static Reload CheckNewPromises(GenericAgentConfig *config, const Policy *existing_policy)
{
if (GenericAgentIsPolicyReloadNeeded(config, existing_policy))
{
Log(LOG_LEVEL_VERBOSE, "New promises detected...");
if (GenericAgentCheckPromises(config))
{
return RELOAD_FULL;
}
else
{
Log(LOG_LEVEL_INFO, "New promises file contains syntax errors -- ignoring");
}
}
else
{
Log(LOG_LEVEL_DEBUG, "No new promises found");
}
return RELOAD_ENVIRONMENT;
}
bool GenericAgentCheckPolicy(GenericAgentConfig *config, bool force_validation)
{
if (!MissingInputFile(config->input_file))
{
if (IsPolicyPrecheckNeeded(config, force_validation))
{
bool policy_check_ok = GenericAgentCheckPromises(config);
if (config->agent_specific.agent.bootstrap_policy_server && !policy_check_ok)
{
Log(LOG_LEVEL_VERBOSE, "Policy is not valid, but proceeding with bootstrap");
return true;
}
return policy_check_ok;
}
else
{
Log(LOG_LEVEL_VERBOSE, "Policy is already validated");
return true;
}
}
return false;
}
int OpenReceiverChannel(void)
{
struct addrinfo *response, *ap;
struct addrinfo query = {
.ai_flags = AI_PASSIVE,
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_STREAM
};
/* Listen to INADDR(6)_ANY if BINDINTERFACE unset. */
char *ptr = NULL;
if (BINDINTERFACE[0] != '\0')
{
ptr = BINDINTERFACE;
}
/* Resolve listening interface. */
if (getaddrinfo(ptr, STR_CFENGINEPORT, &query, &response) != 0)
{
Log(LOG_LEVEL_ERR, "DNS/service lookup failure. (getaddrinfo: %s)", GetErrorStr());
return -1;
}
int sd = -1;
for (ap = response; ap != NULL; ap = ap->ai_next)
{
if ((sd = socket(ap->ai_family, ap->ai_socktype, ap->ai_protocol)) == -1)
{
continue;
}
int yes = 1;
if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR,
&yes, sizeof(yes)) == -1)
{
Log(LOG_LEVEL_ERR, "Socket option SO_REUSEADDR was not accepted. (setsockopt: %s)", GetErrorStr());
exit(1);
}
struct linger cflinger = {
.l_onoff = 1,
.l_linger = 60
};
if (setsockopt(sd, SOL_SOCKET, SO_LINGER,
&cflinger, sizeof(cflinger)) == -1)
{
Log(LOG_LEVEL_ERR, "Socket option SO_LINGER was not accepted. (setsockopt: %s)", GetErrorStr());
exit(1);
}
if (bind(sd, ap->ai_addr, ap->ai_addrlen) != -1)
{
if (LogGetGlobalLevel() >= LOG_LEVEL_DEBUG)
{
/* Convert IP address to string, no DNS lookup performed. */
char txtaddr[CF_MAX_IP_LEN] = "";
getnameinfo(ap->ai_addr, ap->ai_addrlen,
txtaddr, sizeof(txtaddr),
NULL, 0, NI_NUMERICHOST);
Log(LOG_LEVEL_DEBUG, "Bound to address '%s' on '%s' = %d", txtaddr,
CLASSTEXT[VSYSTEMHARDCLASS], VSYSTEMHARDCLASS);
}
break;
}
else
{
Log(LOG_LEVEL_ERR, "Could not bind server address. (bind: %s)", GetErrorStr());
cf_closesocket(sd);
}
}
if (sd < 0)
{
Log(LOG_LEVEL_ERR, "Couldn't open/bind a socket");
exit(1);
}
freeaddrinfo(response);
return sd;
}
/*********************************************************************/
/* Level 3 */
/*********************************************************************/
void CheckFileChanges(EvalContext *ctx, Policy **policy, GenericAgentConfig *config)
{
Log(LOG_LEVEL_DEBUG, "Checking file updates for input file '%s'", config->input_file);
if (GenericAgentIsPolicyReloadNeeded(config, *policy))
{
Log(LOG_LEVEL_VERBOSE, "New promises detected...");
if (GenericAgentCheckPromises(config))
{
Log(LOG_LEVEL_INFO, "Rereading policy file '%s'", config->input_file);
/* Free & reload -- lock this to avoid access errors during reload */
EvalContextClear(ctx);
DeleteItemList(IPADDRESSES);
IPADDRESSES = NULL;
free(SV.allowciphers);
SV.allowciphers = NULL;
DeleteItemList(SV.trustkeylist);
DeleteItemList(SV.skipverify);
DeleteItemList(SV.attackerlist);
DeleteItemList(SV.nonattackerlist);
DeleteItemList(SV.multiconnlist);
DeleteAuthList(SV.admit);
DeleteAuthList(SV.deny);
DeleteAuthList(SV.varadmit);
DeleteAuthList(SV.vardeny);
DeleteAuthList(SV.roles);
strcpy(VDOMAIN, "undefined.domain");
POLICY_SERVER[0] = '\0';
SV.admit = NULL;
SV.admittop = NULL;
SV.varadmit = NULL;
SV.varadmittop = NULL;
SV.deny = NULL;
SV.denytop = NULL;
SV.vardeny = NULL;
SV.vardenytop = NULL;
SV.roles = NULL;
SV.rolestop = NULL;
SV.trustkeylist = NULL;
SV.skipverify = NULL;
SV.attackerlist = NULL;
SV.nonattackerlist = NULL;
SV.multiconnlist = NULL;
PolicyDestroy(*policy);
*policy = NULL;
{
char *existing_policy_server = ReadPolicyServerFile(GetWorkDir());
SetPolicyServer(ctx, existing_policy_server);
free(existing_policy_server);
}
GetNameInfo3(ctx, AGENT_TYPE_SERVER);
GetInterfacesInfo(ctx);
Get3Environment(ctx, AGENT_TYPE_SERVER);
BuiltinClasses(ctx);
OSClasses(ctx);
KeepHardClasses(ctx);
EvalContextClassPutHard(ctx, CF_AGENTTYPES[config->agent_type]);
time_t t = SetReferenceTime();
UpdateTimeClasses(ctx, t);
*policy = GenericAgentLoadPolicy(ctx, config);
KeepPromises(ctx, *policy, config);
Summarize();
}
else
{
Log(LOG_LEVEL_INFO, "File changes contain errors -- ignoring");
}
}
else
{
Log(LOG_LEVEL_DEBUG, "No new promises found");
}
}