/usr/src/lime-forensics-1.7.2-1/tcp.c is in lime-forensics-dkms 1.7.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* 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 <linux/kernel.h>
#include <linux/device.h>
#include <linux/highmem.h>
#include <linux/pfn.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/string.h>
#include <net/sock.h>
#include <net/tcp.h>
#include "lime.h"
ssize_t write_vaddr_tcp(void *, size_t);
int setup_tcp(void);
void cleanup_tcp(void);
extern int port;
extern int localhostonly;
static struct socket *control;
static struct socket *accept;
int setup_tcp() {
struct sockaddr_in saddr;
int r;
mm_segment_t fs;
int buffsize = PAGE_SIZE;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0)
r = sock_create_kern(&init_net, AF_INET, SOCK_STREAM, IPPROTO_TCP, &control);
#elif LINUX_VERSION_CODE > KERNEL_VERSION(2,6,5)
r = sock_create_kern(AF_INET, SOCK_STREAM, IPPROTO_TCP, &control);
#else
r = sock_create(AF_INET, SOCK_STREAM, IPPROTO_TCP, &control);
#endif
if (r < 0) {
DBG("Error creating control socket");
return r;
}
memset(&saddr, 0, sizeof(saddr));
saddr.sin_family = AF_INET;
saddr.sin_port = htons(port);
if (localhostonly) {
saddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
} else {
saddr.sin_addr.s_addr = htonl(INADDR_ANY);
}
fs = get_fs();
set_fs(KERNEL_DS);
sock_setsockopt(control, SOL_SOCKET, SO_SNDBUF, (void *) &buffsize, sizeof (int));
set_fs(fs);
if (r < 0) {
DBG("Error setting buffsize %d", r);
return r;
}
r = control->ops->bind(control,(struct sockaddr*) &saddr,sizeof(saddr));
if (r < 0) {
DBG("Error binding control socket");
return r;
}
r = control->ops->listen(control,1);
if (r) {
DBG("Error listening on socket");
return r;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0)
r = sock_create_kern(&init_net, PF_INET, SOCK_STREAM, IPPROTO_TCP, &accept);
#elif LINUX_VERSION_CODE > KERNEL_VERSION(2,6,5)
r = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &accept);
#else
r = sock_create(PF_INET, SOCK_STREAM, IPPROTO_TCP, &accept);
#endif
if (r < 0) {
DBG("Error creating accept socket");
return r;
}
r = accept->ops->accept(control,accept,0);
if (r < 0) {
DBG("Error accepting socket");
return r;
}
return 0;
}
void cleanup_tcp() {
if (accept && accept->ops) {
accept->ops->shutdown(accept, 0);
accept->ops->release(accept);
}
if (control && control->ops) {
control->ops->shutdown(control, 0);
control->ops->release(control);
}
}
ssize_t write_vaddr_tcp(void * v, size_t is) {
ssize_t s;
struct kvec iov;
struct msghdr msg;
memset(&iov, 0, sizeof(struct iovec));
memset(&msg, 0, sizeof(struct msghdr));
iov.iov_base = v;
iov.iov_len = is;
s = kernel_sendmsg(accept, &msg, &iov, 1, is);
return s;
}
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