initial commit

third_party/libhv/examples/udp_echo_server.c

@@ -0,0 +1,73 @@
+/*
+ * udp echo server
+ *
+ * @build   make examples
+ * @server  bin/udp_echo_server 1234
+ * @client  bin/nc -u 127.0.0.1 1234
+ *          nc     -u 127.0.0.1 1234
+ *
+ */
+
+#include "hloop.h"
+#include "hsocket.h"
+
+/*
+ * @test    kcp_server
+ * #define  TEST_KCP 1
+ *
+ * @build   ./configure --with-kcp && make clean && make
+ * @server  bin/udp_echo_server 1234
+ * @client  bin/nc -k 127.0.0.1 1234
+ *
+ */
+#define TEST_KCP 0
+
+static void on_recvfrom(hio_t* io, void* buf, int readbytes) {
+    printf("on_recvfrom fd=%d readbytes=%d\n", hio_fd(io), readbytes);
+    char localaddrstr[SOCKADDR_STRLEN] = {0};
+    char peeraddrstr[SOCKADDR_STRLEN] = {0};
+    printf("[%s] <=> [%s]\n",
+            SOCKADDR_STR(hio_localaddr(io), localaddrstr),
+            SOCKADDR_STR(hio_peeraddr(io), peeraddrstr));
+
+    char* str = (char*)buf;
+    printf("< %.*s", readbytes, str);
+    // echo
+    printf("> %.*s", readbytes, str);
+    hio_write(io, buf, readbytes);
+
+#if TEST_KCP
+    if (strncmp(str, "CLOSE", 5) == 0) {
+        hio_close_rudp(io, hio_peeraddr(io));
+    }
+#endif
+}
+
+int main(int argc, char** argv) {
+    if (argc < 2) {
+        printf("Usage: %s port|path\n", argv[0]);
+        return -10;
+    }
+    const char* host = "0.0.0.0";
+    int port = atoi(argv[1]);
+#if ENABLE_UDS
+    if (port == 0) {
+        host = argv[1];
+        port = -1;
+    }
+#endif
+
+    hloop_t* loop = hloop_new(0);
+    hio_t* io = hloop_create_udp_server(loop, host, port);
+    if (io == NULL) {
+        return -20;
+    }
+#if TEST_KCP
+    hio_set_kcp(io, NULL);
+#endif
+    hio_setcb_read(io, on_recvfrom);
+    hio_read(io);
+    hloop_run(loop);
+    hloop_free(&loop);
+    return 0;
+}