diff options
| -rw-r--r-- | lib/ssh/src/ssh_connection_handler.erl | 8 | ||||
| -rw-r--r-- | lib/ssh/src/ssh_dbg.erl | 73 |
2 files changed, 77 insertions, 4 deletions
diff --git a/lib/ssh/src/ssh_connection_handler.erl b/lib/ssh/src/ssh_connection_handler.erl index 7c87591cf2..8f32966a12 100644 --- a/lib/ssh/src/ssh_connection_handler.erl +++ b/lib/ssh/src/ssh_connection_handler.erl @@ -594,7 +594,7 @@ handle_event(_, socket_control, {hello,_}=StateName, D) -> {stop, {shutdown,{unexpected_getopts_return, Other}}} end; -handle_event(_, {info_line,_Line}, {hello,Role}=StateName, D) -> +handle_event(_, {info_line,Line}, {hello,Role}=StateName, D) -> case Role of client -> %% The server may send info lines to the client before the version_exchange @@ -605,9 +605,9 @@ handle_event(_, {info_line,_Line}, {hello,Role}=StateName, D) -> %% But the client may NOT send them to the server. Openssh answers with cleartext, %% and so do we send_bytes("Protocol mismatch.", D), - ?call_disconnectfun_and_log_cond("Protocol mismatch.", - "Protocol mismatch in version exchange. Client sent info lines.", - StateName, D), + Msg = io_lib:format("Protocol mismatch in version exchange. Client sent info lines.~n~s", + [ssh_dbg:hex_dump(Line, 64)]), + ?call_disconnectfun_and_log_cond("Protocol mismatch.", Msg, StateName, D), {stop, {shutdown,"Protocol mismatch in version exchange. Client sent info lines."}} end; diff --git a/lib/ssh/src/ssh_dbg.erl b/lib/ssh/src/ssh_dbg.erl index 4fe15b24d3..43ac4c0ccf 100644 --- a/lib/ssh/src/ssh_dbg.erl +++ b/lib/ssh/src/ssh_dbg.erl @@ -60,6 +60,7 @@ cbuf_stop_clear/0, cbuf_in/1, cbuf_list/0, + hex_dump/1, hex_dump/2, fmt_cbuf_items/0, fmt_cbuf_item/1 ]). @@ -439,3 +440,75 @@ fmt_value(#circ_buf_entry{module = M, io_lib:format("~p:~p ~p/~p ~p~n~s",[M,L,F,A,Pid,fmt_value(V)]); fmt_value(Value) -> io_lib:format("~p",[Value]). + +%%%================================================================ + +-record(h, {max_bytes = 65536, + bytes_per_line = 16, + address_len = 4 + }). + + +hex_dump(Data) -> hex_dump1(Data, hd_opts([])). + +hex_dump(X, Max) when is_integer(Max) -> + hex_dump(X, [{max_bytes,Max}]); +hex_dump(X, OptList) when is_list(OptList) -> + hex_dump1(X, hd_opts(OptList)). + +hex_dump1(B, Opts) when is_binary(B) -> hex_dump1(binary_to_list(B), Opts); +hex_dump1(L, Opts) when is_list(L), length(L) > Opts#h.max_bytes -> + io_lib:format("~s---- skip ~w bytes----~n", [hex_dump1(lists:sublist(L,Opts#h.max_bytes), Opts), + length(L) - Opts#h.max_bytes + ]); +hex_dump1(L, Opts0) when is_list(L) -> + Opts = Opts0#h{address_len = num_hex_digits(Opts0#h.max_bytes)}, + Result = hex_dump(L, [{0,[],[]}], Opts), + [io_lib:format("~*.s | ~*s | ~s~n" + "~*.c-+-~*c-+-~*c~n", + [Opts#h.address_len, lists:sublist("Address",Opts#h.address_len), + -3*Opts#h.bytes_per_line, lists:sublist("Hexdump",3*Opts#h.bytes_per_line), + "ASCII", + Opts#h.address_len, $-, + 3*Opts#h.bytes_per_line, $-, + Opts#h.bytes_per_line, $- + ]) | + [io_lib:format("~*.16.0b | ~s~*c | ~s~n",[Opts#h.address_len, N*Opts#h.bytes_per_line, + lists:reverse(Hexs), + 3*(Opts#h.bytes_per_line-length(Hexs)), $ , + lists:reverse(Chars)]) + || {N,Hexs,Chars} <- lists:reverse(Result) + ] + ]. + + +hd_opts(L) -> lists:foldl(fun hd_opt/2, #h{}, L). + +hd_opt({max_bytes,M}, O) -> O#h{max_bytes=M}; +hd_opt({bytes_per_line,M}, O) -> O#h{bytes_per_line=M}. + + +num_hex_digits(N) when N<16 -> 1; +num_hex_digits(N) -> trunc(math:ceil(math:log2(N)/4)). + + +hex_dump([L|Cs], Result0, Opts) when is_list(L) -> + Result = hex_dump(L,Result0, Opts), + hex_dump(Cs, Result, Opts); + +hex_dump(Cs, [{N0,_,Chars}|_]=Lines, Opts) when length(Chars) == Opts#h.bytes_per_line -> + hex_dump(Cs, [{N0+1,[],[]}|Lines], Opts); + +hex_dump([C|Cs], [{N,Hexs,Chars}|Lines], Opts) -> + Asc = if + 16#20 =< C,C =< 16#7E -> C; + true -> $. + end, + Hex = io_lib:format("~2.16.0b ", [C]), + hex_dump(Cs, [{N, [Hex|Hexs], [Asc|Chars]} | Lines], Opts); + +hex_dump([], Result, _) -> + Result. + + + |