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+/****************************************************************************
+ * examples/udp/udp-client.c
+ *
+ * Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name Gregory Nutt nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include "udp-internal.h"
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static inline void fill_buffer(unsigned char *buf, int offset)
+{
+ int ch;
+ int j;
+
+ buf[0] = offset;
+ for (ch = 0x20, j = offset + 1; ch < 0x7f; ch++, j++)
+ {
+ if (j >= SENDSIZE)
+ {
+ j = 1;
+ }
+ buf[j] = ch;
+ }
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+void send_client(void)
+{
+ struct sockaddr_in server;
+ unsigned char outbuf[SENDSIZE];
+ int sockfd;
+ int nbytes;
+ int offset;
+
+ /* Create a new TCP socket */
+
+ sockfd = socket(PF_INET, SOCK_DGRAM, 0);
+ if (sockfd < 0)
+ {
+ message("client socket failure %d\n", errno);
+ exit(1);
+ }
+
+ /* Then send and receive 256 messages */
+
+ for (offset = 0; offset < 256; offset++)
+ {
+ /* Set up the output buffer */
+
+ fill_buffer(outbuf, offset);
+
+ /* Send the message */
+
+ server.sin_family = AF_INET;
+ server.sin_port = HTONS(PORTNO);
+ server.sin_addr.s_addr = HTONL(CONFIG_EXAMPLE_UDP_SERVERIP);
+
+ message("client: %d. Sending %d bytes\n", offset, SENDSIZE);
+ nbytes = sendto(sockfd, outbuf, SENDSIZE, 0,
+ (struct sockaddr*)&server, sizeof(struct sockaddr_in));
+ message("client: %d. Sent %d bytes\n", offset, nbytes);
+
+ if (nbytes < 0)
+ {
+ message("client: %d. sendto failed: %d\n", offset, errno);
+ close(sockfd);
+ exit(-1);
+ }
+ else if (nbytes != SENDSIZE)
+ {
+ message("client: %d. Bad send length: %d Expected: %d\n",
+ offset, nbytes, SENDSIZE);
+ close(sockfd);
+ exit(-1);
+ }
+
+ /* Now, sleep a bit. No packets should be dropped due to overrunning
+ * the server.
+ */
+
+ sleep(2);
+ }
+ close(sockfd);
+}