Added getopt to select mode #1; Added udpserver #2

udpserver.c

@@ -0,0 +1,94 @@
+#include<stdio.h> //printf
+#include<string.h> //memset, strtok
+#include<stdlib.h> //exit(0);
+#include<arpa/inet.h>
+#include<sys/socket.h>
+#include <unistd.h> //close()
+
+#include "udpserver.h"
+#include "sound.h"
+#include "config.h"
+
+#define BUFLEN 512  //Max length of buffer
+//#define PORT 8888 
+
+
+#include "udpserver.h"
+void die(char *s)
+{
+    perror(s);
+    //exit(1);
+}
+
+ 
+void udpserver(void)
+{
+    struct sockaddr_in si_me, si_other;
+    
+    int PORT = cfgreadudpport();
+    
+    int s, slen = sizeof(si_other) , recv_len;
+    char buf[BUFLEN];
+     
+    //create a UDP socket
+    if ((s=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
+    {
+        die("socket");
+    }
+     
+    // zero out the structure
+    memset((char *) &si_me, 0, sizeof(si_me));
+     
+    si_me.sin_family = AF_INET;
+    si_me.sin_port = htons(PORT);
+    si_me.sin_addr.s_addr = htonl(INADDR_ANY);
+     
+    //bind socket to port
+    if( bind(s , (struct sockaddr*)&si_me, sizeof(si_me) ) == -1)
+    {
+        die("bind");
+    }
+     
+    //keep listening for data
+    while(1)
+    {
+        //printf("Waiting for data...");
+        //fflush(stdout);
+        memset(buf,'\0', BUFLEN);
+        //try to receive some data, this is a blocking call
+        if ((recv_len = recvfrom(s, buf, BUFLEN, 0, (struct sockaddr *) &si_other, (unsigned int *)&slen)) == -1)
+        {
+            die("recvfrom()");
+        }
+         
+        //print details of the client/peer and the data received
+        printf("Received packet from %s:%d\n", inet_ntoa(si_other.sin_addr), ntohs(si_other.sin_port));
+        printf("Data: %s\n" , buf);
+        
+        if (!processUDPInput(buf)) {
+            break;
+        }
+        
+        //now reply the client with the same data
+        if (sendto(s, buf, recv_len, 0, (struct sockaddr*) &si_other, slen) == -1)
+        {
+            die("sendto()");
+        }
+    }
+ 
+    close(s);
+}
+
+int processUDPInput(char *input) {
+    /**
+     * Returns 0 on exit
+     * Return 1 on success
+     */
+    
+    if (strcmp(input, "exit") == 0) {
+        return 0;
+    }
+    playSound(lookupSounds(input[0]));
+    return 1;
+}
+