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eap: Add retransmission support

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This commit is contained in:
Denis Kenzior 2016-11-29 16:31:22 -06:00
parent 32d623a09e
commit bd9e1883ee
2 changed files with 14 additions and 19 deletions
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31
src/eap.c
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@ -173,17 +173,25 @@ static void eap_send_identity_response(struct eap_state *eap, char *identity)
eap_send_response(eap, EAP_TYPE_IDENTITY, buf, len + 5); eap_send_response(eap, EAP_TYPE_IDENTITY, buf, len + 5);
} }
static void eap_handle_request(struct eap_state *eap, static void eap_handle_request(struct eap_state *eap, uint16_t id,
const uint8_t *pkt, size_t len) const uint8_t *pkt, size_t len)
{ {
enum eap_type type; enum eap_type type;
uint8_t buf[10]; uint8_t buf[10];
int buf_len; int buf_len;
void (*op)(struct eap_state *eap,
const uint8_t *pkt, size_t len);
if (len < 1) if (len < 1)
/* Invalid packets to be ignored */ /* Invalid packets to be ignored */
return; return;
if (id == eap->last_id)
op = eap->method->handle_retransmit;
else
op = eap->method->handle_request;
eap->last_id = id;
type = pkt[0]; type = pkt[0];
if (type >= __EAP_TYPE_MIN_METHOD) { if (type >= __EAP_TYPE_MIN_METHOD) {
@ -196,7 +204,7 @@ static void eap_handle_request(struct eap_state *eap,
} }
if (type != EAP_TYPE_EXPANDED) { if (type != EAP_TYPE_EXPANDED) {
eap->method->handle_request(eap, pkt + 1, len - 1); op(eap, pkt + 1, len - 1);
return; return;
} }
@ -207,7 +215,7 @@ static void eap_handle_request(struct eap_state *eap,
if (len < 8) if (len < 8)
return; return;
eap->method->handle_request(eap, pkt + 8, len - 8); op(eap, pkt + 8, len - 8);
return; return;
} }
@ -266,22 +274,7 @@ void eap_rx_packet(struct eap_state *eap, const uint8_t *pkt, size_t len)
switch ((enum eap_code) code) { switch ((enum eap_code) code) {
case EAP_CODE_REQUEST: case EAP_CODE_REQUEST:
if (id == eap->last_id) { eap_handle_request(eap, id, pkt + 4, eap_len - 4);
/*
* We should resend the last response if this ever
* happens and if one was sent already. This can
* happen if the request_credentials callback needs
* to wait for user input. We can assume a reliable
* lower layer but the retransmission behaviour is
* decided by the authenticator (Section 4.3).
*/
return;
}
eap->last_id = id;
eap_handle_request(eap, pkt + 4, eap_len - 4);
return; return;
case EAP_CODE_FAILURE: case EAP_CODE_FAILURE:

2
src/eap.h
View File

@ -98,6 +98,8 @@ struct eap_method {
void (*handle_request)(struct eap_state *eap, void (*handle_request)(struct eap_state *eap,
const uint8_t *pkt, size_t len); const uint8_t *pkt, size_t len);
void (*handle_retransmit)(struct eap_state *eap,
const uint8_t *pkt, size_t len);
}; };
struct eap_method_desc { struct eap_method_desc {