static struct wpabuf *
eap_pwd_build_req(struct eap_sm *sm, void *priv, u8 id)
{
struct eap_pwd_data *data = priv;
switch (data->state) {
case PWD_ID_Req:
return eap_pwd_build_id_req(sm, data, id);
case PWD_Commit_Req:
return eap_pwd_build_commit_req(sm, data, id);
case PWD_Confirm_Req:
return eap_pwd_build_confirm_req(sm, data, id);
default:
wpa_printf(MSG_INFO, "EAP-pwd: Unknown state %d in build_req",
data->state);
break;
}
return NULL;
}
static struct wpabuf *
eap_pwd_build_req(struct eap_sm *sm, void *priv, u8 id)
{
struct eap_pwd_data *data = priv;
struct wpabuf *req;
u8 lm_exch;
const u8 *buf;
u16 totlen = 0;
size_t len;
/*
* if we're buffering response fragments then just ACK
*/
if (data->in_frag_pos) {
wpa_printf(MSG_DEBUG, "EAP-pwd: ACKing a fragment!!");
req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_PWD,
EAP_PWD_HDR_SIZE, EAP_CODE_REQUEST, id);
if (req == NULL) {
eap_pwd_state(data, FAILURE);
return NULL;
}
switch (data->state) {
case PWD_ID_Req:
wpabuf_put_u8(req, EAP_PWD_OPCODE_ID_EXCH);
break;
case PWD_Commit_Req:
wpabuf_put_u8(req, EAP_PWD_OPCODE_COMMIT_EXCH);
break;
case PWD_Confirm_Req:
wpabuf_put_u8(req, EAP_PWD_OPCODE_CONFIRM_EXCH);
break;
default:
eap_pwd_state(data, FAILURE); /* just to be sure */
wpabuf_free(req);
return NULL;
}
return req;
}
/*
* build the data portion of a request
*/
switch (data->state) {
case PWD_ID_Req:
eap_pwd_build_id_req(sm, data, id);
lm_exch = EAP_PWD_OPCODE_ID_EXCH;
break;
case PWD_Commit_Req:
eap_pwd_build_commit_req(sm, data, id);
lm_exch = EAP_PWD_OPCODE_COMMIT_EXCH;
break;
case PWD_Confirm_Req:
eap_pwd_build_confirm_req(sm, data, id);
lm_exch = EAP_PWD_OPCODE_CONFIRM_EXCH;
break;
default:
wpa_printf(MSG_INFO, "EAP-pwd: Unknown state %d in build_req",
data->state);
eap_pwd_state(data, FAILURE);
lm_exch = 0; /* hush now, sweet compiler */
break;
}
if (data->state == FAILURE)
return NULL;
/*
* determine whether that data needs to be fragmented
*/
len = wpabuf_len(data->outbuf) - data->out_frag_pos;
if ((len + EAP_PWD_HDR_SIZE) > data->mtu) {
len = data->mtu - EAP_PWD_HDR_SIZE;
EAP_PWD_SET_MORE_BIT(lm_exch);
/*
* if this is the first fragment, need to set the M bit
* and add the total length to the eap_pwd_hdr
*/
if (data->out_frag_pos == 0) {
EAP_PWD_SET_LENGTH_BIT(lm_exch);
totlen = wpabuf_len(data->outbuf) +
EAP_PWD_HDR_SIZE + sizeof(u16);
len -= sizeof(u16);
wpa_printf(MSG_DEBUG, "EAP-pwd: Fragmenting output, "
"total length = %d", totlen);
}
wpa_printf(MSG_DEBUG, "EAP-pwd: Send a %d byte fragment",
(int) len);
}
/*
* alloc an eap request and populate it with the data
*/
req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_PWD,
EAP_PWD_HDR_SIZE + len +
(totlen ? sizeof(u16) : 0),
EAP_CODE_REQUEST, id);
if (req == NULL) {
eap_pwd_state(data, FAILURE);
return NULL;
}
wpabuf_put_u8(req, lm_exch);
if (EAP_PWD_GET_LENGTH_BIT(lm_exch))
wpabuf_put_be16(req, totlen);
buf = wpabuf_head_u8(data->outbuf);
wpabuf_put_data(req, buf + data->out_frag_pos, len);
data->out_frag_pos += len;
/*
* either not fragged or last fragment, either way free up the data
*/
if (data->out_frag_pos >= wpabuf_len(data->outbuf)) {
wpabuf_free(data->outbuf);
data->outbuf = NULL;
data->out_frag_pos = 0;
}
return req;
}
