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telnetd: move generic stuff into libbb. It will make it easy

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to make other server applets IPv6-aware too.
This commit is contained in:
Denis Vlasenko
2006-11-22 16:10:39 +00:00
parent 0801ef28ca
commit c8717cd857
4 changed files with 168 additions and 80 deletions
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80
networking/telnetd.c
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@ -354,87 +354,10 @@ free_session(struct tsession *ts)
}
}
static int
dotted2sockaddr(const char *dotted, struct sockaddr* sp, int socklen)
{
union {
struct in_addr a4;
#if ENABLE_FEATURE_IPV6
struct in6_addr a6;
#endif
} a;
#if ENABLE_FEATURE_IPV6
if (socklen >= sizeof(struct sockaddr_in6)
&& inet_pton(AF_INET6, dotted, &a) > 0
) {
((struct sockaddr_in6*)sp)->sin6_family = AF_INET6;
((struct sockaddr_in6*)sp)->sin6_addr = a.a6;
} else
#endif
if (socklen >= sizeof(struct sockaddr_in)
&& inet_pton(AF_INET, dotted, &a) > 0
) {
((struct sockaddr_in*)sp)->sin_family = AF_INET;
((struct sockaddr_in*)sp)->sin_addr = a.a4;
} else
return 1;
return 0; /* success */
}
static int
xsocket_stream_ip4or6(sa_family_t *fp)
{
int fd = socket(AF_INET6, SOCK_STREAM, 0);
if (fp) *fp = AF_INET6;
if (fd < 0) {
fd = xsocket(AF_INET, SOCK_STREAM, 0);
if (fp) *fp = AF_INET;
}
return fd;
}
static int
create_socket(const char *hostaddr, int port)
{
static const int on = 1;
int fd;
union {
struct sockaddr sa;
struct sockaddr_in sin;
#if ENABLE_FEATURE_IPV6
struct sockaddr_in6 sin6;
#endif
} sa;
memset(&sa, 0, sizeof(sa));
if (hostaddr && dotted2sockaddr(hostaddr, &sa.sa, sizeof(sa)))
bb_show_usage();
if (!sa.sa.sa_family)
fd = xsocket_stream_ip4or6(&sa.sa.sa_family);
else /* user specified -b ADDR dictates family */
fd = xsocket(sa.sa.sa_family, SOCK_STREAM, 0);
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
#if ENABLE_FEATURE_IPV6
if (sa.sa.sa_family == AF_INET6)
sa.sin6.sin6_port = htons(port);
#endif
if (sa.sa.sa_family == AF_INET)
sa.sin.sin_port = htons(port);
xbind(fd, &sa.sa, sizeof(sa));
xlisten(fd, 1);
return fd;
}
#else /* !FEATURE_TELNETD_STANDALONE */
/* Never actually called */
void free_session(struct tsession *ts);
int create_socket(const char *hostaddr, int port);
#endif
@ -491,7 +414,8 @@ telnetd_main(int argc, char **argv)
if (IS_INETD) {
sessions = make_new_session(0, 1);
} else {
master_fd = create_socket(opt_bindaddr, portnbr);
master_fd = create_and_bind_socket_ip4or6(opt_bindaddr, portnbr);
xlisten(master_fd, 1);
if (!(opt & OPT_FOREGROUND))
xdaemon(0, 0);
}