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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <string.h>
#include <bscan/module.h>
#include <bscan/system.h>
struct _mods mods[MAX_MODULES];
/* modstructures not initialized */
int modcount = -1;
/*
#ifdef HAVE_DLSYM
#define MAKE_DLSYM(x, y) mods[modcount].##x = dlsym(handle, ##y);\
if ((error = dlerror()) != NULL) {\
fprintf(stderr, ##y":%s\n", error); return(1); }
#endif
*/
/* I think this is more correct, and also gets rid of some compile warnings.
* hope this doesn't break anything. -typo */
#ifdef HAVE_DLSYM
#define MAKE_DLSYM(x, y) mods[modcount].x = dlsym(handle, y);\
if ((error = dlerror()) != NULL) {\
fprintf(stderr, y":%s\n", error); return(1); }
#endif
/* SunOS 4.1.3 support */
#ifndef RTLD_NOW
#define RTLD_NOW 0x00001
#endif
/* OpenBSD support */
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0x00000
#endif
/* we really hate theo for this shit of dl* work */
#if defined(__OpenBSD__)
# if !(defined(__mips) || defined(__powerpc))
# define DLSYM_AOUT 1
# else
# define DLSYM_AOUT 0
# endif
#endif
#if DLSYM_AOUT == 1
# define DLSYM_UNDERSCORE "_"
#else
# define DLSYM_UNDERSCORE /**/
#endif
/*
* init the module structures. NOT the modules!
*/
void
init_modules ()
{
int c = 0;
while (c < MAX_MODULES)
{
mods[c].init = NULL;
mods[c].fini = NULL;
mods[c].musage = NULL;
mods[c].modname = NULL;
mods[c].modid = 0;
mods[c].modarg = NULL;
mods[c++].callmdl = NULL;
}
modcount = 0;
}
/*
* Load a module
* Return 0 on success, != 0 on error [no space left, EACCESS, ...]
*/
int
add_module (char *fname, char *modarg)
{
#ifdef HAVE_DLSYM
void *handle;
char *error;
if (modcount == -1)
init_modules ();
if (modcount >= MAX_MODULES)
return (2); /* array to small! */
handle = dlopen (fname, RTLD_NOW | RTLD_GLOBAL);
if ((error = dlerror ()) != NULL)
{
fprintf (stderr, "%s\n", error);
return (1);
}
MAKE_DLSYM (init, DLSYM_UNDERSCORE"init");
MAKE_DLSYM (fini, DLSYM_UNDERSCORE"fini");
MAKE_DLSYM (musage, DLSYM_UNDERSCORE"musage");
MAKE_DLSYM (callmdl, DLSYM_UNDERSCORE"callmdl");
mods[modcount].modid = modcount;
mods[modcount].modarg = modarg; /* not encoded arg */
modcount++;
#endif
return 0;
}
/*
* split a 'space seperated string' into many arguements
* decode esc-sequences
*/
void
split_margs (const char *moptarg, char ***margvp, int *margcp)
{
char *ptr, *opt;
int off;
char ch, ch2;
if (margcp == NULL)
return;
if (margvp == NULL)
return;
if (moptarg == NULL)
return;
moptarg = strdup(moptarg);
/*
* convert " modname -a arg1 -b arg2" to
* "modname -a arg1 -b arg2"
*/
opt = (char *) calloc (1, strlen (moptarg) + 1);
off = 0;
ch2 = ' ';
ptr = (char *) moptarg;
while ((ch = *ptr++) != '\0')
{
if ((ch == ' ') && (ch2 == ' '))
continue;
opt[off++] = ch;
ch2 = ch;
}
if (ch2 == ' ')
opt[off - 1] = '\0';
/*
* split argument-string into char *argv[] array
*/
*margcp = 0;
while ((ptr = strchr (opt, ' ')) != NULL)
{
*ptr++ = '\0';
(*margvp) = realloc (*margvp, ((*margcp) + 1) * sizeof (char *));
ctoreal(opt, opt); /* decode esc-sequences */
*(*margvp + *margcp) = opt;
(*margcp)++;
opt = ptr;
}
(*margvp) = realloc (*margvp, ((*margcp) + 2) * sizeof (char *));
ctoreal(opt, opt);
*(*margvp + (*margcp)++) = opt;
*(*margvp + (*margcp)) = NULL; /* terminate the array */
}
/*
* load and init the module.
* this function can exit
* return 0 on success
*/
int
loadinit_mod(char *optar)
{
char **margv = NULL;
int margc = 0;
extern int optind;
extern struct _opt *opt;
split_margs (optar, &margv, &margc);
if (add_module (margv[0], optar) == 0)
{
int oldoptind = optind;
int m = modcount - 1;
optind = 1;
if (mods[m].init ((char **) &mods[m].modname, margc, margv, opt) != 0)
{
fprintf (stderr, "- [%d]: '%s' init FAILED\n",
mods[m].modid, margv[0]);
mods[m].musage ();
exit (-1);
} else
fprintf (stderr, "+ [%d]: '%s' initialized\n",
mods[m].modid, mods[m].modname);
optind = oldoptind; /* restore old optind value */
} else
{
fprintf (stderr, "+ [-]; '%s' failed\n", optar);
exit (-1);
}
return(0);
}
|
