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// Main loop part of HaxServ
//
// Written by: Test_User <hax@andrewyu.org>
//
// This is free and unencumbered software released into the public
// domain.
//
// Anyone is free to copy, modify, publish, use, compile, sell, or
// distribute this software, either in source code form or as a compiled
// binary, for any purpose, commercial or non-commercial, and by any
// means.
//
// In jurisdictions that recognize copyright laws, the author or authors
// of this software dedicate any and all copyright interest in the
// software to the public domain. We make this dedication for the benefit
// of the public at large and to the detriment of our heirs and
// successors. We intend this dedication to be an overt act of
// relinquishment in perpetuity of all present and future rights to this
// software under copyright law.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#include <gnutls/gnutls.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "network.h"
#include "config.h"
#include "types.h"
#include "tls.h"
#include "types.h"
int main(void) {
initservernetwork();
struct string full_msg = {malloc(0), 0};
while (1) {
uint8_t data[512];
uint64_t new_len;
{
int len;
do {
len = gnutls_record_recv(session, data, 512);
} while (len == GNUTLS_E_AGAIN || len == GNUTLS_E_INTERRUPTED);
if (len < 0)
new_len = 0;
else
new_len = len;
}
if (new_len == 0) {
WRITES(1, STRING("Disconnected.\n"));
return 0;
}
uint8_t found = 0;
uint64_t msg_len;
for (uint64_t i = 0; i < new_len; i++) {
if (data[i] == '\n') {
found = 1;
msg_len = i + full_msg.len;
break;
}
}
void *tmp = realloc(full_msg.data, full_msg.len+new_len);
if (tmp == 0 && full_msg.len+new_len != 0) {
WRITES(2, STRING("OOM... currently just exiting bc there's no automatic reconnect in here yet, and the only sane solution to this is resyncing.\n"));
return 1;
}
full_msg.data = tmp;
memcpy(full_msg.data+full_msg.len, data, new_len);
full_msg.len += new_len;
if (!found)
continue;
while (1) {
WRITES(1, STRING("Recvd: "));
write(1, full_msg.data, msg_len+1); // +1: \n
uint64_t offset = 0;
while (offset < msg_len && full_msg.data[offset] == ' ')
offset++;
if (msg_len == offset) {
puts("Protocol violation: Empty message.");
return 2;
}
struct string source;
if (full_msg.data[0] == ':') {
source.data = full_msg.data + 1;
found = 0;
for (uint64_t i = offset + 1; i < msg_len; i++) {
if (full_msg.data[i] == ' ') {
found = 1;
offset = i + 1;
source.len = i - 1;
break;
}
}
if (!found || source.len + 1 == msg_len) {
puts("Protocol violation: Sender but no command.");
return 2;
}
} else {
source = (struct string){0};
offset = 0;
}
while (offset < msg_len && full_msg.data[offset] == ' ')
offset++;
if (offset == msg_len) {
puts("Protocol violation: No command.");
return 2;
}
struct string command;
command.data = full_msg.data+offset;
found = 0;
for (uint64_t i = offset; i < msg_len; i++) {
if (full_msg.data[i] == ' ') {
found = 1;
command.len = i - offset;
offset = i;
break;
}
}
if (!found) {
command.len = msg_len - offset;
offset = msg_len;
}
while (offset < msg_len && full_msg.data[offset] == ' ')
offset++;
uint64_t argc = 0;
uint64_t old_offset = offset;
if (offset < msg_len) {
while (offset < msg_len) {
if (full_msg.data[offset] == ':') {
argc++;
break;
}
while (offset < msg_len && full_msg.data[offset] != ' ')
offset++;
argc++;
while (offset < msg_len && full_msg.data[offset] == ' ')
offset++;
}
}
offset = old_offset;
struct string argv[argc];
if (offset < msg_len) {
uint64_t i = 0;
while (offset < msg_len) {
if (full_msg.data[offset] == ':') {
argv[i].data = full_msg.data+offset+1;
argv[i].len = msg_len - offset - 1;
break;
}
argv[i].data = full_msg.data+offset;
uint64_t start = offset;
while (offset < msg_len && full_msg.data[offset] != ' ')
offset++;
argv[i].len = offset - start;
while (offset < msg_len && full_msg.data[offset] == ' ')
offset++;
i++;
}
}
int (*func)(struct string source, uint64_t argc, struct string *argv) = get_table_index(network_commands, command);
if (func == 0) {
WRITES(2, STRING("WARNING: Command is unknown, ignoring...\n"));
} else {
write(1, "\n", 1);
int err = func(source, argc, argv);
if (err) {
WRITES(1, STRING("Disconnecting by result of the network command handler...\n"));
return 0;
}
}
write(1, "\n", 1);
memmove(full_msg.data, full_msg.data+msg_len+1, full_msg.len - msg_len - 1);
full_msg.len -= msg_len+1;
found = 0;
for (uint64_t i = 0; i < full_msg.len; i++) {
if (full_msg.data[i] == '\n') {
found = 1;
msg_len = i;
break;
}
}
if (found == 0) {
void *tmp = realloc(full_msg.data, full_msg.len);
if (tmp == 0 && full_msg.len != 0) {
puts("AAAAAAAAA (OOM shrinking allocated data?)");
return 1;
}
full_msg.data = tmp;
break;
}
}
}
return 0;
}
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