/*
* NAME: ip_bindery
* USAGE: Establish a local passive (listening) socket at the given port.
* ARGS: family - AF_INET is the only supported argument.
* port - The port to establish the connection upon. May be 0,
* which requests any open port.
* storage - Pointer to a sockaddr structure big enough for the
* specified family. Upon success, it will be filled with
* the local sockaddr of the new connection.
* NOTES: In most cases, the local address for 'storage' will be INADDR_ANY
* which doesn't really give you any useful information. It is not
* possible to authoritatively figure out the local IP address
* without using ioctl(). However, we guess the best we may.
*
* NOTES: This function lacks IPv6 support.
* This function lacks Unix Domain Socket support.
*/
int ip_bindery (int family, unsigned short port, SS *storage)
{
socklen_t len;
int fd;
if (inet_vhostsockaddr(family, port, NULL, storage, &len))
{
syserr(-1, "ip_bindery: inet_vhostsockaddr(%d,%d) failed.",
family, port);
return -1;
}
if (!len)
{
syserr(-1, "ip_bindery: inet_vhostsockaddr(%d,%d) didn't "
"return an address I could bind", family, port);
return -1;
}
if ((fd = client_bind((SA *)storage, len)) < 0)
{
syserr(-1, "ip_bindery: client_bind(%d,%d) failed.", family, port);
return -1;
}
return fd;
}
/*
* NAME: ip_bindery
* USAGE: Establish a local passive (listening) socket at the given port.
* ARGS: family - AF_INET is the only supported argument.
* port - The port to establish the connection upon. May be 0,
* which requests any open port.
* storage - Pointer to a sockaddr structure big enough for the
* specified family. Upon success, it will be filled with
* the local sockaddr of the new connection.
* NOTES: In most cases, the local address for 'storage' will be INADDR_ANY
* which doesn't really give you any useful information. It is not
* possible to authoritatively figure out the local IP address
* without using ioctl(). However, we guess the best we may.
*
* NOTES: This function lacks IPv6 support.
* This function lacks Unix Domain Socket support.
*/
int ip_bindery (int family, unsigned short port, SS *storage)
{
int err;
socklen_t len;
if ((err = inet_vhostsockaddr(family, port, storage, &len)))
return err;
if (!len)
return -6;
return client_bind((SA *)storage, len);
}
/*
* NAME: connectory
* USAGE: Connect to a given "host" and "port" with the given "family"
* ARGS: family - AF_INET is the only supported argument.
* host - A hostname or "dotted quad" (or equivalent).
* port - The remote port to connect to in *HOST ORDER*.
*
* XXX - This so violates everything I really wanted this function to be,
* but I changed it to call getaddrinfo() directly instead of calling
* inet_vhostsockaddr() because I wanted it to be able to take advantage
* of connecting to multiple protocols and multiple ip addresses (for things
* like ``us.undernet.org'') without having to do multiple calls to
* getaddrinfo() which could be quite costly.
*/
int connectory (int family, const char *host, const char *port)
{
AI hints, *results, *ai;
int err;
int fd;
SS localaddr;
socklen_t locallen;
memset(&hints, 0, sizeof(hints));
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM;
if ((err = Getaddrinfo(host, port, &hints, &results)))
{
yell("Hostname lookup for [%s:%s] failed: %s (%d)", host, port, gai_strerror(err), err);
return -5;
}
fd = -1;
for (ai = results; ai; ai = ai->ai_next)
{
/* First, look up the virtual host we use for this protocol. */
err = inet_vhostsockaddr(ai->ai_family, -1, &localaddr, &locallen);
if (err < 0)
continue;
/* Now try to do the connection. */
fd = client_connect((SA *)&localaddr, locallen, ai->ai_addr, ai->ai_addrlen);
if (fd < 0)
{
err = fd;
fd = -1;
continue;
}
else
break;
}
Freeaddrinfo(results);
if (fd < 0)
return err;
return fd;
}
