updated api tests

tests/api_test/udpserver4.c

@@ -0,0 +1,83 @@
+// UDP Server test program
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h> 
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#define MAXBUF 1024*1024
+
+void echo( int sd ) {
+  char bufin[MAXBUF];
+  struct sockaddr_in remote;
+  int n;
+  socklen_t len = sizeof(remote);
+  long count = 0;
+
+  while (1) {
+    usleep(50);
+    count++;
+    // read a datagram from the socket (put result in bufin)
+    n=recvfrom(sd,bufin,MAXBUF,0,(struct sockaddr *)&remote,&len);
+    // print out the address of the sender
+    printf("DGRAM from %s:%d\n", inet_ntoa(remote.sin_addr), ntohs(remote.sin_port));
+
+    if (n<0) {
+      perror("Error receiving data");
+    } else {
+      printf("GOT %d BYTES (count = %ld)\n", n, count);
+      // Got something, just send it back
+      // sendto(sd,bufin,n,0,(struct sockaddr *)&remote,len);
+    }
+  }
+}
+
+int main(int argc, char *argv[]) {
+
+  if(argc < 2) {
+    printf("usage: udp_server <port>\n");
+    return 0;
+  }
+  int ld, port = atoi(argv[1]);
+  socklen_t len;
+  struct sockaddr_in skaddr;
+  struct sockaddr_in skaddr2;
+
+  // Create socket
+  if ((ld = socket( PF_INET, SOCK_DGRAM, 0)) < 0) {
+    printf("error creating socket\n");
+    return 0;
+  }
+  // Create address
+  skaddr.sin_family = AF_INET;
+  skaddr.sin_addr.s_addr = htonl(INADDR_ANY);
+  skaddr.sin_port = htons(port);
+  // Bind to address
+  if (bind(ld, (struct sockaddr *) &skaddr, sizeof(skaddr))<0) {
+    printf("error binding\n");
+    return 0;
+  }
+  // find out what port we were assigned
+  len = sizeof( skaddr2 );
+  if (getsockname(ld, (struct sockaddr *) &skaddr2, &len)<0) {
+    printf("error getsockname\n");
+    return 0;
+  }
+  // Display address:port to verify it was sent over RPC correctly
+  port = ntohs(skaddr2.sin_port);
+  int ip = skaddr2.sin_addr.s_addr;
+  unsigned char d[4];
+  d[0] = ip & 0xFF;
+  d[1] = (ip >>  8) & 0xFF;
+  d[2] = (ip >> 16) & 0xFF;
+  d[3] = (ip >> 24) & 0xFF;
+  printf("bound to address: %d.%d.%d.%d : %d\n", d[0],d[1],d[2],d[3], port);
+          
+  // RX
+  echo(ld);
+  return(0);
+}