new pull

TMP/Practice/sem25.10/s_inet.c

@@ -0,0 +1,62 @@
+#include <netinet/in.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define FIN "exit"
+
+int main(int argc, char *argv[]) {
+   int sock;
+   socklen_t length;
+   struct sockaddr_in server;
+   int msgsock;
+   char buf[1024];
+   int rval;
+ 
+   sock = socket(AF_INET, SOCK_STREAM, 0);
+   if (sock == -1) {
+      perror("opening stream socket");
+      exit(1);
+   }
+   
+   server.sin_family = AF_INET;
+   server.sin_addr.s_addr = htonl(INADDR_ANY);
+   if(argc == 2) server.sin_port = htons(atoi(argv[1]));
+   else server.sin_port = 0;
+   
+   if (bind(sock, (struct sockaddr *) &server, sizeof server)  == -1) {
+      perror("binding stream socket");
+      exit(1);
+   }
+
+   length = sizeof server;
+   if (getsockname(sock,(struct sockaddr *) &server, &length) == -1) {
+      perror("getting socket name");
+      exit(1);
+   }
+   printf("Socket port %d\n", ntohs(server.sin_port));
+
+   listen(sock, 5);
+   do {
+      if ((msgsock = accept(sock,(struct sockaddr *) NULL,(socklen_t *) NULL)) == -1) 
+         perror("accept");
+      else 
+      do {
+         memset(buf, 0, sizeof buf);
+         if ((rval = read(msgsock, buf, 1024)) == -1)
+            perror("reading stream message");
+         dprintf(1,"-[%d]\n",rval);
+         if (rval == 0)
+            printf("Connection finished\n");
+         else{
+            dprintf(1,"[%s]\n",buf);
+         }
+//         if (!strcmp(buf,FIN)) {break;}
+      } while ((rval > 0) && (strcmp(buf,FIN)));
+      close(msgsock);
+   } while(strcmp(buf,FIN));
+   exit(0);
+}
+