added lecture

TMP/Practice/lecture23.10/server.c

@@ -0,0 +1,56 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <error.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+
+#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));
+    memset(buf, 0, 256);
+    
+    server_sock = socket(AF_UNIX, SOCK_DGRAM, 0);
+    if (server_sock == -1){
+        perror("socket");
+        exit(1);
+    }
+
+    server_sockaddr.sun_family = AF_UNIX;
+    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){
+        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){
+        perror("recv");
+        close(server_sock);
+        exit(1);
+    }
+    else {
+       printf("DATA RECEIVED = %s\n", buf);
+    }
+    
+
+    close(server_sock);
+
+    return 0;
+}
+