first working net solution

Makefile

@@ -1,17 +1,17 @@
 
 
-all: bin/test bin/main
+all:  bin/netsl
 
 
 #bin/net: net.c
 #	mkdir -pv bin
 #	gcc -o bin/net net.c
 
-bin/test: test.c
-	mkdir -pv bin
-	gcc -o bin/test test.c
+#bin/test: test.c
+#	mkdir -pv bin
+#	gcc -o bin/test test.c
 
-bin/main: main.c net.c
+bin/netsl: misc.h main.c net.c
 	mkdir -pv bin
 	gcc -o bin/main main.c
 

main.c

@@ -57,6 +57,10 @@ int parseArgs(struct prog_info *pinfo, int argc, char **argv) {
 	return 0;
 }
 
+void callback(long tst) {
+	printf("in callback, tst=%ld\n", tst);
+}
+
 int main(int argc, char **argv) {
 
 	int ret;
@@ -69,6 +73,7 @@ int main(int argc, char **argv) {
 		} else {
 			printf("running in CLIENT mode, using client number %d\n", prog_info.client_num);
 			// ...
+			ret = run_client(&prog_info, callback);
 		}
 
 	}

net.c

@@ -28,8 +28,9 @@ void *get_in_addr(struct sockaddr *sa)
 }
 
 int run_server(const struct prog_info *pinfo) {
-	struct addrinfo hints, *servinfo;
+	struct addrinfo hints, *servinfo, *p;
 	int ret;
+	int sockfd;
 
 	char portbuf[6];
 	memset(&hints, 0, sizeof(hints));
@@ -38,19 +39,52 @@ int run_server(const struct prog_info *pinfo) {
 
 	sprintf(portbuf, "%d", pinfo->port);
 	if ((ret=getaddrinfo("0.0.0.0", portbuf, &hints, &servinfo)) != 0) {
-		fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
+		fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(ret));
 	        return 1;
 	}
 // ...
 
+	 for(p = servinfo; p != NULL; p = p->ai_next) {
+	 	if ((sockfd = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1) {
+	    	perror("talker: socket");
+    	    continue;
+        }
+		break;
+	}
+
+	if (p == NULL) {
+		fprintf(stderr, "talker: failed to bind socket\n");
+		return 2;
+	}
+
+	struct timespec tim;
+	tim.tv_sec = 0;
+	tim.tv_nsec = 500000000;
+
+	for (;;) {
+		printf("sending...\n");
+		int numbytes;
+		if ((numbytes = sendto(sockfd, "bla", 3, 0, p->ai_addr, p->ai_addrlen)) == -1) {
+			perror("error sending");
+			return -44;
+		}
+		nanosleep(&tim, NULL);
+	}
+
+	freeaddrinfo(servinfo);
+
+	close(sockfd);
+
 	return 0;
 }
 
-int run_client(const struct prog_info *pinfo) {
+int run_client(const struct prog_info *pinfo, void (*framecallback)(long) ) {
 
 	struct addrinfo hints, *servinfo;
 	char portbuf[6];
 
+	//framecallback(123);
+
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = AF_INET;      // IPv4
 	hints.ai_socktype = SOCK_DGRAM; // UDP
@@ -111,7 +145,11 @@ int run_client(const struct prog_info *pinfo) {
 		printf("listener: packet is %d bytes long\n", numbytes);
 		buf[numbytes] = '\0';
 		printf("listener: packet contains \"%s\"\n", buf);
+
+		framecallback(123);
+
 	} while (strncmp(buf, "exit", 10000));
+	
 
 
 	close(sockfd);

test.c

@@ -1,67 +0,0 @@
-/*
-** talker.c -- a datagram "client" demo
-*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-
-#define SERVERPORT "4711"    // the port users will be connecting to
-
-int main(int argc, char *argv[])
-{
-    int sockfd;
-    struct addrinfo hints, *servinfo, *p;
-    int rv;
-    int numbytes;
-
-    if (argc != 3) {
-        fprintf(stderr,"usage: talker hostname message\n");
-        exit(1);
-    }
-
-    memset(&hints, 0, sizeof hints);
-    hints.ai_family = AF_UNSPEC;
-    hints.ai_socktype = SOCK_DGRAM;
-
-    if ((rv = getaddrinfo(argv[1], SERVERPORT, &hints, &servinfo)) != 0) {
-        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
-        return 1;
-    }
-
-    // loop through all the results and make a socket
-    for(p = servinfo; p != NULL; p = p->ai_next) {
-        if ((sockfd = socket(p->ai_family, p->ai_socktype,
-                p->ai_protocol)) == -1) {
-            perror("talker: socket");
-            continue;
-        }
-
-        break;
-    }
-
-    if (p == NULL) {
-        fprintf(stderr, "talker: failed to bind socket\n");
-        return 2;
-    }
-
-    if ((numbytes = sendto(sockfd, argv[2], strlen(argv[2]), 0,
-             p->ai_addr, p->ai_addrlen)) == -1) {
-        perror("talker: sendto");
-        exit(1);
-    }
-
-    freeaddrinfo(servinfo);
-
-    printf("talker: sent %d bytes to %s\n", numbytes, argv[1]);
-    close(sockfd);
-
-    return 0;
-}