+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+
+#include <cstring>
+#include <cerrno>
+#include <ctime>
+#include <csignal>
+
+#include <vector>
+#include <algorithm>
+
+#include "asn1/OpenPDU.h"
+#include "asn1/ClosePDU.h"
+#include "asn1/RReqPDU.h"
+#include "asn1/GetRequest-PDU.h"
+#include "asn1/GetResponse-PDU.h"
+#include "asn1/VarBindList.h"
+#include "asn1/VarBind.h"
+#include "asn1/OBJECT_IDENTIFIER.h"
+#include "asn1/ber_decoder.h"
+#include "asn1/der_encoder.h"
+
+#include "snmp.h"
+#include "stg/common.h"
+
+bool WaitPackets(int sd);
+
+std::string OI2String(OBJECT_IDENTIFIER_t * oi)
+{
+std::string res;
+
+int arcs[1024];
+int count = OBJECT_IDENTIFIER_get_arcs(oi, arcs, sizeof(arcs[0]), 1024);
+
+if (count > 1024)
+ return "";
+
+for (int i = 0; i < count; ++i)
+ {
+ res += ".";
+ std::string arc;
+ strprintf(&arc, "%d", arcs[i]);
+ res += arc;
+ }
+
+return res;
+}
+
+bool String2OI(const std::string & str, OBJECT_IDENTIFIER_t * oi)
+{
+size_t left = 0, pos = 0, arcPos = 0;
+int arcs[1024];
+pos = str.find_first_of('.', left);
+if (pos == 0)
+ {
+ left = 1;
+ pos = str.find_first_of('.', left);
+ }
+while (pos != std::string::npos)
+ {
+ int arc = 0;
+ if (str2x(str.substr(left, left - pos), arc))
+ {
+ return false;
+ }
+ arcs[arcPos++] = arc;
+ left = pos + 1;
+ pos = str.find_first_of('.', left);
+ }
+if (left < str.length())
+ {
+ int arc = 0;
+ if (str2x(str.substr(left, left - pos), arc))
+ {
+ return false;
+ }
+ arcs[arcPos++] = arc;
+ }
+printfd(__FILE__, "String2OI() - arcPos: %d\n", arcPos);
+OBJECT_IDENTIFIER_set_arcs(oi, arcs, sizeof(arcs[0]), arcPos);
+return true;
+}
+
+class SNMP_AGENT_CREATOR
+{
+private:
+ SNMP_AGENT * snmpAgent;
+
+public:
+ SNMP_AGENT_CREATOR()
+ : snmpAgent(new SNMP_AGENT())
+ {
+ };
+ ~SNMP_AGENT_CREATOR()
+ {
+ printfd(__FILE__, "SNMP_AGENT_CREATOR::~SNMP_AGENT_CREATOR()\n");
+ delete snmpAgent;
+ };
+
+ SNMP_AGENT * GetPlugin()
+ {
+ return snmpAgent;
+ };
+};
+
+SNMP_AGENT_CREATOR sac;
+
+PLUGIN * GetPlugin()
+{
+return sac.GetPlugin();
+}
+
+int SendOpenPDU(int fd)
+{
+const char * description = "Stg SNMP Agent";
+//int oid[] = {1, 3, 6, 1, 4, 1, 9363, 1, 5, 2, 1, 1};
+asn_enc_rval_t error;
+OpenPDU_t msg;
+
+memset(&msg, 0, sizeof(msg));
+
+msg.present = OpenPDU_PR_simple;
+asn_long2INTEGER(&msg.choice.simple.version, SimpleOpen__version_version_1);
+/*OBJECT_IDENTIFIER_set_arcs(&msg.choice.simple.identity,
+ oid,
+ sizeof(oid[0]),
+ 7);*/
+if (!String2OI(".1.3.6.1.4.1.9363", &msg.choice.simple.identity))
+ {
+ printfd(__FILE__, "SendOpenPDU() - failed to convert string to OBJECT_IDENTIFIER\n");
+ return -1;
+ }
+OCTET_STRING_fromString(&msg.choice.simple.description,
+ description);
+OCTET_STRING_fromString(&msg.choice.simple.password,
+ "");
+
+char buffer[1024];
+error = der_encode_to_buffer(&asn_DEF_OpenPDU, &msg, buffer, sizeof(buffer));
+
+if (error.encoded == -1)
+ {
+ printfd(__FILE__, "Could not encode OpenPDU (at %s)\n",
+ error.failed_type ? error.failed_type->name : "unknown");
+ return -1;
+ }
+else
+ {
+ write(fd, buffer, error.encoded);
+ printfd(__FILE__, "OpenPDU encoded successfully to %d bytes\n", error.encoded);
+ }
+return 0;
+}
+
+int SendClosePDU(int fd)
+{
+ClosePDU_t msg;
+
+memset(&msg, 0, sizeof(msg));
+
+asn_long2INTEGER(&msg, ClosePDU_goingDown);
+
+char buffer[1024];
+asn_enc_rval_t error;
+error = der_encode_to_buffer(&asn_DEF_ClosePDU, &msg, buffer, sizeof(buffer));
+
+if (error.encoded == -1)
+ {
+ printfd(__FILE__, "Could not encode ClosePDU (at %s)\n",
+ error.failed_type ? error.failed_type->name : "unknown");
+ return -1;
+ }
+else
+ {
+ write(fd, buffer, error.encoded);
+ printfd(__FILE__, "ClosePDU encoded successfully\n");
+ }
+return 0;
+}
+
+int SendRReqPDU(int fd)
+{
+int oid[] = {1, 3, 6, 1, 4, 1, 9363, 1};
+asn_enc_rval_t error;
+RReqPDU_t msg;
+
+memset(&msg, 0, sizeof(msg));
+
+msg.priority = 0;
+asn_long2INTEGER(&msg.operation, RReqPDU__operation_readOnly);
+OBJECT_IDENTIFIER_set_arcs(&msg.subtree,
+ oid,
+ sizeof(oid[0]),
+ 8);
+
+char buffer[1024];
+error = der_encode_to_buffer(&asn_DEF_RReqPDU, &msg, buffer, sizeof(buffer));
+
+if (error.encoded == -1)
+ {
+ printfd(__FILE__, "Could not encode RReqPDU (at %s)\n",
+ error.failed_type ? error.failed_type->name : "unknown");
+ return -1;
+ }
+else
+ {
+ write(fd, buffer, error.encoded);
+ printfd(__FILE__, "RReqPDU encoded successfully to %d bytes\n", error.encoded);
+ }
+return 0;
+}
+
+int SendGetResponsePDU(int fd, const PDU_t * pdu)
+{
+asn_enc_rval_t error;
+GetResponse_PDU_t msg;
+
+memset(&msg, 0, sizeof(msg));
+
+msg.request_id = pdu->request_id;
+asn_long2INTEGER(&msg.error_status, 0);
+asn_long2INTEGER(&msg.error_index, 0);
+
+VarBind_t vb;
+
+memset(&vb, 0, sizeof(vb));
+
+if (!String2OI(".1.3.6.1.4.1.9363.1", &vb.name))
+ {
+ printfd(__FILE__, "SendSetResponsePDU() - failed to convert string to OBJECT_IDENTIFIER\n");
+ return -1;
+ }
+
+ObjectSyntax_t * objectSyntax = &vb.value;
+objectSyntax->present = ObjectSyntax_PR_simple;
+SimpleSyntax_t * simpleSyntax = &objectSyntax->choice.simple;
+simpleSyntax->present = SimpleSyntax_PR_number;
+asn_long2INTEGER(&simpleSyntax->choice.number, 1);
+
+
+ASN_SEQUENCE_ADD(&msg.variable_bindings, &vb);
+
+/*const VarBindList_t * vbl = &pdu->variable_bindings;
+for (int i = 0; i < vbl->list.count; ++i)
+ {
+ VarBind_t * vb = pdu->variable_bindings.list.array[i];
+ printfd(__FILE__, "OID: %s\n", OI2String(&vb->name).c_str());
+ asn_fprint(stderr, &asn_DEF_ObjectSyntax, &vb->value);
+ }*/
+
+char buffer[1024];
+error = der_encode_to_buffer(&asn_DEF_GetResponse_PDU, &msg, buffer, sizeof(buffer));
+
+if (error.encoded == -1)
+ {
+ printfd(__FILE__, "Could not encode GetResponsePDU (at %s)\n",
+ error.failed_type ? error.failed_type->name : "unknown");
+ return -1;
+ }
+else
+ {
+ write(fd, buffer, error.encoded);
+ printfd(__FILE__, "GetResponsePDU encoded successfully to %d bytes\n", error.encoded);
+ }
+return 0;
+}
+
+int SendSetResponsePDU(int fd, const PDU_t * pdu)
+{
+//int oid[] = {1, 3, 6, 1, 4, 1, 9363, 1};
+asn_enc_rval_t error;
+GetResponse_PDU_t msg;
+
+memset(&msg, 0, sizeof(msg));
+
+msg.request_id = pdu->request_id;
+asn_long2INTEGER(&msg.error_status, PDU__error_status_readOnly);
+asn_long2INTEGER(&msg.error_index, 0);
+
+char buffer[1024];
+error = der_encode_to_buffer(&asn_DEF_GetResponse_PDU, &msg, buffer, sizeof(buffer));
+
+if (error.encoded == -1)
+ {
+ printfd(__FILE__, "Could not encode GetResponsePDU (at %s)\n",
+ error.failed_type ? error.failed_type->name : "unknown");
+ return -1;
+ }
+else
+ {
+ write(fd, buffer, error.encoded);
+ printfd(__FILE__, "GetResponsePDU encoded successfully to %d bytes\n", error.encoded);
+ }
+return 0;
+}
+
+SMUX_PDUs_t * RecvSMUXPDUs(int fd)
+{
+char buffer[1024];
+SMUX_PDUs_t * pdus = NULL;
+
+memset(buffer, 0, sizeof(buffer));
+
+size_t length = read(fd, buffer, sizeof(buffer));
+if (length < 1)
+ return NULL;
+asn_dec_rval_t error;
+error = ber_decode(0, &asn_DEF_SMUX_PDUs, (void **)&pdus, buffer, length);
+if(error.code != RC_OK)
+ {
+ printfd(__FILE__, "Failed to decode PDUs at byte %ld\n",
+ (long)error.consumed);
+ return NULL;
+ }
+return pdus;
+}
+
+int ParseIntInRange(const std::string & str,
+ int min,
+ int max,
+ int * val)
+{
+if (str2x(str.c_str(), *val))
+ {
+ return -1;
+ }
+if (*val < min || *val > max)
+ {
+ return -1;
+ }
+return 0;
+}
+
+SNMP_AGENT_SETTINGS::SNMP_AGENT_SETTINGS()
+ : ip(0),
+ port(0)
+{}
+
+int SNMP_AGENT_SETTINGS::ParseSettings(const MODULE_SETTINGS & s)
+{
+PARAM_VALUE pv;
+std::vector<PARAM_VALUE>::const_iterator pvi;
+int p;
+///////////////////////////
+pv.param = "Port";
+pvi = std::find(s.moduleParams.begin(), s.moduleParams.end(), pv);
+if (pvi == s.moduleParams.end())
+ {
+ errorStr = "Parameter \'Port\' not found.";
+ printfd(__FILE__, "Parameter 'Port' not found\n");
+ return -1;
+ }
+if (ParseIntInRange(pvi->value[0], 2, 65535, &p))
+ {
+ errorStr = "Cannot parse parameter \'Port\': " + errorStr;
+ printfd(__FILE__, "Cannot parse parameter 'Port'\n");
+ return -1;
+ }
+port = p;
+
+pv.param = "Password";
+pvi = std::find(s.moduleParams.begin(), s.moduleParams.end(), pv);
+if (pvi == s.moduleParams.end())
+ {
+ errorStr = "Parameter \'Password\' not found.";
+ printfd(__FILE__, "Parameter 'Password' not found\n");
+ password = "";
+ }
+else
+ {
+ password = pvi->value[0];
+ }
+
+pv.param = "Server";
+pvi = std::find(s.moduleParams.begin(), s.moduleParams.end(), pv);
+if (pvi == s.moduleParams.end())
+ {
+ errorStr = "Parameter \'Server\' not found.";
+ printfd(__FILE__, "Parameter 'Server' not found\n");
+ return -1;
+ }
+ip = inet_strington(pvi->value[0]);
+
+return 0;
+}
+
+SNMP_AGENT::SNMP_AGENT()
+ : PLUGIN(),
+ running(false),
+ stopped(true),
+ sock(-1)
+{
+pthread_mutex_init(&mutex, NULL);
+
+smuxHandlers[SMUX_PDUs_PR_close] = &SNMP_AGENT::CloseHandler;
+smuxHandlers[SMUX_PDUs_PR_registerResponse] = &SNMP_AGENT::RegisterResponseHandler;
+smuxHandlers[SMUX_PDUs_PR_pdus] = &SNMP_AGENT::PDUsHandler;
+smuxHandlers[SMUX_PDUs_PR_commitOrRollback] = &SNMP_AGENT::CommitOrRollbackHandler;
+
+pdusHandlers[PDUs_PR_get_request] = &SNMP_AGENT::GetRequestHandler;
+pdusHandlers[PDUs_PR_get_next_request] = &SNMP_AGENT::GetNextRequestHandler;
+pdusHandlers[PDUs_PR_set_request] = &SNMP_AGENT::SetRequestHandler;
+}
+
+SNMP_AGENT::~SNMP_AGENT()
+{
+printfd(__FILE__, "SNMP_AGENT::~SNMP_AGENT()\n");
+pthread_mutex_destroy(&mutex);
+}
+
+int SNMP_AGENT::ParseSettings()
+{
+return snmpAgentSettings.ParseSettings(settings);
+}
+
+int SNMP_AGENT::Start()
+{
+if (PrepareNet())
+ return -1;
+
+if (!running)
+ {
+ if (pthread_create(&thread, NULL, Runner, this))
+ {
+ errorStr = "Cannot create thread.";
+ printfd(__FILE__, "Cannot create thread\n");
+ return -1;
+ }
+ }
+
+return 0;
+}
+
+int SNMP_AGENT::Stop()
+{
+printfd(__FILE__, "SNMP_AGENT::Stop() - Before\n");
+running = false;
+
+if (!stopped)
+ {
+ //5 seconds to thread stops itself
+ for (int i = 0; i < 25 && !stopped; i++)
+ {
+ struct timespec ts = {0, 200000000};
+ nanosleep(&ts, NULL);
+ }
+
+ //after 5 seconds waiting thread still running. now killing it
+ if (!stopped)
+ {
+ printfd(__FILE__, "SNMP_AGENT::Stop() - failed to stop thread, killing it\n");
+ if (pthread_kill(thread, SIGINT))
+ {
+ errorStr = "Cannot kill thread.";
+ printfd(__FILE__, "SNMP_AGENT::Stop() - Cannot kill thread\n");
+ return -1;
+ }
+ printfd(__FILE__, "SNMP_AGENT::Stop() - killed Run\n");
+ }
+ }
+
+pthread_join(thread, NULL);
+
+close(sock);
+
+printfd(__FILE__, "SNMP_AGENT::Stop() - After\n");
+return 0;
+}
+
+void * SNMP_AGENT::Runner(void * d)
+{
+SNMP_AGENT * snmpAgent = static_cast<SNMP_AGENT *>(d);
+
+snmpAgent->Run();
+
+return NULL;
+}
+
+void SNMP_AGENT::Run()
+{
+SendOpenPDU(sock);
+SendRReqPDU(sock);
+running = true;
+stopped = false;
+printfd(__FILE__, "SNMP_AGENT::Run() - Before\n");
+while(running)
+ {
+ if (WaitPackets(sock))
+ {
+ SMUX_PDUs_t * pdus = RecvSMUXPDUs(sock);
+ if (pdus)
+ DispatchPDUs(pdus);
+ }
+ if (!running)
+ break;
+ }
+printfd(__FILE__, "SNMP_AGENT::Run() - After\n");
+SendClosePDU(sock);
+stopped = true;
+}
+
+bool SNMP_AGENT::PrepareNet()
+{
+sock = socket(AF_INET, SOCK_STREAM, 0);
+
+if (sock < 0)
+ {
+ errorStr = "Cannot create socket.";
+ printfd(__FILE__, "Cannot create socket\n");
+ return true;
+ }
+
+struct sockaddr_in addr;
+
+addr.sin_family = AF_INET;
+addr.sin_port = htons(snmpAgentSettings.GetPort());
+addr.sin_addr.s_addr = snmpAgentSettings.GetIP();
+
+if (connect(sock, reinterpret_cast<struct sockaddr *>(&addr), sizeof(addr)))
+ {
+ errorStr = "Cannot connect.";
+ printfd(__FILE__, "Cannot connect. Message: '%s'\n", strerror(errno));
+ return true;
+ }
+
+return false;
+}
+
+bool WaitPackets(int sd)
+{
+fd_set rfds;
+FD_ZERO(&rfds);
+FD_SET(sd, &rfds);
+
+struct timeval tv;
+tv.tv_sec = 0;
+tv.tv_usec = 500000;
+
+int res = select(sd + 1, &rfds, NULL, NULL, &tv);
+if (res == -1) // Error
+ {
+ if (errno != EINTR)
+ {
+ printfd(__FILE__, "Error on select: '%s'\n", strerror(errno));
+ }
+ return false;
+ }
+
+if (res == 0) // Timeout
+ {
+ return false;
+ }
+
+return true;
+}
+
+bool SNMP_AGENT::DispatchPDUs(const SMUX_PDUs_t * pdus)
+{
+SMUXHandlers::iterator it;
+it = smuxHandlers.find(pdus->present);
+if (it != smuxHandlers.end())
+ {
+ return (this->*(it->second))(pdus);
+ }
+else
+ {
+ switch (pdus->present)
+ {
+ case SMUX_PDUs_PR_NOTHING:
+ printfd(__FILE__, "PDUs: nothing\n");
+ break;
+ case SMUX_PDUs_PR_open:
+ printfd(__FILE__, "PDUs: open\n");
+ break;
+ case SMUX_PDUs_PR_registerRequest:
+ printfd(__FILE__, "PDUs: registerRequest\n");
+ break;
+ default:
+ printfd(__FILE__, "PDUs: undefined\n");
+ }
+ asn_fprint(stderr, &asn_DEF_SMUX_PDUs, pdus);
+ }
+return false;
+}
+
+bool SNMP_AGENT::CloseHandler(const SMUX_PDUs_t * pdus)
+{
+printfd(__FILE__, "SNMP_AGENT::CloseHandler()\n");
+asn_fprint(stderr, &asn_DEF_SMUX_PDUs, pdus);
+return false;
+}
+
+bool SNMP_AGENT::RegisterResponseHandler(const SMUX_PDUs_t * pdus)
+{
+printfd(__FILE__, "SNMP_AGENT::RegisterResponseHandler()\n");
+asn_fprint(stderr, &asn_DEF_SMUX_PDUs, pdus);
+return false;
+}
+
+bool SNMP_AGENT::PDUsHandler(const SMUX_PDUs_t * pdus)
+{
+printfd(__FILE__, "SNMP_AGENT::PDUsHandler()\n");
+asn_fprint(stderr, &asn_DEF_SMUX_PDUs, pdus);
+PDUsHandlers::iterator it;
+it = pdusHandlers.find(pdus->choice.pdus.present);
+if (it != pdusHandlers.end())
+ {
+ return (this->*(it->second))(&pdus->choice.pdus);
+ }
+else
+ {
+ switch (pdus->present)
+ {
+ case PDUs_PR_NOTHING:
+ printfd(__FILE__, "SNMP_AGENT::PDUsHandler() - nothing\n");
+ break;
+ case PDUs_PR_get_response:
+ printfd(__FILE__, "SNMP_AGENT::PDUsHandler() - get response\n");
+ break;
+ case PDUs_PR_trap:
+ printfd(__FILE__, "SNMP_AGENT::PDUsHandler() - trap\n");
+ break;
+ default:
+ printfd(__FILE__, "SNMP_AGENT::PDUsHandler() - undefined\n");
+ }
+ }
+return false;
+}
+
+bool SNMP_AGENT::CommitOrRollbackHandler(const SMUX_PDUs_t * pdus)
+{
+printfd(__FILE__, "SNMP_AGENT::CommitOrRollbackHandler()\n");
+asn_fprint(stderr, &asn_DEF_SMUX_PDUs, pdus);
+return false;
+}
+
+bool SNMP_AGENT::GetRequestHandler(const PDUs_t * pdus)
+{
+printfd(__FILE__, "SNMP_AGENT::GetRequestHandler()\n");
+asn_fprint(stderr, &asn_DEF_PDUs, pdus);
+SendGetResponsePDU(sock, &pdus->choice.get_request);
+return false;
+}
+
+bool SNMP_AGENT::GetNextRequestHandler(const PDUs_t * pdus)
+{
+printfd(__FILE__, "SNMP_AGENT::GetNextRequestHandler()\n");
+asn_fprint(stderr, &asn_DEF_PDUs, pdus);
+return false;
+}
+
+bool SNMP_AGENT::SetRequestHandler(const PDUs_t * pdus)
+{
+printfd(__FILE__, "SNMP_AGENT::SetRequestHandler()\n");
+asn_fprint(stderr, &asn_DEF_PDUs, pdus);
+SendSetResponsePDU(sock, &pdus->choice.set_request);
+return false;
+}
+
git.stg.codes / stg.git / blobdiff