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packetstore.cc
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packetstore.cc
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/*
* PXE daemon - enable the remote booting of PXE enabled machines.
* Copyright (C) 2000 Tim Hurman ([email protected])
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
/******************************************************************************
* packetstore.cc - decode and store a packet in memory *
******************************************************************************/
#include "packetstore.h"
/* some global variables */
const char *DHCP_types[DHCP_MAX_TYPES] =
{
"INVALID", "DHCPDISCOVER", "DHCPOFFER", "DHCPREQUEST",
"DHCPDECLINE", "DHCPACK", "DHCPNACK", "DHCPRELEASE",
"DHCPINFORM"
};
/******************************************************************************
* PacketStore - null packet constructor *
******************************************************************************/
PacketStore::PacketStore(LogFile *_logger)
{
this->logger = _logger;
head = head43 = NULL;
Initalise();
}
/******************************************************************************
* PacketStore - full packet analyse *
******************************************************************************/
PacketStore::PacketStore(LogFile *_logger, struct sockaddr_in *_address,
uint8_t *bootp_pkt, int bootp_pkt_len)
{
this->logger = _logger;
memcpy(&(this->address), _address, sizeof(this->address));
ReadPacket(bootp_pkt, bootp_pkt_len);
}
/******************************************************************************
* ~PacketStore - descructor *
******************************************************************************/
PacketStore::~PacketStore()
{
Initalise();
}
/******************************************************************************
* Initalise - init/blank a packet *
******************************************************************************/
void
PacketStore::Initalise(void)
{
option *optptr, *optnext;
// basic stuff
op=htype=hlen=hops=0;
secs=0;
xid=0;
memset(chaddr, 0, 16);
sname[0] = file[0] = 0;
magic_cookie = 0;
memset(&ciaddr, 0, sizeof(ciaddr));
memset(&yiaddr, 0, sizeof(yiaddr));
memset(&siaddr, 0, sizeof(siaddr));
memset(&giaddr, 0, sizeof(giaddr));
memset(&address, 0, sizeof(giaddr));
// options
for(optptr=head; optptr != NULL; optptr=optnext)
{
optnext = optptr->next;
delete[] optptr->data;
delete optptr;
}
head = NULL;
// options 43
for(optptr=head43; optptr != NULL; optptr=optnext)
{
optnext = optptr->next;
delete[] optptr->data;
delete optptr;
}
head43 = NULL;
}
/******************************************************************************
* ReadPacket - read a bootp packet *
******************************************************************************/
int
PacketStore::ReadPacket(uint8_t *bootp_pkt, int bootp_pkt_len)
{
if(bootp_pkt_len < 300)
throw new SysException(0, "PacketStore::ReadPacket",
"Invalid packet length");
op = bootp_pkt[0];
htype = bootp_pkt[1];
hlen = bootp_pkt[2];
hops = bootp_pkt[3];
// xid - store in network byte order
xid = bootp_pkt[4];
xid <<= 8;
xid |= bootp_pkt[5];
xid <<= 8;
xid |= bootp_pkt[6];
xid <<= 8;
xid |= bootp_pkt[7];
xid = htonl(xid);
// no of secs
secs = bootp_pkt[8];
secs <<= 8;
secs |= bootp_pkt[9];
secs = htons(secs);
// client IP addr (filled in by client)
ciaddr.s_addr = bootp_pkt[12];
ciaddr.s_addr <<= 8;
ciaddr.s_addr |= bootp_pkt[13];
ciaddr.s_addr <<= 8;
ciaddr.s_addr |= bootp_pkt[14];
ciaddr.s_addr <<= 8;
ciaddr.s_addr |= bootp_pkt[15];
ciaddr.s_addr = htonl(ciaddr.s_addr);
// client IP addr (filled in by server)
yiaddr.s_addr = bootp_pkt[16];
yiaddr.s_addr <<= 8;
yiaddr.s_addr |= bootp_pkt[17];
yiaddr.s_addr <<= 8;
yiaddr.s_addr |= bootp_pkt[18];
yiaddr.s_addr <<= 8;
yiaddr.s_addr |= bootp_pkt[19];
yiaddr.s_addr = htonl(yiaddr.s_addr);
// server IP address (filled in by server)
siaddr.s_addr = bootp_pkt[20];
siaddr.s_addr <<= 8;
siaddr.s_addr |= bootp_pkt[21];
siaddr.s_addr <<= 8;
siaddr.s_addr |= bootp_pkt[22];
siaddr.s_addr <<= 8;
siaddr.s_addr |= bootp_pkt[23];
siaddr.s_addr = htonl(siaddr.s_addr);
// gateway IP address
giaddr.s_addr = bootp_pkt[24];
giaddr.s_addr <<= 8;
giaddr.s_addr |= bootp_pkt[25];
giaddr.s_addr <<= 8;
giaddr.s_addr |= bootp_pkt[26];
giaddr.s_addr <<= 8;
giaddr.s_addr |= bootp_pkt[27];
giaddr.s_addr = htonl(giaddr.s_addr);
// client hardware address
memcpy(chaddr, bootp_pkt+28, 16);
// the servername
if(bootp_pkt[107] != 0)
throw new SysException(0, "PacketStore::ReadPacket",
"Invalid servername");
strcpy(sname, (char*)bootp_pkt+44);
// the file
if(bootp_pkt[235] != 0)
throw new SysException(0, "PacketStore::ReadPacket",
"Invalid filename");
strcpy(file, (char*)bootp_pkt+108);
// the magic cookie
magic_cookie = bootp_pkt[236];
magic_cookie <<= 8;
magic_cookie |= bootp_pkt[237];
magic_cookie <<= 8;
magic_cookie |= bootp_pkt[238];
magic_cookie <<= 8;
magic_cookie |= bootp_pkt[239];
magic_cookie = htonl(magic_cookie);
if(bootp_pkt[236] == 0xff)
return(0);
// read the options
head=head43=NULL;
return(ReadOptions(bootp_pkt+240, bootp_pkt_len-240));
}
/******************************************************************************
* print the packet to stdout *
******************************************************************************/
std::ostream&
operator<< (std::ostream& os, PacketStore &pkt)
{
int i;
option *optptr;
// basic info
os << "BOOTP type : " << (int)pkt.op << "\n";
os << "Hardware type : " << (int)pkt.htype << "\n";
os << "Hardware Length : " << (int)pkt.hlen << "\n";
os << "Hops : " << (int)pkt.hops << "\n";
os << "Transaction ID : 0x" << std::hex << ntohl(pkt.xid) <<
std::dec <<"\n";
os << "Seconds : " << ntohs(pkt.secs) << "\n";
os << "Client IP (From Client): " << inet_ntoa(pkt.ciaddr) << "\n";
os << "Client IP (From Server): " << inet_ntoa(pkt.yiaddr) << "\n";
os << "Server IP : " << inet_ntoa(pkt.siaddr) << "\n";
os << "Gateway IP : " << inet_ntoa(pkt.giaddr) << "\n";
os << "Client Hardware address: " ;
// client hardware addr
for(i=0; i<pkt.hlen; i++)
os << std::hex << (int)pkt.chaddr[i] << std::dec << ".";
os << "\n";
// string info
os << "Server name : " << pkt.sname << "\n";
os << "Boot filename : " << pkt.file << "\n";
os << "Magic cookie : 0x" << std::hex <<
ntohl(pkt.magic_cookie) << std::dec << "\n";
if(pkt.head == NULL)
return os;
// print the options
os << "Options :\n";
for(optptr = pkt.head; optptr != NULL; optptr = optptr->next)
{
os << "Option major:" << (int)optptr->major_no
<< " minor: " << (int)optptr->minor_no
<< ", Length: " << (int)optptr->len << ", Data: ";
for(i=0; i<optptr->len; i++)
if((optptr->data[i] >0x20) && (optptr->data[i] < 0x7f))
os << "[" << (int)optptr->data[i]
<< "," << std::hex << (int)optptr->data[i] << std::dec
<< "," << (char)optptr->data[i] << "] ";
else
os << "[" << (int)optptr->data[i]
<< "," << std::hex << (int)optptr->data[i] << std::dec
<< ", ] ";
os << "\n";
}
if(pkt.head43 == NULL)
return os;
// option 43
os << "Options (sub-packed) :\n";
for(optptr = pkt.head43; optptr != NULL; optptr = optptr->next)
{
os << "Option [43] " << (int)optptr->major_no
<< " minor: " << (int)optptr->minor_no
<< ", Length: " << (int)optptr->len << ", Data: ";
for(i=0; i<optptr->len; i++)
if((optptr->data[i] >0x20) && (optptr->data[i] < 0x7f))
os << "[" << (int)optptr->data[i]
<< "," << std::hex << (int)optptr->data[i] << std::dec
<< "," << (char)optptr->data[i] << "] ";
else
os << "[" << (int)optptr->data[i]
<< "," << std::hex << (int)optptr->data[i] << std::dec
<< ", ] ";
os << "\n";
}
return os;
}
/******************************************************************************
* ReadOptions - read all the options contained within a packet *
******************************************************************************/
int
PacketStore::ReadOptions(uint8_t *bootp_pkt, int bootp_pkt_len)
{
// everything will always be null here
int pos;
option *optptr = NULL;
option *optprev = NULL;
for(pos=0; pos < bootp_pkt_len; pos++)
{
if(bootp_pkt[pos] == 0)
goto ReadOptions_next; // pad
if(bootp_pkt[pos] == 255)
break; // end options
// lots of sub options
if(bootp_pkt[pos] == 43)
{
ReadOptions43(bootp_pkt+pos+2, bootp_pkt[pos+1]);
pos += bootp_pkt[pos+1]+1;
goto ReadOptions_next; // next
}
// default
optptr = new option;
optptr->major_no = bootp_pkt[pos++];
optptr->minor_no = 0;
optptr->len = bootp_pkt[pos++];
optptr->data = new uint8_t[optptr->len];
optptr->next = NULL;
memcpy(optptr->data, bootp_pkt+pos, optptr->len);
// increment pos, accounting to cyclic increment
pos += (optptr->len-1);
if(head != NULL)
{
optprev->next = optptr; // assign
optprev = optprev->next; // advance
}
else
optprev = head = optptr;
ReadOptions_next:
pos=pos;
}
return(0);
}
/******************************************************************************
* ReadOptions43 - read all the options contained within a packet *
******************************************************************************/
int
PacketStore::ReadOptions43(uint8_t *bootp_pkt, int bootp_pkt_len)
{
// everything will always be null here
int pos;
option *optptr=NULL;
option *optprev=NULL;
for(pos=0; pos < bootp_pkt_len; pos++)
{
if(bootp_pkt[pos] == 0)
goto ReadOptions43_next; // pad
if(bootp_pkt[pos] == 255)
break; // end options
// lots of sub options
if(bootp_pkt[pos] == 43)
{
std::cerr << "Option 43 detected\n";
break;
}
// default
optptr = new option;
optptr->major_no = 43;
optptr->minor_no = bootp_pkt[pos++];
optptr->len = bootp_pkt[pos++];
optptr->data = new uint8_t[optptr->len];
optptr->next = NULL;
memcpy(optptr->data, bootp_pkt+pos, optptr->len);
// increment pos, accounting to cyclic increment
pos += (optptr->len-1);
if(head43 != NULL)
{
optprev->next = optptr; // assign
optprev = optprev->next; // advance
}
else
optprev = head43 = optptr;
ReadOptions43_next:
pos=pos;
}
return(0);
}
/******************************************************************************
* operator() - get an option from the list *
******************************************************************************/
option *
PacketStore::operator()(int major_opt=0, int minor_opt=0)
{
return(GetOption(major_opt, minor_opt));
}
/******************************************************************************
* GetOption - get an option fromthe option list *
******************************************************************************/
option *
PacketStore::GetOption(int major_opt=0, int minor_opt=0)
{
option *opt = new option;
option *optptr;
if(major_opt == 43)
optptr = head43;
else
optptr = head;
for(; optptr != NULL; optptr = optptr->next)
if((major_opt == optptr->major_no) &&
(minor_opt == optptr->minor_no))
break;
if(optptr == NULL)
return(NULL);
opt->major_no = optptr->major_no;
opt->minor_no = optptr->minor_no;
opt->len = optptr->len;
opt->next = NULL;
opt->data = new uint8_t[opt->len];
memcpy(opt->data, optptr->data, opt->len);
return(opt);
}
/******************************************************************************
* DelOption - delete an option from the list *
******************************************************************************/
int
PacketStore::DelOption(int major_opt=0, int minor_opt=0)
{
option *optptr, *optprev;
if(major_opt == 43)
optptr = optprev = head43;
else
optptr = optprev = head;
for(; ((major_opt != optptr->major_no) &&
(minor_opt != optptr->minor_no)) ||
(optptr != NULL); optptr = optptr->next)
optprev = optptr;
if(optptr != NULL) // option found
{
// re-arrange the pointers
if(optprev == optptr) // head
if(optptr == head43)
head43 = optptr->next;
else
head = optptr->next;
else
optprev->next = optptr->next;
// delete the memory
delete[] optptr->data;
delete optptr;
}
else
return(1); // no found
return(0);
}
/******************************************************************************
* AddOption - add an option to the list (overwrite) *
******************************************************************************/
int
PacketStore::AddOption(const option *opt)
{
option *optptr, *optprev;
if(opt->major_no == 43)
optptr = optprev = head43;
else
optptr = optprev = head;
// find the entry or null;
while(optptr != NULL)
{
if((opt->major_no != optptr->major_no) &&
(opt->minor_no != optptr->minor_no))
break;
optprev = optptr;
optptr = optptr->next;
}
if(optptr == NULL) // new item
{
optptr = new option;
optptr->major_no = opt->major_no;
optptr->minor_no = opt->minor_no;
optptr->next = NULL;
if((43 == opt->major_no) && (NULL == head43))
head43 = optptr;
else if(NULL == head)
head = optptr;
else
optprev->next = optptr;
}
else // old item
{
delete[] optptr->data;
}
optptr->len = opt->len;
optptr->data = new uint8_t[optptr->len];
memcpy(optptr->data, opt->data, opt->len);
return(0);
}
/******************************************************************************
* htois - host to intel order (short) *
******************************************************************************/
uint16_t
PacketStore::htois(uint16_t value)
{
uint8_t t1, t2;
uint16_t val;
// convert to a standard
val = htons(value);
// check if we need to go any further
// since Intel order != network order
if(val != value)
return(value);
// we now have a standard, can you read this Intel?, this is
// STANDARD!
// we know that Intel ordering is the opposite to network byte ordering
// so just swap bytes all the way through
// out
t1 = (val & 0x00ff);
t2 = (val & 0xff00) >> 8;
// in
val = (t1<<8);
val |= t2;
// we are now in a non-standard
return val;
}
/******************************************************************************
* htoil - host to intel order (long) *
******************************************************************************/
uint32_t
PacketStore::htoil(uint32_t value)
{
uint8_t t1, t2, t3, t4;
uint32_t val;
// convert to a standard
val = htonl(value);
// check if we need to go any further
// since Intel order != network order
if(val != value)
return(value);
// we now have a standard, can you read this Intel?, this is
// STANDARD!
// we know that Intel ordering is the opposite to network byte ordering
// so just swap bytes all the way through
// out
t1 = (val & 0x000000ff);
t2 = (val & 0x0000ff00) >> 8;
t3 = (val & 0x00ff0000) >> 16;
t4 = (val & 0xff000000) >> 24;
// in
val = (t1<<24);
val |= (t2<<16);
val |= (t3<<8);
val |= (t4);
return(val);
}
/******************************************************************************
* SetAddress - set the address fiel of the packet (from/to) *
******************************************************************************/
void
PacketStore::SetAddress(const struct sockaddr_in *_address)
{
memcpy(&address, _address, sizeof(address));
}
/******************************************************************************
* MakeReply - generate a reply to an incoming request *
******************************************************************************/
int
PacketStore::MakeReply(PacketStore &request, Options *config,
struct sockaddr_in *server_addr)
{
// local vars
option *opt = NULL;
option *req_list = NULL;
int pkttype = 0;
uint16_t reqCSA;
// first, check for a valid bootp packet
if(BOOTREQUEST != request.op)
{
logger->Event(LEVEL_INFO, "MakeReply", 1,
"Packet is not a bootp request");
return(-1);
}
// valid client system arch?
reqCSA = request.GetCSA();
if((uint16_t)-1 == reqCSA)
{
logger->Event(LEVEL_INFO, "MakeReply", 1,
"packet contains an unknown client system architecture");
return(-1);
}
// see if there are any menus for this packet
if((uint16_t)-1 == config->CheckMenu(reqCSA))
return(-1);
// next, check what the packet type was
opt = request(43,71);
if(opt == NULL)
{
logger->Event(LEVEL_INFO, "MakeReply", 1,
"Received proxy DHCP packet");
pkttype = 1;
}
else
{
delete[] opt->data;
delete opt;
logger->Event(LEVEL_INFO, "MakeReply", 1,
"Received PXE request packet");
pkttype = 2;
}
// was it a valid request packet?
opt = request(53);
if((NULL == opt) || (DHCPREQUEST != opt->data[0]))
{
logger->Event(LEVEL_INFO, "MakeReply", 1,
"Packet does not contain a valid DHCP message type");
return(-1);
}
opt->data[0] = DHCPACK;
opt->len = 1;
AddOption(opt);
delete[] opt->data;
delete opt;
// is the param request list ok?
req_list = request(55);
if(NULL == req_list)
{
logger->Event(LEVEL_INFO, "MakeReply", 1,
"No parameter request list found");
return(-1);
}
// good packet ok, build reply
memset(file, 0, 128);
memset(sname, 0, 64);
// copy over the basic info
op = BOOTREPLY;
htype = request.htype;
hlen = request.hlen;
hops = request.hops;
xid = request.xid;
secs = request.secs;
magic_cookie = htonl(MAGIC_COOKIE);
// slightly harder
memcpy(chaddr, request.chaddr, 16);
memset(&ciaddr, 0, sizeof(ciaddr));
memset(&yiaddr, 0, sizeof(yiaddr));
memcpy(&siaddr, &(server_addr->sin_addr), sizeof(siaddr));
memset(&giaddr, 0, sizeof(yiaddr));
// set the destination address
memcpy(&address, &(request.address), sizeof(address));
// good, now go through the option list
for(int i=0; i < req_list->len; i++)
switch(req_list->data[i])
{
case 43:
if(-1 == GenOpt43(config, reqCSA, request, pkttype))
return(-1);
break;
case 54:
GenOpt54();
break;
case 60:
GenOpt60();
break;
}
return(0);
}
/******************************************************************************
* GenOpt43 - generate reply options *
******************************************************************************/
int
PacketStore::GenOpt43(Options *config, int reqCSA, PacketStore &request,
int pkttype)
{
option opt, *optptr;
struct sockaddr_in t_addr;
char *tmpc;
int arch_id, menu_id;
uint8_t req_layer;
int tmpi;
opt.major_no = 43;
// Proxy DHCP packet
if(1 == pkttype)
{
// minor 1
opt.minor_no = 1;
t_addr.sin_addr.s_addr = htonl(config->GetMTFTPAddr());
opt.len = sizeof(t_addr.sin_addr.s_addr);
opt.data = new uint8_t[opt.len];
memcpy(opt.data, &(t_addr.sin_addr.s_addr), opt.len);
AddOption(&opt);
delete [] opt.data;
// minor 2 - n.b. Intel byte ordering - do intel have no common sense?
opt.minor_no = 2;
t_addr.sin_port = htois(config->GetMTFTPcport());
opt.len = sizeof(t_addr.sin_port);
opt.data = new uint8_t[opt.len];
memcpy(opt.data, &(t_addr.sin_port), opt.len);
AddOption(&opt);
delete [] opt.data;
// minor 3 - again Intel's bel^Wbig endian
opt.minor_no = 3;
t_addr.sin_port = htois(config->GetMTFTPsport());
opt.len = sizeof(t_addr.sin_port);
opt.data = new uint8_t[opt.len];
memcpy(opt.data, &(t_addr.sin_port), opt.len);
AddOption(&opt);
delete [] opt.data;
// minor 4
opt.minor_no = 4;
opt.len = 1;
opt.data = new uint8_t[opt.len];
opt.data[0] = MTFTP_OPEN_TIMEOUT;
AddOption(&opt);
// minor 5
opt.minor_no = 5;
opt.data[0] = MTFTP_REOPEN_TIMEOUT;
AddOption(&opt);
// minor 6
opt.minor_no = 6;
opt.data[0] = 0;
// check for disabled broad/multicast
if(0 == config->UseMulticast())
opt.data[0] |= DISABLE_MULTICAST;
if(0 == config->UseBroadcast())
opt.data[0] |= DISABLE_BROADCAST;
AddOption(&opt);
delete [] opt.data;
// minor 7
opt.minor_no = 7;
t_addr.sin_addr.s_addr = htonl(config->GetMulticast());
opt.len = sizeof(t_addr.sin_addr.s_addr);
opt.data = new uint8_t[opt.len];
memcpy(opt.data, &(t_addr.sin_addr.s_addr), opt.len);
AddOption(&opt);
delete [] opt.data;
// minor 9 - will always be ok, as we checked the menus earlier
optptr = config->MakeBootMenu(reqCSA, &arch_id, &menu_id);
optptr->major_no = 43;
optptr->minor_no = 9;
AddOption(optptr);
delete [] optptr->data;
delete optptr;
// minor 10 - the menu
opt.minor_no = 10;
tmpc = config->GetMenuPrompt();
opt.len = strlen(tmpc)+1;
opt.data = new uint8_t[opt.len];
opt.data[0] = config->GetMenuTimeout();
memcpy(opt.data+1, tmpc, opt.len-1);
AddOption(&opt);
delete [] opt.data;
delete [] tmpc;
// minor 71
opt.minor_no = 71;
opt.len = 4;
opt.data = new uint8_t[4];
tmpi = htons(PXE_SERVER_TYPE);
memcpy(opt.data, &tmpi, 2);
opt.data[2] = 0;
req_layer = opt.data[3] = config->GetMinLayer(arch_id, menu_id);
AddOption(&opt);
delete [] opt.data;
}
else
// PXE layer request
{
arch_id = reqCSA;
// get option 71 fromthe request packet
optptr = request(43, 71);
menu_id = optptr->data[0];
menu_id <<= 8;
menu_id |= optptr->data[1];
// don't worry about the third byte, it is for 'credentials'
req_layer = optptr->data[3];
// make the reply option
opt.minor_no = 71;
opt.len = 4;
opt.data = new uint8_t[opt.len];
memcpy(opt.data, optptr->data, 2);
opt.data[2] = 0;
delete [] optptr->data;
delete optptr;
// which layer to get next/any
if(config->CheckLayer(menu_id, arch_id, req_layer) == 0)
{
opt.data[3] = req_layer;
}
else
{
delete [] opt.data;
return(-1);
}
AddOption(&opt);
delete [] opt.data;
}
// make filename
tmpc = config->MakeFilename(menu_id, arch_id, req_layer);
if(strlen(tmpc) > 127) // gotta think of a better way
tmpi = 127;
else
tmpi = strlen(tmpc);
memcpy(file, tmpc, tmpi);
file[tmpi] = 0;
delete [] tmpc;
// cool, send the reply
return(0);
}
/******************************************************************************
* GenOpt54 - generate reply options *
******************************************************************************/
int
PacketStore::GenOpt54(void)
{
option opt;
opt.len = sizeof(siaddr.s_addr);
opt.major_no = 54;
opt.minor_no = 0;
opt.data = new uint8_t[opt.len];
memcpy(opt.data, &(siaddr.s_addr), opt.len);
AddOption(&opt);
delete [] opt.data;
return(0);
}
/******************************************************************************
* GenOpt60 - generate reply options *
******************************************************************************/
int
PacketStore::GenOpt60(void)
{
option opt;
opt.major_no=60;
opt.minor_no=0;
opt.len = strlen(DHCP_T60);
opt.data = new uint8_t[opt.len];
memcpy(opt.data, DHCP_T60, opt.len);
AddOption(&opt);
delete [] opt.data;
return(0);
}
/******************************************************************************
* GetCSA - get the Client System Archetecture of the packet *
******************************************************************************/
uint16_t
PacketStore::GetCSA(void)
{
uint16_t csa1, csa2;
option *opt;
char csac[6];
int csa1_nok=0;
int csa2_nok=0;
// should have received two copies of the csa, compare
csa1 = csa2 = 0;
// the binary packed copy
opt = GetOption(93);
if(NULL == opt)
csa1_nok = 1;
else
{
memcpy(&csa1, opt->data, 2);
csa1 = ntohs(csa1);
delete [] opt->data;
delete opt;
}
// get the ascii packed version
opt = GetOption(60);
if(NULL == opt)
csa2_nok = 1;
else if(32 != opt->len) {
csa2_nok = 1;
delete [] opt->data;
delete opt;
} else {
memcpy(csac, opt->data+15, 5);
csac[5] = 0;
csa2 = atoi(csac);
delete [] opt->data;
delete opt;
}
// check details
if((0 == csa1_nok) && (0 == csa2_nok ) && (csa1 == csa2))
return(checkCSA(csa1));
else if ((1 == csa1_nok) && (0 == csa2_nok ))
return(checkCSA(csa2));
else if ((0 == csa1_nok) && (1 == csa2_nok ))
return(checkCSA(csa1));
return((uint16_t)-1);
}
/******************************************************************************
* checkCSA - see if we are supporting the type of arch *
******************************************************************************/
uint16_t
PacketStore::checkCSA(uint16_t reqCSA)
{
int i;
for(i=0; (uint16_t)-1 != CSA_types[i].arch_id; i++)
if(CSA_types[i].arch_id == reqCSA)