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conf, tap: Add option to quit once the client closes the connection

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This is practical to avoid explicit lifecycle management in users,
e.g. libvirtd, and is trivial to implement.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Stefano Brivio 2022-10-07 04:01:56 +02:00
parent 9de65dd3f4
commit a62ed181db
4 changed files with 27 additions and 1 deletions

17
conf.c
View file

@ -712,6 +712,7 @@ static void usage(const char *name)
if (strstr(name, "pasta"))
goto pasta_opts;
info( " -1, --one-off Quit after handling one single client");
info( " -t, --tcp-ports SPEC TCP port forwarding to guest");
info( " can be specified multiple times");
info( " SPEC can be:");
@ -1023,6 +1024,7 @@ void conf(struct ctx *c, int argc, char **argv)
{"no-map-gw", no_argument, &c->no_map_gw, 1 },
{"ipv4-only", no_argument, NULL, '4' },
{"ipv6-only", no_argument, NULL, '6' },
{"one-off", no_argument, NULL, '1' },
{"tcp-ports", required_argument, NULL, 't' },
{"udp-ports", required_argument, NULL, 'u' },
{"tcp-ns", required_argument, NULL, 'T' },
@ -1062,7 +1064,7 @@ void conf(struct ctx *c, int argc, char **argv)
c->no_dhcp_dns = c->no_dhcp_dns_search = 1;
optstring = "dqfel:hI:p:P:m:a:n:M:g:i:D:S:46t:u:T:U:";
} else {
optstring = "dqfel:hs:p:P:m:a:n:M:g:i:D:S:46t:u:";
optstring = "dqfel:hs:p:P:m:a:n:M:g:i:D:S:461t:u:";
}
c->tcp.fwd_in.mode = c->tcp.fwd_out.mode = 0;
@ -1488,6 +1490,19 @@ void conf(struct ctx *c, int argc, char **argv)
case '6':
v6_only = true;
break;
case '1':
if (c->mode != MODE_PASST) {
err("--one-off is for passt mode only");
usage(argv[0]);
}
if (c->one_off) {
err("Redundant --one-off option");
usage(argv[0]);
}
c->one_off = true;
break;
case 't':
case 'u':
case 'T':