Add TCP and UDP socket server sample code in 4.Socket_Server
New file |
| | |
| | | BIN_FILES=tcp_server udp_server |
| | | |
| | | all: clean ${BIN_FILES} |
| | | |
| | | tcp_server: |
| | | gcc $@.c -o $@ |
| | | |
| | | udp_server: |
| | | gcc $@.c -o $@ |
| | | |
| | | clean: |
| | | @rm -f ${BIN_FILES} |
| | | |
New file |
| | |
| | | /********************************************************************************* |
| | | * Copyright: (C) 2018 LingYun IoT Studio |
| | | * All rights reserved. |
| | | * |
| | | * Filename: socket_server.c |
| | | * Description: This file is socket server sample source code, it will echo back |
| | | * the receive data from client. |
| | | * |
| | | * Version: 1.0.0(10/23/2018) |
| | | * Author: Guo Wenxue <guowenxue@gmail.com> |
| | | * ChangeLog: 1, Release initial version on "2017-10-23 01:41:05 PM" |
| | | * |
| | | ********************************************************************************/ |
| | | |
| | | #include <stdio.h> |
| | | #include <string.h> |
| | | #include <errno.h> |
| | | #include <unistd.h> |
| | | #include <sys/types.h> |
| | | #include <sys/socket.h> |
| | | #include <netinet/in.h> |
| | | #include <arpa/inet.h> |
| | | |
| | | #define DEF_LISTEN_PORT 8060 |
| | | #define BACKLOG 13 |
| | | |
| | | int main(int argc, char **argv) |
| | | { |
| | | int rv = -1; |
| | | int listen_fd, client_fd = -1; |
| | | struct sockaddr_in serv_addr; |
| | | struct sockaddr_in cli_addr; |
| | | socklen_t cliaddr_len; |
| | | char buf[1024]; |
| | | int port = DEF_LISTEN_PORT; |
| | | int reuse = 1; |
| | | |
| | | printf("You can use '%s [port]' to change default port[%d].\n", argv[0], DEF_LISTEN_PORT); |
| | | |
| | | if( 2== argc ) |
| | | { |
| | | port = atoi(argv[1]); |
| | | } |
| | | |
| | | listen_fd = socket(AF_INET, SOCK_STREAM, 0); |
| | | if(listen_fd < 0 ) |
| | | { |
| | | printf("create socket failure: %s\n", strerror(errno)); |
| | | return -1; |
| | | } |
| | | printf("socket create fd[%d]\n", listen_fd); |
| | | |
| | | setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)); |
| | | |
| | | memset(&serv_addr, 0, sizeof(serv_addr)); |
| | | serv_addr.sin_family = AF_INET; |
| | | serv_addr.sin_port = htons(port); |
| | | serv_addr.sin_addr.s_addr = htonl(INADDR_ANY); |
| | | if( bind(listen_fd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0 ) |
| | | { |
| | | printf("create socket failure: %s\n", strerror(errno)); |
| | | return -2; |
| | | } |
| | | printf("socket[%d] bind on port[%d] for all IP address ok\n", listen_fd, port); |
| | | |
| | | listen(listen_fd, BACKLOG); |
| | | |
| | | while(1) |
| | | { |
| | | printf("\nStart waiting and accept new client connect...\n", listen_fd); |
| | | client_fd = accept(listen_fd, (struct sockaddr*)&cli_addr, &cliaddr_len); |
| | | if(client_fd < 0) |
| | | { |
| | | printf("accept new socket failure: %s\n", strerror(errno)); |
| | | return -2; |
| | | } |
| | | printf("Accept new client[%s:%d] with fd [%d]\n", inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port), client_fd); |
| | | |
| | | |
| | | memset(buf, 0, sizeof(buf)); |
| | | if( (rv=read(client_fd, buf, sizeof(buf))) < 0) |
| | | { |
| | | printf("Read data from client socket[%d] failure: %s\n", client_fd, strerror(errno)); |
| | | close(client_fd); |
| | | continue; |
| | | } |
| | | else if( rv == 0 ) |
| | | { |
| | | printf("client socket[%d] disconnected\n", client_fd); |
| | | close(client_fd); |
| | | continue; |
| | | } |
| | | printf("read %d bytes data from client[%d] and echo it back: '%s'\n", rv, client_fd, buf); |
| | | |
| | | |
| | | if( write(client_fd, buf, rv) < 0 ) |
| | | { |
| | | printf("Write %d bytes data back to client[%d] failure: %s\n", rv, client_fd, strerror(errno)); |
| | | close(client_fd); |
| | | } |
| | | |
| | | nanosleep(1000); |
| | | close(client_fd); |
| | | } |
| | | |
| | | close(listen_fd); |
| | | } |
| | | |
New file |
| | |
| | | /*********************************************************************************
|
| | | * Copyright: (C) 2018 LingYun IoT Studio
|
| | | * All rights reserved.
|
| | | *
|
| | | * Filename: udp_server.c
|
| | | * Description: This file is UDP socket server sample source code, it will |
| | | * echo back the receive data from client.
|
| | | * |
| | | * Version: 1.0.0(10/23/2018)
|
| | | * Author: Guo Wenxue <guowenxue@gmail.com>
|
| | | * ChangeLog: 1, Release initial version on "2017-10-23 01:41:05 PM"
|
| | | * |
| | | ********************************************************************************/
|
| | |
|
| | | #include <stdio.h>
|
| | | #include <stdlib.h>
|
| | | #include <string.h>
|
| | | #include <unistd.h>
|
| | | #include <ctype.h>
|
| | | #include <errno.h>
|
| | | #include <sys/types.h>
|
| | | #include <sys/socket.h>
|
| | | #include <netinet/in.h>
|
| | | #include <arpa/inet.h>
|
| | |
|
| | | #define DEF_SERV_PORT 8059
|
| | |
|
| | | void dump_buf(char *buf, int size)
|
| | | {
|
| | | int i;
|
| | |
|
| | | for(i=0; i<size; i++)
|
| | | {
|
| | | printf("0x%02x ", buf[i]);
|
| | | }
|
| | |
|
| | | printf("\n");
|
| | | }
|
| | |
|
| | | int main(int argc, char **argv)
|
| | | {
|
| | | struct sockaddr_in servaddr, cliaddr;
|
| | | socklen_t cliaddr_len;
|
| | | int sockfd;
|
| | | char buf[1024];
|
| | | char ip[INET_ADDRSTRLEN];
|
| | | int i, len;
|
| | | int port = DEF_SERV_PORT;
|
| | |
|
| | | printf("You can use '%s [port]' to change default port[%d].\n", argv[0], DEF_SERV_PORT);
|
| | |
|
| | | if( argc == 2 )
|
| | | {
|
| | | port = atoi(argv[1]);
|
| | | }
|
| | |
|
| | | sockfd = socket(AF_INET, SOCK_DGRAM, 0);
|
| | |
|
| | | bzero(&servaddr, sizeof(servaddr));
|
| | | servaddr.sin_family = AF_INET;
|
| | | servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
|
| | | servaddr.sin_port = htons(port);
|
| | |
|
| | | printf("Start listen on port[%d]\n", port);
|
| | |
|
| | | bind(sockfd, (struct sockaddr*)&servaddr, sizeof(servaddr));
|
| | | printf("Start Accepting connections ...\n");
|
| | |
|
| | | while(1)
|
| | | {
|
| | | cliaddr_len = sizeof(cliaddr);
|
| | |
|
| | | memset(buf, 0, sizeof(buf));
|
| | | len = recvfrom(sockfd, buf, sizeof(buf), 0, (struct sockaddr*)&cliaddr, &cliaddr_len);
|
| | | if(len == -1)
|
| | | {
|
| | | printf("recvfrom error: %s\n", strerror(errno));
|
| | | }
|
| | | printf("Received %d bytes datas from %s at PORT %d\n", len, inet_ntop(AF_INET, &cliaddr.sin_addr, ip, sizeof(ip)), |
| | | ntohs(cliaddr.sin_port));
|
| | |
|
| | | printf("%s\n", buf);
|
| | | dump_buf(buf, len);
|
| | |
|
| | | #if 0
|
| | | for(i = 0; i < len; i++)
|
| | | {
|
| | | buf[i] = toupper(buf[i]);
|
| | | }
|
| | | dump_buf(buf, len);
|
| | | #endif
|
| | |
|
| | | len = sendto(sockfd, buf, len, 0, (struct sockaddr*)&cliaddr, sizeof(cliaddr));
|
| | | if(len == -1)
|
| | | {
|
| | | printf("sendto error: %s\n", strerror(errno));
|
| | | }
|
| | | }
|
| | |
|
| | | close(sockfd);
|
| | | return 0;
|
| | | }
|