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update the checksum plugin to use the plugin config api

This commit is contained in:
Berke Viktor 2012-01-20 18:02:55 +01:00
parent a850ae6e4d
commit 83b6f548ad
1 changed files with 52 additions and 137 deletions
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193
plugins/checksum/checksum.c
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@ -1,5 +1,5 @@
/* XChat-WDK /* XChat-WDK
* Copyright (c) 2010-2011 Berke Viktor. * Copyright (c) 2010-2012 Berke Viktor.
* *
* Permission is hereby granted, free of charge, to any person obtaining a copy * Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal * of this software and associated documentation files (the "Software"), to deal
@ -31,8 +31,7 @@
#include "xchat-plugin.h" #include "xchat-plugin.h"
#define BUFSIZE 32768 #define BUFSIZE 32768
#define DEFAULT_MAX_HASH_SIZE 268435456 /* default size is 256 MB */ #define DEFAULT_LIMIT 256 /* default size is 256 MiB */
#define FILE_BUF_SIZE 512
#ifndef snprintf #ifndef snprintf
#define snprintf _snprintf #define snprintf _snprintf
@ -44,8 +43,7 @@
static xchat_plugin *ph; /* plugin handle */ static xchat_plugin *ph; /* plugin handle */
static const char name[] = "Checksum"; static const char name[] = "Checksum";
static const char desc[] = "Calculate checksum for DCC file transfers"; static const char desc[] = "Calculate checksum for DCC file transfers";
static const char version[] = "2.0"; static const char version[] = "3.0";
static int config_fail; /* variable for config availability */
/* Use of OpenSSL SHA256 interface: http://adamlamers.com/?p=5 */ /* Use of OpenSSL SHA256 interface: http://adamlamers.com/?p=5 */
static void static void
@ -114,135 +112,46 @@ sha256_file (char *path, char outputBuffer[65])
} }
static void static void
init () set_limit (char* size)
{ {
/* check whether the config file exists, if it doesn't, try to create it */ int buffer = atoi (size);
FILE * file_in;
FILE * file_out;
char buffer[FILE_BUF_SIZE];
config_fail = 0; if (buffer > 0 && buffer < INT_MAX)
snprintf (buffer, sizeof (buffer), "%s/checksum.conf", xchat_get_info (ph, "xchatdirfs"));
if ((file_in = fopen (buffer, "r")) == NULL)
{ {
if ((file_out = fopen (buffer, "w")) == NULL) if (xchat_pluginpref_set_int (ph, "limit", buffer))
{ {
config_fail = 1; xchat_printf (ph, "File size limit has successfully been set to: %d MiB\n", buffer);
} else
{
fprintf (file_out, "%llu\n", (unsigned long long) DEFAULT_MAX_HASH_SIZE);
fclose (file_out);
} }
} else else
{ {
fclose (file_in); xchat_printf (ph, "File access error while saving!\n");
}
}
else
{
xchat_printf (ph, "Invalid input!\n");
}
} }
/* nasty easter egg: if FILE_BUF_SIZE is set to 1024 and you build for x86, you can do fclose () static int
at the end of init (), which is plain wrong as it will only work if fopen () != 0. */ get_limit ()
{
int size = xchat_pluginpref_get_int (ph, "limit");
if (size <= -1 || size >= INT_MAX)
{
return DEFAULT_LIMIT;
} }
else
static unsigned long long
get_max_hash_size ()
{ {
FILE * file_in; return size;
char buffer[FILE_BUF_SIZE];
unsigned long long max_hash_size;
if (config_fail)
{
return (unsigned long long) DEFAULT_MAX_HASH_SIZE;
} else
{
snprintf (buffer, sizeof (buffer), "%s/checksum.conf", xchat_get_info (ph, "xchatdirfs"));
file_in = fopen (buffer, "r");
fscanf (file_in, "%llu", &max_hash_size);
fclose (file_in);
return max_hash_size;
} }
} }
static void static void
print_size () print_limit ()
{ {
unsigned long long size; xchat_printf (ph, "File size limit for checksums: %d MiB", get_limit ());
char suffix[3];
size = get_max_hash_size ();
if (size >= 1073741824)
{
size /= 1073741824;
snprintf (suffix, sizeof (suffix), "GB");
} else if (size >= 1048576)
{
size /= 1048576;
snprintf (suffix, sizeof (suffix), "MB");
} else if (size >= 1024)
{
size /= 1024;
snprintf (suffix, sizeof (suffix), "kB");
} else
{
snprintf (suffix, sizeof (suffix), "B");
}
xchat_printf (ph, "File size limit for checksums: %llu %s\n", size, suffix);
}
static void
increase_max_hash_size ()
{
unsigned long long size;
FILE * file_out;
char buffer[FILE_BUF_SIZE];
if (config_fail)
{
xchat_printf (ph, "Config file is unavailable, falling back to the default value\n");
print_size ();
} else
{
size = get_max_hash_size ();
if (size <= ULLONG_MAX/2)
{
size *= 2;
}
snprintf (buffer, sizeof (buffer), "%s/checksum.conf", xchat_get_info (ph, "xchatdirfs"));
file_out = fopen (buffer, "w");
fprintf (file_out, "%llu\n", size);
fclose (file_out);
print_size ();
}
}
static void
decrease_max_hash_size ()
{
unsigned long long size;
FILE * file_out;
char buffer[FILE_BUF_SIZE];
if (config_fail)
{
xchat_printf (ph, "Config file is unavailable, falling back to the default value\n");
print_size ();
} else
{
size = get_max_hash_size ();
if (size >= 2)
{
size /= 2;
}
snprintf (buffer, sizeof (buffer), "%s/checksum.conf", xchat_get_info (ph, "xchatdirfs"));
file_out = fopen (buffer, "w");
fprintf (file_out, "%llu\n", size);
fclose (file_out);
print_size ();
}
} }
static int static int
@ -255,20 +164,22 @@ dccrecv_cb (char *word[], void *userdata)
result = stat64 (word[2], &buffer); result = stat64 (word[2], &buffer);
if (result == 0) /* stat returns 0 on success */ if (result == 0) /* stat returns 0 on success */
{ {
if (buffer.st_size <= get_max_hash_size ()) if (buffer.st_size <= (unsigned long long) get_limit () * 1048576)
{ {
sha256_file (word[2], sum); /* word[2] is the full filename */ sha256_file (word[2], sum); /* word[2] is the full filename */
/* try to print the checksum in the privmsg tab of the sender */ /* try to print the checksum in the privmsg tab of the sender */
xchat_set_context (ph, xchat_find_context (ph, NULL, word[3])); xchat_set_context (ph, xchat_find_context (ph, NULL, word[3]));
xchat_printf (ph, "SHA-256 checksum for %s (local): %s\n", word[1], sum); xchat_printf (ph, "SHA-256 checksum for %s (local): %s\n", word[1], sum);
} else }
else
{ {
xchat_set_context (ph, xchat_find_context (ph, NULL, word[3])); xchat_set_context (ph, xchat_find_context (ph, NULL, word[3]));
xchat_printf (ph, "SHA-256 checksum for %s (local): (size limit reached, no checksum calculated, you can increase it with /CHECKSUM INC)\n", word[1]); xchat_printf (ph, "SHA-256 checksum for %s (local): (size limit reached, no checksum calculated, you can increase it with /CHECKSUM INC)\n", word[1]);
} }
} else }
else
{ {
xchat_printf (ph, "File access error\n"); xchat_printf (ph, "File access error!\n");
} }
return XCHAT_EAT_NONE; return XCHAT_EAT_NONE;
@ -284,18 +195,20 @@ dccoffer_cb (char *word[], void *userdata)
result = stat64 (word[3], &buffer); result = stat64 (word[3], &buffer);
if (result == 0) /* stat returns 0 on success */ if (result == 0) /* stat returns 0 on success */
{ {
if (buffer.st_size <= get_max_hash_size ()) if (buffer.st_size <= (unsigned long long) get_limit () * 1048576)
{ {
sha256_file (word[3], sum); /* word[3] is the full filename */ sha256_file (word[3], sum); /* word[3] is the full filename */
xchat_commandf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): %s", word[2], word[1], sum); xchat_commandf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): %s", word[2], word[1], sum);
} else }
else
{ {
xchat_set_context (ph, xchat_find_context (ph, NULL, word[3])); xchat_set_context (ph, xchat_find_context (ph, NULL, word[3]));
xchat_printf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): (size limit reached, no checksum calculated)", word[2], word[1]); xchat_printf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): (size limit reached, no checksum calculated)", word[2], word[1]);
} }
} else }
else
{ {
xchat_printf (ph, "File access error\n"); xchat_printf (ph, "File access error!\n");
} }
return XCHAT_EAT_NONE; return XCHAT_EAT_NONE;
@ -306,19 +219,17 @@ checksum (char *word[], void *userdata)
{ {
if (!stricmp ("GET", word[2])) if (!stricmp ("GET", word[2]))
{ {
print_size (); print_limit ();
} else if (!stricmp ("INC", word[2])) }
else if (!stricmp ("SET", word[2]))
{ {
increase_max_hash_size (); set_limit (word[3]);
} else if (!stricmp ("DEC", word[2])) }
{ else
decrease_max_hash_size ();
} else
{ {
xchat_printf (ph, "Usage: /CHECKSUM GET|INC|DEC\n"); xchat_printf (ph, "Usage: /CHECKSUM GET|INC|DEC\n");
xchat_printf (ph, " GET - print the maximum file size to be hashed\n"); xchat_printf (ph, " GET - print the maximum file size (in MiB) to be hashed\n");
xchat_printf (ph, " INC - double the maximum file size to be hashed\n"); xchat_printf (ph, " SET <filesize> - set the maximum file size (in MiB) to be hashed\n");
xchat_printf (ph, " DEC - halve the maximum file size to be hashed\n");
} }
} }
@ -331,9 +242,13 @@ xchat_plugin_init (xchat_plugin *plugin_handle, char **plugin_name, char **plugi
*plugin_desc = desc; *plugin_desc = desc;
*plugin_version = version; *plugin_version = version;
init (); /* this is required for the very first run */
if (xchat_pluginpref_get_int (ph, "limit") == -1)
{
xchat_pluginpref_set_int (ph, "limit", DEFAULT_LIMIT);
}
xchat_hook_command (ph, "CHECKSUM", XCHAT_PRI_NORM, checksum, "Usage: /CHECKSUM GET|INC|DEC", 0); xchat_hook_command (ph, "CHECKSUM", XCHAT_PRI_NORM, checksum, "Usage: /CHECKSUM GET|SET", 0);
xchat_hook_print (ph, "DCC RECV Complete", XCHAT_PRI_NORM, dccrecv_cb, NULL); xchat_hook_print (ph, "DCC RECV Complete", XCHAT_PRI_NORM, dccrecv_cb, NULL);
xchat_hook_print (ph, "DCC Offer", XCHAT_PRI_NORM, dccoffer_cb, NULL); xchat_hook_print (ph, "DCC Offer", XCHAT_PRI_NORM, dccoffer_cb, NULL);