isakmpsa_switch_authmethod
authmethod = isakmpsa_switch_authmethod(sa->authmethod);
isakmpsa_switch_authmethod(proposal->authmethod), isakmpsa_switch_authmethod(p->authmethod));
if (isakmpsa_switch_authmethod(proposal->authmethod) != isakmpsa_switch_authmethod(p->authmethod) ||
extern int isakmpsa_switch_authmethod(int authmethod);