Linux下C语言套接字进行图片传输

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/socket.h> #include <sys/types.h> #include <netinet/in.h> //sockaddr_in #define PORT 6675 int main() { int socket_fd; int new_fd; //建立套接字 socket_fd=socket(AF_INET,SOCK_STREAM,0);// int socket(int domain, int... printf("socket_fd is %d\n",socket_fd); //初始化设置地址和端口号 struct sockaddr_in server_addr; memset(&server_addr,0,sizeof(server_addr)); server_addr.sin_family=AF_INET; server_addr.sin_port=htons(PORT); server_addr.sin_addr.s_addr=htonl(INADDR_ANY); memset(&(server_addr.sin_zero),0,8); //设置端口可重用 int contain; setsockopt(socket_fd,SOL_SOCKET, SO_REUSEADDR, &contain, sizeof(int)); //绑定fd和本机地址 int res=bind(socket_fd,(struct sockaddr *)&server_addr,sizeof(server_addr)); printf("bind res is %d\n",res); if(res==-1) return -1; if(listen(socket_fd,20)==-1) { printf("Failed to listen!\n"); return -1; } printf("after listen\n"); while(1) { struct sockaddr_in client_addr; int size=sizeof(client_addr); new_fd=accept(socket_fd, (struct sockaddr *)&client_addr, &size); if(new_fd==-1) { printf("wait for client to connect!\n"); sleep(1); continue; } printf("A connect and the new fd is %d\n",new_fd); /* while(1) { char input[100]; char output[100]; res=read(new_fd,input,100); input[res]=0; printf("client says '%s'\n",input); gets(output); res=write(new_fd,output,strlen(output)); } */ //while(1) { FILE *in; char input[100]; res=read(new_fd,input,100); input[res]=0; char path[100]; sprintf(path,"/mnt/hgfs/share/socketPicSend/server/%s",input); printf("the path is %s\n",path); in=fopen(path,"w"); printf("after path\n"); char photo[10]; while(1) { memset(photo,0,10); res=read(new_fd,photo,10); if(res==0){printf("read nothing"); return 0;} photo[res]=0; int d=atoi(photo); // printf("data %s\n",photo); fputc(d,in); } } } close(socket_fd); close(new_fd); }