Request dispatching added

[stg.git] / projects / stargazer / plugins / other / snmp / snmp.cpp

diff --git a/projects/stargazer/plugins/other/snmp/snmp.cpp b/projects/stargazer/plugins/other/snmp/snmp.cpp
index 4d26a8b92a83f0b11200892a0016c0eeaba875d4..ff0cb61483e249a289b82de1f6103aa3588ba9f9 100644 (file)
--- a/projects/stargazer/plugins/other/snmp/snmp.cpp
+++ b/projects/stargazer/plugins/other/snmp/snmp.cpp
@@ -1,8 +1,27 @@
+#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/OpenPDU.h"

+#include "asn1/ClosePDU.h"
+#include "asn1/RReqPDU.h"
+#include "asn1/OBJECT_IDENTIFIER.h"
+#include "asn1/ber_decoder.h"
+#include "asn1/der_encoder.h"

 
 #include "snmp.h"
 #include "stg/common.h"
 
 
 #include "snmp.h"
 #include "stg/common.h"
 

+bool WaitPackets(int sd);
+

 class SNMP_AGENT_CREATOR
 {
 private:
 class SNMP_AGENT_CREATOR
 {
 private:


@@ -15,6 +34,7 @@ public:
         };
     ~SNMP_AGENT_CREATOR()
         {
         };
     ~SNMP_AGENT_CREATOR()
         {

+        printfd(__FILE__, "SNMP_AGENT_CREATOR::~SNMP_AGENT_CREATOR()\n");

         delete snmpAgent;
         };
 
         delete snmpAgent;
         };
 


@@ -24,19 +44,35 @@ public:
         };
 };
 
         };
 };
 

-SNMP_AGENT_CREATOR pc;
+SNMP_AGENT_CREATOR sac;

 
 

-int output(const void * buffer, size_t size, void * data)
+PLUGIN * GetPlugin()

 {
 {

-int * fd = static_cast<int *>(data);
-return write(*fd, buffer, size);
+return sac.GetPlugin();

 }
 
 }
 

-int SendOpenPDU(int fd, OpenPDU & msg)
+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;
 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);
+OCTET_STRING_fromString(&msg.choice.simple.description,
+                     description);
+OCTET_STRING_fromString(&msg.choice.simple.password,
+                     "");

 
 

-error = der_encode(&asn_DEF_OpenPDU, &msg, output, &fd);
+char buffer[1024];
+error = der_encode_to_buffer(&asn_DEF_OpenPDU, &msg, buffer, sizeof(buffer));

 
 if (error.encoded == -1)
     {
 
 if (error.encoded == -1)
     {


@@ -46,36 +82,240 @@ if (error.encoded == -1)
     }
 else
     {
     }
 else
     {

-    printfd(__FILE__, "OpenPDU encoded successfully");
+    write(fd, buffer, error.encoded);
+    printfd(__FILE__, "OpenPDU encoded successfully to %d bytes\n", error.encoded);

     }
 return 0;
 }
 
     }
 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;
+}
+
+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),
 SNMP_AGENT::SNMP_AGENT()
     : PLUGIN(),
       running(false),

-      stopped(true)
+      stopped(true),
+      sock(-1)

 {
 pthread_mutex_init(&mutex, NULL);
 {
 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()
 {
 }
 
 SNMP_AGENT::~SNMP_AGENT()
 {

+printfd(__FILE__, "SNMP_AGENT::~SNMP_AGENT()\n");

 pthread_mutex_destroy(&mutex);
 }
 
 int SNMP_AGENT::ParseSettings()
 {
 pthread_mutex_destroy(&mutex);
 }
 
 int SNMP_AGENT::ParseSettings()
 {

-return 0;
+return snmpAgentSettings.ParseSettings(settings);

 }
 
 int SNMP_AGENT::Start()
 {
 }
 
 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()
 {
 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;
 }
 
 return 0;
 }
 


@@ -90,4 +330,180 @@ return NULL;
 
 void SNMP_AGENT::Run()
 {
 
 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);
+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);
+return false;
+}
+