mirror of
https://github.com/didyouexpectthat/zerotierone.git
synced 2024-09-20 12:50:20 -07:00
292 lines
8.9 KiB
C++
292 lines
8.9 KiB
C++
/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include "Http.hpp"
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#include "Phy.hpp"
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#include "OSUtils.hpp"
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#include "../node/Constants.hpp"
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#include "../node/Utils.hpp"
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#ifdef ZT_USE_SYSTEM_HTTP_PARSER
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#include <http_parser.h>
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#else
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#include "../ext/http-parser/http_parser.h"
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#endif
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namespace ZeroTier {
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namespace {
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static int ShttpOnMessageBegin(http_parser *parser);
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static int ShttpOnUrl(http_parser *parser,const char *ptr,size_t length);
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#if (HTTP_PARSER_VERSION_MAJOR >= 2) && (HTTP_PARSER_VERSION_MINOR >= 2)
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static int ShttpOnStatus(http_parser *parser,const char *ptr,size_t length);
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#else
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static int ShttpOnStatus(http_parser *parser);
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#endif
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static int ShttpOnHeaderField(http_parser *parser,const char *ptr,size_t length);
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static int ShttpOnValue(http_parser *parser,const char *ptr,size_t length);
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static int ShttpOnHeadersComplete(http_parser *parser);
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static int ShttpOnBody(http_parser *parser,const char *ptr,size_t length);
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static int ShttpOnMessageComplete(http_parser *parser);
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#if (HTTP_PARSER_VERSION_MAJOR >= 2) && (HTTP_PARSER_VERSION_MINOR >= 1)
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static const struct http_parser_settings HTTP_PARSER_SETTINGS = {
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ShttpOnMessageBegin,
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ShttpOnUrl,
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ShttpOnStatus,
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ShttpOnHeaderField,
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ShttpOnValue,
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ShttpOnHeadersComplete,
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ShttpOnBody,
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ShttpOnMessageComplete
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};
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#else
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static const struct http_parser_settings HTTP_PARSER_SETTINGS = {
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ShttpOnMessageBegin,
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ShttpOnUrl,
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ShttpOnHeaderField,
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ShttpOnValue,
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ShttpOnHeadersComplete,
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ShttpOnBody,
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ShttpOnMessageComplete
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};
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#endif
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struct HttpPhyHandler
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{
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// not used
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inline void phyOnDatagram(PhySocket *sock,void **uptr,const struct sockaddr *localAddr,const struct sockaddr *from,void *data,unsigned long len) {}
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inline void phyOnTcpAccept(PhySocket *sockL,PhySocket *sockN,void **uptrL,void **uptrN,const struct sockaddr *from) {}
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inline void phyOnTcpConnect(PhySocket *sock,void **uptr,bool success)
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{
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if (success) {
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phy->setNotifyWritable(sock,true);
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} else {
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*responseBody = "connection failed";
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error = true;
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done = true;
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}
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}
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inline void phyOnTcpClose(PhySocket *sock,void **uptr)
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{
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done = true;
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}
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inline void phyOnTcpData(PhySocket *sock,void **uptr,void *data,unsigned long len)
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{
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lastActivity = OSUtils::now();
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http_parser_execute(&parser,&HTTP_PARSER_SETTINGS,(const char *)data,len);
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if ((parser.upgrade)||(parser.http_errno != HPE_OK))
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phy->close(sock);
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}
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inline void phyOnTcpWritable(PhySocket *sock,void **uptr)
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{
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if (writePtr < writeSize) {
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long n = phy->streamSend(sock,writeBuf + writePtr,writeSize - writePtr,true);
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if (n > 0)
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writePtr += n;
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}
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if (writePtr >= writeSize)
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phy->setNotifyWritable(sock,false);
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}
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inline void phyOnFileDescriptorActivity(PhySocket *sock,void **uptr,bool readable,bool writable) {}
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#ifdef __UNIX_LIKE__
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inline void phyOnUnixAccept(PhySocket *sockL,PhySocket *sockN,void **uptrL,void **uptrN) {}
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inline void phyOnUnixClose(PhySocket *sock,void **uptr) {}
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inline void phyOnUnixData(PhySocket *sock,void **uptr,void *data,unsigned long len) {}
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inline void phyOnUnixWritable(PhySocket *sock,void **uptr) {}
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#endif // __UNIX_LIKE__
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http_parser parser;
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std::string currentHeaderField;
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std::string currentHeaderValue;
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unsigned long messageSize;
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unsigned long writePtr;
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uint64_t lastActivity;
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unsigned long writeSize;
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char writeBuf[32768];
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unsigned long maxResponseSize;
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std::map<std::string,std::string> *responseHeaders;
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std::string *responseBody;
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bool error;
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bool done;
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Phy<HttpPhyHandler *> *phy;
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PhySocket *sock;
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};
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static int ShttpOnMessageBegin(http_parser *parser)
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{
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return 0;
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}
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static int ShttpOnUrl(http_parser *parser,const char *ptr,size_t length)
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{
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return 0;
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}
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#if (HTTP_PARSER_VERSION_MAJOR >= 2) && (HTTP_PARSER_VERSION_MINOR >= 2)
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static int ShttpOnStatus(http_parser *parser,const char *ptr,size_t length)
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#else
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static int ShttpOnStatus(http_parser *parser)
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#endif
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{
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/*
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HttpPhyHandler *hh = reinterpret_cast<HttpPhyHandler *>(parser->data);
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hh->messageSize += (unsigned long)length;
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if (hh->messageSize > hh->maxResponseSize)
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return -1;
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*/
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return 0;
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}
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static int ShttpOnHeaderField(http_parser *parser,const char *ptr,size_t length)
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{
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HttpPhyHandler *hh = reinterpret_cast<HttpPhyHandler *>(parser->data);
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hh->messageSize += (unsigned long)length;
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if (hh->messageSize > hh->maxResponseSize)
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return -1;
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if ((hh->currentHeaderField.length())&&(hh->currentHeaderValue.length())) {
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(*hh->responseHeaders)[hh->currentHeaderField] = hh->currentHeaderValue;
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hh->currentHeaderField = "";
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hh->currentHeaderValue = "";
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}
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for(size_t i=0;i<length;++i)
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hh->currentHeaderField.push_back(OSUtils::toLower(ptr[i]));
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return 0;
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}
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static int ShttpOnValue(http_parser *parser,const char *ptr,size_t length)
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{
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HttpPhyHandler *hh = reinterpret_cast<HttpPhyHandler *>(parser->data);
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hh->messageSize += (unsigned long)length;
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if (hh->messageSize > hh->maxResponseSize)
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return -1;
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hh->currentHeaderValue.append(ptr,length);
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return 0;
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}
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static int ShttpOnHeadersComplete(http_parser *parser)
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{
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HttpPhyHandler *hh = reinterpret_cast<HttpPhyHandler *>(parser->data);
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if ((hh->currentHeaderField.length())&&(hh->currentHeaderValue.length()))
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(*hh->responseHeaders)[hh->currentHeaderField] = hh->currentHeaderValue;
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return 0;
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}
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static int ShttpOnBody(http_parser *parser,const char *ptr,size_t length)
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{
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HttpPhyHandler *hh = reinterpret_cast<HttpPhyHandler *>(parser->data);
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hh->messageSize += (unsigned long)length;
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if (hh->messageSize > hh->maxResponseSize)
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return -1;
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hh->responseBody->append(ptr,length);
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return 0;
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}
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static int ShttpOnMessageComplete(http_parser *parser)
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{
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HttpPhyHandler *hh = reinterpret_cast<HttpPhyHandler *>(parser->data);
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hh->phy->close(hh->sock);
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return 0;
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}
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} // anonymous namespace
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unsigned int Http::_do(
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const char *method,
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unsigned long maxResponseSize,
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unsigned long timeout,
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const struct sockaddr *remoteAddress,
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const char *path,
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const std::map<std::string,std::string> &requestHeaders,
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const void *requestBody,
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unsigned long requestBodyLength,
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std::map<std::string,std::string> &responseHeaders,
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std::string &responseBody)
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{
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try {
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responseHeaders.clear();
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responseBody = "";
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HttpPhyHandler handler;
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http_parser_init(&(handler.parser),HTTP_RESPONSE);
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handler.parser.data = (void *)&handler;
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handler.messageSize = 0;
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handler.writePtr = 0;
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handler.lastActivity = OSUtils::now();
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try {
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handler.writeSize = Utils::snprintf(handler.writeBuf,sizeof(handler.writeBuf),"%s %s HTTP/1.1\r\n",method,path);
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for(std::map<std::string,std::string>::const_iterator h(requestHeaders.begin());h!=requestHeaders.end();++h)
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handler.writeSize += Utils::snprintf(handler.writeBuf + handler.writeSize,sizeof(handler.writeBuf) - handler.writeSize,"%s: %s\r\n",h->first.c_str(),h->second.c_str());
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handler.writeSize += Utils::snprintf(handler.writeBuf + handler.writeSize,sizeof(handler.writeBuf) - handler.writeSize,"\r\n");
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if ((requestBody)&&(requestBodyLength)) {
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if ((handler.writeSize + requestBodyLength) > sizeof(handler.writeBuf)) {
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responseBody = "request too large";
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return 0;
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}
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memcpy(handler.writeBuf + handler.writeSize,requestBody,requestBodyLength);
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handler.writeSize += requestBodyLength;
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}
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} catch ( ... ) {
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responseBody = "request too large";
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return 0;
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}
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handler.maxResponseSize = maxResponseSize;
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handler.responseHeaders = &responseHeaders;
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handler.responseBody = &responseBody;
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handler.error = false;
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handler.done = false;
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Phy<HttpPhyHandler *> phy(&handler,true,true);
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bool instantConnect = false;
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handler.phy = &phy;
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handler.sock = phy.tcpConnect((const struct sockaddr *)remoteAddress,instantConnect,(void *)0,true);
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if (!handler.sock) {
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responseBody = "connection failed (2)";
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return 0;
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}
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while (!handler.done) {
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phy.poll(timeout / 2);
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if ((timeout)&&((unsigned long)(OSUtils::now() - handler.lastActivity) > timeout)) {
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phy.close(handler.sock);
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responseBody = "timed out";
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return 0;
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}
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}
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return ((handler.error) ? 0 : ((handler.parser.http_errno != HPE_OK) ? 0 : handler.parser.status_code));
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} catch (std::exception &exc) {
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responseBody = exc.what();
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return 0;
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} catch ( ... ) {
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responseBody = "unknown exception";
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return 0;
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}
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}
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} // namespace ZeroTier
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