Make the server ip a parameter

simple-client/build/Makefile

+ARM_CC = arm-linux-gnueabihf-gcc
+ARM_PROG = main_arm
 PROG = main
 SRCDIR = ../src
 
@@ -15,6 +17,14 @@ CFLAGS += -std=gnu99
 vpath %.c $(SRCDIR)
 
 
+$(ARM_PROG): FORCE
+	make clean
+	$(eval CC:=arm-linux-gnueabihf-gcc)
+	make $(PROG)
+	mv $(PROG) $(ARM_PROG)
+
+FORCE:
+
 $(PROG): $(OBJS)
 	$(CC) $(LDFLAGS) $^ -o $@
 
@@ -26,4 +36,4 @@ run: $(PROG)
 clean:
 	$(RM) $(OBJS) $(PROG) $(subst .c,.d,$(SRCS))
 
-.PHONY: clean
+.PHONY: clean FORCE

simple-client/src/main.c

@@ -3,10 +3,15 @@
 #include "getip.h"
 #include "send_packet.h"
 
-int main() {
+int main(int argc, char * argv[]) {
+
+  if( argc != 2) {
+    printf("Usage: %s server_ip\n", argv[0]);
+    return -1;
+  }
 
   for(int i = 0; i < 100; i++)
-    send_udp_packet();
+    send_udp_packet(argv[1]);
 
   return 0;
 }

simple-client/src/send_packet.c

 #include "send_packet.h"
 
-/*
-#include <netinet/in.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <sys/types.h>
-*/
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
@@ -20,10 +12,9 @@
 
 #include <arpa/inet.h>
 
-#define SERVER_IP "192.168.0.100"
 #define SERVER_PORT "50000"
 
-int send_udp_packet(void) {
+int send_udp_packet(const char * server_ip) {
   int status;
   int sockfd;
 
@@ -37,7 +28,7 @@ int send_udp_packet(void) {
   hints.ai_family = AF_UNSPEC;
   hints.ai_socktype = SOCK_DGRAM;
 
-  status = getaddrinfo(SERVER_IP, SERVER_PORT, &hints, &servinfo);
+  status = getaddrinfo(server_ip, SERVER_PORT, &hints, &servinfo);
   if( status != 0 ) {
     fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(status));
     printf("getaddrinfo error, exiting...\n");
@@ -66,7 +57,7 @@ int send_udp_packet(void) {
 
   freeaddrinfo(servinfo);
 
-  printf("Sent %d bytes to %s\n", bytes_sent, SERVER_IP);
+  printf("Sent %d bytes to %s\n", bytes_sent, server_ip);
   close(sockfd);
   return 0;
 }

simple-client/src/send_packet.h

 #ifndef SEND_PACKET_H
 #define SEND_PACKET_H
 
-int send_udp_packet(void);
+int send_udp_packet(const char * ip4);
 
 #endif