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Diffstat (limited to 'apps/examples/udp/udp-client.c')
-rw-r--r-- | apps/examples/udp/udp-client.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/apps/examples/udp/udp-client.c b/apps/examples/udp/udp-client.c new file mode 100644 index 000000000..545a3a6c3 --- /dev/null +++ b/apps/examples/udp/udp-client.c @@ -0,0 +1,133 @@ +/**************************************************************************** + * 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); +} |