inet.h>#define PORT 3214#define MAXLOG 100main(){int sockfd;struct sockaddr_in server,client;socklen_t len;int clientfd;int num;int MAXDATASIZE=32*1024;char buf[MAXDATASIZE];FILE *file; if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1) { perror("socket");exit(1);}bzero(&server,sizeof(server));server.sin_family=AF_INET;server.sin_port=htons(PORT);server.sin_addr.s_addr=htonl(INADDR_ANY);setsockopt(sockfd,SOL_SOCKET,SO_RCVBUF,(const char*)&MAXDATASIZE,sizeof(int));if(bind(sockfd,(struct sockaddr *)&server,sizeof(server))==-1){perror("bind");close(sockfd);exit(2);}if((listen(sockfd,MAXLOG))==-1){perror("listen");close(sockfd);exit(1);}len=sizeof(client);if((clientfd=accept(sockfd,(struct sockaddr *)&client,&len))==-1){perror("accept");close(sockfd);exit(1);}if((file=fopen("/home/orisun/recvpic.jpg","wb"))==NULL){perror("fopen");close(sockfd);exit(1);}while(1){num=recv(clientfd,buf,MAXDATASIZE,0);if(num<0){perror("recvfrom");close(sockfd);fclose(file);exit(3);}fwrite(buf,1,num,file);if(num<MAXDATASIZE)break;}close(sockfd);fclose(file);return 0;}

sendpic.c

#include<stdio.h>#include<memory.h>#include<stdlib.h>#include<sys/types.h>#include<unistd.h>#include<sys/socket.h>#include<netinet/in.h>#include<netdb.h>#include<sys/socket.h>#define PORT 3214int main(){int sockfd,num;int MAXDATASIZE=32*1024;char buf[MAXDATASIZE];struct hostent *he;struct sockaddr_in server,peer;FILE *file;if((he=gethostbyname("192.168.1.111"))==NULL){perror("getnostbyname");exit(2);}if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1){perror("socket");exit(3);}bzero(&server,sizeof(server));server.sin_family=AF_INET;server.sin_port=htons(PORT);server.sin_addr=*((struct in_addr*)he->h_addr);setsockopt(sockfd,SOL_SOCKET,SO_SNDBUF,(const char*)&MAXDATASIZE,sizeof(int));if(connect(sockfd,(struct sockaddr*)&server,sizeof(struct sockaddr))==-1){perror("connect");close(sockfd);exit(1);}if((file=fopen("/home/orisun/Develop/Rental_Service/housepic/rental1.jpg","rb"))==NULL){perror("fopen");close(sockfd);exit(1);}bzero(buf,sizeof(buf));while(!feof(file)){num=fread(buf,1,MAXDATASIZE,file);if(num!=send(sockfd,buf,num,0)){perror("send");break;}}close(sockfd);fclose(file);return 0;}