init with documents from eunomia-bpf

6-sigsnoop/eunomia-include/helpers.h

@@ -0,0 +1,54 @@
+#ifndef EWASM_APP_HELPERS_H_
+#define EWASM_APP_HELPERS_H_
+
+#include "native-ewasm.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include "cJSON/cJSON.h"
+
+/// @brief start the eBPF program with JSON and wait for it to exit
+/// @param program_data the json data of eBPF program
+/// @return 0 on success, -1 on failure, the eBPF program will be terminated in failure case
+int
+start_bpf_program(char *program_data)
+{
+    int res = create_bpf(program_data, strlen(program_data));
+    if (res < 0) {
+        printf("create_bpf failed %d", res);
+        return -1;
+    }
+    res = run_bpf(res);
+    if (res < 0) {
+        printf("run_bpf failed %d\n", res);
+        return -1;
+    }
+    res = wait_and_poll_bpf(res);
+    if (res < 0) {
+        printf("wait_and_poll_bpf failed %d\n", res);
+        return -1;
+    }
+    return 0;
+}
+
+/// @brief set the global variable of bpf program to the value
+/// @param program the json program data
+/// @param key global
+/// @param value arg value
+/// @return new eBPF program
+cJSON *
+set_bpf_program_global_var(cJSON *program, char *key, cJSON *value)
+{
+
+    cJSON *args = cJSON_GetObjectItem(program, "runtime_args");
+    if (args == NULL)
+    {
+        args = cJSON_CreateObject();
+        cJSON_AddItemToObject(program, "runtime_args", args);
+    }
+    cJSON_AddItemToObject(args, key, value);
+    return program;
+}
+
+#endif // EWASM_APP_INIT_H