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Unix: allow connecting to Unix sockets by absolute path.

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Now you can type an absolute pathname (starting with '/') into the
hostname box in Unix GUI PuTTY, or into the hostname slot on the Unix
Plink command line, and the effect will be that PuTTY makes an AF_UNIX
connection to the specified Unix-domain socket in place of a TCP/IP
connection.

I don't _yet_ know of anyone running SSH on a Unix-domain socket, but
at the very least it'll be useful to me for debugging and testing, and
I'm pretty sure there will be other specialist uses sooner or later.
This commit is contained in:
Simon Tatham 2020-02-16 16:22:17 +00:00
parent 37d91aabff
commit ee456a48ad
1 changed files with 6 additions and 2 deletions
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8
unix/uxnet.c
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@ -186,6 +186,11 @@ void sk_cleanup(void)
SockAddr *sk_namelookup(const char *host, char **canonicalname, int address_family)
{
if (host[0] == '/') {
*canonicalname = dupstr(host);
return unix_sock_addr(host);
}
SockAddr *ret = snew(SockAddr);
#ifndef NO_IPV6
struct addrinfo hints;
@ -604,7 +609,7 @@ static int try_connect(NetSocket *sock)
}
}
if (sock->nodelay) {
if (sock->nodelay && family != AF_UNIX) {
int b = 1;
if (setsockopt(s, IPPROTO_TCP, TCP_NODELAY,
(void *) &b, sizeof(b)) < 0) {
@ -706,7 +711,6 @@ static int try_connect(NetSocket *sock)
break;
#endif
case AF_UNIX:
assert(sock->port == 0); /* to catch confused people */
assert(strlen(sock->addr->hostname) < sizeof u.su.sun_path);
u.su.sun_family = AF_UNIX;
strcpy(u.su.sun_path, sock->addr->hostname);