initial version made by removing all csp stuff from cspemu

components/ping/include/ping.h

@@ -0,0 +1,58 @@
+/**
+ * Ping library, used to test connectivity
+ */
+
+#ifndef _PING_H
+#define _PING_H
+
+#include "lwip/ip.h"
+#include "sdkconfig.h"
+
+typedef void (*ping_success_print_cb_t)(int bytes, const char *ip, int seq, int elapsed_ms);
+typedef void (*ping_fail_print_cb_t)(int seq);
+
+/** Ping options */
+typedef struct {
+    ip4_addr_t ip_addr;    // dest IP addr
+    uint16_t count;        // number of requests to send
+    uint16_t interval_ms;  // delay between requests
+    uint16_t payload_size; // extra payload size
+    uint16_t timeout_ms;   // ping timeout in ms
+    ping_success_print_cb_t success_cb;
+    ping_fail_print_cb_t fail_cb;
+} ping_opts_t;
+
+/** Ping response struct */
+typedef struct {
+    int sockfd;           // fd of the used socket, may be closed externally to abort the operation
+    uint16_t sent;        // number of sent echo requests
+    uint16_t received;    // number of received responses
+    uint16_t min_time_ms; // shortest ping
+    uint16_t max_time_ms; // longest ping
+    float loss_pt;        // loss ratio in percent
+} ping_result_t;
+
+/** init all except the ip addr */
+#define PING_CONFIG_DEFAULT() { \
+    .count = 5, \
+    .interval_ms = 1000, \
+    .payload_size = 32, \
+    .timeout_ms = 1000,         \
+    .success_cb = NULL,         \
+    .fail_cb = NULL, \
+}
+
+/**
+ * Send a ping request to a remote server.
+ * Parameters, including the IPv4 address, are specified in the config struct.
+ *
+ * Ping is blocking. The operation may be interrupted by closing the socket from another task,
+ * its FD is exposed from the beginning in result->sockfd.
+ *
+ * @param opts
+ * @param result - response struct, required, for storing statistics
+ * @return success or error
+ */
+esp_err_t ping(const ping_opts_t *opts, ping_result_t *result);
+
+#endif //_PING_H