Completed detachment of probes, enabling to attach and detach at will. Work needs to be done with xdp tho

src/user/include/modules/module_manager.h

@@ -22,6 +22,4 @@ typedef struct module_config_t{
 
 extern module_config_t module_config;
 
-
-
 #endif

src/user/include/modules/sched.h

@@ -5,6 +5,7 @@
 #include <bpf/libbpf.h>
 #include "xdp_filter.skel.h"
 
+//Connections
 int attach_handle_sched_process_exec(struct xdp_filter_bpf *skel){
     skel->links.handle_sched_process_exec = bpf_program__attach(skel->progs.handle_sched_process_exec);
 	return libbpf_get_error(skel->links.handle_sched_process_exec);
@@ -15,4 +16,17 @@ int attach_sched_all(struct xdp_filter_bpf *skel){
 }
 
 
+//Disconnections
+int detach_link_generic(struct bpf_link *link){
+    int ret = bpf_link__destroy(link);
+    if(ret!=0){
+        return -1;
+    }
+    return 0;
+}
+int detach_sched_all(struct xdp_filter_bpf *skel){
+    return detach_link_generic(skel->links.handle_sched_process_exec);
+}
+
+
 #endif

src/user/include/modules/xdp.h

@@ -46,9 +46,10 @@ int attach_xdp_all(struct xdp_filter_bpf *skel, __u32 ifindex, __u32 flags){
     return 0;
 }
 
-int detach_xdp_all(__u32 fd, __u32 ifindex, __u32 flags){
+int detach_xdp_all(__u32 ifindex, __u32 fd, __u32 flags){
     int err = bpf_set_link_xdp_fd(ifindex, fd, flags);
     if(err<0){
+        perror("j");
         fprintf(stderr, "Failed to detach XDP program\n");
 		return -1;
     }

src/user/xdp_filter.c

@@ -223,8 +223,46 @@ int main(int argc, char**argv){
 	}
 
 	//Received signal to stop, detach program from network interface
-	detach_xdp_all(-1, ifindex, flags);
+	err = detach_sched_all(skel);
+	if(err<0){
+		perror("ERR");
+		goto cleanup;
+	}
+	printf("A:%i", err);fflush(stdout);
+	detach_xdp_all(ifindex, -1, flags);
 	
+	sleep(2);
+
+	err = attach_sched_all(skel);
+	if(err<0){
+		perror("ERR");
+		goto cleanup;
+	}
+	printf("B:%i", err);fflush(stdout);
+
+	exiting = false;
+	while (!exiting) {
+		err = ring_buffer__poll(rb, 100 /* timeout, ms */);
+		
+		//Checking if a signal occured
+		if (err == -EINTR) {
+			err = 0;
+			break;
+		}
+		if (err < 0) {
+			printf("Error polling ring buffer: %d\n", err);
+			break;
+		}
+	}
+	
+	err = detach_sched_all(skel);
+	if(err<0){
+		perror("ERR");
+		goto cleanup;
+	}
+	printf("C:%i", err);fflush(stdout);
+
+	sleep(2);
 
     cleanup:
 		ring_buffer__free(rb);