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求snmp trap 发送的源码或相关报道

楼主GX_NET（小C）2003-09-03 05:18:05 在 VC/MFC / 网络编程提问

接收没问题，但是不知道如何发送trap，如果用socket 自己组包是不是不太合理
直接用snmp api 函数如何求得那？？？高分求解问题点数：100、回复次数：15Top

1 楼njtlxm（似是故人来）回复于 2003-09-03 09:02:17 得分 0

你说的好像有道理，但是事实上恰恰相反，用socket组包是最合理的，用snmp api反而很晕。当然，你首先得仔细看看trap协议格式，尤其是vblist的格式Top

2 楼GX_NET（小C）回复于 2003-09-09 20:25:08 得分 0

谢谢，大家继续说呀Top

3 楼GX_NET（小C）回复于 2003-09-09 23:44:44 得分 0

上面仁兄有源码否？？不深感激Top

4 楼GX_NET（小C）回复于 2003-09-10 01:27:38 得分 0

我看mｓｄｎ上系统发送trap 是用的SnmpExtensionTrap
请问自己可以吗Top

5 楼dinghui96（outstanding）回复于 2003-09-10 09:20:39 得分 0

楼上的人兄能否给个应用snmp trap建立连接，发送数据的例子。
小弟很急呀。Top

6 楼njtlxm（似是故人来）回复于 2003-09-10 09:34:58 得分 100

to dinghui96(ding) ：你好像连SNMP TRAP的基本常识都不知道，TRAP是UDP，要建立什么连接啊？

to GX_NET(什么都不懂) ：源码如下，请指点：

函数定义：BOOL SendSnmpUdp(CString m_szDstIP,CString m_szSrcIP,CStringArray& m_ValueList,int m_SpecialTrapID)

调用举例：
CStringArray AgentStart;
AgentStart.Add("IStart=start");
SendSnmpUdp(m_GServerIpAddr,m_GHostIP,AgentStart,50);

函数源码：
BOOL SendSnmpUdp(CString m_szDstIP,CString m_szSrcIP,CStringArray& m_ValueList,int m_SpecialTrapID)
{
int SectionNum = 4;
int nStatus;
int SectionLength = 0;
int VbLength = 0;
int offset = 0;
unsigned char SNMPTrapHeader[6] = { 0x30,0x3a };
unsigned char SNMPTrapVersion[3] = {0x02,0x01,0x00};
unsigned char SNMPTrapCommunity[8] = {0x04,0x06,0x70,0x75,0x62,0x6c,0x69,0x63 };
unsigned char SNMPType[6] = { 0xa4,0x2d } ;
unsigned char SNMPEnterprises[10] = {0x06,0x08,0x2b,0x06,0x01,0x04,0x01,0x81,0x9c,0x21 };
unsigned char SNMPAgentAddress[6] = {0x40,0x04,0x0a,0x02,0x01,0x67 };
unsigned char SNMPGenericID[3] = {0x02,0x01,0x06 };
unsigned char SNMPSpecificID[3] ={0x02,0x01,0x00 };
unsigned char SNMPTimeTicks[3] = {0x43,0x01,0x00};
unsigned char SNMPVBList[2] ={0x30,0x00 };
unsigned char SNMPVBListName[13] = {0x30,0x00,0x06,0x09,0x2b,0x06,0x01,0x04,0x01,0x81,0x9c,0x21,0x01 };
unsigned char SNMPVBListValue[255] ;
unsigned char SNMPTrapPDU[1200] ;
unsigned char SNMPTrapPDUTmp[1200] ;
SNMPSpecificID[2]=m_SpecialTrapID;
// BuildVbListBuf(m_ValueList,SNMPVBListName,12);
// m_szDstIP = "192.168.0.104";
if(CheckInWarnInfoList(m_ValueList,m_SpecialTrapID)!=1)
return TRUE;
int VbListLength = 0;
BuildVbListBuf(m_ValueList,SNMPVBListName,13,VbListLength);
memcpy(SNMPTrapPDUTmp,BuildVbListBuf(m_ValueList,SNMPVBListName,13,VbListLength),VbListLength);
//初始化socket
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 2, 0 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
return FALSE;
}
//拼装TRAPPDU
struct hostent *thisHost;
struct in_addr in;
char MyName[80];
char *ptr;
if(gethostname (MyName,80)==SOCKET_ERROR) {
WSACleanup();
return FALSE;
}
if(!(thisHost = gethostbyname(MyName))) {
WSACleanup();
return FALSE;
}
memset((void *)&in,sizeof(in),0);
in.s_addr=*((unsigned long *)thisHost->h_addr_list[0]);
if(!(ptr = inet_ntoa(in))) {
WSACleanup();
return FALSE;
}
CString szTmp,szIP;
if(m_szSrcIP.IsEmpty()){
szIP.Format("%s",ptr);
}else{
szIP = m_szSrcIP;
}
szTmp=szIP.Left(szIP.Find("."));
szIP= szIP.Mid(szIP.Find(".")+1);
SNMPAgentAddress[2] = (unsigned char) atoi(szTmp);
szTmp=szIP.Left(szIP.Find("."));
szIP= szIP.Mid(szIP.Find(".")+1);
SNMPAgentAddress[3] = (unsigned char) atoi(szTmp);
szTmp=szIP.Left(szIP.Find("."));
szIP= szIP.Mid(szIP.Find(".")+1);
SNMPAgentAddress[4] = (unsigned char) atoi(szTmp);
SNMPAgentAddress[5] = (unsigned char) atoi(szIP);
VbLength = 0;
VbLength = VbListLength;
int TrapHeadLen,CommandTrapLen;
if(VbLength+25<127){
SNMPType[1] = VbLength+25;
CommandTrapLen = 2;
}else if(VbLength+25<256){
SNMPType[1] = 0x81;
SNMPType[2] = VbLength+25;
SNMPType[3] = '\0';
CommandTrapLen = 3;
}else{// if(VbLength+24<512){
SNMPType[1] = 0x82;
SNMPType[2] = ((VbLength+25)&0xff00)>>8;
SNMPType[3] = ((VbLength+25)&0x00ff);
SNMPType[4] = '\0';
CommandTrapLen = 4;
}/*else{
SNMPType[1] = 0x83;
SNMPType[2] = (offset&0xff0000)>>16;
SNMPType[3] = (offset&0x00ff00)>>8;
SNMPType[4] = (offset&0x0000ff);
SNMPType[5] = '\0';
CommandTrapLen = 5;
}*/
int offset1 = 0;
offset1 = 13 - 2 + CommandTrapLen;
if(VbLength+ offset1+25<127){
SNMPTrapHeader[1] = VbLength+ 13+25;
SNMPTrapHeader[2] = '\0';
TrapHeadLen = 2;
}else if(VbLength+ offset1+25<256){
SNMPTrapHeader[1] = 0x81;
SNMPTrapHeader[2] = VbLength+offset1+25;
SNMPTrapHeader[3] = '\0';
TrapHeadLen = 3;
}else{// if(VbLength+offset1+24<512){
SNMPTrapHeader[1] = 0x82;
SNMPTrapHeader[2] = ((VbLength+offset1+25)&0xff00)>>8;
SNMPTrapHeader[3] = ((VbLength+offset1+25)&0x00ff);
SNMPTrapHeader[4] = '\0';
TrapHeadLen = 4;
}/*else{
SNMPTrapHeader[1] = 0x83;
SNMPTrapHeader[2] = ((VbLength+offset1+24)&0xff0000)>>16;
SNMPTrapHeader[3] = ((VbLength+offset1+24)&0x00ff00)>>8;
SNMPTrapHeader[4] = ((VbLength+offset1+24)&0x0000ff);
SNMPTrapHeader[5] = '\0';
TrapHeadLen = 5;
}*/
offset = 0;
memcpy(SNMPTrapPDU,SNMPTrapHeader,TrapHeadLen);
offset += TrapHeadLen;
memcpy(SNMPTrapPDU+offset,SNMPTrapVersion,3);
offset += 3;
memcpy(SNMPTrapPDU+offset,SNMPTrapCommunity,8);
offset += 8;
memcpy(SNMPTrapPDU+offset,SNMPType,CommandTrapLen);
offset += CommandTrapLen;
memcpy(SNMPTrapPDU+offset,SNMPEnterprises,10);
offset += 10;
memcpy(SNMPTrapPDU+offset,SNMPAgentAddress,6);
offset += 6;
memcpy(SNMPTrapPDU+offset,SNMPGenericID,3);
offset += 3;
memcpy(SNMPTrapPDU+offset,SNMPSpecificID,3);
offset += 3;
memcpy(SNMPTrapPDU+offset,SNMPTimeTicks,3);
offset += 3;
memcpy(SNMPTrapPDU+offset,SNMPTrapPDUTmp,VbLength);
offset += VbLength;
SNMPTrapPDU[offset+1]='\0';
//创建socket
SOCKADDR_IN addr_in;
SOCKADDR_IN addr_out;
SOCKET sock;
if ((sock=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP))==INVALID_SOCKET){
WSACleanup();
return FALSE;
}
u_short alport=IPPORT_RESERVED;
addr_in.sin_port =htons(alport);
addr_in.sin_family = AF_INET;
addr_in.sin_addr.s_addr = INADDR_ANY;
memset(&(addr_in.sin_zero),0, 8);
if (bind(sock,(LPSOCKADDR)&addr_in, sizeof(addr_in))==SOCKET_ERROR) {
WSACleanup();
return FALSE;
}
addr_out.sin_family = AF_INET;
addr_out.sin_port =htons(162);
if(m_szDstIP.IsEmpty()){
szIP.Format("%s",ptr);
}else{
szIP = m_szDstIP;
}
addr_out.sin_addr.s_addr= inet_addr(szIP);
memset(&(addr_out.sin_zero),0, 8);
sendto(sock,(char *) SNMPTrapPDU,offset,0,(struct sockaddr*)&addr_out,sizeof(addr_out));
closesocket(sock);
WSACleanup();
}

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7 楼njtlxm（似是故人来）回复于 2003-09-10 09:36:42 得分 0

unsigned char* BuildVbListBuf(CStringArray& m_ValueList,unsigned char* SNMPVBListName,int m_ListNameLength,int& m_VbLength)
{
int SectionLength,VbLength,offset;
int LenByteLen = 0;
unsigned char VbList[1000];
unsigned char m_szTmp[255];
unsigned char m_SectionTmp[255];
memset(VbList,0,sizeof(VbList));
SectionLength = 0;
VbLength = 0;
offset = 0;
for(int i=0;i<m_ValueList.GetSize();i++){
memset(m_szTmp,0,sizeof(m_szTmp));
memcpy(m_szTmp,m_ValueList.GetAt(i),m_ValueList.GetAt(i).GetLength());
SectionLength = m_ValueList.GetAt(i).GetLength();
if(SectionLength<127){
memmove(m_szTmp+2,m_szTmp,SectionLength);
m_szTmp[0] = 0x04;
m_szTmp[1] = SectionLength;
SectionLength += 2;
}else{
memmove(m_szTmp+3,m_szTmp,SectionLength);
m_szTmp[0] = 0x04;
m_szTmp[1] = 0x81;
m_szTmp[2] = SectionLength;
SectionLength += 3;
}
memset(m_SectionTmp,0,sizeof(m_SectionTmp));
if(SectionLength + m_ListNameLength <127){
m_SectionTmp[0] = 0x30;
m_SectionTmp[1] = SectionLength + m_ListNameLength -2;
memcpy(m_SectionTmp+2,SNMPVBListName+2,m_ListNameLength-2);
memcpy(m_SectionTmp+2+m_ListNameLength-2,m_szTmp,SectionLength);
SectionLength += m_ListNameLength+2 -2;
}else{
memmove(m_szTmp+3,m_szTmp,SectionLength);
m_szTmp[0] = 0x30;
m_szTmp[1] = 0x81;
m_szTmp[2] = SectionLength+ m_ListNameLength -2;
memcpy(m_SectionTmp+3,SNMPVBListName+2,m_ListNameLength-2);
memcpy(m_SectionTmp+3+m_ListNameLength-2,m_szTmp,SectionLength);
SectionLength += m_ListNameLength + 3 -2;
}
memcpy(VbList+offset,m_SectionTmp,SectionLength);
offset += SectionLength;
}
m_VbLength = offset;
if(offset<127){
memmove(VbList+2,VbList,offset);
VbList[0] = 0x30;
VbList[1] = offset;
m_VbLength += 2;
}else if(offset<256){
memmove(VbList+3,VbList,offset);
VbList[0] = 0x30;
VbList[1] = 0x81;
VbList[2] = offset;
m_VbLength += 3;
}else {
memmove(VbList+4,VbList,offset);
VbList[0] = 0x30;
VbList[1] = 0x82;
VbList[2] = (offset&0xff00)>>8;
VbList[3] = (offset&0x00ff);
m_VbLength += 4;
}/*else{
memcpy(VbList+5,VbList,offset);
VbList[0] = 0x30;
VbList[1] = 0x83;
VbList[2] = (offset&0xff0000)>>16;
VbList[3] = (offset&0x00ff00)>>8;
VbList[4] = (offset&0x0000ff);
m_VbLength += 5;
}*/
return VbList;
}
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8 楼dinghui96（outstanding）回复于 2003-09-10 10:05:41 得分 0

njtlxm(njtlxm)
惭愧，惭愧，以前只是做过sock的通信，对snmp从来没研究过，请多指教。Top

9 楼njtlxm（似是故人来）回复于 2003-09-10 11:29:33 得分 0

所有的网络通信，到最后都是变成一个BUFFER，里面放着一堆的数据。
只要你了解协议，完全可以自己编码完成任何的网络数据包的封装。Top

10 楼dinghui96（outstanding）回复于 2003-09-10 21:12:18 得分 0

但是我现在已经没有时间去了解协议啦。只好先找个例子修改一下。Top

11 楼GX_NET（小C）回复于 2003-09-11 03:30:00 得分 0

非常感谢njtlxm(njtlxm)
我现在计不得密码了，我登陆都是系统自动登陆的，不知道怎么能得到自己的密码
一旦找到密码，马上给分 100Top

12 楼GX_NET（小C）回复于 2003-09-11 03:39:57 得分 0

非常感谢，好了！
不知这位大哥何处工作？Top

13 楼njtlxm（似是故人来）回复于 2003-09-11 11:52:01 得分 0

在一家事业单位上班，呵呵。
有事用CSDN的短消息与我联系Top

14 楼GX_NET（小C）回复于 2004-02-05 13:49:14 得分 0

to njtlxm 怎么联系你呀
这段代码有一些疑惑，有的接收器收不到
说 asn length too longTop

15 楼GX_NET（小C）回复于 2004-02-05 13:53:24 得分 0

能把trap 包的格式说明给我一份码
我给你发了短信了，不知道看到没有Top