/*****************************************************************************
函 数 名 : chap_Success
功能描述 : 构造Success帧并发送
输入参数 : l - PPP链接
输出参数 : 无
返 回 值 : 无
调用函数 :
被调函数 :
修改历史 :
1.日 期 : 2008年10月25日
作 者 : liukai
修改内容 : porting from BSD
*****************************************************************************/
static VOS_VOID chap_Success(struct link *l)
{
struct authinfo *authp = &(l->chap.auth);
const VOS_CHAR *pcMsg = "Welcome!!"; /* follow BSD use "Welcome!!" as message */
/* Success body: */
/*
* -------------
* | Message |
* -------------
*/
ChapOutput(l, CHAP_SUCCESS, authp->id, (VOS_UCHAR *)pcMsg, VOS_StrLen((VOS_CHAR *)pcMsg), VOS_NULL_PTR);
l->lcp.auth_ineed = 0; /* after Authentication, clear flag to authenticate peer */
if (0 == l->lcp.auth_iwait) /* auth_iwait: 0, authentication to peer is not complete or no need to authentication,
!0, authentication to peer is complete */
{
/*
* Either I didn't need to authenticate, or I've already been
* told that I got the answer right.
*/
chap_ReInit(&(l->chap));
if (PHASE_AUTHENTICATE == l->phase)
{
l->phase = PHASE_NETWORK;
l->ipcp.fsm.state = ST_CLOSED;
fsm_Open(&(l->ipcp.fsm));
PPP_MNTN_LOG(PS_PID_APP_PPP, 0, PS_PRINT_NORMAL, "goto ipcp stage!\r\n");
}
}
return;
} /* chap_Success */
static void
datalink_AuthReInit(struct datalink *dl)
{
auth_StopTimer(&dl->pap);
auth_StopTimer(&dl->chap.auth);
chap_ReInit(&dl->chap);
}
/*****************************************************************************
函 数 名 : chap_Input
功能描述 : 收到CHAP帧的处理入口函数
输入参数 : l - PPP链接
pstMem - 收到的CHAP帧
输出参数 : 无
返 回 值 : NULL
调用函数 :
被调函数 :
修改历史 :
1.日 期 : 2008年10月24日
作 者 : liukai
修改内容 : porting from BSD
*****************************************************************************/
PPP_ZC_STRU *chap_Input(struct link *l, PPP_ZC_STRU *pstMem)
{
struct chap *chap;
VOS_INT32 len;
VOS_UCHAR alen; /* answer length: challenge or response body length */
struct ppp_mbuf *bp;
VOS_UCHAR aucHashValue[MD5DIGESTSIZE];
bp = ppp_m_get_from_ttfmem(pstMem);
PPP_MemFree(pstMem);
if (VOS_NULL_PTR == bp)
{
return VOS_NULL_PTR;
}
if (VOS_NULL_PTR == l) {
PPP_MNTN_LOG(PS_PID_APP_PPP, 0, PS_PRINT_WARNING, "Chap Input: Not a physical link - dropped\r\n");
ppp_m_freem(bp);
return VOS_NULL_PTR;
}
if ((PHASE_NETWORK != l->phase) &&
(PHASE_AUTHENTICATE != l->phase)) {
PPP_MNTN_LOG(PS_PID_APP_PPP, 0, PS_PRINT_NORMAL, "Unexpected Chap input - dropped\r\n");
ppp_m_freem(bp);
return VOS_NULL_PTR;
}
chap = &(l->chap);
if ((VOS_NULL_PTR == (bp = auth_ReadHeader(&chap->auth, bp))) &&
(0 == VOS_NTOHS(chap->auth.in.hdr.length)))
{
PPP_MNTN_LOG(PS_PID_APP_PPP, 0, PS_PRINT_WARNING, "Chap Input: Truncated header\r\n");
}
else if ((0 == chap->auth.in.hdr.code) || ((VOS_UINT8)(chap->auth.in.hdr.code) > MAXCHAPCODE))
{
PPP_MNTN_LOG1(PS_PID_APP_PPP, 0, LOG_LEVEL_WARNING,
"Chap Input: Bad CHAP code %d !\r\n", chap->auth.in.hdr.code);
}
else {
len = ppp_m_length(bp);
/* Identifier of rx-ed Response, Success, Fail should match Challenge tx-ed */
if ((CHAP_CHALLENGE != chap->auth.in.hdr.code) &&
(chap->auth.id != chap->auth.in.hdr.id)) {
/* Wrong conversation dude ! */
PPP_MNTN_LOG3(PS_PID_APP_PPP, 0, PS_PRINT_NORMAL,
"Chap Input: code <1> dropped (got id <2> not equal to previous id <3>)\r\n",
chap->auth.in.hdr.code, chap->auth.in.hdr.id, chap->auth.id);
ppp_m_freem(bp);
return VOS_NULL_PTR;
}
chap->auth.id = chap->auth.in.hdr.id; /* We respond with this id */
if (CHAP_CHALLENGE == chap->auth.in.hdr.code) /* rx-ed challenge */
{
bp = ppp_mbuf_Read(bp, &alen, 1); /* fetch length of peer's challenge */
len -= (alen + 1); /* after this step, len is length of peer's name */
if (len < 0) {
PPP_MNTN_LOG2(PS_PID_APP_PPP, 0, LOG_LEVEL_WARNING,
"Chap Input: Truncated challenge (len %d, alen %d)!\r\n", len, alen);
ppp_m_freem(bp);
return VOS_NULL_PTR;
}
if (AUTHLEN < len)
{
PPP_MNTN_LOG2(PS_PID_APP_PPP, 0, LOG_LEVEL_WARNING,
"Chap Input: name of challenge too long (len %d, alen %d)!\r\n", len, alen);
ppp_m_freem(bp);
return VOS_NULL_PTR;
}
if (CHAPCHALLENGELEN < alen)
{
PPP_MNTN_LOG1(PS_PID_APP_PPP, 0, LOG_LEVEL_WARNING,
"Chap Input: challenge too long (len %d)!\r\n", alen);
ppp_m_freem(bp);
return VOS_NULL_PTR;
}
*chap->challenge.peer = alen;
bp = ppp_mbuf_Read(bp, chap->challenge.peer + 1, alen); /* record peer's challenge */
bp = auth_ReadName(&chap->auth, bp, len); /* record peer's name */
if (*chap->auth.in.name) /* challenge with name */
{
PPP_MNTN_LOG2(PS_PID_APP_PPP, 0, LOG_LEVEL_WARNING,
"Chap Input: challenge (len %d, alen %d) with name\r\n",
len, alen);
}
else /* without name */
{
PPP_MNTN_LOG2(PS_PID_APP_PPP, 0, LOG_LEVEL_WARNING,
"Chap Input: challenge (len %d, alen %d) without name\r\n",
len, alen);
}
chap_Respond(l, "HUAWEI_CHAP_CLNT"); /* we always use "HUAWEI_CHAP_CLNT" as Name of Response */
} /* end of rx-ed challenge */
else if (CHAP_RESPONSE == chap->auth.in.hdr.code) /* rx-ed response */
{
bp = ppp_mbuf_Read(bp, &alen, 1); /* read HASH-Size */
if (MD5DIGESTSIZE != alen) /* as just support MD5, must be 16 octets */
{
PPP_MNTN_LOG1(PS_PID_APP_PPP, 0, LOG_LEVEL_WARNING,
"Chap Input: Hash-Size %f is not correct !\r\n", alen);
ppp_m_freem(bp);
return VOS_NULL_PTR;
}
len -= (alen + 1); /* after this step, len is length of Name Field */
if (len < 0) {
PPP_MNTN_LOG2(PS_PID_APP_PPP, 0, LOG_LEVEL_WARNING,
"Chap Input: Truncated response (len %d, alen %d)!\r\n", len, alen);
ppp_m_freem(bp);
return VOS_NULL_PTR;
}
if (AUTHLEN < len)
{
PPP_MNTN_LOG2(PS_PID_APP_PPP, 0, LOG_LEVEL_WARNING,
"Chap Input: name of response too long (len %d, alen %d)!\r\n", len, alen);
ppp_m_freem(bp);
return VOS_NULL_PTR;
}
bp = ppp_mbuf_Read(bp, aucHashValue, MD5DIGESTSIZE); /* cut HASH value */
bp = auth_ReadName(&chap->auth, bp, len);
if (*chap->auth.in.name)
{
PPP_MNTN_LOG2(PS_PID_APP_PPP, 0, PS_PRINT_NORMAL,"Chap Input: response (len <1>, alen <2>) with name\r\n",
len, alen);
}
else
{
PPP_MNTN_LOG2(PS_PID_APP_PPP, 0, PS_PRINT_NORMAL,"Chap Input: response (len <1>, alen <2>) without name\r\n",
len, alen);
}
if (PHASE_AUTHENTICATE == l->phase) /* 需要注意只备份在认证阶段中与challenge id匹配的response */
{
ChapBufferResponsePacket(chap, MD5DIGESTSIZE, aucHashValue, len);
}
chap_Success(l);
/*
Moves code to here as the last step of dealing with response by liukai,
it should stop authentication timer after authentication pass or fail.
Stops timer at first, a response frame format is not correct and discards it(way of BSD),
UE has no chance to send challenge again
*/
auth_StopTimer(&(chap->auth));
} /* end of rx-ed response */
else if (CHAP_SUCCESS == chap->auth.in.hdr.code) /* rx-ed success */
{
/* chap->auth.in.name is already set up at CHALLENGE time, need NOT to print again */
if (0 < len)
{
PPP_MNTN_LOG(PS_PID_APP_PPP, 0, PS_PRINT_NORMAL, "Chap Input: success with message\r\n");
}
else
{
PPP_MNTN_LOG(PS_PID_APP_PPP, 0, PS_PRINT_NORMAL, "Chap Input: success without message\r\n");
}
if (PROTO_CHAP == l->lcp.auth_iwait) {
l->lcp.auth_iwait = 0;
if (0 == l->lcp.auth_ineed) /* auth_ineed: 0, authentication by peer is not complete or no need to authentication,
!0, authentication by peer is complete */
{
/*
* We've succeeded in our ``login''
* If we're not expecting the peer to authenticate (or he already
* has), proceed to network phase.
*/
chap_ReInit(&(l->chap));
if (PHASE_AUTHENTICATE == l->phase)
{
l->phase = PHASE_NETWORK;
l->ipcp.fsm.state = ST_CLOSED;
fsm_Open(&(l->ipcp.fsm));
PPP_MNTN_LOG(PS_PID_APP_PPP, 0, PS_PRINT_NORMAL, "goto ipcp stage!\r\n");
}
}
}
} /* end of rx-ed success */
else /* rx-ed fail */
{
/* chap->auth.in.name is already set up at CHALLENGE time, need NOT to print again */
if (0 < len)
{
PPP_MNTN_LOG(PS_PID_APP_PPP, 0, PS_PRINT_NORMAL, "Chap Input: fail with message\r\n");
}
else
{
PPP_MNTN_LOG(PS_PID_APP_PPP, 0, PS_PRINT_NORMAL, "Chap Input: fail without message\r\n");
}
chap_Cleanup(&(l->chap));
l->phase = PHASE_TERMINATE;
fsm_Close(&(l->lcp.fsm));
PPP_MNTN_LOG(PS_PID_APP_PPP, 0, PS_PRINT_NORMAL, "goto lcp stage!\r\n");
} /* end of rx-ed fail */
}
ppp_m_freem(bp);
return VOS_NULL_PTR;
} /* chap_Input */
