mirror of
https://github.com/radareorg/radare2.git
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398 lines
9.2 KiB
C
398 lines
9.2 KiB
C
/* radare - MIT - Copyright 2011-2019 - pancake */
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#include <r_io.h>
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#include <r_lib.h>
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#include <r_core.h>
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#include <r_socket.h>
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#include <sys/types.h>
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// TODO: implement the rap API in r_socket ?
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#define RIORAP_FD(x) (((x)->data)?(((RIORap*)((x)->data))->client):NULL)
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#define RIORAP_IS_LISTEN(x) (((RIORap*)((x)->data))->listener)
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#define RIORAP_IS_VALID(x) ((x) && ((x)->data) && ((x)->plugin == &r_io_plugin_rap))
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static int __rap_write(RIO *io, RIODesc *fd, const ut8 *buf, int count) {
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RSocket *s = RIORAP_FD (fd);
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ut8 *tmp;
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int ret;
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if (count < 1) {
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return count;
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}
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// TOOD: if count > RMT_MAX iterate !
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if (count > RMT_MAX) {
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count = RMT_MAX;
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}
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if (!(tmp = (ut8 *)malloc (count + 5))) {
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eprintf ("__rap_write: malloc failed\n");
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return -1;
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}
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tmp[0] = RMT_WRITE;
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r_write_be32 (tmp + 1, count);
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memcpy (tmp + 5, buf, count);
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(void)r_socket_write (s, tmp, count + 5);
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r_socket_flush (s);
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if (r_socket_read (s, tmp, 5) != 5) { // TODO read_block?
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eprintf ("__rap_write: error\n");
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ret = -1;
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} else {
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ret = r_read_be32 (tmp + 1);
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if (!ret) {
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ret = -1;
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}
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}
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free (tmp);
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return ret;
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}
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static bool __rap_accept(RIO *io, RIODesc *desc, int fd) {
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RIORap *rap = desc->data;
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if (rap && desc && fd != -1) {
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rap->client = r_socket_new_from_fd (fd);
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return true;
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}
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return false;
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}
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static int __rap_read(RIO *io, RIODesc *fd, ut8 *buf, int count) {
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RSocket *s = RIORAP_FD (fd);
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int ret, i = (int)count;
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ut8 tmp[5];
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// XXX. if count is > RMT_MAX, just perform multiple queries
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if (count > RMT_MAX) {
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count = RMT_MAX;
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}
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// send
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tmp[0] = RMT_READ;
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r_write_be32 (tmp + 1, count);
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(void)r_socket_write (s, tmp, 5);
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r_socket_flush (s);
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// recv
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ret = r_socket_read_block (s, tmp, 5);
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if (ret != 5 || tmp[0] != (RMT_READ | RMT_REPLY)) {
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eprintf ("__rap_read: Unexpected rap read reply "
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"(%d=0x%02x) expected (%d=0x%02x)\n",
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ret, tmp[0], 2, (RMT_READ | RMT_REPLY));
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return -1;
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}
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i = r_read_at_be32 (tmp, 1);
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if (i > count) {
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eprintf ("__rap_read: Unexpected data size %d\n", i);
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return -1;
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}
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r_socket_read_block (s, buf, i);
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return count;
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}
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static int __rap_close(RIODesc *fd) {
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int ret = -1;
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if (RIORAP_IS_VALID (fd)) {
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if (RIORAP_FD (fd) != NULL) {
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RIORap *r = fd->data;
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if (r && fd->fd != -1) {
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if (r->fd) {
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(void)r_socket_close (r->fd);
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}
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if (r->client) {
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ret = r_socket_close (r->client);
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}
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R_FREE (r);
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}
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}
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} else {
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eprintf ("__rap_close: fdesc is not a r_io_rap plugin\n");
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}
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return ret;
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}
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static ut64 __rap_lseek(RIO *io, RIODesc *fd, ut64 offset, int whence) {
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RSocket *s = RIORAP_FD (fd);
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ut8 tmp[10];
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tmp[0] = RMT_SEEK;
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tmp[1] = (ut8)whence;
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r_write_be64 (tmp + 2, offset);
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(void)r_socket_write (s, &tmp, 10);
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r_socket_flush (s);
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int ret = r_socket_read_block (s, (ut8*)&tmp, 9);
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if (ret != 9 || tmp[0] != (RMT_SEEK | RMT_REPLY)) {
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// eprintf ("%d %d - %02x %02x %02x %02x %02x %02x %02x\n",
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// ret, whence, tmp[0], tmp[1], tmp[2], tmp[3], tmp[4], tmp[5], tmp[6]);
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eprintf ("Unexpected lseek reply\n");
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return -1;
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}
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return r_read_at_be64 (tmp, 1);
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}
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static bool __rap_plugin_open(RIO *io, const char *pathname, bool many) {
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return r_str_startswith (pathname, "rap://") || r_str_startswith (pathname, "raps://");
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}
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static RIODesc *__rap_open(RIO *io, const char *pathname, int rw, int mode) {
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int i, p, listenmode;
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char *file, *port;
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const char *ptr;
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RSocket *rap_fd;
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char buf[1024];
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RIORap *rior;
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if (!__rap_plugin_open (io, pathname, 0)) {
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return NULL;
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}
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bool is_ssl = (!strncmp (pathname, "raps://", 7));
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ptr = pathname + (is_ssl? 7: 6);
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if (!(port = strchr (ptr, ':'))) {
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eprintf ("rap: wrong uri\n");
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return NULL;
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}
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listenmode = (*ptr == ':');
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*port++ = 0;
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if (!*port) {
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return NULL;
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}
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p = atoi (port);
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if ((file = strchr (port + 1, '/'))) {
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*file = 0;
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file++;
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}
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if (r_sandbox_enable (0)) {
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eprintf ("sandbox: Cannot use network\n");
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return NULL;
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}
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if (listenmode) {
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if (p <= 0) {
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eprintf ("rap: cannot listen here. Try rap://:9999\n");
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return NULL;
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}
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//TODO: Handle ^C signal (SIGINT, exit); // ???
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eprintf ("rap: listening at port %s ssl %s\n", port, (is_ssl)?"on":"off");
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rior = R_NEW0 (RIORap);
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rior->listener = true;
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rior->client = rior->fd = r_socket_new (is_ssl);
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if (!rior->fd) {
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free (rior);
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return NULL;
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}
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if (is_ssl) {
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if (file && *file) {
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if (!r_socket_listen (rior->fd, port, file)) {
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r_socket_free (rior->fd);
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free (rior);
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return NULL;
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}
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} else {
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free (rior);
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return NULL;
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}
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} else {
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if (!r_socket_listen (rior->fd, port, NULL)) {
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r_socket_free (rior->fd);
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free (rior);
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return NULL;
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}
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}
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return r_io_desc_new (io, &r_io_plugin_rap,
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pathname, rw, mode, rior);
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}
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if (!(rap_fd = r_socket_new (is_ssl))) {
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eprintf ("Cannot create new socket\n");
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return NULL;
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}
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if (r_socket_connect_tcp (rap_fd, ptr, port, 30) == false) {
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eprintf ("Cannot connect to '%s' (%d)\n", ptr, p);
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r_socket_free (rap_fd);
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return NULL;
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}
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eprintf ("Connected to: %s at port %s\n", ptr, port);
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rior = R_NEW0 (RIORap);
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if (!rior) {
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r_socket_free (rap_fd);
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return NULL;
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}
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rior->listener = false;
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rior->client = rior->fd = rap_fd;
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if (file && *file) {
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// send
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buf[0] = RMT_OPEN;
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buf[1] = rw;
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buf[2] = (ut8)strlen (file);
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memcpy (buf + 3, file, buf[2]);
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(void)r_socket_write (rap_fd, buf, buf[2] + 3);
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r_socket_flush (rap_fd);
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// read
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eprintf ("waiting... ");
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buf[0] = 0;
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r_socket_read_block (rap_fd, (ut8*)buf, 5);
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if (buf[0] != (char)(RMT_OPEN | RMT_REPLY)) {
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eprintf ("rap: Expecting OPEN|REPLY packet. got %02x\n", buf[0]);
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r_socket_free (rap_fd);
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free (rior);
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return NULL;
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}
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i = r_read_at_be32 (buf, 1);
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if (i > 0) {
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eprintf ("ok\n");
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}
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// io->cb_core_cmd (io->user, "e io.va=0");
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io->cb_core_cmd (io->user, ".=!i*");
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io->cb_core_cmd (io->user, ".=!f*");
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io->cb_core_cmd (io->user, ".=!om*");
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#if 0
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/* Read meta info */
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r_socket_read (rap_fd, (ut8 *)&buf, 4);
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r_mem_copyendian ((ut8 *)&i, (ut8*)buf, 4, ENDIAN);
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while (i>0) {
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int n = r_socket_read (rap_fd, (ut8 *)&buf, i);
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if (n<1) break;
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buf[i] = 0;
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io->core_cmd_cb (io->user, buf);
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n = r_socket_read (rap_fd, (ut8 *)&buf, 4);
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if (n<1) break;
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r_mem_copyendian ((ut8 *)&i, (ut8*)buf, 4, ENDIAN);
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i -= n;
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}
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#endif
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} else {
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// r_socket_free (rap_fd);
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// free (rior);
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//return NULL;
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}
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//r_socket_free (rap_fd);
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return r_io_desc_new (io, &r_io_plugin_rap,
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pathname, rw, mode, rior);
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}
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static int __rap_listener(RIODesc *fd) {
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return (RIORAP_IS_VALID (fd))? RIORAP_IS_LISTEN (fd): 0; // -1 ?
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}
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static char *__rap_system(RIO *io, RIODesc *fd, const char *command) {
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int ret, reslen = 0, cmdlen = 0;
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RSocket *s = RIORAP_FD (fd);
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unsigned int i;
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char *ptr, *res, *str;
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ut8 buf[RMT_MAX];
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buf[0] = RMT_CMD;
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i = strlen (command) + 1;
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if (i > RMT_MAX - 5) {
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eprintf ("Command too long\n");
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return NULL;
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}
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r_write_be32 (buf + 1, i);
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memcpy (buf + 5, command, i);
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(void)r_socket_write (s, buf, i+5);
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r_socket_flush (s);
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/* read reverse cmds */
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for (;;) {
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ret = r_socket_read_block (s, buf, 1);
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if (ret != 1) {
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return NULL;
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}
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/* system back in the middle */
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/* TODO: all pkt handlers should check for reverse queries */
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if (buf[0] != RMT_CMD) {
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break;
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}
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// run io->cmdstr
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// return back the string
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buf[0] |= RMT_REPLY;
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memset (buf + 1, 0, 4);
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ret = r_socket_read_block (s, buf + 1, 4);
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if (ret != 4) {
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return NULL;
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}
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cmdlen = r_read_at_be32 (buf, 1);
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if (cmdlen + 1 == 0) { // check overflow
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cmdlen = 0;
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}
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str = calloc (1, cmdlen + 1);
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ret = r_socket_read_block (s, (ut8*)str, cmdlen);
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eprintf ("RUN %d CMD(%s)\n", ret, str);
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if (str && *str) {
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res = io->cb_core_cmdstr (io->user, str);
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} else {
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res = strdup ("");
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}
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eprintf ("[%s]=>(%s)\n", str, res);
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reslen = strlen (res);
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free (str);
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r_write_be32 (buf + 1, reslen);
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memcpy (buf + 5, res, reslen);
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free (res);
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(void)r_socket_write (s, buf, reslen + 5);
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r_socket_flush (s);
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}
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// read
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ret = r_socket_read_block (s, buf + 1, 4);
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if (ret != 4) {
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return NULL;
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}
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if (buf[0] != (RMT_CMD | RMT_REPLY)) {
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eprintf ("Unexpected rap cmd reply\n");
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return NULL;
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}
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i = r_read_at_be32 (buf, 1);
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ret = 0;
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if (i > ST32_MAX) {
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eprintf ("Invalid length\n");
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return NULL;
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}
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ptr = (char *)calloc (1, i + 1);
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if (ptr) {
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int ir, tr = 0;
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do {
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ir = r_socket_read_block (s, (ut8*)ptr + tr, i - tr);
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if (ir < 1) {
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break;
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}
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tr += ir;
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} while (tr < i);
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// TODO: use io->cb_printf() with support for \x00
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ptr[i] = 0;
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if (io->cb_printf) {
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io->cb_printf ("%s", ptr);
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} else {
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if (write (1, ptr, i) != i) {
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eprintf ("Failed to write\n");
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}
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}
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free (ptr);
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}
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#if DEAD_CODE
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/* Clean */
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if (ret > 0) {
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ret -= r_socket_read (s, (ut8*)buf, RMT_MAX);
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}
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#endif
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return NULL;
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}
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RIOPlugin r_io_plugin_rap = {
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.name = "rap",
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.desc = "Remote binary protocol plugin",
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.uris = "rap://,raps://",
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.license = "MIT",
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.listener = __rap_listener,
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.open = __rap_open,
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.close = __rap_close,
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.read = __rap_read,
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.check = __rap_plugin_open,
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.lseek = __rap_lseek,
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.system = __rap_system,
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.write = __rap_write,
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.accept = __rap_accept,
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};
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#ifndef CORELIB
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R_API RLibStruct radare_plugin = {
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.type = R_LIB_TYPE_IO,
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.data = &r_io_plugin_rap,
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.version = R2_VERSION
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};
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#endif
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