new pull

TMP/Practice/lecture23.10/server.c

@@ -10,17 +10,19 @@
 
 #define SOCK_PATH "tpf_unix_sock.server"
 
-int main(void){
- int server_sock, rc;
- socklen_t len;
- int bytes_rec = 0;
- struct sockaddr_un server_sockaddr, peer_sock;
- char buf[256];
- memset(&server_sockaddr, 0, sizeof(struct sockaddr_un));
+int main(void)
+{
+    int server_sock, rc;
+    socklen_t len;
+    int bytes_rec = 0;
+    struct sockaddr_un server_sockaddr, peer_sock;
+    char buf[256];
+    memset(&server_sockaddr, 0, sizeof(struct sockaddr_un));
     memset(buf, 0, 256);
 
     server_sock = socket(AF_UNIX, SOCK_DGRAM, 0);
-    if (server_sock == -1){
+    if (server_sock == -1)
+    {
         perror("socket");
         exit(1);
     }
@@ -29,28 +31,28 @@ int main(void){
     strcpy(server_sockaddr.sun_path, SOCK_PATH);
     len = sizeof(server_sockaddr);
     unlink(SOCK_PATH);
-    rc = bind(server_sock, (struct sockaddr *) &server_sockaddr, len);
-    if (rc == -1){
+    rc = bind(server_sock, (struct sockaddr *)&server_sockaddr, len);
+    if (rc == -1)
+    {
         perror("bind");
         close(server_sock);
         exit(1);
     }
 
-
     printf("waiting to recvfrom...\n");
-    bytes_rec = recvfrom(server_sock, buf, 256, 0, (struct sockaddr *) &peer_sock, &len);
-    if (bytes_rec == -1){
+    bytes_rec = recvfrom(server_sock, buf, 256, 0, (struct sockaddr *)&peer_sock, &len);
+    if (bytes_rec == -1)
+    {
         perror("recv");
         close(server_sock);
         exit(1);
     }
-    else {
-       printf("DATA RECEIVED = %s\n", buf);
+    else
+    {
+        printf("DATA RECEIVED = %s\n", buf);
     }
 
-
     close(server_sock);
 
     return 0;
 }
-

TMP/Practice/lecture23.10/socket.c

@@ -1,15 +1,16 @@
-#include<sys/types.h>
-#include<sys/socket.h>
-#include<netinet/in.h>
-#include<netdb.h>
-#include<stdio.h>
-#include<stdlib.h>
-#include<unistd.h>
-#include<string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
 
 #define DATA "exit"
 
-int main(int argc, char *argv[]){
+int main(int argc, char *argv[])
+{
     int sock;
     socklen_t length;
     struct sockaddr_in server;
@@ -17,12 +18,13 @@ int main(int argc, char *argv[]){
     char buf[1024];
     int rval;
     sock = socket(AF_INET, SOCK_STREAM, 0);
-    if(sock == -1){
+    if (sock == -1)
+    {
         perror("opening stream socket");
         exit(1);
     }
     server.sin_family = AF_INET;
-    server.sin_addr.s_addr = htoml(INADDR_ANY;
+    server.sin_addr.s_addr = htoml(INADDR_ANY);
     if(argc == 2){
         server.sin_port = htons(atoi(argv[1]));
     }
@@ -41,23 +43,27 @@ int main(int argc, char *argv[]){
     printf("socket port %d\n", ntohs(server.sin_port));
     listen(sock, 5);
     do{
-        if((msgsock = accept(sock,(struct sockaddr *) NULL, (socklen_t *) NULL)) == -1){
+        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)
+            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){
+                if (rval == 0)
+                {
                     printf("connecting finished\n");
                 }
-                else{
-                    dprintf(1,"[%s]\n", buf);
+                else
+                {
+                    dprintf(1, "[%s]\n", buf);
                 }
-            }while((rval > 0) && (strcmp(buf,FIN)));
-            close(msgsock);
+            } while ((rval > 0) && (strcmp(buf, FIN)));
+        close(msgsock);
 
     }while(strcmp(buf,FIN));
     exit(0);

TMP/Practice/sem25.10/c_inet.c

@@ -0,0 +1,57 @@
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+//./client_app stud*** "port"
+
+#define DATA "Hello, World!"
+ 
+int main(int argc, char *argv[]){
+  int sock;
+  struct sockaddr_in server;
+  struct hostent *hp;
+  char buf[1024];
+
+  if (argc < 3) {
+     printf("c_inet hostname port [data]\n");
+     _exit(1);
+  }
+ 
+  if((sock = socket( AF_INET, SOCK_STREAM, 0)) == -1) {
+     perror("opening stream socket");
+     exit(1);
+  }
+
+  hp=malloc(sizeof(struct hostent));
+
+  server.sin_family = AF_INET;
+  hp = gethostbyname(argv[1]);
+  if (hp == (struct hostent *) 0) {
+     fprintf(stderr, "%s: unknown host\n", argv[1]);
+     exit(2);
+  }
+  memcpy((char *) &server.sin_addr, (char *) hp->h_addr, hp->h_length);
+  server.sin_port = htons(atoi(argv[2]));
+  if (connect(sock, (struct sockaddr *) &server, sizeof server) == -1) {
+    perror("connecting stream socket");
+    exit(1);
+  }
+  getchar();
+  memset(buf,0,1024);
+  if (argc > 3){
+    printf("[%s]\n",argv[3]);
+    strcpy(buf,argv[3]);
+  }else{
+    strcpy(buf,DATA);
+  }
+  if (write(sock, buf, strlen(buf)) == -1)
+     perror("writing on stream socket");
+  close(sock);
+  exit(0);
+}
+

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);
+}
+