Linux中使用C语言实现基于UDP协议的Socket通信示例
2019/7/10 23:00:06
本文主要是介绍Linux中使用C语言实现基于UDP协议的Socket通信示例,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
linux下udp服务器端源码示例:
#include <errno.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <stdlib.h> #include <string.h> #include <netinet/in.h> #include <stdio.h> #include <unistd.h> #include <sys/types.h> #include <sys/socket.h> int main(int argc, char **argv) { printf("server ip: %s/n", argv[1]); printf("server port: %s/n", argv[2]); printf("/n service starting.../n/n"); int socketFd; struct sockaddr_in svrAddr; struct sockaddr_in localAddr; socketFd = socket (AF_INET, SOCK_DGRAM, 0); if ( -1 == socketFd ) { perror( "socket:" ); exit(-1); } // 设置地址可复用 int option = 1; setsockopt( socketFd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option) ); // 客户端IP memset(&localAddr, 0, sizeof(localAddr)); localAddr.sin_family = AF_INET; localAddr.sin_addr.s_addr = inet_addr( argv[1]); localAddr.sin_port = htons (atoi(argv[2])); int bindResult = bind(socketFd, (struct sockaddr *) &localAddr, sizeof(localAddr)); if ( -1 == bindResult ) { perror( "bind:" ); close(socketFd); exit(-1); } // 服务器IP memset(&svrAddr, 0, sizeof(svrAddr)); svrAddr.sin_family = AF_INET; svrAddr.sin_addr.s_addr = inet_addr( argv[1]); svrAddr.sin_port = htons (atoi(argv[2])); char tempBuff[2048] = {0}; for ( ; ; ) { // 接收数据 struct sockaddr_in fromAddr; memset((char *)&fromAddr, 0, (int)sizeof(fromAddr)); socklen_t fromLen = sizeof(fromAddr); ssize_t result = recvfrom( socketFd, tempBuff, sizeof(tempBuff), 0, (struct sockaddr *)&fromAddr, &fromLen); if ( -1 == result ) { perror("recvfrom:"); continue; } else { printf( "recv data %s successed. data len: %d/n", inet_ntoa(fromAddr.sin_addr), result ); printf( "data:/n"); for ( int i = 0; i < result; i++ ) { printf( "%02x ", tempBuff[i] ); if ( (i+1)%16 == 0 ) { printf( "/n" ); } } printf( "/n" ); } // 发送数据 result = sendto( socketFd, tempBuff, result, 0, (struct sockaddr*)&fromAddr, sizeof(fromAddr)); if ( -1 == result ) { perror("sendto:"); } else { printf("send data success. data len:%d/n", result ); } sleep( 60 ); } close(socketFd); }
linux下udp客户端源码示例:
#include <errno.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <stdlib.h> #include <string.h> #include <netinet/in.h> #include <stdio.h> #include <unistd.h> #include <sys/types.h> #include <sys/socket.h> typedef struct _NSS_HEADER { unsigned short ProtocolVersion; /* 协议版本信息 */ unsigned short MsgType; /* 消息类型 */ unsigned short TransactionNo; /* 传输编号 */ unsigned short PacketLength; /* 数据包长度,包括Header */ }NSS_HEADER; int main(int argc, char **argv) { printf("client ip: %s/n", argv[1]); printf("client port: %s/n", argv[2]); printf("server ip: %s/n", argv[3]); printf("server port: %s/n", argv[4]); printf("/n service starting.../n/n"); int socketFd; struct sockaddr_in svrAddr; struct sockaddr_in localAddr; socketFd = socket (AF_INET, SOCK_DGRAM, 0); if ( -1 == socketFd ) { perror( "socket:" ); exit(-1); } // 设置地址可复用 int option = 1; setsockopt( socketFd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option) ); // 客户端IP memset(&localAddr, 0, sizeof(localAddr)); localAddr.sin_family = AF_INET; localAddr.sin_addr.s_addr = inet_addr( argv[1]); localAddr.sin_port = htons (atoi(argv[2])); int bindResult = bind(socketFd, (struct sockaddr *) &localAddr, sizeof(localAddr)); if ( -1 == bindResult ) { perror( "bind:" ); sleep(10); close(socketFd); exit(-1); } // 服务器IP memset(&svrAddr, 0, sizeof(svrAddr)); svrAddr.sin_family = AF_INET; svrAddr.sin_addr.s_addr = inet_addr( argv[3]); svrAddr.sin_port = htons (atoi(argv[4])); char tempBuff[2048] = {0}; // 每分钟发送一次数据 NSS_HEADER hdr; memset( &hdr, 0, sizeof(NSS_HEADER)); for ( ; ; ) { // 发送数据 hdr.TransactionNo++; ssize_t result = sendto( socketFd, &hdr, sizeof(NSS_HEADER), 0, (struct sockaddr*)&svrAddr, sizeof(svrAddr)); if ( -1 == result ) { perror("sendto:"); } else { printf("send data success. data len:%d/n", result ); } // 接收数据 struct sockaddr_in fromAddr; memset((char *)&fromAddr, 0, (int)sizeof(fromAddr)); socklen_t fromLen = sizeof(fromAddr); result = recvfrom( socketFd, tempBuff, sizeof(tempBuff), 0, (struct sockaddr *)&fromAddr, &fromLen); if ( -1 == result ) { perror("recvfrom:"); } else { printf( "recv data %s successed. data len: %d/n", inet_ntoa(fromAddr.sin_addr), result ); printf( "data:/n"); for ( int i = 0; i < result; i++ ) { printf( "%02x ", tempBuff[i] ); if ( (i+1)%16 == 0 ) { printf( "/n" ); } } printf("/n"); } sleep( 60 ); } close(socketFd); }
这篇关于Linux中使用C语言实现基于UDP协议的Socket通信示例的文章就介绍到这儿,希望我们推荐的文章对大家有所帮助,也希望大家多多支持为之网!
- 2024-05-15PingCAP 黄东旭参与 CCF 秀湖会议,共探开源教育未来
- 2024-05-13PingCAP 戴涛:构建面向未来的金融核心系统
- 2024-05-09flutter3.x_macos桌面os实战
- 2024-05-09Rust中的并发性:Sync 和 Send Traits
- 2024-05-08使用Ollama和OpenWebUI在CPU上玩转Meta Llama3-8B
- 2024-05-08完工标准(DoD)与验收条件(AC)究竟有什么不同?
- 2024-05-084万 star 的 NocoDB 在 sealos 上一键起,轻松把数据库编程智能表格
- 2024-05-08Mac 版Stable Diffusion WebUI的安装
- 2024-05-08解锁CodeGeeX智能问答中3项独有的隐藏技能
- 2024-05-08RAG算法优化+新增代码仓库支持,CodeGeeX的@repo功能效果提升