mirror of
https://github.com/EQEmu/Server.git
synced 2026-04-03 00:52:25 +00:00
7ab909ee47
- License was intended to be GPLv3 per earlier commit of GPLv3 LICENSE FILE - This is confirmed by the inclusion of libraries that are incompatible with GPLv2 - This is also confirmed by KLS and the agreement of KLS's predecessors - Added GPLv3 license headers to the compilable source files - Removed Folly licensing in strings.h since the string functions do not match the Folly functions and are standard functions - this must have been left over from previous implementations - Removed individual contributor license headers since the project has been under the "developer" mantle for many years - Removed comments on files that were previously automatically generated since they've been manually modified multiple times and there are no automatic scripts referencing them (removed in 2023)
452 lines
9.9 KiB
C++
452 lines
9.9 KiB
C++
/* EQEmu: EQEmulator
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Copyright (C) 2001-2026 EQEmu Development Team
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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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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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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 "packetfile.h"
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#include "common/eq_opcodes.h"
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#include "common/eq_packet_structs.h"
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#include "common/misc.h"
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#include <errno.h>
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#include <string.h>
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#include <time.h>
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#include <map>
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PacketFileWriter::PacketFileWriter(bool _force_flush) {
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out = NULL;
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force_flush = _force_flush;
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}
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PacketFileWriter::~PacketFileWriter() {
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CloseFile();
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}
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bool PacketFileWriter::SetPacketStamp(const char *name, uint32 stamp) {
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FILE *in;
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in = fopen(name, "r+b");
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if(in == NULL) {
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fprintf(stderr, "Error opening packet file '%s': %s\n", name, strerror(errno));
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return(false);
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}
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unsigned long magic = 0;
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if(fread(&magic, sizeof(magic), 1, in) != 1) {
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fprintf(stderr, "Error reading header from packet file: %s\n", strerror(errno));
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fclose(in);
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return(false);
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}
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PacketFileReader *ret = NULL;
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if(magic == OLD_PACKET_FILE_MAGIC) {
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OldPacketFileHeader *pos = 0;
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uint32 stamp_pos = (uint32) &pos->packet_file_stamp;
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fseek(in, stamp_pos, SEEK_SET);
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OldPacketFileHeader hdr;
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hdr.packet_file_stamp = stamp;
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if(fwrite(&hdr.packet_file_stamp, sizeof(hdr.packet_file_stamp), 1, in) != 1) {
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fprintf(stderr, "Error writting to packet file: %s\n", strerror(errno));
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fclose(in);
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return(false);
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}
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} else if(magic == PACKET_FILE_MAGIC) {
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PacketFileHeader *pos = 0;
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uint32 stamp_pos = (uint32) &pos->packet_file_stamp;
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fseek(in, stamp_pos, SEEK_SET);
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PacketFileHeader hdr;
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hdr.packet_file_stamp = stamp;
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if(fwrite(&hdr.packet_file_stamp, sizeof(hdr.packet_file_stamp), 1, in) != 1) {
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fprintf(stderr, "Error writting to packet file: %s\n", strerror(errno));
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fclose(in);
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return(false);
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}
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} else {
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fprintf(stderr, "Unknown packet file type 0x%.8x\n", magic);
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fclose(in);
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return(false);
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}
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fclose(in);
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return(true);
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}
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bool PacketFileWriter::OpenFile(const char *name) {
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CloseFile();
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printf("Opening packet file: %s\n", name);
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out = fopen(name, "wb");
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if(out == NULL) {
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fprintf(stderr, "Error opening packet file '%s': %s\n", name, strerror(errno));
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return(false);
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}
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PacketFileHeader head;
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head.packet_file_magic = PACKET_FILE_MAGIC;
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head.packet_file_version = PACKET_FILE_CURRENT_VERSION;
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head.packet_file_stamp = time(NULL);
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if(fwrite(&head, sizeof(head), 1, out) != 1) {
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fprintf(stderr, "Error writting header to packet file: %s\n", strerror(errno));
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fclose(out);
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return(false);
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}
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return(true);
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}
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void PacketFileWriter::CloseFile() {
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if(out != NULL) {
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fclose(out);
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out = NULL;
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printf("Closed packet file.\n");
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}
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}
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void PacketFileWriter::WritePacket(uint16 eq_op, uint32 packlen, const unsigned char *packet, bool to_server, const struct timeval &tv) {
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if(out == NULL)
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return;
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_WriteBlock(eq_op, packet, packlen, to_server, tv);
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/*
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Could log only the packets we care about, but this is most of the stream,
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so just log them all...
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switch(eq_op) {
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case OP_NewZone:
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case OP_ZoneSpawns:
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case OP_NewSpawn:
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case OP_MobUpdate:
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case OP_ClientUpdate:
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case OP_Death:
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case OP_DeleteSpawn:
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case OP_CastSpell:
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case OP_ShopRequest:
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case OP_ShopEndConfirm:
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case OP_ItemPacket:
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_WriteBlock(eq_op, packet, packlen);
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default:
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return;
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}
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*/
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}
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bool PacketFileWriter::_WriteBlock(uint16 eq_op, const void *d, uint16 len, bool to_server, const struct timeval &tv) {
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if(out == NULL)
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return(false);
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PacketFileSection s;
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s.opcode = eq_op;
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s.len = len;
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s.tv_sec = tv.tv_sec;
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s.tv_msec = tv.tv_usec/1000;
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if(to_server)
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SetToServer(s);
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else
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SetToClient(s);
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if(fwrite(&s, sizeof(s), 1, out) != 1) {
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fprintf(stderr, "Error writting block header: %s\n", strerror(errno));
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return(false);
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}
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if(fwrite(d, 1, len, out) != len) {
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fprintf(stderr, "Error writting block body: %s\n", strerror(errno));
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return(false);
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}
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if(force_flush)
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fflush(out);
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return(true);
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}
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PacketFileReader *PacketFileReader::OpenPacketFile(const char *name) {
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FILE *in;
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in = fopen(name, "rb");
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if(in == NULL) {
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fprintf(stderr, "Error opening packet file '%s': %s\n", name, strerror(errno));
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return(NULL);
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}
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unsigned long magic = 0;
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if(fread(&magic, sizeof(magic), 1, in) != 1) {
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fprintf(stderr, "Error reading header to packet file: %s\n", strerror(errno));
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fclose(in);
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return(NULL);
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}
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PacketFileReader *ret = NULL;
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if(magic == OLD_PACKET_FILE_MAGIC) {
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ret = new OldPacketFileReader();
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} else if(magic == PACKET_FILE_MAGIC) {
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ret = new NewPacketFileReader();
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} else {
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fprintf(stderr, "Unknown packet file type 0x%.8x\n", magic);
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fclose(in);
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return(NULL);
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}
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if(!ret->OpenFile(name)) {
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safe_delete(ret);
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return(NULL);
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}
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return(ret);
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}
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PacketFileReader::PacketFileReader() {
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packet_file_stamp = 0;
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}
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OldPacketFileReader::OldPacketFileReader()
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: PacketFileReader()
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{
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in = NULL;
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}
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OldPacketFileReader::~OldPacketFileReader() {
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CloseFile();
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}
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bool OldPacketFileReader::OpenFile(const char *name) {
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CloseFile();
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in = fopen(name, "rb");
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if(in == NULL) {
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fprintf(stderr, "Error opening packet file '%s': %s\n", name, strerror(errno));
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return(false);
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}
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OldPacketFileHeader head;
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if(fread(&head, sizeof(head), 1, in) != 1) {
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fprintf(stderr, "Error reading header to packet file: %s\n", strerror(errno));
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fclose(in);
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return(false);
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}
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if(head.packet_file_magic != OLD_PACKET_FILE_MAGIC) {
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fclose(in);
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if(head.packet_file_magic > (OLD_PACKET_FILE_MAGIC)) {
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fprintf(stderr, "Error: this is a build file, not a packet file, its allready processed!\n");
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} else {
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fprintf(stderr, "Error: this is not a packet file!\n");
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}
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return(false);
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}
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uint32 now = time(NULL);
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if(head.packet_file_stamp > now) {
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fprintf(stderr, "Error: invalid timestamp in file. Your clock or the collector's is wrong (%d sec ahead).\n", head.packet_file_stamp-now);
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fclose(in);
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return(false);
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}
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packet_file_stamp = head.packet_file_stamp;
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return(true);
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}
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void OldPacketFileReader::CloseFile() {
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if(in != NULL) {
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fclose(in);
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in = NULL;
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}
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}
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bool OldPacketFileReader::ResetFile() {
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if(in == NULL)
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return(false);
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rewind(in);
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//gotta read past the header again
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OldPacketFileHeader head;
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if(fread(&head, sizeof(head), 1, in) != 1) {
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return(false);
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}
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return(true);
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}
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bool OldPacketFileReader::ReadPacket(uint16 &eq_op, uint32 &packlen, unsigned char *packet, bool &to_server, struct timeval &tv) {
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if(in == NULL)
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return(false);
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if(feof(in))
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return(false);
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OldPacketFileSection s;
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if(fread(&s, sizeof(s), 1, in) != 1) {
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if(!feof(in))
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fprintf(stderr, "Error reading section header: %s\n", strerror(errno));
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return(false);
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}
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eq_op = s.opcode;
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if(packlen < s.len) {
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fprintf(stderr, "Packet buffer is too small! %d < %d, skipping\n", packlen, s.len);
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fseek(in, s.len, SEEK_CUR);
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return(false);
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}
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if(fread(packet, 1, s.len, in) != s.len) {
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if(feof(in))
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fprintf(stderr, "Error: EOF encountered when expecting packet data.\n");
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else
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fprintf(stderr, "Error reading packet body: %s\n", strerror(errno));
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return(false);
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}
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packlen = s.len;
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to_server = false;
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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return(true);
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}
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NewPacketFileReader::NewPacketFileReader()
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: PacketFileReader()
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{
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in = NULL;
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}
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NewPacketFileReader::~NewPacketFileReader() {
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CloseFile();
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}
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bool NewPacketFileReader::OpenFile(const char *name) {
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CloseFile();
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in = fopen(name, "rb");
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if(in == NULL) {
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fprintf(stderr, "Error opening packet file '%s': %s\n", name, strerror(errno));
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return(false);
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}
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PacketFileHeader head;
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if(fread(&head, sizeof(head), 1, in) != 1) {
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fprintf(stderr, "Error reading header to packet file: %s\n", strerror(errno));
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fclose(in);
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return(false);
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}
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if(head.packet_file_magic != PACKET_FILE_MAGIC) {
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fclose(in);
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if(head.packet_file_magic == (PACKET_FILE_MAGIC+1)) {
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fprintf(stderr, "Error: this is a build file, not a packet file, its allready processed!\n");
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} else {
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fprintf(stderr, "Error: this is not a packet file!\n");
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}
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return(false);
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}
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uint32 now = time(NULL);
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if(head.packet_file_stamp > now) {
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fprintf(stderr, "Error: invalid timestamp in file. Your clock or the collector's is wrong (%d sec ahead).\n", head.packet_file_stamp-now);
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fclose(in);
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return(false);
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}
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packet_file_stamp = head.packet_file_stamp;
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return(true);
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}
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void NewPacketFileReader::CloseFile() {
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if(in != NULL) {
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fclose(in);
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in = NULL;
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}
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}
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bool NewPacketFileReader::ResetFile() {
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if(in == NULL)
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return(false);
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rewind(in);
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//gotta read past the header again
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PacketFileHeader head;
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if(fread(&head, sizeof(head), 1, in) != 1) {
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return(false);
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}
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return(true);
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}
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bool NewPacketFileReader::ReadPacket(uint16 &eq_op, uint32 &packlen, unsigned char *packet, bool &to_server, struct timeval &tv) {
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if(in == NULL)
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return(false);
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if(feof(in))
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return(false);
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PacketFileSection s;
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if(fread(&s, sizeof(s), 1, in) != 1) {
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if(!feof(in))
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fprintf(stderr, "Error reading section header: %s\n", strerror(errno));
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return(false);
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}
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eq_op = s.opcode;
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if(packlen < s.len) {
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fprintf(stderr, "Packet buffer is too small! %d < %d, skipping\n", packlen, s.len);
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fseek(in, s.len, SEEK_CUR);
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return(false);
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}
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if(fread(packet, 1, s.len, in) != s.len) {
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if(feof(in))
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fprintf(stderr, "Error: EOF encountered when expecting packet data.\n");
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else
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fprintf(stderr, "Error reading packet body: %s\n", strerror(errno));
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return(false);
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}
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packlen = s.len;
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to_server = IsToServer(s);
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tv.tv_sec = s.tv_sec;
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tv.tv_usec = 1000*s.tv_msec;
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return(true);
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}
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