From: Maxim Mamontov Date: Mon, 30 May 2011 17:58:37 +0000 (+0300) Subject: Partially working snmp agent X-Git-Tag: 2.408-alpha~113 X-Git-Url: https://git.stg.codes/stg.git/commitdiff_plain/6207d1bdab32119da7d30a3d38d3dcf6a5f09671?hp=5223bc7c163c9cd52e9ae4d8ad93a96e40e86632 Partially working snmp agent --- diff --git a/projects/stargazer/plugins/other/snmp/Makefile b/projects/stargazer/plugins/other/snmp/Makefile index 2f6eeb74..047c29ec 100644 --- a/projects/stargazer/plugins/other/snmp/Makefile +++ b/projects/stargazer/plugins/other/snmp/Makefile @@ -45,7 +45,35 @@ SRCS = snmp.cpp \ asn1/ClosePDU.c \ asn1/RReqPDU.c \ asn1/RRspPDU.c \ - asn1/SOutPDU.c + asn1/SOutPDU.c \ + asn1/ANY.c \ + asn1/BOOLEAN.c \ + asn1/INTEGER.c \ + asn1/NULL.c \ + asn1/NativeEnumerated.c \ + asn1/NativeInteger.c \ + asn1/OBJECT_IDENTIFIER.c \ + asn1/asn_SEQUENCE_OF.c \ + asn1/asn_SET_OF.c \ + asn1/constr_CHOICE.c \ + asn1/constr_SEQUENCE.c \ + asn1/constr_SEQUENCE_OF.c \ + asn1/constr_SET_OF.c \ + asn1/OCTET_STRING.c \ + asn1/BIT_STRING.c \ + asn1/asn_codecs_prim.c \ + asn1/ber_tlv_length.c \ + asn1/ber_tlv_tag.c \ + asn1/ber_decoder.c \ + asn1/der_encoder.c \ + asn1/constr_TYPE.c \ + asn1/constraints.c \ + asn1/xer_support.c \ + asn1/xer_decoder.c \ + asn1/xer_encoder.c \ + asn1/per_support.c \ + asn1/per_decoder.c \ + asn1/per_encoder.c STGLIBS = -lstgcommon diff --git a/projects/stargazer/plugins/other/snmp/snmp.cpp b/projects/stargazer/plugins/other/snmp/snmp.cpp index 4d26a8b9..8587c1bc 100644 --- a/projects/stargazer/plugins/other/snmp/snmp.cpp +++ b/projects/stargazer/plugins/other/snmp/snmp.cpp @@ -1,4 +1,21 @@ +#include +#include +#include + +#include +#include +#include +#include + +#include +#include + #include "asn1/OpenPDU.h" +#include "asn1/ClosePDU.h" +#include "asn1/SMUX-PDUs.h" +#include "asn1/OBJECT_IDENTIFIER.h" +#include "asn1/ber_decoder.h" +#include "asn1/der_encoder.h" #include "snmp.h" #include "stg/common.h" @@ -24,7 +41,12 @@ public: }; }; -SNMP_AGENT_CREATOR pc; +SNMP_AGENT_CREATOR sac; + +PLUGIN * GetPlugin() +{ +return sac.GetPlugin(); +} int output(const void * buffer, size_t size, void * data) { @@ -32,9 +54,25 @@ int * fd = static_cast(data); return write(*fd, buffer, size); } -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; +OpenPDU msg; + +msg.present = OpenPDU_PR_simple; +asn_long2INTEGER(&msg.choice.simple.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); error = der_encode(&asn_DEF_OpenPDU, &msg, output, &fd); @@ -51,10 +89,144 @@ else return 0; } +int SendClosePDU(int fd) +{ +ClosePDU msg = ClosePDU_goingDown; + +asn_enc_rval_t error; +error = der_encode(&asn_DEF_ClosePDU, &msg, output, &fd); + +if (error.encoded == -1) + { + printfd(__FILE__, "Could not encode ClosePDU (at %s)\n", + error.failed_type ? error.failed_type->name : "unknown"); + return -1; + } +else + { + printfd(__FILE__, "ClosePDU encoded successfully"); + } +return 0; +} + +int RecvSMUXPDUs(int fd) +{ +char buffer[8192]; +SMUX_PDUs * pdus; + +size_t length = read(fd, buffer, sizeof(buffer)); +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; + } +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; +} + +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::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) + stopped(true), + sock(-1) { pthread_mutex_init(&mutex, NULL); } @@ -66,16 +238,55 @@ pthread_mutex_destroy(&mutex); int SNMP_AGENT::ParseSettings() { -return 0; +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() { +running = false; + +close(sock); + +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) + { + if (pthread_kill(thread, SIGINT)) + { + errorStr = "Cannot kill thread."; + printfd(__FILE__, "Cannot kill thread\n"); + return -1; + } + printfd(__FILE__, "SNMP_AGENT killed Run\n"); + } + } + return 0; } @@ -90,4 +301,41 @@ return NULL; void SNMP_AGENT::Run() { +SendOpenPDU(sock); +running = true; +while(running) + { + RecvSMUXPDUs(sock); + struct timespec ts = {1, 0}; + nanosleep(&ts, NULL); + } +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(&addr), sizeof(addr))) + { + errorStr = "Cannot connect."; + printfd(__FILE__, "Cannot connect. Message: '%s'\n", strerror(errno)); + return true; + } + +return false; } diff --git a/projects/stargazer/plugins/other/snmp/snmp.h b/projects/stargazer/plugins/other/snmp/snmp.h index 7f4d67d1..fe5fa05e 100644 --- a/projects/stargazer/plugins/other/snmp/snmp.h +++ b/projects/stargazer/plugins/other/snmp/snmp.h @@ -4,7 +4,6 @@ #include #include -#include #include "stg/os_int.h" #include "stg/plugin.h" @@ -23,8 +22,16 @@ public: const std::string & GetStrError() const { return errorStr; } int ParseSettings(const MODULE_SETTINGS & s); + uint32_t GetIP() const { return ip; } + uint16_t GetPort() const { return port; } + const std::string GetPassword() const { return password; } + private: mutable std::string errorStr; + + uint32_t ip; + uint16_t port; + std::string password; }; //----------------------------------------------------------------------------- class SNMP_AGENT : public PLUGIN { @@ -38,7 +45,7 @@ public: void SetTraffcounter(TRAFFCOUNTER *) {} void SetStore(STORE *) {} void SetStgSettings(const SETTINGS *) {} - void SetSettings(const MODULE_SETTINGS &) {} + void SetSettings(const MODULE_SETTINGS & s) { settings = s; } int ParseSettings(); int Start(); @@ -54,6 +61,7 @@ public: private: static void * Runner(void * d); void Run(); + bool PrepareNet(); mutable std::string errorStr; SNMP_AGENT_SETTINGS snmpAgentSettings; @@ -63,7 +71,11 @@ private: pthread_mutex_t mutex; bool running; bool stopped; + + int sock; }; //----------------------------------------------------------------------------- +extern "C" PLUGIN * GetPlugin(); + #endif