ipv 6 socketプログラミング実践
Table of Contents 1. ipv 6 socketプログラミング実践 2. サンプルプログラム ipv 6 socketプログラミング実践 ipアドレス長が変化し、ipv 4 255.255.255.255.255.255のアドレスフォーマットに従って、最長15で、終端16バイトの長さを加えた.ipv 6のアドレスフォーマットは、XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXXX:XXXXX:XXXXXで、最長39で、終了符を加えると40バイト長になります. struct sockaddr変化struct sockaddr_storageという構造体の変化はgetpeernameとgetsocknameの2つの関数で使用されます.manualで与えられたパラメータタイプはstruct sockaddrですが、ipv 6ではstruct sockaddr_を使用する必要があります.storage struct sockaddr_In struct sockaddrに変化in 6はinet_*次のように機能します. sin_addr –> sin6_addr inet_ntop(AF_INET6, &sock_addr_in6.sin6_addr, peerAddrV6, sizeof(peerAddrV6)); */ipv6 peerAddr = (UINT8 *)inet_ntoa(sock_addr_in.sin_addr);/* ipv4 sin_port –> sin6_port fromV6.sin6_port = htons(TcpLinkCB[dwIndex].lPort); */ipv6 from.sin_port = htons(TcpLinkCB[dwIndex].lPort);/* ipv4
inet_addr –> inet_pton TcpLinkCB[dwIndex].dwIPAddr = inet_addr(tmp); */ipv4 inet_pton(AF_INET6, tmp, &TcpLinkCB[dwIndex].in6peerIPAddr);/* ipv6 socketインパラメータ変化AF_INET –> AF_INET6 skt = socket(AF_INET6, SOCK_STREAM, 0); */ipv6 skt = socket(AF_INET, SOCK_STREAM, 0);/* ipv4 also: PF_INET –> PF_INET6 bind関数パラメータ変化bind(sockfd,(struct sockaddr*)&my_addr, sizeof(struct sockaddr)) –> bind(sockfd, (struct sockaddr *) &my_addr, sizeof(struct sockaddr_in6) INADDR_ANY –> in6addr_any struct sockaddr_in sa; struct sockaddr_in6 sa6; sa.sin_addr.s_addr = INADDR_ANY; */use my IPv4 address sa6.sin6_addr = in6addr_any;/* use my IPv6 address fromV6.sin6_family = AF_INET6; */ipv6 from.sin_family = AF_INET;/* ipv4 struct in6_addrはIN 6 ADDR_を使用できますANY_INIT初期化struct in 6_addr ia6 = IN6ADDR_ANY_INIT;
サンプルプログラム ipv6 ipv6 tcp server ipv 6 tcp client ipv6 udp server ipv6 udp client
ref:サンプルプログラムソース
サンプルプログラム
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define MAXBUF 1024
int 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,
" /n new_fd accept socket , sockfd socket , socket /n");
/* */
len = send(new_fd, buf, strlen(buf), 0);
if (len < 0) {
printf
(" '%s' ! %d, '%s'/n",
buf, errno, strerror(errno));
} else
printf(" '%s' , %d !/n",
buf, len);
bzero(buf, MAXBUF + 1);
/* */
len = recv(new_fd, buf, MAXBUF, 0);
if (len > 0)
printf(" :'%s', %d /n",
buf, len);
else
printf
(" ! %d, '%s'/n",
errno, strerror(errno));
/* */
}
close(sockfd);
return 0;
}
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define MAXBUF 1024
int 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
(" ! :/n/t/t%s IP /n/t :/t%s 127.0.0.1 80/n IP MAXBUF ",
argv[0], argv[0]);
exit(0);
}
/* socket 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");
/* ( ) */
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");
/* */
if (connect(sockfd, (struct sockaddr *) &dest, sizeof(dest)) != 0) {
perror("Connect ");
exit(errno);
}
printf("server connected/n");
/* , MAXBUF */
bzero(buffer, MAXBUF + 1);
/* */
len = recv(sockfd, buffer, MAXBUF, 0);
if (len > 0)
printf(" :'%s', %d /n",
buffer, len);
else
printf
(" ! %d, '%s'/n",
errno, strerror(errno));
bzero(buffer, MAXBUF + 1);
strcpy(buffer, " /n");
/* */
len = send(sockfd, buffer, strlen(buffer), 0);
if (len < 0)
printf
(" '%s' ! %d, '%s'/n",
buffer, errno, strerror(errno));
else
printf(" '%s' , %d !/n",
buffer, len);
/* */
close(sockfd);
return 0;
}
コンパイルコマンド:gcc-o server./server.c gcc -o client ./client.c起動コマンド:./server port backlog ip_addr ./client ip_addr port #include
#include
#include
#include
#include
#define LOCALPORT 8888
int main(int argc,char *argv[])
{
int mysocket,len;
int i=0;
struct sockaddr_in6 addr;
int addr_len;
char msg[200];
char buf[300];
if((mysocket=socket(AF_INET6,SOCK_DGRAM,0))<0)
{
perror("error:");
return(1);
}
else
{
printf("socket created ...
");
printf("socket id :%d
",mysocket);
}
addr_len=sizeof(struct sockaddr_in6);
bzero(&addr,sizeof(addr));
addr.sin6_family=AF_INET6;
addr.sin6_port=htons(LOCALPORT);
addr.sin6_addr=in6addr_any;
if(bind(mysocket,(struct sockaddr *)&addr,sizeof(addr))<0)
{
perror("connect");
return(1);
}
else
{
printf("bink ok .
");
printf("local port : %d
",LOCALPORT);
}
while(1)
{
bzero(msg,sizeof(msg));
len = recvfrom(mysocket,msg,sizeof(msg),0,(struct sockaddr *)&addr,(socklen_t*)&addr_len);
printf("%d:",i);
i++;
inet_ntop(AF_INET6,&addr.sin6_addr,buf,sizeof(buf));
printf("message from ip %s",buf);
printf("Received message : %s
",msg);
if(sendto(mysocket,msg,len,0,(struct sockaddr *)&addr,addr_len)<0)
{
printf("error");
return(1);
}
}
}
#include
#include
#include
#include
#include
#define REMOTEPORT 8888
#define REMOTEIP "::1"
int main(int argc,char *argv[])
{
int mysocket,len;
int i=0;
struct sockaddr_in6 addr;
int addr_len;
char msg[200];
if((mysocket=socket(AF_INET6,SOCK_DGRAM,0))< 0)
{
perror("error:");
return(1);
}
else
{
printf("socket created ...
");
printf("socket id :%d
",mysocket);
printf("rmote ip : %s
",REMOTEIP);
printf("remote port :%d
",REMOTEPORT);
}
addr_len=sizeof(struct sockaddr_in6);
bzero(&addr,sizeof(addr));
addr.sin6_family=AF_INET6;
addr.sin6_port=htons(REMOTEPORT);
inet_pton(AF_INET6,REMOTEIP,&addr.sin6_addr);
while(1)
{
bzero(msg,sizeof(msg));
len=read(STDIN_FILENO,msg,sizeof(msg));
if(sendto(mysocket,msg,sizeof(msg),0,(struct sockaddr *)&addr,addr_len)<0)
{
printf("error");
return(1);
}
len=recvfrom(mysocket,msg,sizeof(msg),0,(struct sockaddr *)&addr,(socklen_t*)&addr_len);
printf("%d:",i);
i++;
printf("Received message : %s
",msg);
}
}