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dpp: factor out PKEX/DPP start prep into function

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In order to slightly rework the DPP state machine to handle
automatically disconnecting (for enrollees) functions need to be
created that isolate everything needed to start DPP/PKEX in case
a disconnect needs to be done first.
This commit is contained in:
James Prestwood 2024-07-24 08:46:37 -07:00 committed by Denis Kenzior
parent fbf8ed4140
commit 30ca00d2c4
1 changed files with 36 additions and 28 deletions
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64
src/dpp.c
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@ -3927,12 +3927,34 @@ static void dpp_start_presence(struct dpp_sm *dpp, uint32_t *limit_freqs,
dpp_start_offchannel(dpp, dpp->current_freq);
}
static void dpp_start_enrollee(struct dpp_sm *dpp)
{
uint32_t freq = band_channel_to_freq(6, BAND_FREQ_2_4_GHZ);
dpp->uri = dpp_generate_uri(dpp->own_asn1, dpp->own_asn1_len, 2,
netdev_get_address(dpp->netdev), &freq,
1, NULL, NULL);
l_ecdh_generate_key_pair(dpp->curve, &dpp->proto_private,
&dpp->own_proto_public);
l_debug("DPP Start Enrollee: %s", dpp->uri);
/*
* Going off spec here. Select a single channel to send presence
* announcements on. This will be advertised in the URI. The full
* presence procedure can be implemented if it is ever needed.
*/
dpp_start_presence(dpp, &freq, 1);
dpp_property_changed_notify(dpp);
}
static struct l_dbus_message *dpp_dbus_start_enrollee(struct l_dbus *dbus,
struct l_dbus_message *message,
void *user_data)
{
struct dpp_sm *dpp = user_data;
uint32_t freq = band_channel_to_freq(6, BAND_FREQ_2_4_GHZ);
struct station *station = station_find(netdev_get_ifindex(dpp->netdev));
if (dpp->state != DPP_STATE_NOTHING ||
@ -3949,30 +3971,14 @@ static struct l_dbus_message *dpp_dbus_start_enrollee(struct l_dbus *dbus,
} else if (!station)
l_debug("No station device, continuing anyways...");
dpp->uri = dpp_generate_uri(dpp->own_asn1, dpp->own_asn1_len, 2,
netdev_get_address(dpp->netdev), &freq,
1, NULL, NULL);
dpp->state = DPP_STATE_PRESENCE;
dpp->role = DPP_CAPABILITY_ENROLLEE;
dpp->interface = DPP_INTERFACE_DPP;
l_ecdh_generate_key_pair(dpp->curve, &dpp->proto_private,
&dpp->own_proto_public);
l_debug("DPP Start Enrollee: %s", dpp->uri);
dpp_start_enrollee(dpp);
dpp->pending = l_dbus_message_ref(message);
/*
* Going off spec here. Select a single channel to send presence
* announcements on. This will be advertised in the URI. The full
* presence procedure can be implemented if it is ever needed.
*/
dpp_start_presence(dpp, &freq, 1);
dpp_property_changed_notify(dpp);
return NULL;
}
@ -4246,19 +4252,12 @@ static void dpp_pkex_scan_destroy(void *user_data)
dpp->pkex_scan_id = 0;
}
static bool dpp_start_pkex_enrollee(struct dpp_sm *dpp, const char *key,
const char *identifier)
static bool dpp_start_pkex_enrollee(struct dpp_sm *dpp)
{
_auto_(l_ecc_point_free) struct l_ecc_point *qi = NULL;
if (identifier)
dpp->pkex_id = l_strdup(identifier);
dpp->pkex_key = l_strdup(key);
memcpy(dpp->peer_addr, broadcast, 6);
dpp->role = DPP_CAPABILITY_ENROLLEE;
dpp->state = DPP_STATE_PKEX_EXCHANGE;
dpp->interface = DPP_INTERFACE_PKEX;
/*
* In theory a driver could support a lesser duration than 200ms. This
* complicates things since we would need to tack on additional
@ -4376,7 +4375,16 @@ static struct l_dbus_message *dpp_dbus_pkex_start_enrollee(struct l_dbus *dbus,
if (!dpp_parse_pkex_args(message, &key, &id))
goto invalid_args;
if (!dpp_start_pkex_enrollee(dpp, key, id))
dpp->pkex_key = l_strdup(key);
if (id)
dpp->pkex_id = l_strdup(id);
dpp->role = DPP_CAPABILITY_ENROLLEE;
dpp->state = DPP_STATE_PKEX_EXCHANGE;
dpp->interface = DPP_INTERFACE_PKEX;
if (!dpp_start_pkex_enrollee(dpp))
goto invalid_args;
return l_dbus_message_new_method_return(message);