//网络编程客户端--大文件传输
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>int main(int arg,char *args[])
{if(arg<4){printf("please print three param !\n");return -1;}int port=atoi(args[2]);//create socketint st=socket(AF_INET,SOCK_STREAM,0);if(st==-1){printf("create socket failed ! error message :%s\n",strerror(errno));return -1;}//defien IP addressstruct sockaddr_in addr;//init addrmemset(&addr,0,sizeof(addr));addr.sin_family=AF_INET;addr.sin_port=htons(port);addr.sin_addr.s_addr=inet_addr(args[1]);if(connect(st,(struct sockaddr *)&addr,sizeof(addr))==-1){printf("connect failed ! error message :%s\n",strerror(errno));goto END;}//send file//define file streamFILE * pfr=NULL;//open the file in read modepfr=fopen(args[3],"r");if(pfr==NULL){printf("open the file failed !error message :%s\n",strerror(errno));goto END;}char buf[1024]={0};size_t num=0;while((num=fread(buf,sizeof(char),sizeof(buf),pfr))>0){//send part of the fileif(send(st,buf,sizeof(char)*num,0)==-1){printf("send failed !error message :%s\n",strerror(errno));break;}memset(buf,0,sizeof(buf));}fclose(pfr);END:close(st);return 0;
}

//网络编程服务端--发送大文件
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>int main(int arg, char *args[])
{if (arg < 2){printf("please print two param !\n");return -1;}int port = atoi(args[1]);int st = socket(AF_INET, SOCK_STREAM, 0);if (st == -1){printf("create socket failed ! error message :%s\n", strerror(errno));return -1;}//defien IP addressstruct sockaddr_in addr;memset(&addr, 0, sizeof(addr));addr.sin_family = AF_INET;addr.sin_port = htons(port);addr.sin_addr.s_addr = htonl(INADDR_ANY);//bind portif (bind(st, (struct sockaddr *) &addr, sizeof(addr)) == -1){printf("bind failed ! error message :%s\n", strerror(errno));goto END;}//listenif (listen(st, 20) == -1){printf("listen failed ! error message :%s\n", strerror(errno));goto END;}//只接收一个用户连接int clientst = 0;struct sockaddr_in client_addr;memset(&client_addr, 0, sizeof(client_addr));size_t client_addrlen = sizeof(client_addr);clientst = accept(st, (struct sockaddr *) &client_addr, &client_addrlen);if (clientst == -1){printf("accept failed ! error message :%s\n", strerror(errno));goto END;}//recv messagechar buf[1024] = { 0 };int mflag = 0;//open the file streamFILE * pfa = NULL;pfa = fopen("/home/test/2/1.dat", "a");if (pfa == NULL){printf("open the file failed ! error message :%s\n", strerror(errno));goto END;}while (1){mflag = recv(clientst, buf, sizeof(buf), 0);if (mflag == 0){printf("client is closed!\n");break;} else if (mflag == -1){printf("recv message is failed ! error message :%s\n",strerror(errno));break;}//将文件写到当前程序目录下fwrite(buf, sizeof(char), mflag, pfa);memset(buf, 0, sizeof(buf));}fclose(pfa);END: close(st);return 0;
}

.SUFFIXES:.c .o
CC=gcc
SRCS1=mclient.c
SRCS2=mserver.c
OBJS1=$(SRCS1:.c=.o)
OBJS2=$(SRCS2:.c=.o)
EXEC1=mcl
EXEC2=mserstart:$(OBJS1) $(OBJS2)$(CC) -o $(EXEC1) $(OBJS1)$(CC) -o $(EXEC2) $(OBJS2)@echo "-------ok-----------"
.c.o:$(CC) -Wall -g -o $@ -c $<
clean:rm -f $(OBJS1)rm -f $(EXEC1)rm -f $(OBJS2)rm -f $(EXEC2)