mirror of
https://github.com/radareorg/radare2.git
synced 2024-12-13 16:18:33 +00:00
404 lines
9.9 KiB
C
404 lines
9.9 KiB
C
/* radare - LGPL - Copyright 2008-2011 pancake<nopcode.org> */
|
|
|
|
#include "r_io.h"
|
|
#include "r_util.h"
|
|
#include <stdio.h>
|
|
|
|
// TODO: R_API int r_io_fetch(struct r_io_t *io, ut8 *buf, int len)
|
|
// --- check for EXEC perms in section (use cached read to accelerate)
|
|
|
|
R_API struct r_io_t *r_io_new() {
|
|
RIO *io = R_NEW (struct r_io_t);
|
|
if (!io) return NULL;
|
|
io->fd = NULL;
|
|
io->write_mask_fd = -1;
|
|
io->redirect = NULL;
|
|
io->printf = (void*) printf;
|
|
io->plugin = NULL;
|
|
io->raised = -1;
|
|
r_io_cache_init (io);
|
|
r_io_map_init (io);
|
|
r_io_section_init (io);
|
|
r_io_plugin_init (io);
|
|
r_io_desc_init (io);
|
|
r_io_undo_init (io);
|
|
return io;
|
|
}
|
|
|
|
R_API void r_io_raise(RIO *io, int fd) {
|
|
io->raised = fd;
|
|
}
|
|
|
|
R_API int r_io_is_listener(RIO *io) {
|
|
if (io && io->plugin && io->plugin->listener)
|
|
return io->plugin->listener (io->fd);
|
|
return R_FALSE;
|
|
}
|
|
|
|
R_API RBuffer *r_io_read_buf(struct r_io_t *io, ut64 addr, int len) {
|
|
RBuffer *b = R_NEW (RBuffer);
|
|
b->buf = malloc (len);
|
|
len = r_io_read_at (io, addr, b->buf, len);
|
|
b->length = (len<0)?0:len;
|
|
return b;
|
|
}
|
|
|
|
R_API int r_io_write_buf(struct r_io_t *io, struct r_buf_t *b) {
|
|
return r_io_write_at(io, b->base, b->buf, b->length);
|
|
}
|
|
|
|
R_API struct r_io_t *r_io_free(struct r_io_t *io) {
|
|
/* TODO: properly free inner nfo */
|
|
free (io);
|
|
return NULL;
|
|
}
|
|
|
|
/* used by uri handler plugins */
|
|
R_API int r_io_redirect(struct r_io_t *io, const char *file) {
|
|
free (io->redirect);
|
|
io->redirect = file?strdup (file):NULL;
|
|
return 0;
|
|
}
|
|
|
|
R_API RIODesc *r_io_open_as(struct r_io_t *io, const char *urihandler, const char *file, int flags, int mode) {
|
|
RIODesc *ret;
|
|
char *uri;
|
|
int urilen = strlen (urihandler);
|
|
uri = malloc (strlen (urihandler)+strlen (file)+5);
|
|
if (uri == NULL)
|
|
return NULL;
|
|
if (urilen>0)
|
|
sprintf (uri, "%s://", urihandler);
|
|
else *uri = '\0';
|
|
strcpy (uri+urilen, file);
|
|
ret = r_io_open (io, uri, flags, mode);
|
|
free (uri);
|
|
return ret;
|
|
}
|
|
|
|
R_API RIODesc *r_io_open(struct r_io_t *io, const char *file, int flags, int mode) {
|
|
RIODesc *desc = NULL;
|
|
int fd = -2;
|
|
char *uri = strdup (file);
|
|
struct r_io_plugin_t *plugin;
|
|
if (io != NULL) {
|
|
for (;;) {
|
|
plugin = r_io_plugin_resolve (io, uri);
|
|
if (plugin && plugin->open) {
|
|
desc = plugin->open (io, uri, flags, mode);
|
|
if (io->redirect) {
|
|
free ((void *)uri);
|
|
uri = strdup (io->redirect);
|
|
r_io_redirect (io, NULL);
|
|
continue;
|
|
}
|
|
if (desc != NULL) {
|
|
r_io_desc_add (io, desc);
|
|
fd = desc->fd;
|
|
if (fd != -1)
|
|
r_io_plugin_open (io, fd, plugin);
|
|
if (desc != io->fd)
|
|
io->plugin = plugin;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (fd == -2) {
|
|
#if __WINDOWS__
|
|
if (flags & R_IO_WRITE) {
|
|
fd = open (file, 1);
|
|
if (fd == -1)
|
|
creat (file, 0);
|
|
fd = open (file, 1);
|
|
} else fd = open (file, 0);
|
|
#else
|
|
fd = open (file, (flags&R_IO_WRITE)?O_RDWR:O_RDONLY, mode);
|
|
#endif
|
|
}
|
|
if (fd >= 0) {
|
|
if (desc == NULL)
|
|
desc = r_io_desc_new (io->plugin, fd, file, flags, mode, NULL);
|
|
r_io_desc_add (io, desc);
|
|
r_io_set_fd (io, desc);
|
|
}
|
|
free ((void *)uri);
|
|
return desc;
|
|
}
|
|
|
|
R_API int r_io_set_fd(RIO *io, RIODesc *fd) {
|
|
if (fd != NULL) {
|
|
io->fd = fd;
|
|
io->plugin = fd->plugin;
|
|
return R_TRUE;
|
|
}
|
|
return R_FALSE;
|
|
}
|
|
|
|
R_API int r_io_set_fdn(RIO *io, int fd) {
|
|
if (fd != -1 && io->fd != NULL && fd != io->fd->fd) {
|
|
RIODesc *desc = r_io_desc_get (io, fd);
|
|
if (desc) {
|
|
io->fd = desc;
|
|
io->plugin = desc->plugin;
|
|
return R_TRUE;
|
|
}
|
|
}
|
|
return R_FALSE;
|
|
}
|
|
|
|
R_API int r_io_read(RIO *io, ut8 *buf, int len) {
|
|
ut64 off;
|
|
int ret;
|
|
if (io==NULL || io->fd == NULL)
|
|
return -1;
|
|
/* check section permissions */
|
|
if (io->enforce_rwx && !(r_io_section_get_rwx (io, io->off) & R_IO_READ))
|
|
return -1;
|
|
#if 0
|
|
if (io->cached) {
|
|
ret = r_io_cache_read (io, io->off, buf, len);
|
|
if (ret == len)
|
|
return len;
|
|
if (ret > 0) {
|
|
len -= ret;
|
|
buf += ret;
|
|
}
|
|
// partial reads
|
|
if (ret == len)
|
|
return len;
|
|
}
|
|
#endif
|
|
off = io->off;
|
|
ret = -1;
|
|
if (io->plugin && io->plugin->read) {
|
|
if (io->plugin->read != NULL)
|
|
ret = io->plugin->read (io, io->fd, buf, len);
|
|
else eprintf ("IO plugin for fd=%d has no read()\n", io->fd->fd);
|
|
} else ret = read (io->fd->fd, buf, len);
|
|
if (ret>0 && ret<len)
|
|
memset (buf+ret, 0xff, len-ret);
|
|
// this must be before?? r_io_cache_read (io, io->off, buf, len);
|
|
// eprintf ("--RET-- %llx\n", r_io_seek (io, off, R_IO_SEEK_SET));
|
|
|
|
return ret;
|
|
}
|
|
|
|
R_API int r_io_read_at(struct r_io_t *io, ut64 addr, ut8 *buf, int len) {
|
|
if (r_io_seek (io, addr, R_IO_SEEK_SET)==UT64_MAX) {
|
|
memset (buf, 0xff, len);
|
|
return -1;
|
|
}
|
|
return r_io_read (io, buf, len);
|
|
}
|
|
|
|
R_API ut64 r_io_read_i(struct r_io_t *io, ut64 addr, int sz, int endian) {
|
|
ut64 ret = 0LL;
|
|
int err;
|
|
ut8 buf[8];
|
|
if (sz > 8) sz = 8;
|
|
if (sz < 0) sz = 1;
|
|
err = r_io_read_at (io, addr, buf, sz);
|
|
if (err == sz) r_mem_copyendian ((ut8*)&ret, buf, sz, endian);
|
|
else return -1;
|
|
//else perror("Cannot read");
|
|
return ret;
|
|
}
|
|
|
|
R_API int r_io_resize(struct r_io_t *io, ut64 newsize) {
|
|
if (io->plugin && io->plugin->resize)
|
|
return io->plugin->resize (io, io->fd, newsize);
|
|
else ftruncate (io->fd->fd, newsize);
|
|
return R_FALSE;
|
|
}
|
|
|
|
R_API int r_io_set_write_mask(struct r_io_t *io, const ut8 *buf, int len) {
|
|
int ret = R_FALSE;
|
|
if (len) {
|
|
io->write_mask_fd = io->fd->fd;
|
|
io->write_mask_buf = (ut8 *)malloc (len);
|
|
memcpy (io->write_mask_buf, buf, len);
|
|
io->write_mask_len = len;
|
|
ret = R_TRUE;
|
|
} else io->write_mask_fd = -1;
|
|
return ret;
|
|
}
|
|
|
|
R_API int r_io_write(struct r_io_t *io, const ut8 *buf, int len) {
|
|
int i, ret = -1;
|
|
ut8 *data = NULL;
|
|
|
|
/* check section permissions */
|
|
if (io->enforce_rwx && !(r_io_section_get_rwx (io, io->off) & R_IO_WRITE))
|
|
return -1;
|
|
|
|
if (io->cached) {
|
|
ret = r_io_cache_write (io, io->off, buf, len);
|
|
if (ret == len)
|
|
return len;
|
|
if (ret > 0) {
|
|
len -= ret;
|
|
buf += ret;
|
|
}
|
|
}
|
|
|
|
/* TODO: implement IO cache here. to avoid dupping work on vm for example */
|
|
|
|
/* apply write binary mask */
|
|
if (io->write_mask_fd != -1) {
|
|
data = malloc (len);
|
|
r_io_seek (io, io->off, R_IO_SEEK_SET);
|
|
r_io_read (io, data, len);
|
|
r_io_seek (io, io->off, R_IO_SEEK_SET);
|
|
for (i=0; i<len; i++)
|
|
data[i] = buf[i] & \
|
|
io->write_mask_buf[i%io->write_mask_len];
|
|
buf = data;
|
|
}
|
|
|
|
|
|
r_io_map_select(io,io->off);
|
|
|
|
if (io->plugin) {
|
|
if (io->plugin->write)
|
|
ret = io->plugin->write (io, io->fd, buf, len);
|
|
else eprintf ("r_io_write: io handler with no write callback\n");
|
|
} else ret = write (io->fd->fd, buf, len);
|
|
|
|
if (ret == -1)
|
|
eprintf ("r_io_write: cannot write on fd %d\n", io->fd->fd);
|
|
|
|
if (data)
|
|
free (data);
|
|
return ret;
|
|
}
|
|
|
|
R_API int r_io_write_at(struct r_io_t *io, ut64 addr, const ut8 *buf, int len) {
|
|
if (r_io_seek (io, addr, R_IO_SEEK_SET)<0)
|
|
return -1;
|
|
return r_io_write (io, buf, len);
|
|
}
|
|
|
|
R_API ut64 r_io_seek(struct r_io_t *io, ut64 offset, int whence) {
|
|
int posix_whence = SEEK_SET;
|
|
ut64 ret = -1;
|
|
switch (whence) {
|
|
case R_IO_SEEK_SET:
|
|
posix_whence = SEEK_SET;
|
|
ret = offset;
|
|
break;
|
|
case R_IO_SEEK_CUR:
|
|
// offset += io->off;
|
|
posix_whence = SEEK_CUR;
|
|
ret = offset+io->off;
|
|
break;
|
|
case R_IO_SEEK_END:
|
|
//offset = UT64_MAX; // XXX: depending on io bits?
|
|
ret = UT64_MAX;
|
|
posix_whence = SEEK_END;
|
|
break;
|
|
}
|
|
if (io == NULL)
|
|
return ret;
|
|
// XXX: list_empty trick must be done in r_io_set_va();
|
|
offset = (!io->debug && io->va && !r_list_empty (io->sections))?
|
|
r_io_section_vaddr_to_offset (io, offset) : offset;
|
|
// if resolution fails... just return as invalid address
|
|
if (offset==UT64_MAX)
|
|
return UT64_MAX;
|
|
// TODO: implement io->enforce_seek here!
|
|
if (io->fd != NULL) {
|
|
if (io->plugin && io->plugin->lseek)
|
|
ret = io->plugin->lseek (io, io->fd, offset, whence);
|
|
// XXX can be problematic on w32..so no 64 bit offset?
|
|
else ret = lseek (io->fd->fd, offset, posix_whence);
|
|
if (ret != -1) {
|
|
io->off = ret;
|
|
// XXX this can be tricky.. better not to use this .. must be deprecated
|
|
// r_io_sundo_push (io);
|
|
ret = (!io->debug && io->va && !r_list_empty (io->sections))?
|
|
r_io_section_offset_to_vaddr (io, io->off) : io->off;
|
|
} //else eprintf ("r_io_seek: cannot seek to %"PFMT64x"\n", offset);
|
|
} //else { eprintf ("r_io_seek: null fd\n"); }
|
|
return ret;
|
|
}
|
|
|
|
R_API ut64 r_io_size(RIO *io) {
|
|
ut64 size, here;
|
|
if (r_io_is_listener (io))
|
|
return UT64_MAX;
|
|
//r_io_set_fdn (io, fd);
|
|
here = r_io_seek (io, 0, R_IO_SEEK_CUR);
|
|
size = r_io_seek (io, 0, R_IO_SEEK_END);
|
|
r_io_seek (io, here, R_IO_SEEK_SET);
|
|
return size;
|
|
}
|
|
|
|
R_API int r_io_system(RIO *io, const char *cmd) {
|
|
int ret = -1;
|
|
if (io->plugin && io->plugin->system)
|
|
ret = io->plugin->system (io, io->fd, cmd);
|
|
return ret;
|
|
}
|
|
|
|
// TODO: remove int fd here???
|
|
R_API int r_io_close(struct r_io_t *io, RIODesc *fd) {
|
|
if (io == NULL || fd == NULL)
|
|
return -1;
|
|
int nfd = fd->fd;
|
|
if (r_io_set_fd (io, fd)) {
|
|
RIODesc *desc = r_io_desc_get (io, fd->fd);
|
|
if (desc) {
|
|
r_io_map_del (io, fd->fd);
|
|
r_io_plugin_close (io, fd->fd, io->plugin);
|
|
if (io->plugin && io->plugin->close)
|
|
return io->plugin->close (desc);
|
|
r_io_desc_del (io, desc->fd);
|
|
}
|
|
}
|
|
io->fd = NULL; // unset current fd
|
|
return close (nfd);
|
|
}
|
|
|
|
R_API int r_io_bind(RIO *io, RIOBind *bnd) {
|
|
bnd->io = io;
|
|
bnd->init = R_TRUE;
|
|
bnd->read_at = r_io_read_at;
|
|
bnd->write_at = r_io_write_at;
|
|
//bnd->fd = io->fd;// do we need to store ptr to fd??
|
|
return R_TRUE;
|
|
}
|
|
|
|
R_API int r_io_accept(RIO *io, int fd) {
|
|
if (r_io_is_listener (io) && (io->plugin->accept))
|
|
return io->plugin->accept (io, io->fd, fd);
|
|
return R_FALSE;
|
|
}
|
|
|
|
/* moves bytes up (+) or down (-) within the specified range */
|
|
R_API int r_io_shift(RIO *io, ut64 start, ut64 end, st64 move) {
|
|
ut8 *buf;
|
|
ut64 chunksize = 0x10000;
|
|
ut64 rest, src, shiftsize = r_num_abs (move);
|
|
if (!shiftsize || (end-start) <= shiftsize) return R_FALSE;
|
|
rest = (end-start) - shiftsize;
|
|
|
|
if (!(buf = malloc (chunksize))) return R_FALSE;
|
|
|
|
if (move>0) src = end-shiftsize;
|
|
else src = start+shiftsize;
|
|
|
|
while (rest>0) {
|
|
if (chunksize>rest) chunksize=rest;
|
|
if (move>0) src -= chunksize;
|
|
|
|
r_io_read_at (io, src, buf, chunksize);
|
|
r_io_write_at (io, src+move, buf, chunksize);
|
|
|
|
if (move<0) src += chunksize;
|
|
rest -= chunksize;
|
|
}
|
|
free (buf);
|
|
return R_TRUE;
|
|
}
|