X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/6207d1bdab32119da7d30a3d38d3dcf6a5f09671..78bad7b5d52407128d5069cb4003f7d6d0d10dd1:/projects/stargazer/plugins/other/snmp/snmp.cpp?ds=inline

diff --git a/projects/stargazer/plugins/other/snmp/snmp.cpp b/projects/stargazer/plugins/other/snmp/snmp.cpp
index 8587c1bc..7e961208 100644
--- a/projects/stargazer/plugins/other/snmp/snmp.cpp
+++ b/projects/stargazer/plugins/other/snmp/snmp.cpp
@@ -12,7 +12,11 @@
 
 #include "asn1/OpenPDU.h"
 #include "asn1/ClosePDU.h"
-#include "asn1/SMUX-PDUs.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"
@@ -20,6 +24,64 @@
 #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:
@@ -32,6 +94,7 @@ public:
         };
     ~SNMP_AGENT_CREATOR()
         {
+        printfd(__FILE__, "SNMP_AGENT_CREATOR::~SNMP_AGENT_CREATOR()\n");
         delete snmpAgent;
         };
 
@@ -48,33 +111,33 @@ PLUGIN * GetPlugin()
 return sac.GetPlugin();
 }
 
-int output(const void * buffer, size_t size, void * data)
-{
-int * fd = static_cast<int *>(data);
-return write(*fd, buffer, size);
-}
-
 int SendOpenPDU(int fd)
 {
 const char * description = "Stg SNMP Agent";
-int oid[] = {1, 3, 6, 1, 4, 1, 9363, 1, 5, 2, 1, 1};
+//int oid[] = {1, 3, 6, 1, 4, 1, 9363, 1, 5, 2, 1, 1};
 asn_enc_rval_t error;
-OpenPDU msg;
+OpenPDU_t msg;
+
+memset(&msg, 0, sizeof(msg));
 
 msg.present = OpenPDU_PR_simple;
-asn_long2INTEGER(&msg.choice.simple.version, 1);
-OBJECT_IDENTIFIER_set_arcs(&msg.choice.simple.identity,
+asn_long2INTEGER(&msg.choice.simple.version, SimpleOpen__version_version_1);
+/*OBJECT_IDENTIFIER_set_arcs(&msg.choice.simple.identity,
                            oid,
                            sizeof(oid[0]),
-                           sizeof(oid));
-OCTET_STRING_fromBuf(&msg.choice.simple.description,
-                     description,
-                     sizeof(description));
-OCTET_STRING_fromBuf(&msg.choice.simple.password,
-                     "",
-                     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,
+                     "");
 
-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)
     {
@@ -84,17 +147,23 @@ if (error.encoded == -1)
     }
 else
     {
-    printfd(__FILE__, "OpenPDU encoded successfully");
+    write(fd, buffer, error.encoded);
+    printfd(__FILE__, "OpenPDU encoded successfully to %d bytes\n", error.encoded);
     }
 return 0;
 }
 
 int SendClosePDU(int fd)
 {
-ClosePDU msg = ClosePDU_goingDown;
+ClosePDU_t msg;
+
+memset(&msg, 0, sizeof(msg));
+
+asn_long2INTEGER(&msg, ClosePDU_goingDown);
 
+char buffer[1024];
 asn_enc_rval_t error;
-error = der_encode(&asn_DEF_ClosePDU, &msg, output, &fd);
+error = der_encode_to_buffer(&asn_DEF_ClosePDU, &msg, buffer, sizeof(buffer));
 
 if (error.encoded == -1)
     {
@@ -104,53 +173,147 @@ if (error.encoded == -1)
     }
 else
     {
-    printfd(__FILE__, "ClosePDU encoded successfully");
+    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 RecvSMUXPDUs(int fd)
+int SendSetResponsePDU(int fd, const PDU_t * pdu)
 {
-char buffer[8192];
-SMUX_PDUs * pdus;
+//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 -1;
+    return NULL;
     }
-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_close:
-        printfd(__FILE__, "PDUs: close\n");
-        break;
-    case SMUX_PDUs_PR_registerRequest:
-        printfd(__FILE__, "PDUs: registerRequest\n");
-        break;
-    case SMUX_PDUs_PR_registerResponse:
-        printfd(__FILE__, "PDUs: registerResponse\n");
-        break;
-    case SMUX_PDUs_PR_pdus:
-        printfd(__FILE__, "PDUs: pdus\n");
-        break;
-    case SMUX_PDUs_PR_commitOrRollback:
-        printfd(__FILE__, "PDUs: commitOrRollback\n");
-        break;
-    default:
-        printfd(__FILE__, "PDUs: default\n");
-    }
-asn_fprint(stderr, &asn_DEF_SMUX_PDUs, pdus);
-return 0;
+return pdus;
 }
 
 int ParseIntInRange(const std::string & str,
@@ -229,10 +392,20 @@ SNMP_AGENT::SNMP_AGENT()
       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);
 }
 
@@ -261,10 +434,9 @@ return 0;
 
 int SNMP_AGENT::Stop()
 {
+printfd(__FILE__, "SNMP_AGENT::Stop() - Before\n");
 running = false;
 
-close(sock);
-
 if (!stopped)
     {
     //5 seconds to thread stops itself
@@ -277,16 +449,22 @@ if (!stopped)
     //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__, "Cannot kill thread\n");
+            printfd(__FILE__, "SNMP_AGENT::Stop() - Cannot kill thread\n");
             return -1;
             }
-        printfd(__FILE__, "SNMP_AGENT killed Run\n");
+        printfd(__FILE__, "SNMP_AGENT::Stop() -  killed Run\n");
         }
     }
 
+pthread_join(thread, NULL);
+
+close(sock);
+
+printfd(__FILE__, "SNMP_AGENT::Stop() - After\n");
 return 0;
 }
 
@@ -302,13 +480,22 @@ return NULL;
 void SNMP_AGENT::Run()
 {
 SendOpenPDU(sock);
+SendRReqPDU(sock);
 running = true;
+stopped = false;
+printfd(__FILE__, "SNMP_AGENT::Run() - Before\n");
 while(running)
     {
-    RecvSMUXPDUs(sock);
-    struct timespec ts = {1, 0};
-    nanosleep(&ts, NULL);
+    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;
 }
@@ -339,3 +526,135 @@ if (connect(sock, reinterpret_cast<struct sockaddr *>(&addr), sizeof(addr)))
 
 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;
+}
+