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add wireguard probe

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Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
This commit is contained in:
Toni Uhlig 2022-08-26 12:21:11 +02:00
parent fb8fe57bd8
commit b971f3edcd
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GPG Key ID: 22C5333D922537D2
2 changed files with 23 additions and 0 deletions
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18
probe.c
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@ -33,6 +33,7 @@
static int is_ssh_protocol(const char *p, ssize_t len, struct sslhcfg_protocols_item*);
static int is_openvpn_protocol(const char *p, ssize_t len, struct sslhcfg_protocols_item*);
static int is_wireguard_protocol(const char *p, ssize_t len, struct sslhcfg_protocols_item*);
static int is_tinc_protocol(const char *p, ssize_t len, struct sslhcfg_protocols_item*);
static int is_xmpp_protocol(const char *p, ssize_t len, struct sslhcfg_protocols_item*);
static int is_http_protocol(const char *p, ssize_t len, struct sslhcfg_protocols_item*);
@ -49,6 +50,7 @@ static struct protocol_probe_desc builtins[] = {
/* description probe */
{ "ssh", is_ssh_protocol},
{ "openvpn", is_openvpn_protocol },
{ "wireguard", is_wireguard_protocol },
{ "tinc", is_tinc_protocol },
{ "xmpp", is_xmpp_protocol },
{ "http", is_http_protocol },
@ -185,6 +187,22 @@ static int is_openvpn_protocol (const char*p,ssize_t len, struct sslhcfg_protoco
}
}
static int is_wireguard_protocol(const char *p, ssize_t len, struct sslhcfg_protocols_item* proto)
{
if (proto->is_udp == 0)
return PROBE_NEXT;
// Handshake Init: 148 bytes
if (len != 148)
return PROBE_NEXT;
// Handshake Init: p[0] = 0x01, p[1..3] = 0x000000 (reserved)
if (ntohl(*(uint32_t*)p) != 0x01000000)
return PROBE_NEXT;
return PROBE_MATCH;
}
/* Is the buffer the beginning of a tinc connections?
* Protocol is documented here: http://www.tinc-vpn.org/documentation/tinc.pdf
* First connection starts with "0 " in 1.0.15)

5
sslh-main.c
View File

@ -202,6 +202,11 @@ void config_sanity_check(struct sslhcfg_item* cfg)
cfg->protocols[i].name, cfg->protocols[i].host, cfg->protocols[i].port);
exit(1);
}
} else {
if (!strcmp(cfg->protocols[i].name, "wireguard")) {
print_message(msg_config_error, "Wireguard works only with UDP\n");
exit(1);
}
}
}
}