多客户端连接服务器传输文件

1、/*可以实现文件的传送功能，且可以选择存放的路径，若该路径有相同的文件名则询问*是否需要更改存储的文件名，如果需要则重新命名，否则退出。*20110908*/*外加实现多线程，即多个客户端能同时传送文件给服务器*2011-09-19*/服务器#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <sys/socket.h>#include <netinet/in.h>#include <dirent.h>#include <string.h&

2、gt;#include <arpa/inet.h>#include <errno.h>#include <sys/types.h>#include <sys/wait.h>#include <signal.h>#include <fcntl.h>#include <pthread.h>#define LISTENQ20#define MAXLINE40#define BUFFERSIZE4096#define PORT3336/*将buf中的字节内容写入文件描述符fd*/ssize_t writen(int f

3、d, const void * vptr, size_t n)size_tnleft;ssize_t nwritten;const char * ptr;ptr = vptr;nleft = n;while ( nleft > 0) /start to writeif (nwritten = write(fd, ptr, nleft) <= 0)if (nwritten < 0 && errno = EINTR) /interupt errornwritten = 0;elsereturn -1;nleft -= nwritten;ptr += nwritte

4、n; /continue to write from the leftreturn n;ssize_t readline(int fd, void * vptr, size_t maxlen)ssize_t n, rc;char c, *ptr;ptr = vptr;for (n = 1; n < maxlen; n+)again:if (rc = read(fd, &c, 1) = 1)*ptr+ = c;if (c = 'n')break;else if (rc = 0) *ptr = 0;return (n - 1);elseif (errno = EINT

5、R)goto again;return (-1);*ptr = 0;return (n);int Socket(int domain, int type, int protocol)int sockfd;if (sockfd = socket(domain, type, protocol) < 0)fprintf(stderr, "socket errorn");exit(1);return sockfd;int Accept(int sockfd, struct sockaddr * addr, socklen_t * addrlen)int ret;if (ret

6、 = accept(sockfd, addr, addrlen) < 0)fprintf(stderr, "accept errorn");exit(1);return ret;int Bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen)int ret;if (ret = bind(sockfd, addr, addrlen) < 0)fprintf(stderr, "bind errorn");exit(1);return ret;int Listen(int so

7、ckfd, int backlog)int ret;if (ret = listen(sockfd, backlog) < 0)fprintf(stderr, "listen errorn");exit(1);return ret;int Close(int fd)int ret;if (ret = close(fd) < 0)fprintf(stderr, "close errorn");exit(1);return ret;void *create_thread(int connfd)charbuffBUFFERSIZE + 1;char

8、filenameBUFFERSIZE + 1;charcdBUFFERSIZE+1;intfilefd; /* file descriptor */intcount;DIR*dir;struct dirent*ptr;charchoose10;printf("readinging filename.n");if (readline(connfd, buff, BUFFERSIZE) < 0)fprintf(stderr, "readline errorn");exit(1);buffstrlen(buff) - 1 = 0; /* change &

9、#39;n' to NUL */memcpy(filename, buff, BUFFERSIZE + 1);printf("will save to file: %sn", buff);/change the direct to store the fileprintf("Input the direct you want to store %s:n", buff);scanf("%s", cd);if(chdir(cd) < 0)fprintf(stderr, "direct errorn");e

10、xit(1);/judge whether have the filename or notdir = opendir(cd);while(ptr = readdir(dir) != NULL)if(strcmp(buff, ptr->d_name) = 0)printf("Already have the %sn", buff);printf("If you want to rename, please input 'yes', or you can input 'no'n");scanf("%s&quo

11、t;, choose);if(strcmp(choose, "yes") = 0)printf("You can rename:t");scanf("%s", buff);elseprintf("Already have the file, now exit!n");exit (1);filefd = open(buff, O_WRONLY | O_CREAT);if (filefd < 0)fprintf(stderr, "can't open the file: %sn", b

12、uff);exit(1);printf("which thread is %dn",connfd);while(count = read(connfd, buff, BUFFERSIZE)if (count < 0)fprintf(stderr, "connfd read errorn");exit(1);if (writen(filefd, buff, count) < 0) fprintf(stderr, "writing to filefd errorn");exit(1);closedir(dir);Close(f

13、ilefd);Close(connfd);printf("file %s received!n", filename);int main()intlistenfd, connfdFD_MAX,i = 0,j;charbuffBUFFERSIZE + 1;charfilenameBUFFERSIZE + 1;charcdBUFFERSIZE+1;charchoose10;struct sockaddr_inservaddr, cliaddr;intcliaddrlen;intfilefd; /* file descriptor */DIR*dir;struct dirent*

14、ptr;listenfd = Socket(AF_INET, SOCK_STREAM, 0);bzero(&servaddr, sizeof(servaddr);servaddr.sin_family = AF_INET;servaddr.sin_addr.s_addr = INADDR_ANY;servaddr.sin_port = htons(PORT);Bind(listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr);Listen(listenfd, LISTENQ);pthread_tchild_thread;p

15、thread_attr_tchild_thread_attr;pthread_attr_setdetachstate(&child_thread_attr,PTHREAD_CREATE_DETACHED);/while(1)printf("listening.n");cliaddrlen = sizeof(cliaddr);printf("i is %d n", i);connfdi = Accept(listenfd, (struct sockaddr *)&cliaddr, &cliaddrlen);if(pthread_cr

16、eate(&child_thread,&child_thread_attr,create_thread,(void *)connfdi)<0)printf("pthread_create Failed:%sn",strerror(errno);i+;Close(listenfd);pthread_attr_destroy(&child_thread_attr); pthread_exit (NULL);return 0;/客户端#include <stdio.h>#include <stdlib.h>#include &

17、lt;unistd.h>#include <sys/socket.h>#include <netinet/in.h>#include <string.h>#include <arpa/inet.h>#include <errno.h>#include <sys/types.h>#include <sys/wait.h>#include <signal.h>#include <fcntl.h>#define LISTENQ 20#define MAXLINE 40#define BU

18、FFERSIZE 4096#define PORT 3336ssize_t writen(int fd, const void * vptr, size_t n)size_t nleft;ssize_t nwritten;const char * ptr;ptr = vptr;nleft = n;while (nleft > 0) if (nwritten = write(fd, ptr, nleft) <= 0) if (nwritten < 0 && errno = EINTR) nwritten = 0;else return -1;nleft -= n

19、written;ptr += nwritten;return n;int Socket(int domain, int type, int protocol)int sockfd;if (sockfd = socket(domain, type, protocol) < 0) fprintf(stderr, "socket errorn");exit(1);return sockfd;int Connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen)int ret;if (ret = conn

20、ect(sockfd, addr, addrlen) < 0) fprintf(stderr, "connect errorn");exit(1);return ret;int Close(int fd)int ret;if (ret = close(fd) < 0) fprintf(stderr, "close errorn");exit(1);return ret;int main(int argc, char *argv)if (argc != 3) fprintf(stderr, "Usage: ./fileclient &

21、lt;file> <serverIP>n");exit(1);int sockfd;char buffBUFFERSIZE + 1;char filenameheaderBUFFERSIZE + 1;struct sockaddr_in servaddr;int filefd; /* file descriptor */int count;sockfd = Socket(AF_INET, SOCK_STREAM, 0);bzero(&servaddr, sizeof(servaddr);servaddr.sin_family = AF_INET;servaddr.sin_addr.s_addr=INADDR_ANY;servaddr.sin_port = htons(PORT);printf("connecting.n");Connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr);pr