1 files changed, 148 insertions, 0 deletions

diff --git a/tests/sockets/test_sockets_echo_client.c b/tests/sockets/test_sockets_echo_client.c
new file mode 100644
index 00000000..6b3ccef3
--- /dev/null
+++ b/tests/sockets/test_sockets_echo_client.c
@@ -0,0 +1,148 @@
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <assert.h>
+#if EMSCRIPTEN
+#include <emscripten.h>
+#endif
+
+#include "test_sockets_msg.h"
+
+// message to send to the server
+#ifndef MESSAGE
+#define MESSAGE "pingtothepong"
+#endif
+
+typedef enum {
+  MSG_READ,
+  MSG_WRITE
+} msg_state_t;
+
+typedef struct {
+  int fd;
+  msg_t msg;
+  msg_state_t state;
+} server_t;
+
+server_t server;
+msg_t echo_msg;
+int echo_read;
+int echo_wrote;
+
+void finish(int result) {
+  close(server.fd);
+#if EMSCRIPTEN
+  REPORT_RESULT();
+#endif
+  exit(result);
+}
+
+void main_loop(void *arg) {
+  static char out[1024*2];
+  static int pos = 0;
+  fd_set fdr;
+  fd_set fdw;
+  int res;
+
+  // make sure that server.fd is ready to read / write
+  FD_ZERO(&fdr);
+  FD_ZERO(&fdw);
+  FD_SET(server.fd, &fdr);
+  FD_SET(server.fd, &fdw);
+  res = select(64, &fdr, &fdw, NULL, NULL);
+  if (res == -1) {
+    perror("select failed");
+    finish(EXIT_FAILURE);
+  }
+
+  if (server.state == MSG_READ) {
+    if (!FD_ISSET(server.fd, &fdr)) {
+      return;
+    }
+
+    // as a test, confirm with ioctl that we have data available
+    // after selecting
+    int available;
+    res = ioctl(server.fd, FIONREAD, &available);
+    assert(res != -1);
+    assert(available);
+
+    res = do_msg_read(server.fd, &server.msg, echo_read, 0, NULL, NULL);
+    if (res != -1) echo_read += res;
+
+    // once we've read the entire message, validate it
+    if (echo_read >= server.msg.length) {
+      assert(!strcmp(server.msg.buffer, MESSAGE));
+      finish(EXIT_SUCCESS);
+    }
+  } else {
+    if (!FD_ISSET(server.fd, &fdw)) {
+      return;
+    }
+
+    res = do_msg_write(server.fd, &echo_msg, echo_wrote, 0, NULL, 0);
+    if (res != -1) echo_wrote += res;
+
+    // once we're done writing the message, read it back
+    if (echo_wrote >= echo_msg.length) {
+      server.state = MSG_READ;
+    }
+  }
+}
+
+int main() {
+  struct sockaddr_in addr;
+  int res;
+
+  memset(&server, 0, sizeof(server_t));
+  server.state = MSG_WRITE;
+
+  // setup the message we're going to echo
+  memset(&echo_msg, 0, sizeof(msg_t));
+  echo_msg.length = strlen(MESSAGE) + 1;
+  echo_msg.buffer = malloc(echo_msg.length);
+  strncpy(echo_msg.buffer, MESSAGE, echo_msg.length);
+
+  // create the socket and set to non-blocking
+#if !USE_UDP
+  server.fd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
+#else
+  server.fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
+#endif
+  if (server.fd == -1) {
+    perror("cannot create socket");
+    finish(EXIT_FAILURE);
+  }
+  fcntl(server.fd, F_SETFL, O_NONBLOCK);
+
+  // connect the socket
+  memset(&addr, 0, sizeof(addr));
+  addr.sin_family = AF_INET;
+  addr.sin_port = htons(SOCKK);
+  if (inet_pton(AF_INET, "127.0.0.1", &addr.sin_addr) != 1) {
+    perror("inet_pton failed");
+    finish(EXIT_FAILURE);
+  }
+  
+  res = connect(server.fd, (struct sockaddr *)&addr, sizeof(addr));
+  if (res == -1 && errno != EINPROGRESS) {
+    perror("connect failed");
+    finish(EXIT_FAILURE);
+  }
+
+#if EMSCRIPTEN
+  emscripten_set_main_loop(main_loop, 0, 0);
+#else
+  while (1) main_loop(NULL);
+#endif
+
+  return EXIT_SUCCESS;
+}
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