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| author |   Jason A. Donenfeld <Jason@zx2c4.com> | 2012-04-02 06:42:20 +0200 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2012-04-02 06:42:20 +0200 |
| commit | 3912533cc5eb204b09682d017c15a9ff2a984ee2 (patch) | |
| tree | 5f82f279d945554c765a7cf41315a23dd55ce465 | |
| parent | Print ip address. (diff) | |
| download | android-connect-blinker-3912533cc5eb204b09682d017c15a9ff2a984ee2.tar.xz android-connect-blinker-3912533cc5eb204b09682d017c15a9ff2a984ee2.zip | |
Implement proc aspect.
| -rw-r--r-- | inet-connect-hook.c | 58 |
1 files changed, 52 insertions, 6 deletions
diff --git a/inet-connect-hook.c b/inet-connect-hook.c index ea71144..3e2dda3 100644 --- a/inet-connect-hook.c +++ b/inet-connect-hook.c @@ -2,9 +2,22 @@ #include <linux/net.h> #include <linux/socket.h> #include <linux/in.h> +#include <linux/proc_fs.h> +#include <asm/uaccess.h> + + +#define PROC_BLINKER_PORT "blinker_port" +#define MAX_LENGTH 16 + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Jason A. Donenfeld"); +MODULE_DESCRIPTION("Android Screen Blinker"); extern struct proto_ops inet_stream_ops; +static struct proc_dir_entry *proc_blinker_port; +static unsigned int port; + static void disable_page_protection(void) { unsigned long value; @@ -28,20 +41,49 @@ int (*old_connect)(struct socket *sock, struct sockaddr *uaddr, int sockaddr_len int connect(struct socket *sock, struct sockaddr *uaddr, int sockaddr_len, int flags) { struct sockaddr_in *usin = (struct sockaddr_in *)uaddr; - unsigned char bytes[4]; - bytes[0] = (usin->sin_addr.s_addr >> 0) & 0xFF; - bytes[1] = (usin->sin_addr.s_addr >> 8) & 0xFF; - bytes[2] = (usin->sin_addr.s_addr >> 16) & 0xFF; - bytes[3] = (usin->sin_addr.s_addr >> 24) & 0xFF; - printk(KERN_ALERT "Hooked connect to: %d.%d.%d.%d", bytes[0], bytes[1], bytes[2], bytes[3]); + if (ntohl(usin->sin_addr.s_addr) == 2130706433 && ntohs(usin->sin_port) == port) { + printk(KERN_INFO "blinker: connected to the magic port %u\n", port); + //TODO: blink the screen + } return (*old_connect)(sock, uaddr, sockaddr_len, flags); } +int set_port(struct file *file, const char __user *ubuf, unsigned long count, void *data) +{ + char buf[MAX_LENGTH]; + printk(KERN_INFO "blinker: called set_port\n"); + memset(buf, 0, sizeof(buf)); + if (count > MAX_LENGTH) + count = MAX_LENGTH; + if (copy_from_user(&buf, ubuf, count)) + return -EFAULT; + sscanf(buf, "%u", &port); + return count; +} + +int get_port(char *page, char **start, off_t off, int count, int *eof, void *data) +{ + char buf[MAX_LENGTH]; + int len; + printk(KERN_INFO "blinker: called get_port\n"); + len = snprintf(buf, MAX_LENGTH, "%u\n", port); + memcpy(page, buf, len); + return len; +} static int init(void) { + proc_blinker_port = create_proc_entry(PROC_BLINKER_PORT, 0666, NULL); + proc_blinker_port->read_proc = get_port; + proc_blinker_port->write_proc = set_port; + printk(KERN_INFO "blinker: created /proc/blinker_port\n"); + old_connect = inet_stream_ops.connect; disable_page_protection(); inet_stream_ops.connect = connect; enable_page_protection(); + printk(KERN_INFO "blinker: remapped inet_stream_ops.connect\n"); + + port = 9191; + return 0; } static void exit(void) @@ -49,6 +91,10 @@ static void exit(void) disable_page_protection(); inet_stream_ops.connect = old_connect; enable_page_protection(); + printk(KERN_INFO "blinker: unremapped inet_stream_ops.connect\n"); + + remove_proc_entry(PROC_BLINKER_PORT, proc_blinker_port); + printk(KERN_INFO "blinker: removed /proc/blinker_port\n"); } module_init(init); module_exit(exit); |