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<![CDATA[
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <arpa/inet.h>
#define DEFAULT_PORT 5555
int main __P((int, char **));
int
main(argc, argv)
int argc;
char **argv;
{
struct servent *sp;
unsigned long lport;
u_int16_t port;
char *ep;
struct sockaddr_in6 serv;
int servlen;
struct sockaddr_in6 from;
socklen_t fromlen;
int s;
int ls;
char hbuf[INET6_ADDRSTRLEN];
if (argc != 2) {
fprintf(stderr, "usage: tcps2 port\n");
exit(1);
/*NOTREACHED*/
}
sp = getservbyname(argv[1], "tcp");
if (sp)
port = sp->s_port & 0xffff;
else {
ep =NULL;
errno = 0;
lport =strtoul(argv[1], &ep, 10);
if (!*argv[1] || errno || !ep || *ep) {
fprintf(stderr, "%s: no such service\n", argv[1]);
exit(1);
/*NOTREACHED*/
}
if (lport & ~0xffff) {
fprintf(stderr, "%s: out of range\n", argv[1]);
exit(1);
/*NOTREACHED*/
}
port = htons(lport & 0xffff);
}
endservent();
memset(&serv, 0, sizeof(serv));
serv.sin6_family = AF_INET;
/* linux/Solarisでは以下の行は不要 */
serv.sin6_len = sizeof(struct sockaddr_in6);
serv.sin6_port = port;
servlen = sizeof(struct sockaddr_in6);
s = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
if (s < 0) {
perror("socket");
exit(1);
/*NOTREACHED*/
}
if (bind(s, (struct sockaddr *)&serv, servlen) < 0) {
perror("bind");
exit(1);
/*NOTREACHED*/
}
if (listen(s, 5) < 0) {
perror("listen");
exit(1);
/*NOTREACHED*/
}
while (1) {
fromlen = sizeof(from);
ls = accept(s, (struct sockaddr *)&from, &fromlen);
if (ls < 0)
continue;
if (from.sin6_family != AF_INET6 || fromlen != sizeof(struct sockaddr_in6)) {
exit(1);
/*NOTREACHED*/
}
if (inet_ntop(AF_INET6, &from.sin6_addr, hbuf, sizeof(hbuf)) == NULL) {
exit(1);
/*NOTREACHED*/
}
write(ls, "Hello ",6);
write(ls, hbuf, strlen(hbuf));
write(ls, "\n", 1);
close(ls);
}
/*NOTREACHED*/
}
]]>
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