summaryrefslogtreecommitdiff
path: root/src/dynamic.cpp
blob: 2092d0f4ecbca73d780a4259ba893151bf4d33a9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
 * See: http://www.inspircd.org/wiki/index.php/Credits
 *
 * This program is free but copyrighted software; see
 *            the file COPYING for details.
 *
 * ---------------------------------------------------
 */

#include "configreader.h"
#include "dynamic.h"

#ifndef STATIC_LINK
#include <dlfcn.h>
#else
#include "modlist.h"
#endif

#include "inspircd.h"

DLLManager::DLLManager(InspIRCd* ServerInstance, const char *fname)
{
	err = NULL;

	if (!strstr(fname,".so"))
	{
		err = "This doesn't look like a module file to me...";
		return;
	}
#ifdef STATIC_LINK
	this->staticname[0] = '\0';
	ServerInstance->Log(DEBUG,"Loading core-compiled module '%s'",fname);
	for (int j = 0; modsyms[j].name; j++)
	{
		ServerInstance->Log(DEBUG,"Check %s",modsyms[j].name);
		if (!strcmp(modsyms[j].name,fname))
		{
			ServerInstance->Log(DEBUG,"Found %s",fname);
			strlcpy(this->staticname,fname,1020);
			err = 0;
			return;
		}
	}
	err = "Module is not statically compiled into the ircd";
#else
	h = dlopen(fname, RTLD_NOW|RTLD_LOCAL);
	if (!h)
	{
		err = (char*)dlerror();
		ServerInstance->Log(DEBUG,"dlerror '%s' occured!", err);
		return;
	}

	ServerInstance->Log(DEBUG,"Finished loading '%s': %0x", fname, h);
#endif
}

DLLManager::~DLLManager()
{
#ifndef STATIC_LINK
	// close the library if it isn't null
	if (h)
		dlclose(h);
#endif
}



#ifdef STATIC_LINK

bool DLLManager::GetSymbol(initfunc* &v, const char *sym_name)
{
	for (int j = 0; modsyms[j].name; j++)
	{
		if (!strcmp(this->staticname,modsyms[j].name))
		{
			v = modsyms[j].value;
			err = 0;
			return true;
		}
	}
	err = "Module symbol missing from the core";
	return false;
}

#else

bool DLLManager::GetSymbol(void** v, const char* sym_name)
{
	// try extract a symbol from the library
	// get any error message is there is any
	
	if (h)
	{
		dlerror(); // clear value
		*v = dlsym(h, sym_name);
		err = (char*)dlerror();
		if (!*v || err)
			return false;
	}
	
	if (err)
	{
		return false;
	}
	else
	{	
		return true;
	}
}

#endif

DLLFactoryBase::DLLFactoryBase(InspIRCd* Instance, const char* fname, const char* symbol) : DLLManager(Instance, fname)
{
	// try get the factory function if there is no error yet
	factory_func = 0;
	
	if (!LastError())
	{
#ifdef STATIC_LINK
		if (!GetSymbol( factory_func, symbol ? symbol : "init_module"))
#else
		if (!GetSymbol( (void **)&factory_func, symbol ? symbol : "init_module"))
#endif
		{
			throw ModuleException("Missing init_module() entrypoint!");
		}
	}
}

DLLFactoryBase::~DLLFactoryBase()
{
}