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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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152
libbb/xconnect.c
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@ -66,3 +66,155 @@ int xconnect_tcp_v4(struct sockaddr_in *s_addr)
xconnect(s, (struct sockaddr*) s_addr, sizeof(*s_addr));
return s;
}
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;
/* TODO maybe: port spec? like n.n.n.n:nn */
#if ENABLE_FEATURE_IPV6
if (socklen >= sizeof(struct sockaddr_in6)
&& inet_pton(AF_INET6, dotted, &a.a6) > 0
) {
((struct sockaddr_in6*)sp)->sin6_family = AF_INET6;
((struct sockaddr_in6*)sp)->sin6_addr = a.a6;
/* ((struct sockaddr_in6*)sp)->sin6_port = */
return 0; /* success */
}
#endif
if (socklen >= sizeof(struct sockaddr_in)
&& inet_pton(AF_INET, dotted, &a.a4) > 0
) {
((struct sockaddr_in*)sp)->sin_family = AF_INET;
((struct sockaddr_in*)sp)->sin_addr = a.a4;
/* ((struct sockaddr_in*)sp)->sin_port = */
return 0; /* success */
}
return 1;
}
int xsocket_stream_ip4or6(sa_family_t *fp)
{
int fd;
#if ENABLE_FEATURE_IPV6
fd = socket(AF_INET6, SOCK_STREAM, 0);
if (fp) *fp = AF_INET6;
if (fd < 0)
#endif
{
fd = xsocket(AF_INET, SOCK_STREAM, 0);
if (fp) *fp = AF_INET;
}
return fd;
}
int create_and_bind_socket_ip4or6(const char *hostaddr, int port)
{
static const int on = 1;
int fd;
sockaddr_inet 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 bind addr dictates family */
fd = xsocket(sa.sa.sa_family, SOCK_STREAM, 0);
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
/* if (port >= 0) { */
#if ENABLE_FEATURE_IPV6
if (sa.sa.sa_family == AF_INET6 /* && !sa.sin6.sin6_port */)
sa.sin6.sin6_port = htons(port);
#endif
if (sa.sa.sa_family == AF_INET /* && !sa.sin.sin_port */)
sa.sin.sin_port = htons(port);
/* } */
xbind(fd, &sa.sa, sizeof(sa));
return fd;
}
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;
/* TODO maybe: port spec? like n.n.n.n:nn */
#if ENABLE_FEATURE_IPV6
if (socklen >= sizeof(struct sockaddr_in6)
&& inet_pton(AF_INET6, dotted, &a.a6) > 0
) {
((struct sockaddr_in6*)sp)->sin6_family = AF_INET6;
((struct sockaddr_in6*)sp)->sin6_addr = a.a6;
/* ((struct sockaddr_in6*)sp)->sin6_port = */
return 0; /* success */
}
#endif
if (socklen >= sizeof(struct sockaddr_in)
&& inet_pton(AF_INET, dotted, &a.a4) > 0
) {
((struct sockaddr_in*)sp)->sin_family = AF_INET;
((struct sockaddr_in*)sp)->sin_addr = a.a4;
/* ((struct sockaddr_in*)sp)->sin_port = */
return 0; /* success */
}
return 1;
}
int xsocket_stream_ip4or6(sa_family_t *fp)
{
int fd;
#if ENABLE_FEATURE_IPV6
fd = socket(AF_INET6, SOCK_STREAM, 0);
if (fp) *fp = AF_INET6;
if (fd < 0)
#endif
{
fd = xsocket(AF_INET, SOCK_STREAM, 0);
if (fp) *fp = AF_INET;
}
return fd;
}
int create_and_bind_socket_ip4or6(const char *hostaddr, int port)
{
static const int on = 1;
int fd;
sockaddr_inet sa;
memset(&sa, 0, sizeof(sa));
if (hostaddr) {
if (dotted2sockaddr(hostaddr, &sa.sa, sizeof(sa)))
bb_error_msg_and_die("bad address '%s'", hostaddr);
/* user specified bind addr dictates family */
fd = xsocket(sa.sa.sa_family, SOCK_STREAM, 0);
} else
fd = xsocket_stream_ip4or6(&sa.sa.sa_family);
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
/* if (port >= 0) { */
#if ENABLE_FEATURE_IPV6
if (sa.sa.sa_family == AF_INET6 /* && !sa.sin6.sin6_port */)
sa.sin6.sin6_port = htons(port);
#endif
if (sa.sa.sa_family == AF_INET /* && !sa.sin.sin_port */)
sa.sin.sin_port = htons(port);
/* } */
xbind(fd, &sa.sa, sizeof(sa));
return fd;
}