| | |
| | | /********************************************************************************* |
| | | * Copyright: (C) 2018 LingYun IoT Studio |
| | | * All rights reserved. |
| | | * Copyright: (C) 2018 LingYun IoT Studio |
| | | * All rights reserved. |
| | | * |
| | | * Filename: socket_server.c |
| | | * Description: This file is TCP socket server example source code. |
| | | * |
| | | * 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" |
| | | * |
| | | * Filename: socket_server.c |
| | | * Description: This file is TCP socket server example source code. |
| | | * |
| | | * 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 <netinet/in.h> |
| | | #include <arpa/inet.h> |
| | | |
| | | #define LISTEN_PORT 8889 |
| | | #define BACKLOG 13 |
| | | #define LISTEN_PORT 8889 |
| | | #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 addr_len = sizeof(cli_addr); |
| | | char buf[1024]; |
| | | int reuse = 1; |
| | | int rv = -1; |
| | | int listen_fd, client_fd = -1; |
| | | struct sockaddr_in serv_addr; |
| | | struct sockaddr_in cli_addr; |
| | | socklen_t addr_len = sizeof(cli_addr); |
| | | char buf[1024]; |
| | | int reuse = 1; |
| | | |
| | | /* create TCP socket */ |
| | | 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); |
| | | /* create TCP socket */ |
| | | 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); |
| | | |
| | | /* Fix port can not be used when stop server program and run it again immediately. */ |
| | | setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)); |
| | | /* Fix port can not be used when stop server program and run it again immediately. */ |
| | | setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)); |
| | | |
| | | /* bind socket server information */ |
| | | memset(&serv_addr, 0, sizeof(serv_addr)); |
| | | serv_addr.sin_family = AF_INET; |
| | | serv_addr.sin_port = htons(LISTEN_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, LISTEN_PORT); |
| | | /* bind socket server information */ |
| | | memset(&serv_addr, 0, sizeof(serv_addr)); |
| | | serv_addr.sin_family = AF_INET; |
| | | serv_addr.sin_port = htons(LISTEN_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, LISTEN_PORT); |
| | | |
| | | /* start listen socket */ |
| | | listen(listen_fd, BACKLOG); |
| | | /* start listen socket */ |
| | | listen(listen_fd, BACKLOG); |
| | | |
| | | while(1) |
| | | { |
| | | /* accept new incoming socket client */ |
| | | printf("\nStart waiting and accept new client connect...\n"); |
| | | client_fd = accept(listen_fd, (struct sockaddr*)&cli_addr, &addr_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); |
| | | while(1) |
| | | { |
| | | /* accept new incoming socket client */ |
| | | printf("\nStart waiting and accept new client connect...\n"); |
| | | client_fd = accept(listen_fd, (struct sockaddr*)&cli_addr, &addr_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); |
| | | |
| | | while(1) |
| | | { |
| | | /* receive message from socket client */ |
| | | 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); |
| | | break; |
| | | } |
| | | else if( rv == 0 ) |
| | | { |
| | | printf("client socket[%d] disconnected\n", client_fd); |
| | | close(client_fd); |
| | | break; |
| | | } |
| | | while(1) |
| | | { |
| | | /* receive message from socket client */ |
| | | 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); |
| | | break; |
| | | } |
| | | else if( rv == 0 ) |
| | | { |
| | | printf("client socket[%d] disconnected\n", client_fd); |
| | | close(client_fd); |
| | | break; |
| | | } |
| | | |
| | | printf("Read [%d] bytes data from socket client[%d]: %s\n", rv, client_fd, buf); |
| | | printf("Read [%d] bytes data from socket client[%d]: %s\n", rv, client_fd, buf); |
| | | |
| | | /* send message to socket client */ |
| | | printf("Reply back to socket client...\n"); |
| | | snprintf(buf, sizeof(buf), "Hello, socket client [%s:%d]\n", inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port)); |
| | | if( write(client_fd, buf, strlen(buf)) < 0 ) |
| | | { |
| | | printf("Reply back to socket client[%d] failure: %s\n", client_fd, strerror(errno)); |
| | | close(client_fd); |
| | | } |
| | | printf("\n"); |
| | | } |
| | | /* send message to socket client */ |
| | | printf("Reply back to socket client...\n"); |
| | | snprintf(buf, sizeof(buf), "Hello, socket client [%s:%d]\n", inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port)); |
| | | if( write(client_fd, buf, strlen(buf)) < 0 ) |
| | | { |
| | | printf("Reply back to socket client[%d] failure: %s\n", client_fd, strerror(errno)); |
| | | close(client_fd); |
| | | } |
| | | printf("\n"); |
| | | } |
| | | |
| | | close(client_fd); |
| | | } |
| | | close(client_fd); |
| | | } |
| | | |
| | | close(listen_fd); |
| | | return 0; |
| | | close(listen_fd); |
| | | return 0; |
| | | } |
| | | |