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iwd
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peap: response fragmentation support

This commit is contained in:
Tim Kourt 2018-02-02 10:30:35 -08:00 committed by Denis Kenzior
parent 71ebb7c1d5
commit c5ec12e0e4
1 changed files with 59 additions and 0 deletions
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59
src/eap-peap.c
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@ -64,6 +64,11 @@ struct eap_peap_state {
size_t rx_pdu_buf_len;
size_t rx_pdu_buf_offset;
size_t tx_frag_offset;
size_t tx_frag_last_len;
bool expecting_frag_ack:1;
char *ca_cert;
char *client_cert;
char *client_key;
@ -120,6 +125,32 @@ static void eap_peap_free(struct eap_state *eap)
static void eap_peap_send_fragment(struct eap_state *eap)
{
struct eap_peap_state *peap = eap_get_data(eap);
size_t mtu = eap_get_mtu(eap);
uint8_t buf[mtu];
size_t len = peap->tx_pdu_buf_len - peap->tx_frag_offset;
size_t header_len = PEAP_HEADER_LEN;
buf[PEAP_HEADER_OCTET_FLAGS] = peap->version;
if (len > mtu - PEAP_HEADER_LEN) {
len = mtu - PEAP_HEADER_LEN;
buf[PEAP_HEADER_OCTET_FLAGS] |= PEAP_FLAG_M;
peap->expecting_frag_ack = true;
}
if (!peap->tx_frag_offset) {
buf[PEAP_HEADER_OCTET_FLAGS] |= PEAP_FLAG_L;
l_put_be32(peap->tx_pdu_buf_len,
&buf[PEAP_HEADER_OCTET_FRAG_LEN]);
len -= 4;
header_len += 4;
}
memcpy(buf + header_len, peap->tx_pdu_buf + peap->tx_frag_offset, len);
eap_send_response(eap, EAP_TYPE_PEAP, buf, header_len + len);
peap->tx_frag_last_len = len;
}
static void eap_peap_send_response(struct eap_state *eap,
@ -138,6 +169,7 @@ static void eap_peap_send_response(struct eap_state *eap,
return;
}
peap->tx_frag_offset = 0;
eap_peap_send_fragment(eap);
}
@ -242,6 +274,26 @@ static void eap_peap_send_fragmented_request_ack(struct eap_state *eap)
eap_peap_send_empty_response(eap);
}
static bool eap_peap_handle_fragmented_response_ack(struct eap_state *eap,
size_t len)
{
struct eap_peap_state *peap = eap_get_data(eap);
if (len)
return false;
if (!peap->tx_frag_last_len)
return false;
peap->tx_frag_offset += peap->tx_frag_last_len;
peap->tx_frag_last_len = 0;
peap->expecting_frag_ack = false;
eap_peap_send_fragment(eap);
return true;
}
static bool eap_peap_validate_version(struct eap_state *eap,
uint8_t flags_version)
{
@ -324,6 +376,13 @@ static void eap_peap_handle_request(struct eap_state *eap,
pkt += 1;
len -= 1;
if (peap->expecting_frag_ack) {
if (!eap_peap_handle_fragmented_response_ack(eap, len))
goto error;
return;
}
if (flags_version & PEAP_FLAG_L || peap->rx_pdu_buf) {
int r = eap_peap_handle_fragmented_request(eap, pkt, len,
flags_version);