/usr/src/lime-forensics-1.7.8-1/main.c is in lime-forensics-dkms 1.7.8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 | /*
* LiME - Linux Memory Extractor
* Copyright (c) 2011-2014 Joe Sylve - 504ENSICS Labs
*
*
* Author:
* Joe Sylve - joe.sylve@gmail.com, @jtsylve
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "lime.h"
// This file
static int write_lime_header(struct resource *);
static ssize_t write_padding(size_t);
static void write_range(struct resource *);
static ssize_t write_vaddr(void *, size_t);
static int setup(void);
static void cleanup(void);
static int init(void);
// External
extern int write_vaddr_tcp(void *, size_t);
extern int setup_tcp(void);
extern void cleanup_tcp(void);
extern int write_vaddr_disk(void *, size_t);
extern int setup_disk(void);
extern void cleanup_disk(void);
static char * format = 0;
static int mode = 0;
static int method = 0;
static char zero_page[PAGE_SIZE];
char * path = 0;
int dio = 0;
int port = 0;
int localhostonly = 0;
extern struct resource iomem_resource;
module_param(path, charp, S_IRUGO);
module_param(dio, int, S_IRUGO);
module_param(format, charp, S_IRUGO);
module_param(localhostonly, int, S_IRUGO);
#ifdef LIME_SUPPORTS_TIMING
long timeout = 1000;
module_param(timeout, long, S_IRUGO);
#endif
#define RETRY_IF_INTURRUPTED(f) ({ \
ssize_t err; \
do { err = f; } while(err == -EAGAIN || err == -EINTR); \
err; \
})
int init_module (void)
{
if(!path) {
DBG("No path parameter specified");
return -EINVAL;
}
if(!format) {
DBG("No format parameter specified");
return -EINVAL;
}
DBG("Parameters");
DBG(" PATH: %s", path);
DBG(" DIO: %u", dio);
DBG(" FORMAT: %s", format);
DBG(" LOCALHOSTONLY: %u", localhostonly);
#ifdef LIME_SUPPORTS_TIMING
DBG(" TIMEOUT: %lu", timeout);
#endif
memset(zero_page, 0, sizeof(zero_page));
if (!strcmp(format, "raw")) mode = LIME_MODE_RAW;
else if (!strcmp(format, "lime")) mode = LIME_MODE_LIME;
else if (!strcmp(format, "padded")) mode = LIME_MODE_PADDED;
else {
DBG("Invalid format parameter specified.");
return -EINVAL;
}
method = (sscanf(path, "tcp:%d", &port) == 1) ? LIME_METHOD_TCP : LIME_METHOD_DISK;
return init();
}
static int init() {
struct resource *p;
int err = 0;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
resource_size_t p_last = -1;
#else
__PTRDIFF_TYPE__ p_last = -1;
#endif
DBG("Initializing Dump...");
if((err = setup())) {
DBG("Setup Error");
cleanup();
return err;
}
for (p = iomem_resource.child; p ; p = p->sibling) {
if (strcmp(p->name, LIME_RAMSTR))
continue;
if (mode == LIME_MODE_LIME && (err = write_lime_header(p))) {
DBG("Error writing header 0x%lx - 0x%lx", (long) p->start, (long) p->end);
break;
} else if (mode == LIME_MODE_PADDED && (err = write_padding((size_t) ((p->start - 1) - p_last)))) {
DBG("Error writing padding 0x%lx - 0x%lx", (long) p_last, (long) p->start - 1);
break;
}
write_range(p);
p_last = p->end;
}
DBG("Memory Dump Complete...");
cleanup();
return err;
}
static int write_lime_header(struct resource * res) {
ssize_t s;
lime_mem_range_header header;
memset(&header, 0, sizeof(lime_mem_range_header));
header.magic = LIME_MAGIC;
header.version = 1;
header.s_addr = res->start;
header.e_addr = res->end;
s = write_vaddr(&header, sizeof(lime_mem_range_header));
if (s != sizeof(lime_mem_range_header)) {
DBG("Error sending header %zd", s);
return (int) s;
}
return 0;
}
static ssize_t write_padding(size_t s) {
size_t i = 0;
ssize_t r;
while(s -= i) {
i = min((size_t) PAGE_SIZE, s);
r = write_vaddr(zero_page, i);
if (r != i) {
DBG("Error sending zero page: %zd", r);
return r;
}
}
return 0;
}
static void write_range(struct resource * res) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
resource_size_t i, is;
#else
__PTRDIFF_TYPE__ i, is;
#endif
struct page * p;
void * v;
ssize_t s;
#ifdef LIME_SUPPORTS_TIMING
ktime_t start,end;
#endif
DBG("Writing range %llx - %llx.", res->start, res->end);
for (i = res->start; i <= res->end; i += is) {
#ifdef LIME_SUPPORTS_TIMING
start = ktime_get_real();
#endif
p = pfn_to_page((i) >> PAGE_SHIFT);
is = min((size_t) PAGE_SIZE, (size_t) (res->end - i + 1));
if (is < PAGE_SIZE) {
// We can't map partial pages and
// the linux kernel doesn't use them anyway
DBG("Padding partial page: vaddr %p size: %lu", (void *) i, (unsigned long) is);
write_padding(is);
} else {
v = kmap(p);
s = write_vaddr(v, is);
kunmap(p);
if (s < 0) {
DBG("Error writing page: vaddr %p ret: %zd. Null padding.", v, s);
write_padding(is);
} else if (s != is) {
DBG("Short Read %zu instead of %lu. Null padding.", s, (unsigned long) is);
write_padding(is - s);
}
}
#ifdef LIME_SUPPORTS_TIMING
end = ktime_get_real();
if (timeout > 0 && ktime_to_ms(ktime_sub(end, start)) > timeout) {
DBG("Reading is too slow. Skipping Range...");
write_padding(res->end - i + 1 - is);
break;
}
#endif
}
}
static ssize_t write_vaddr(void * v, size_t is) {
return RETRY_IF_INTURRUPTED(
(method == LIME_METHOD_TCP) ? write_vaddr_tcp(v, is) : write_vaddr_disk(v, is)
);
}
static int setup(void) {
return (method == LIME_METHOD_TCP) ? setup_tcp() : setup_disk();
}
static void cleanup(void) {
return (method == LIME_METHOD_TCP) ? cleanup_tcp() : cleanup_disk();
}
void cleanup_module(void)
{
}
MODULE_LICENSE("GPL");
|