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ipsecAssociationDatabaseGetSpi

CAPL Functions » TCP/IP API » ipsecAssociationDatabaseGetSpi Valid for: CANoe DE • CANoe4SW DE

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Note

  • The function is dependent on the selected stack.
  • It is not possible to modify the security association database of the operating system TCP/IP stack.

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Function Syntax

long ipsecAssociationDatabaseGetSpi(IP_Endpoint source, IP_Endpoint destination, char[] protocol, char[] mode);

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Description

With this function, it is possible to create a security association in the security association database of the current network stack. The stack will assign a free SPI to the security association. After the creation, it is possible to modify the security association record with ipsecAssociationSetParameter and update the security association in the database by calling ipsecAssociationDatabaseUpdate.

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Parameters

  • source: Source endpoint of the security association.
  • destination: Destination endpoint of the security association.
  • protocol: The Ipsec protocol of the security association. The following values are possible:
    • UNSPEC: 0
    • ESP: 1
    • AH: 2
  • mode: The IPsec mode of the security association. The following values are possible:
    • ANY: 0
    • TRANSPORT: 1
    • TUNNEL: 2

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Return Values

  • >0: A valid security association record handle.
  • -1: Failed

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Example

on start
{
  dword socket;
  long association;
  dword addressCount;
  ip_Address adapterAddress[1];
  ip_Endpoint localEndpoint;

  // add a policy
  IpSecPolicyDatabaseAdd(ip_Endpoint(0.0.0.0:0), 0, ip_Endpoint(192.168.1.10:0), 24, "any", "out ipsec ah/transport//require");

  // create a security association in the database from the current node to the node 192.168.1.10
  ipGetAdapterAddress(1, adapterAddress, addressCount);
  localEndpoint.Address = adapterAddress[0];
  association = ipsecAssociationDatabaseGetSpi(localEndpoint, ip_Endpoint(192.168.1.10), "ah", "any");

  // set the ah algorithm and key
  ipsecAssociationSetParameter(association, "ahalgorithm", "sha");
  ipsecAssociationSetParameter(association, "ahkey", "0123456789ABCDEF");

  // update the security association in the database
  ipsecAssociationDatabaseUpdate(association);

  // release the association object when it isn't needed anymore
  ipsecAssociationRelease(association);

  // send data which matches the policy
  socket = udpOpen(ip_Endpoint(0.0.0.0:0));
  udpSendTo(socket, ip_Endpoint(192.168.1.10:23), "hello world", 11);
}