108 lines
3.7 KiB
C
108 lines
3.7 KiB
C
// server1 - server program for demonstrating data transfer over TCP/IP
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// This program complies with the GNU Coding Standards found here:
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// https://www.gnu.org/prep/standards/html_node/index.html
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include <time.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <strings.h>
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#define BUFFERT 512
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#define BACKLOG 1
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int create_server_socket (int port);
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struct sockaddr_in sock_serv,sock_clt;
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int main(int argc, char** argv)
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{
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int sfd, fd;
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unsigned int length = sizeof(struct sockaddr_in);
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long int n, m, count = 0;
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unsigned int nsid;
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ushort clt_port;
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char buffer[BUFFERT], filename[256];
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char dst[INET_ADDRSTRLEN];
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time_t intps;
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struct tm* tmi;
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/* (A) repalce the following line with suitable getopt() functionality */
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if(argc!=2) {perror("Usage ./a.out <num_port> <file2send>\n");exit(3);}
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int l;
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int yes=1;
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/* The following function call should use; Internet version 4 protocols with a sequenced, reliable, two-way connection based byte streams */
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sfd = socket( /* Q) What goes here? */ , /* Q) What goes here? */ , 0);
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/* See; man socket */
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if (sfd == -1) {perror("socket fail");return EXIT_SUCCESS;}
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if(setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR,&yes,sizeof(int)) == -1 ) {perror("setsockopt erreur");exit(5);}
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l = sizeof(struct sockaddr_in);
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bzero(&sock_serv,l);
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/* The following assignment should use; Internet version 4 protocols constant */
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sock_serv.sin_family=/* Q) What goes here? */;
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/* See; man socket */
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sock_serv.sin_port = htons(atoi(argv[1]));
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/* Set the IP address to allow connections on any network interface on the server */
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sock_serv.sin_addr.s_addr = htonl(/* Q) What goes here? */);
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/* See; man 4 ip */
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if (bind(sfd,(struct sockaddr*)&sock_serv,l) == -1) {perror("bind fail"); exit(EXIT_FAILURE);}
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bzero(buffer,BUFFERT);
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listen(sfd,BACKLOG);
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/* accept() takes "struct sockaddr_in" and returns non-negative integer that is a descriptor for the accepted socket.
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* The missing arguement in the line below will need to have the *address* of the variable required, as the value is updated when the socket is update. eg, &variable
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*/
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nsid = accept(sfd, (struct sockaddr*)&sock_clt, /* Q) What goes here? */);
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/* See; man 2 accept */
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if (nsid == -1) {perror("accept fail"); return EXIT_FAILURE;}
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else {
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if(inet_ntop(AF_INET,&sock_clt.sin_addr,dst,INET_ADDRSTRLEN)==NULL) {perror("erreur socket");exit (4);}
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clt_port=ntohs(sock_clt.sin_port);
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printf("connection : %s:%d\n",dst,clt_port);
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bzero(filename,256);
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intps = time(NULL);
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tmi = localtime(&intps);
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bzero(filename,256);
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sprintf(filename,"saved-file.%d.%d.%d.%d.%d.%d", tmi->tm_mday, tmi->tm_mon+1, 1900+tmi->tm_year, tmi->tm_hour, tmi->tm_min, tmi->tm_sec);
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printf("Creating the copied output file : %s\n", filename);
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if ((fd = open(filename, O_CREAT|O_WRONLY, 0600)) == -1) {perror("open fail"); exit (3);}
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bzero(buffer,BUFFERT);
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n=recv(nsid,buffer,BUFFERT,0);
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while(n) {
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if(n==-1) {perror("recv fail");exit(5);}
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if((m=write(fd,buffer,n))==-1) {perror("write fail");exit (6);}
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count=count+m;
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bzero(buffer,BUFFERT);
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n=recv(nsid,buffer,BUFFERT,0);
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}
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close(sfd);
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close(fd);
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}
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close(nsid);
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printf("End of transmission with %s.%d\n",dst,clt_port);
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/* Select the appropriate variable in the following function call argument */
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printf("Number of octets received : %ld \n", /* Q) What goes here? */);
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return EXIT_SUCCESS;
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}
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