简单的IPv6 UDP/TCP socket编程 -- 两台Linux实现简单的ipv6通信
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配置:
1.两台linux用网线直接相连
2.手动配置两台linux的ipv6地址为:
ifconfig eth0 add 2001:da8:e000::1:1:1
ifconfig eth0 add 2001:da8:e000::1:1:2
如下所示:
[root@EmbedSky /]# ifconfig
eth0 Link encap:Ethernet HWaddr 10:23:45:67:89:AB
inet addr:192.168.142.21 Bcast:192.168.142.255 Mask:255.255.255.0
inet6 addr: 2001:da8:e000::1:1:1/0 Scope:Global //手动添加的地址
inet6 addr: fe80::1223:45ff:fe67:89ab/64 Scope:Link //ipv6中的Link地址相当于ipv中169...私有地址
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:339 errors:0 dropped:0 overruns:0 frame:0
TX packets:141 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:39003 (38.0 KiB) TX bytes:9530 (9.3 KiB)
Interrupt:51 Base address:0x4000
3.接下来用ping6地址来测试:
[root@EmbedSky /]# ping6 2001:da8:e000::1:1:2
PING 2001:da8:e000::1:1:2 (2001:da8:e000::1:1:2): 56 data bytes
64 bytes from 2001:da8:e000::1:1:2: seq=0 ttl=64 time=4.788 ms
64 bytes from 2001:da8:e000::1:1:2: seq=1 ttl=64 time=1.268 ms
4.wireshark工具抓包可得:
网络编程
UDP通信
#include <stdio.h>#include <stdlib.h>#include <errno.h>#include <string.h>#include <sys/types.h>#include <netinet/in.h>#include <sys/socket.h>#include <sys/wait.h>#include <unistd.h>#include <arpa/inet.h>int main(int argc, char **argv){struct sockaddr_in6 s_addr;struct sockaddr_in6 c_addr;int sock;socklen_t addr_len;int len;char buff[128];char buf_ip[128];if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) == -1) {perror("socket");exit(errno);} elseprintf("create socket.\n\r");memset(&s_addr, 0, sizeof(struct sockaddr_in6));s_addr.sin6_family = AF_INET6;if (argv[2])s_addr.sin6_port = htons(atoi(argv[2]));elses_addr.sin6_port = htons(4444);if (argv[1])inet_pton(AF_INET6, argv[1], &s_addr.sin6_addr);elses_addr.sin6_addr = in6addr_any;if ((bind(sock, (struct sockaddr *) &s_addr, sizeof(s_addr))) == -1) {perror("bind");exit(errno);} elseprintf("bind address to socket.\n\r");addr_len = sizeof(c_addr);while (1) {len = recvfrom(sock, buff, sizeof(buff) - 1, 0, (struct sockaddr *) &c_addr, &addr_len);if (len < 0) {perror("recvfrom");exit(errno);}buff[len] = '\0';printf("receive from %s: buffer:%s\n\r",inet_ntop(AF_INET6, &c_addr.sin6_addr, buf_ip, sizeof(buf_ip)), buff);}return 0;}
client端:
#include <stdio.h>#include <stdlib.h>#include <errno.h>#include <string.h>#include <sys/types.h>#include <netinet/in.h>#include <sys/socket.h>#include <sys/wait.h>#include <unistd.h>#include <arpa/inet.h>int main(int argc, char **argv){struct sockaddr_in6 s_addr;int sock;int addr_len;int len;char buff[128];if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) == -1) {perror("socket");exit(errno);} elseprintf("create socket.\n\r");s_addr.sin6_family = AF_INET6;if (argv[2])s_addr.sin6_port = htons(atoi(argv[2]));elses_addr.sin6_port = htons(4444);if (argv[1])inet_pton(AF_INET6, argv[1], &s_addr.sin6_addr);else {printf("usage:./command ip port\n");exit(0);}addr_len = sizeof(s_addr);strcpy(buff, "hello i'm here");len = sendto(sock, buff, strlen(buff), 0, (struct sockaddr *) &s_addr, addr_len);if (len < 0) {printf("\n\rsend error.\n\r");return 3;}printf("send success.\n\r");return 0;}
测试如下:
server端:
[root@zx bacnet-router]# ./server 2001:da8:e000::1:1:2 4444create socket.bind address to socket.receive from 2001:da8:e000::1:1:1: buffer:hello i'm herereceive from 2001:da8:e000::1:1:1: buffer:hello i'm herereceive from 2001:da8:e000::1:1:2: buffer:hello i'm herereceive from 2001:da8:e000::1:1:2: buffer:hello i'm here
client端:
[root@zx bacnet-router]# ./client 2001:da8:e000::1:1:2 4444create socket.send success.[root@zx bacnet-router]# ./client 2001:da8:e000::1:1:2 4444create socket.send success.[root@zx bacnet-router]# [root@EmbedSky /bacnet-router]# ./arm-client 2001:da8:e000::1:1:2 4444create socket.send success.[root@EmbedSky /bacnet-router]# ./arm-client 2001:da8:e000::1:1:2 4444create socket.send success.[root@EmbedSky /bacnet-router]#
TCP通信:
server端:
#include <stdio.h>#include <stdlib.h>#include <errno.h>#include <string.h>#include <sys/types.h>#include <netinet/in.h>#include <sys/socket.h>#include <sys/wait.h>#include <unistd.h>#include <arpa/inet.h>#define MAXBUF 1024int main(int argc, char **argv){ int sockfd, new_fd; socklen_t len; /* struct sockaddr_in my_addr, their_addr; */ // IPv4 struct sockaddr_in6 my_addr, their_addr; // IPv6 unsigned int myport, lisnum; char buf[MAXBUF + 1]; if (argv[1]) myport = atoi(argv[1]); else myport = 7838; if (argv[2]) lisnum = atoi(argv[2]); else lisnum = 2; /* if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) { */ // IPv4 if ((sockfd = socket(PF_INET6, SOCK_STREAM, 0)) == -1) { // IPv6 perror("socket"); exit(1); } else printf("socket created\n"); bzero(&my_addr, sizeof(my_addr)); /* my_addr.sin_family = PF_INET; */ // IPv4 my_addr.sin6_family = PF_INET6; // IPv6 /* my_addr.sin_port = htons(myport); */ // IPv4 my_addr.sin6_port = htons(myport); // IPv6 if (argv[3]) /* my_addr.sin_addr.s_addr = inet_addr(argv[3]); */ // IPv4 inet_pton(AF_INET6, argv[3], &my_addr.sin6_addr); // IPv6 else /* my_addr.sin_addr.s_addr = INADDR_ANY; */ // IPv4 my_addr.sin6_addr = in6addr_any; // IPv6 /* if (bind(sockfd, (struct sockaddr *) &my_addr, sizeof(struct sockaddr)) */ // IPv4 if (bind(sockfd, (struct sockaddr *) &my_addr, sizeof(struct sockaddr_in6)) // IPv6 == -1) { perror("bind"); exit(1); } else printf("binded\n"); if (listen(sockfd, lisnum) == -1) { perror("listen"); exit(1); } else printf("begin listen\n"); while (1) { len = sizeof(struct sockaddr); if ((new_fd = accept(sockfd, (struct sockaddr *) &their_addr, &len)) == -1) { perror("accept"); exit(errno); } else printf("server: got connection from %s, port %d, socket %d\n", /* inet_ntoa(their_addr.sin_addr), */ // IPv4 inet_ntop(AF_INET6, &their_addr.sin6_addr, buf, sizeof(buf)), // IPv6 /* ntohs(their_addr.sin_port), new_fd); */ // IPv4 their_addr.sin6_port, new_fd); // IPv6 bzero(buf, MAXBUF + 1); strcpy(buf, "This is sever to client!\n"); len = send(new_fd, buf, strlen(buf), 0); if (len < 0) { printf ("message '%s' error number:%d,error mes:'%s'\n", buf, errno, strerror(errno)); } else printf("message'%s'success length: %d\n", buf, len); bzero(buf, MAXBUF + 1); len = recv(new_fd, buf, MAXBUF, 0); if (len > 0) printf("receive message:'%s',length:%d\n", buf, len); else printf ("message error number:%d,error mes:'%s'\n", errno, strerror(errno)); } close(sockfd); return 0;}
client端:
#include <stdio.h>#include <string.h>#include <errno.h>#include <sys/socket.h>#include <resolv.h>#include <stdlib.h>#include <netinet/in.h>#include <arpa/inet.h>#include <unistd.h>#define MAXBUF 1024int main(int argc, char **argv){ int sockfd, len; /* struct sockaddr_in dest; */ // IPv4 struct sockaddr_in6 dest; // IPv6 char buffer[MAXBUF + 1]; if (argc != 3) { printf ("参数格式错误!正确用法如下:\n\t\t%s IP地址 端口\n\t比如:\t%s 127.0.0.1 80\n此程序用来从某个 IP 地址的服务器某个端口接收最多 MAXBUF 个字节的消息", argv[0], argv[0]); exit(0); } /* socket for tcp */ /* if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { */ // IPv4 if ((sockfd = socket(AF_INET6, SOCK_STREAM, 0)) < 0) { // IPv6 perror("Socket"); exit(errno); } printf("socket created\n"); /* 初始化服务器端(对方)的地址和端口信息 */ bzero(&dest, sizeof(dest)); /* dest.sin_family = AF_INET; */ // IPv4 dest.sin6_family = AF_INET6; // IPv6 /* dest.sin_port = htons(atoi(argv[2])); */ // IPv4 dest.sin6_port = htons(atoi(argv[2])); // IPv6 /* if (inet_aton(argv[1], (struct in_addr *) &dest.sin_addr.s_addr) == 0) { */ // IPv4 if ( inet_pton(AF_INET6, argv[1], &dest.sin6_addr) < 0 ) { // IPv6 perror(argv[1]); exit(errno); } printf("address created\n"); /* 连接服务器 */ if (connect(sockfd, (struct sockaddr *) &dest, sizeof(dest)) != 0) { perror("Connect "); exit(errno); } printf("server connected\n"); /* 接收对方发过来的消息,最多接收 MAXBUF 个字节 */ bzero(buffer, MAXBUF + 1); /* 接收服务器来的消息 */ len = recv(sockfd, buffer, MAXBUF, 0); if (len > 0) printf("接收消息成功:'%s',共%d个字节的数据\n", buffer, len); else printf ("消息接收失败!错误代码是%d,错误信息是'%s'\n", errno, strerror(errno)); bzero(buffer, MAXBUF + 1); strcpy(buffer, "这是客户端发给服务器端的消息\n"); /* 发消息给服务器 */ len = send(sockfd, buffer, strlen(buffer), 0); if (len < 0) printf ("消息'%s'发送失败!错误代码是%d,错误信息是'%s'\n", buffer, errno, strerror(errno)); else printf("消息'%s'发送成功,共发送了%d个字节!\n", buffer, len); /* 关闭连接 */ close(sockfd); return 0;}
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