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New repl command: send-garbage

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This new command attempts to send malformed utf8 string to current chat with
dc_send_text_msg() function. Currently, instead of error code it causes
application crash with following backtrace:

thread 'main' panicked at 'Non utf8 string: '[255]' (Utf8Error { valid_up_to: 0, error_len: Some(1) })', src/dc_t
ools.rs:1571:9
stack backtrace:
   0: backtrace::backtrace::libunwind::trace
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88
   1: backtrace::backtrace::trace_unsynchronized
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:47
   3: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:36
   4: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:200
   5: std::panicking::default_hook
             at src/libstd/panicking.rs:214
   6: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:477
   7: std::panicking::continue_panic_fmt
             at src/libstd/panicking.rs:384
   8: std::panicking::begin_panic_fmt
             at src/libstd/panicking.rs:339
   9: deltachat::dc_tools::as_str::{{closure}}
             at src/dc_tools.rs:1571
  10: core::result::Result<T,E>::unwrap_or_else
             at /rustc/0b680cfce544ff9a59d720020e397c4bf3346650/src/libcore/result.rs:818
  11: deltachat::dc_tools::as_str
             at src/dc_tools.rs:1570
  12: deltachat::dc_chat::prepare_msg_raw
             at src/dc_chat.rs:726
  13: deltachat::dc_chat::prepare_msg_common
             at src/dc_chat.rs:461
  14: deltachat::dc_chat::dc_send_msg
             at src/dc_chat.rs:905
  15: deltachat::dc_chat::dc_send_text_msg
             at src/dc_chat.rs:981
  16: repl::cmdline::dc_cmdline
             at examples/repl/cmdline.rs:955
  17: repl::handle_cmd
             at examples/repl/main.rs:566
  18: repl::main_0
             at examples/repl/main.rs:445
  19: repl::main
             at examples/repl/main.rs:578
  20: std::rt::lang_start::{{closure}}
             at /rustc/0b680cfce544ff9a59d720020e397c4bf3346650/src/libstd/rt.rs:64
  21: std::rt::lang_start_internal::{{closure}}
             at src/libstd/rt.rs:49
  22: std::panicking::try::do_call
             at src/libstd/panicking.rs:296
  23: __rust_maybe_catch_panic
             at src/libpanic_unwind/lib.rs:82
  24: std::panicking::try
             at src/libstd/panicking.rs:275
  25: std::panic::catch_unwind
             at src/libstd/panic.rs:394
  26: std::rt::lang_start_internal
             at src/libstd/rt.rs:48
  27: std::rt::lang_start
             at /rustc/0b680cfce544ff9a59d720020e397c4bf3346650/src/libstd/rt.rs:64
  28: main
  29: __libc_start_main
  30: _start
This commit is contained in:
Dmitry Bogatov
2019-07-27 08:07:38 +00:00
parent f63e79cd6d
commit d1968d8ccb
2 changed files with 14 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
examples/repl/cmdline.rs
View File

@@ -450,6 +450,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
dellocations\n\
getlocations [<contact-id>]\n\
send <text>\n\
send-garbage\n\
sendimage <file> [<text>]\n\
sendfile <file>\n\
draft [<text>]\n\
@@ -948,6 +949,16 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
bail!("Sending failed.");
}
}
"send-garbage" => {
ensure!(!sel_chat.is_null(), "No chat selected.");
let msg = b"\xff\x00"; // NUL-terminated C-string, that is malformed utf-8
if 0 != dc_send_text_msg(context, dc_chat_get_id(sel_chat), msg.as_ptr().cast()) {
println!("Malformed utf-8 succesfully send. Not nice.");
} else {
bail!("Garbage sending failed, as expected.");
}
}
"sendempty" => {
ensure!(!sel_chat.is_null(), "No chat selected.");
if 0 != dc_send_text_msg(