TCP.rar_LINUX TCP _Linux 文件传输_tcp linux_tcp传输_文件传输 协议

/* fpont 12/99 */ /* pont.net */ /* tcpClient.c */ #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <netdb.h> #include <stdio.h> #include <unistd.h> /* close */ #define SERVER_PORT 1500 #define MAX_MSG 100 #define maxsize 1024 int main (int argc, char *argv[]) { int sd, rc, i, fd; char buff[maxsize]; struct sockaddr_in localAddr, servAddr; struct hostent *h; if(argc < 3) { printf("usage: %s <server> <filename>\n",argv[0]); exit(1); } h = gethostbyname(argv[1]); if(h==NULL) { printf("%s: unknown host '%s'\n",argv[0],argv[1]); exit(1); } servAddr.sin_family = h->h_addrtype; memcpy((char *) &servAddr.sin_addr.s_addr, h->h_addr_list[0], h->h_length); servAddr.sin_port = htons(SERVER_PORT); /* create socket */ sd = socket(AF_INET, SOCK_STREAM, 0); if(sd<0) { perror("cannot open socket "); exit(1); } /* bind any port number */ localAddr.sin_family = AF_INET; localAddr.sin_addr.s_addr = htonl(INADDR_ANY); localAddr.sin_port = htons(0); rc = bind(sd, (struct sockaddr *) &localAddr, sizeof(localAddr)); if(rc<0) { printf("%s: cannot bind port TCP %u\n",argv[0],SERVER_PORT); perror("error "); exit(1); } /* connect to server */ rc = connect(sd, (struct sockaddr *) &servAddr, sizeof(servAddr)); if(rc<0) { perror("cannot connect "); exit(1); } fd=open(argv[2],O_RDONLY); if(fd==-1) { printf("file %s cannot open",argv[2]); exit(1); } while(1) { i=read(fd,buff,maxsize); rc = send(sd, buff, i, 0); if(rc<0) { perror("cannot send file "); close(sd); exit(1); } if(i!=maxsize) { printf("%s: file %s has been sent \n",argv[0],"joke.mpg"); break; } } close(fd); close(sd); return 0; }