if (sess->last_reply) {
res = sendto(data->auth_sock, sess->last_reply->buf,
sess->last_reply->buf_used, 0,
(struct sockaddr *) from, fromlen);
if (res < 0) {
perror("sendto[RADIUS SRV]");
}
return 0;
}
RADIUS_DEBUG("No previous reply available for duplicate "
"message");
return -1;
}
//取得radius请求消息中的eapmsg
eap = radius_msg_get_eap(msg, &eap_len);
if (eap == NULL) {
RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
from_addr);
data->counters.packets_dropped++;
client->counters.packets_dropped++;
return -1;
}
RADIUS_DUMP("Received EAP data", eap, eap_len);
/* FIX: if Code is Request, Success, or Failure, send Access-Reject;
* RFC3579 Sect. 2.6.2.
* Include EAP-Response/Nak with no preferred method if
* code == request.
* If code is not 1-4, discard the packet silently.
* Or is this already done by the EAP state machine? */
//上面注释看，eapserver跟eapstatemachine看来不是一个人写的。
//运行 eap state machine，所处理数据即为sess->eap_if->eapRespData 。
eap_server_sm_step(sess->eap);
if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess ||
sess->eap_if->eapFail) && sess->eap_if->eapReqData) {
//状态为三者之一置位且含有EAPReq数据的话,打印请求数据
RADIUS_DUMP("EAP data from the state machine",
wpabuf_head(sess->eap_if->eapReqData),
wpabuf_len(sess->eap_if->eapReqData));
} else if (sess->eap_if->eapFail) {
RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
"set");
} else if (eap_sm_method_pending(sess->eap)) {
//eap处理过程中，有可能是具体eapmethod如eap-sim/aka等在处理过程中需要外发请求数据等待响应等情况。
if (sess->last_msg) {
radius_msg_free(sess->last_msg);
os_free(sess->last_msg);
}
sess->last_msg = msg;
sess->last_from_port = from_port;
os_free(sess->last_from_addr);
sess->last_from_addr = os_strdup(from_addr);
sess->last_fromlen = fromlen;
os_memcpy(&sess->last_from, from, fromlen);
return -2;
} else {
RADIUS_DEBUG("No EAP data from the state machine - ignore this"
" Access-Request silently (assuming it was a "
"duplicate)");
data->counters.packets_dropped++;
client->counters.packets_dropped++;
return -1;
}
//多轮交互后sess完成的标志，成功 or 失败？
if (sess->eap_if->eapSuccess || sess->eap_if->eapFail)
is_complete = 1;
