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DPP2: GAS Comeback Request for the TCP case

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Make the Enrollee handle GAS comeback delay when performing DPP over
TCP.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This commit is contained in:
Jouni Malinen 2020-06-18 13:14:25 +03:00 committed by Jouni Malinen
parent a352c7230d
commit 68d9586a46
1 changed files with 45 additions and 2 deletions
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47
src/common/dpp_tcp.c
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@ -38,6 +38,7 @@ struct dpp_connection {
unsigned int on_tcp_tx_complete_gas_done:1;
unsigned int on_tcp_tx_complete_remove:1;
unsigned int on_tcp_tx_complete_auth_ok:1;
u8 gas_dialog_token;
};
/* Remote Controller */
@ -69,6 +70,7 @@ static void dpp_conn_tx_ready(int sock, void *eloop_ctx, void *sock_ctx);
static void dpp_controller_auth_success(struct dpp_connection *conn,
int initiator);
static void dpp_tcp_build_csr(void *eloop_ctx, void *timeout_ctx);
static void dpp_tcp_gas_query_comeback(void *eloop_ctx, void *timeout_ctx);
static void dpp_connection_free(struct dpp_connection *conn)
@ -83,6 +85,7 @@ static void dpp_connection_free(struct dpp_connection *conn)
eloop_cancel_timeout(dpp_controller_conn_status_result_wait_timeout,
conn, NULL);
eloop_cancel_timeout(dpp_tcp_build_csr, conn, NULL);
eloop_cancel_timeout(dpp_tcp_gas_query_comeback, conn, NULL);
wpabuf_free(conn->msg);
wpabuf_free(conn->msg_out);
dpp_auth_deinit(conn->auth);
@ -1150,13 +1153,38 @@ static int dpp_tcp_rx_gas_resp(struct dpp_connection *conn, struct wpabuf *resp)
}
static void dpp_tcp_gas_query_comeback(void *eloop_ctx, void *timeout_ctx)
{
struct dpp_connection *conn = eloop_ctx;
struct dpp_authentication *auth = conn->auth;
struct wpabuf *msg;
if (!auth)
return;
wpa_printf(MSG_DEBUG, "DPP: Send GAS Comeback Request");
msg = wpabuf_alloc(4 + 2);
if (!msg)
return;
wpabuf_put_be32(msg, 2);
wpabuf_put_u8(msg, WLAN_PA_GAS_COMEBACK_REQ);
wpabuf_put_u8(msg, conn->gas_dialog_token);
wpa_hexdump_buf(MSG_MSGDUMP, "DPP: Outgoing TCP message", msg);
wpabuf_free(conn->msg_out);
conn->msg_out_pos = 0;
conn->msg_out = msg;
dpp_tcp_send(conn);
}
static int dpp_rx_gas_resp(struct dpp_connection *conn, const u8 *msg,
size_t len)
{
struct wpabuf *buf;
u8 dialog_token;
const u8 *pos, *end, *next, *adv_proto;
u16 status, slen;
u16 status, slen, comeback_delay;
if (len < 5 + 2)
return -1;
@ -1174,7 +1202,8 @@ static int dpp_rx_gas_resp(struct dpp_connection *conn, const u8 *msg,
return -1;
}
pos += 2;
pos += 2; /* ignore GAS Comeback Delay */
comeback_delay = WPA_GET_LE16(pos);
pos += 2;
adv_proto = pos++;
slen = *pos++;
@ -1199,6 +1228,20 @@ static int dpp_rx_gas_resp(struct dpp_connection *conn, const u8 *msg,
if (slen > end - pos)
return -1;
if (comeback_delay) {
unsigned int secs, usecs;
conn->gas_dialog_token = dialog_token;
secs = (comeback_delay * 1024) / 1000000;
usecs = comeback_delay * 1024 - secs * 1000000;
wpa_printf(MSG_DEBUG, "DPP: Comeback delay: %u",
comeback_delay);
eloop_cancel_timeout(dpp_tcp_gas_query_comeback, conn, NULL);
eloop_register_timeout(secs, usecs, dpp_tcp_gas_query_comeback,
conn, NULL);
return 0;
}
buf = wpabuf_alloc(slen);
if (!buf)
return -1;