csit - Integration tests

Age	Commit message (Collapse)	Author	Files	Lines
2018-04-03	CSIT Trending: Add x710, IMIX	Tibor Frank	3	-48/+549
	- L2 - container memif - VM vhost Change-Id: I74a720dad12e1709fd99f76f022c863c80969611 Signed-off-by: Tibor Frank <tifrank@cisco.com>
2018-03-28	PAL Trending: Data in txt table in Mpps	Tibor Frank	1	-1/+1
	Change-Id: I3b27f95c899e2a904fe806de24f7a0d5440cb4ff Signed-off-by: Tibor Frank <tifrank@cisco.com>
2018-03-28	PAL Trending: Static content	Tibor Frank	11	-545/+101
	Change-Id: I4c46a0b06c5d726f7bfb5705d153f101eb46796f Signed-off-by: Tibor Frank <tifrank@cisco.com>
2018-03-26	Add IPSec tests	Tibor Frank	2	-11/+10
	Change-Id: Ie1ddc6189a68a299207fe9158d1be8409ec2bc6a Signed-off-by: Tibor Frank <tifrank@cisco.com>
2018-03-23	CSIT-1004: Generate csv and txt tables with trending and statistical data	Tibor Frank	2	-0/+9
	Change-Id: I50ba76c06621a9a293a5327b5b7709e4df6a4756 Signed-off-by: Tibor Frank <tifrank@cisco.com>
2018-03-23	CSIT-949: Data models	Tibor Frank	4	-8/+154
	Change-Id: I07d0b122632c15fa07a5871dc268d654f410ef4f Signed-off-by: Tibor Frank <tifrank@cisco.com>
2018-03-22	CSIT-913: Continuous Trending, Analysis and Change Detection	Tibor Frank	8	-14/+482
	- CSIT-949: Add new plots - CSIT 951: Add new plots Change-Id: I09440df5209e3207339a8a9509c084da16f06356 Signed-off-by: Tibor Frank <tifrank@cisco.com>
2018-03-21	CSIT-913: Continuous Trending, Analysis and Change Detection	Tibor Frank	8	-0/+456
	- CSIT-915: LLD - CSIT-917: Functions to evaluate the results according to the PASS / FAIL criteria - CSIT-918: Sphinx configuration - CSIT-948: Statistical functions - CSIT-949: Data models for trending plots - CSIT-950: Code trending plots - CSIT-951: Static content - CSIT-984: PAL Specification file - CSIT-996: Download data from nexus Change-Id: Icb9305945bb0f142135bb177cb8781ba0096280e Signed-off-by: Tibor Frank <tifrank@cisco.com>

/* * Copyright (c) 2015 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* * cli.c: Unix stdin/socket CLI. * * Copyright (c) 2008 Eliot Dresselhaus * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /** * @file * @brief Unix stdin/socket command line interface. * Provides a command line interface so humans can interact with VPP. * This is predominantly a debugging and testing mechanism. */ /*? %%clicmd:group_label Command line session %% ?*/ /*? %%syscfg:group_label Command line session %% ?*/ #include <vlib/vlib.h> #include <vlib/unix/unix.h> #include <vppinfra/timer.h> #include <ctype.h> #include <fcntl.h> #include <sys/stat.h> #include <termios.h> #include <signal.h> #include <unistd.h> #include <arpa/telnet.h> #include <sys/ioctl.h> /** ANSI escape code. */ #define ESC "\x1b" /** ANSI Control Sequence Introducer. */ #define CSI ESC "[" /** ANSI clear screen. */ #define ANSI_CLEAR CSI "2J" CSI "1;1H" /** ANSI reset color settings. */ #define ANSI_RESET CSI "0m" /** ANSI Start bold text. */ #define ANSI_BOLD CSI "1m" /** ANSI Stop bold text. */ #define ANSI_DIM CSI "2m" /** ANSI Start dark red text. */ #define ANSI_DRED ANSI_DIM CSI "31m" /** ANSI Start bright red text. */ #define ANSI_BRED ANSI_BOLD CSI "31m" /** ANSI clear line cursor is on. */ #define ANSI_CLEARLINE CSI "2K" /** ANSI scroll screen down one line. */ #define ANSI_SCROLLDN CSI "1T" /** ANSI save cursor position. */ #define ANSI_SAVECURSOR CSI "s" /** ANSI restore cursor position if previously saved. */ #define ANSI_RESTCURSOR CSI "u" /** Maximum depth into a byte stream from which to compile a Telnet * protocol message. This is a saftey measure. */ #define UNIX_CLI_MAX_DEPTH_TELNET 24 /** Unix standard in */ #define UNIX_CLI_STDIN_FD 0 /** A CLI banner line. */ typedef struct { u8 *line; /**< The line to print. */ u32 length; /**< The length of the line without terminating NUL. */ } unix_cli_banner_t; #define _(a) { .line = (u8 *)(a), .length = sizeof(a) - 1 } /** Plain welcome banner. */ static unix_cli_banner_t unix_cli_banner[] = { _(" _______ _ _ _____ ___ \n"), _(" __/ __/ _ \\ (_)__ | | / / _ \\/ _ \\\n"), _(" _/ _// // / / / _ \\ | |/ / ___/ ___/\n"), _(" /_/ /____(_)_/\\___/ |___/_/ /_/ \n"), _("\n") }; /** ANSI color welcome banner. */ static unix_cli_banner_t unix_cli_banner_color[] = { _(ANSI_BRED " _______ _ " ANSI_RESET " _ _____ ___ \n"), _(ANSI_BRED " __/ __/ _ \\ (_)__ " ANSI_RESET " | | / / _ \\/ _ \\\n"), _(ANSI_BRED " _/ _// // / / / _ \\" ANSI_RESET " | |/ / ___/ ___/\n"), _(ANSI_BRED " /_/ /____(_)_/\\___/" ANSI_RESET " |___/_/ /_/ \n"), _("\n") }; #undef _ /** Pager line index */ typedef struct { /** Index into pager_vector */ u32 line; /** Offset of the string in the line */ u32 offset; /** Length of the string in the line */ u32 length; } unix_cli_pager_index_t; /** Unix CLI session. */ typedef struct { /** The file index held by unix.c */ u32 unix_file_index; /** Vector of output pending write to file descriptor. */ u8 *output_vector; /** Vector of input saved by Unix input node to be processed by CLI process. */ u8 *input_vector; /** This session has command history. */ u8 has_history; /** Array of vectors of commands in the history. */ u8 **command_history; /** The command currently pointed at by the history cursor. */ u8 *current_command; /** How far from the end of the history array the user has browsed. */ i32 excursion; /** Maximum number of history entries this session will store. */ u32 history_limit; /** Current command line counter */ u32 command_number; /** The string being searched for in the history. */ u8 *search_key; /** If non-zero then the CLI is searching in the history array. * - @c -1 means search backwards. * - @c 1 means search forwards. */ int search_mode; /** Position of the insert cursor on the current input line */ u32 cursor; /** Line mode or char mode */ u8 line_mode; /** Set if the CRLF mode wants CR + LF */ u8 crlf_mode; /** Can we do ANSI output? */ u8 ansi_capable; /** Has the session started? */ u8 started; /** Disable the pager? */ u8 no_pager; /** Pager buffer */ u8 **pager_vector; /** Index of line fragments in the pager buffer */ unix_cli_pager_index_t *pager_index; /** Line number of top of page */ u32 pager_start; /** Terminal width */ u32 width; /** Terminal height */ u32 height; /** Process node identifier */ u32 process_node_index; } unix_cli_file_t; /** Resets the pager buffer and other data. * @param f The CLI session whose pager needs to be reset. */ always_inline void unix_cli_pager_reset (unix_cli_file_t * f) { u8 **p; f->pager_start = 0; vec_free (f->pager_index); f->pager_index = 0; vec_foreach (p, f->pager_vector) { vec_free (*p); } vec_free (f->pager_vector); f->pager_vector = 0; } /** Release storage used by a CLI session. * @param f The CLI session whose storage needs to be released. */ always_inline void unix_cli_file_free (unix_cli_file_t * f) { vec_free (f->output_vector); vec_free (f->input_vector); unix_cli_pager_reset (f); } /** CLI actions */ typedef enum { UNIX_CLI_PARSE_ACTION_NOACTION = 0, /**< No action */ UNIX_CLI_PARSE_ACTION_CRLF, /**< Carriage return, newline or enter */ UNIX_CLI_PARSE_ACTION_TAB, /**< Tab key */ UNIX_CLI_PARSE_ACTION_ERASE, /**< Erase cursor left */ UNIX_CLI_PARSE_ACTION_ERASERIGHT, /**< Erase cursor right */ UNIX_CLI_PARSE_ACTION_UP, /**< Up arrow */ UNIX_CLI_PARSE_ACTION_DOWN, /**< Down arrow */ UNIX_CLI_PARSE_ACTION_LEFT, /**< Left arrow */ UNIX_CLI_PARSE_ACTION_RIGHT, /**< Right arrow */ UNIX_CLI_PARSE_ACTION_HOME, /**< Home key (jump to start of line) */ UNIX_CLI_PARSE_ACTION_END, /**< End key (jump to end of line) */ UNIX_CLI_PARSE_ACTION_WORDLEFT, /**< Jump cursor to start of left word */ UNIX_CLI_PARSE_ACTION_WORDRIGHT, /**< Jump cursor to start of right word */ UNIX_CLI_PARSE_ACTION_ERASELINELEFT, /**< Erase line to left of cursor */ UNIX_CLI_PARSE_ACTION_ERASELINERIGHT, /**< Erase line to right & including cursor */ UNIX_CLI_PARSE_ACTION_CLEAR, /**< Clear the terminal */ UNIX_CLI_PARSE_ACTION_REVSEARCH, /**< Search backwards in command history */ UNIX_CLI_PARSE_ACTION_FWDSEARCH, /**< Search forwards in command history */ UNIX_CLI_PARSE_ACTION_YANK, /**< Undo last erase action */ UNIX_CLI_PARSE_ACTION_TELNETIAC, /**< Telnet control code */ UNIX_CLI_PARSE_ACTION_PAGER_CRLF, /**< Enter pressed (CR, CRLF, LF, etc) */ UNIX_CLI_PARSE_ACTION_PAGER_QUIT, /**< Exit the pager session */ UNIX_CLI_PARSE_ACTION_PAGER_NEXT, /**< Scroll to next page */ UNIX_CLI_PARSE_ACTION_PAGER_DN, /**< Scroll to next line */ UNIX_CLI_PARSE_ACTION_PAGER_UP, /**< Scroll to previous line */ UNIX_CLI_PARSE_ACTION_PAGER_TOP, /**< Scroll to first line */ UNIX_CLI_PARSE_ACTION_PAGER_BOTTOM, /**< Scroll to last line */ UNIX_CLI_PARSE_ACTION_PAGER_PGDN, /**< Scroll to next page */ UNIX_CLI_PARSE_ACTION_PAGER_PGUP, /**< Scroll to previous page */ UNIX_CLI_PARSE_ACTION_PAGER_REDRAW, /**< Clear and redraw the page on the terminal */ UNIX_CLI_PARSE_ACTION_PAGER_SEARCH, /**< Search the pager buffer */ UNIX_CLI_PARSE_ACTION_PARTIALMATCH, /**< Action parser found a partial match */ UNIX_CLI_PARSE_ACTION_NOMATCH /**< Action parser did not find any match */ } unix_cli_parse_action_t; /** @brief Mapping of input buffer strings to action values. * @note This won't work as a hash since we need to be able to do * partial matches on the string. */ typedef struct { u8 *input; /**< Input string to match. */ u32 len; /**< Length of input without final NUL. */ unix_cli_parse_action_t action; /**< Action to take when matched. */ } unix_cli_parse_actions_t; /** @brief Given a capital ASCII letter character return a @c NUL terminated * string with the control code for that letter. * * @param c An ASCII character. * @return A @c NUL terminated string of type @c u8[]. * * @par Example * @c CTL('A') returns <code>{ 0x01, 0x00 }</code> as a @c u8[]. */ #define CTL(c) (u8[]){ (c) - '@', 0 } #define _(a,b) { .input = (u8 *)(a), .len = sizeof(a) - 1, .action = (b) } /** * Patterns to match on a CLI input stream. * @showinitializer */ static unix_cli_parse_actions_t unix_cli_parse_strings[] = { /* Line handling */ _("\r\n", UNIX_CLI_PARSE_ACTION_CRLF), /* Must be before '\r' */ _("\n", UNIX_CLI_PARSE_ACTION_CRLF), _("\r\0", UNIX_CLI_PARSE_ACTION_CRLF), /* Telnet does this */ _("\r", UNIX_CLI_PARSE_ACTION_CRLF), /* Unix shell control codes */ _(CTL ('B'), UNIX_CLI_PARSE_ACTION_LEFT), _(CTL ('F'), UNIX_CLI_PARSE_ACTION_RIGHT), _(CTL ('P'), UNIX_CLI_PARSE_ACTION_UP), _(CTL ('N'), UNIX_CLI_PARSE_ACTION_DOWN), _(CTL ('A'), UNIX_CLI_PARSE_ACTION_HOME), _(CTL ('E'), UNIX_CLI_PARSE_ACTION_END), _(CTL ('D'), UNIX_CLI_PARSE_ACTION_ERASERIGHT), _(CTL ('U'), UNIX_CLI_PARSE_ACTION_ERASELINELEFT), _(CTL ('K'), UNIX_CLI_PARSE_ACTION_ERASELINERIGHT), _(CTL ('Y'), UNIX_CLI_PARSE_ACTION_YANK), _(CTL ('L'), UNIX_CLI_PARSE_ACTION_CLEAR), _(ESC "b", UNIX_CLI_PARSE_ACTION_WORDLEFT), /* Alt-B */ _(ESC "f", UNIX_CLI_PARSE_ACTION_WORDRIGHT), /* Alt-F */ _("\b", UNIX_CLI_PARSE_ACTION_ERASE), /* ^H */ _("\x7f", UNIX_CLI_PARSE_ACTION_ERASE), /* Backspace */ _("\t", UNIX_CLI_PARSE_ACTION_TAB), /* ^I */ /* VT100 Normal mode - Broadest support */ _(CSI "A", UNIX_CLI_PARSE_ACTION_UP), _(CSI "B", UNIX_CLI_PARSE_ACTION_DOWN), _(CSI "C", UNIX_CLI_PARSE_ACTION_RIGHT), _(CSI "D", UNIX_CLI_PARSE_ACTION_LEFT), _(CSI "H", UNIX_CLI_PARSE_ACTION_HOME), _(CSI "F", UNIX_CLI_PARSE_ACTION_END), _(CSI "3~", UNIX_CLI_PARSE_ACTION_ERASERIGHT), /* Delete */ _(CSI "1;5D", UNIX_CLI_PARSE_ACTION_WORDLEFT), /* C-Left */ _(CSI "1;5C", UNIX_CLI_PARSE_ACTION_WORDRIGHT), /* C-Right */ /* VT100 Application mode - Some Gnome Terminal functions use these */ _(ESC "OA", UNIX_CLI_PARSE_ACTION_UP), _(ESC "OB", UNIX_CLI_PARSE_ACTION_DOWN), _(ESC "OC", UNIX_CLI_PARSE_ACTION_RIGHT), _(ESC "OD", UNIX_CLI_PARSE_ACTION_LEFT), _(ESC "OH", UNIX_CLI_PARSE_ACTION_HOME), _(ESC "OF", UNIX_CLI_PARSE_ACTION_END), /* ANSI X3.41-1974 - sent by Microsoft Telnet and PuTTY */ _(CSI "1~", UNIX_CLI_PARSE_ACTION_HOME), _(CSI "4~", UNIX_CLI_PARSE_ACTION_END), /* Emacs-ish history search */ _(CTL ('S'), UNIX_CLI_PARSE_ACTION_FWDSEARCH), _(CTL ('R'), UNIX_CLI_PARSE_ACTION_REVSEARCH), /* Other protocol things */ _("\xff", UNIX_CLI_PARSE_ACTION_TELNETIAC), /* IAC */ _("\0", UNIX_CLI_PARSE_ACTION_NOACTION), /* NUL */ _(NULL, UNIX_CLI_PARSE_ACTION_NOMATCH) }; /** * Patterns to match when a CLI session is in the pager. * @showinitializer */ static unix_cli_parse_actions_t unix_cli_parse_pager[] = { /* Line handling */ _("\r\n", UNIX_CLI_PARSE_ACTION_PAGER_CRLF), /* Must be before '\r' */ _("\n", UNIX_CLI_PARSE_ACTION_PAGER_CRLF), _("\r\0", UNIX_CLI_PARSE_ACTION_PAGER_CRLF), /* Telnet does this */ _("\r", UNIX_CLI_PARSE_ACTION_PAGER_CRLF), /* Pager commands */ _(" ", UNIX_CLI_PARSE_ACTION_PAGER_NEXT), _("q", UNIX_CLI_PARSE_ACTION_PAGER_QUIT), _(CTL ('L'), UNIX_CLI_PARSE_ACTION_PAGER_REDRAW), _(CTL ('R'), UNIX_CLI_PARSE_ACTION_PAGER_REDRAW), _("/", UNIX_CLI_PARSE_ACTION_PAGER_SEARCH), /* VT100 */ _(CSI "A", UNIX_CLI_PARSE_ACTION_PAGER_UP), _(CSI "B", UNIX_CLI_PARSE_ACTION_PAGER_DN), _(CSI "H", UNIX_CLI_PARSE_ACTION_PAGER_TOP), _(CSI "F", UNIX_CLI_PARSE_ACTION_PAGER_BOTTOM), /* VT100 Application mode */ _(ESC "OA", UNIX_CLI_PARSE_ACTION_PAGER_UP), _(ESC "OB", UNIX_CLI_PARSE_ACTION_PAGER_DN), _(ESC "OH", UNIX_CLI_PARSE_ACTION_PAGER_TOP), _(ESC "OF", UNIX_CLI_PARSE_ACTION_PAGER_BOTTOM), /* ANSI X3.41-1974 */ _(CSI "1~", UNIX_CLI_PARSE_ACTION_PAGER_TOP), _(CSI "4~", UNIX_CLI_PARSE_ACTION_PAGER_BOTTOM), _(CSI "5~", UNIX_CLI_PARSE_ACTION_PAGER_PGUP), _(CSI "6~", UNIX_CLI_PARSE_ACTION_PAGER_PGDN), /* Other protocol things */ _("\xff", UNIX_CLI_PARSE_ACTION_TELNETIAC), /* IAC */ _("\0", UNIX_CLI_PARSE_ACTION_NOACTION), /* NUL */ _(NULL, UNIX_CLI_PARSE_ACTION_NOMATCH) }; #undef _ /** CLI session events. */ typedef enum { UNIX_CLI_PROCESS_EVENT_READ_READY, /**< A file descriptor has data to be read. */ UNIX_CLI_PROCESS_EVENT_QUIT, /**< A CLI session wants to close. */ } unix_cli_process_event_type_t; /** CLI global state. */ typedef struct { /** Prompt string for CLI. */ u8 *cli_prompt; /** Vec pool of CLI sessions. */ unix_cli_file_t *cli_file_pool; /** Vec pool of unused session indices. */ u32 *unused_cli_process_node_indices; /** The session index of the stdin cli */ u32 stdin_cli_file_index; /** File pool index of current input. */ u32 current_input_file_index; } unix_cli_main_t; /** CLI global state */ static unix_cli_main_t unix_cli_main; /** * @brief Search for a byte sequence in the action list. * * Searches the @ref unix_cli_parse_actions_t list in @a a for a match with * the bytes in @a input of maximum length @a ilen bytes. * When a match is made @a *matched indicates how many bytes were matched. * Returns a value from the enum @ref unix_cli_parse_action_t to indicate * whether no match was found, a partial match was found or a complete * match was found and what action, if any, should be taken. * * @param[in] a Actions list to search within. * @param[in] input String fragment to search for. * @param[in] ilen Length of the string in 'input'. * @param[out] matched Pointer to an integer that will contain the number * of bytes matched when a complete match is found. * * @return Action from @ref unix_cli_parse_action_t that the string fragment * matches. * @ref UNIX_CLI_PARSE_ACTION_PARTIALMATCH is returned when the * whole input string matches the start of at least one action. * @ref UNIX_CLI_PARSE_ACTION_NOMATCH is returned when there is no * match at all. */ static unix_cli_parse_action_t unix_cli_match_action (unix_cli_parse_actions_t * a, u8 * input, u32 ilen, i32 * matched) { u8 partial = 0; while (a->input) { if (ilen >= a->len) { /* see if the start of the input buffer exactly matches the current * action string. */ if (memcmp (input, a->input, a->len) == 0) { *matched = a->len; return a->action; } } else { /* if the first ilen characters match, flag this as a partial - * meaning keep collecting bytes in case of a future match */ if (memcmp (input, a->input, ilen) == 0) partial = 1; } /* check next action */ a++; } return partial ? UNIX_CLI_PARSE_ACTION_PARTIALMATCH : UNIX_CLI_PARSE_ACTION_NOMATCH; } /** Add bytes to the output vector and then flagg the I/O system that bytes * are available to be sent. */ static void unix_cli_add_pending_output (unix_file_t * uf, unix_cli_file_t * cf, u8 * buffer, uword buffer_bytes) { unix_main_t *um = &unix_main; vec_add (cf->output_vector, buffer, buffer_bytes); if (vec_len (cf->output_vector) > 0) { int skip_update = 0 != (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE); uf->flags |= UNIX_FILE_DATA_AVAILABLE_TO_WRITE; if (!skip_update) um->file_update (uf, UNIX_FILE_UPDATE_MODIFY); } } /** Delete all bytes from the output vector and flag the I/O system * that no more bytes are available to be sent. */ static void unix_cli_del_pending_output (unix_file_t * uf, unix_cli_file_t * cf, uword n_bytes) { unix_main_t *um = &unix_main; vec_delete (cf->output_vector, n_bytes, 0); if (vec_len (cf->output_vector) <= 0) { int skip_update = 0 == (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE); uf->flags &= ~UNIX_FILE_DATA_AVAILABLE_TO_WRITE; if (!skip_update) um->file_update (uf, UNIX_FILE_UPDATE_MODIFY); } } /** @brief A bit like strchr with a buffer length limit. * Search a buffer for the first instance of a character up to the limit of * the buffer length. If found then return the position of that character. * * The key departure from strchr is that if the character is not found then * return the buffer length. * * @param chr The byte value to search for. * @param str The buffer in which to search for the value. * @param len The depth into the buffer to search. * * @return The index of the first occurence of \c chr. If \c chr is not * found then \c len instead. */ always_inline word unix_vlib_findchr (u8 chr, u8 * str, word len) { word i = 0; for (i = 0; i < len; i++, str++) { if (*str == chr) return i; } return len; } /** @brief Send a buffer to the CLI stream if possible, enqueue it otherwise. * Attempts to write given buffer to the file descriptor of the given * Unix CLI session. If that session already has data in the output buffer * or if the write attempt tells us to try again later then the given buffer * is appended to the pending output buffer instead. * * This is typically called only from \c unix_vlib_cli_output_cooked since * that is where CRLF handling occurs or from places where we explicitly do * not want cooked handling. * * @param cf Unix CLI session of the desired stream to write to. * @param uf The Unix file structure of the desired stream to write to. * @param buffer Pointer to the buffer that needs to be written. * @param buffer_bytes The number of bytes from \c buffer to write. */ static void unix_vlib_cli_output_raw (unix_cli_file_t * cf, unix_file_t * uf, u8 * buffer, uword buffer_bytes) { int n = 0; if (vec_len (cf->output_vector) == 0) n = write (uf->file_descriptor, buffer, buffer_bytes); if (n < 0 && errno != EAGAIN) { clib_unix_warning ("write"); } else if ((word) n < (word) buffer_bytes) { /* We got EAGAIN or we already have stuff in the buffer; * queue up whatever didn't get sent for later. */ if (n < 0) n = 0; unix_cli_add_pending_output (uf, cf, buffer + n, buffer_bytes - n); } } /** @brief Process a buffer for CRLF handling before outputting it to the CLI. * * @param cf Unix CLI session of the desired stream to write to. * @param uf The Unix file structure of the desired stream to write to. * @param buffer Pointer to the buffer that needs to be written. * @param buffer_bytes The number of bytes from \c buffer to write. */ static void unix_vlib_cli_output_cooked (unix_cli_file_t * cf, unix_file_t * uf, u8 * buffer, uword buffer_bytes) { word end = 0, start = 0; while (end < buffer_bytes) { if (cf->crlf_mode) { /* iterate the line on \n's so we can insert a \r before it */ end = unix_vlib_findchr ('\n', buffer + start, buffer_bytes - start) + start; } else { /* otherwise just send the whole buffer */ end = buffer_bytes; } unix_vlib_cli_output_raw (cf, uf, buffer + start, end - start); if (cf->crlf_mode) { if (end < buffer_bytes) { unix_vlib_cli_output_raw (cf, uf, (u8 *) "\r\n", 2); end++; /* skip the \n that we already sent */ } start = end; } } } /** @brief Output the CLI prompt */ static void unix_cli_cli_prompt (unix_cli_file_t * cf, unix_file_t * uf) { unix_cli_main_t *cm = &unix_cli_main; unix_vlib_cli_output_raw (cf, uf, cm->cli_prompt, vec_len (cm->cli_prompt)); } /** @brief Output a pager prompt and show number of buffered lines */ static void unix_cli_pager_prompt (unix_cli_file_t * cf, unix_file_t * uf) { u8 *prompt; u32 h; h = cf->pager_start + (cf->height - 1); if (h > vec_len (cf->pager_index)) h = vec_len (cf->pager_index); prompt = format (0, "\r%s-- more -- (%d-%d/%d)%s", cf->ansi_capable ? ANSI_BOLD : "", cf->pager_start + 1, h, vec_len (cf->pager_index), cf->ansi_capable ? ANSI_RESET : ""); unix_vlib_cli_output_cooked (cf, uf, prompt, vec_len (prompt)); vec_free (prompt); } /** @brief Output a pager "skipping" message */ static void unix_cli_pager_message (unix_cli_file_t * cf, unix_file_t * uf, char *message, char *postfix) { u8 *prompt; prompt = format (0, "\r%s-- %s --%s%s", cf->ansi_capable ? ANSI_BOLD : "", message, cf->ansi_capable ? ANSI_RESET : "", postfix); unix_vlib_cli_output_cooked (cf, uf, prompt, vec_len (prompt)); vec_free (prompt); } /** @brief Erase the printed pager prompt */ static void unix_cli_pager_prompt_erase (unix_cli_file_t * cf, unix_file_t * uf) { if (cf->ansi_capable) { unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\r", 1); unix_vlib_cli_output_cooked (cf, uf, (u8 *) ANSI_CLEARLINE, sizeof (ANSI_CLEARLINE) - 1); } else { int i; unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\r", 1); for (i = 0; i < cf->width - 1; i++) unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1); unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\r", 1); } } /** @brief Uses an ANSI escape sequence to move the cursor */ static void unix_cli_ansi_cursor (unix_cli_file_t * cf, unix_file_t * uf, u16 x, u16 y) { u8 *str; str = format (0, "%s%d;%dH", CSI, y, x); unix_vlib_cli_output_cooked (cf, uf, str, vec_len (str)); vec_free (str); } /** Redraw the currently displayed page of text. * @param cf CLI session to redraw the pager buffer of. * @param uf Unix file of the CLI session. */ static void unix_cli_pager_redraw (unix_cli_file_t * cf, unix_file_t * uf) { unix_cli_pager_index_t *pi = NULL; u8 *line = NULL; word i; /* No active pager? Do nothing. */ if (!vec_len (cf->pager_index)) return; if (cf->ansi_capable) { /* If we have ANSI, send the clear screen sequence */ unix_vlib_cli_output_cooked (cf, uf, (u8 *) ANSI_CLEAR, sizeof (ANSI_CLEAR) - 1); } else { /* Otherwise make sure we're on a blank line */ unix_cli_pager_prompt_erase (cf, uf); } /* (Re-)send the current page of content */ for (i = 0; i < cf->height - 1 && i + cf->pager_start < vec_len (cf->pager_index); i++) { pi = &cf->pager_index[cf->pager_start + i]; line = cf->pager_vector[pi->line] + pi->offset; unix_vlib_cli_output_cooked (cf, uf, line, pi->length); } /* if the last line didn't end in newline, add a newline */ if (pi && line[pi->length - 1] != '\n') unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1); unix_cli_pager_prompt (cf, uf); } /** @brief Process and add a line to the pager index. * In normal operation this function will take the given character string * found in @c line and with length @c len_or_index and iterates the over the * contents, adding each line of text discovered within it to the * pager index. Lines are identified by newlines ("<code>\\n</code>") and by * strings longer than the width of the terminal. * * If instead @c line is @c NULL then @c len_or_index is taken to mean the * index of an existing line in the pager buffer; this simply means that the * input line does not need to be cloned since we alreayd have it. This is * typical if we are reindexing the pager buffer. * * @param cf The CLI session whose pager we are adding to. * @param line The string of text to be indexed into the pager buffer. * If @c line is @c NULL then the mode of operation * changes slightly; see the description above. * @param len_or_index If @c line is a pointer to a string then this parameter * indicates the length of that string; Otherwise this * value provides the index in the pager buffer of an * existing string to be indexed. */ static void unix_cli_pager_add_line (unix_cli_file_t * cf, u8 * line, word len_or_index) { u8 *p; word i, j, k; word line_index, len; u32 width = cf->width; unix_cli_pager_index_t *pi; if (line == NULL) { /* Use a line already in the pager buffer */ line_index = len_or_index; p = cf->pager_vector[line_index]; len = vec_len (p); } else { len = len_or_index; /* Add a copy of the raw string to the pager buffer */ p = vec_new (u8, len); clib_memcpy (p, line, len); /* store in pager buffer */ line_index = vec_len (cf->pager_vector); vec_add1 (cf->pager_vector, p); } i = 0; while (i < len) { /* Find the next line, or run to terminal width, or run to EOL */ int l = len - i; j = unix_vlib_findchr ((u8) '\n', p, l < width ? l : width); if (j < l && p[j] == '\n') /* incl \n */ j++; /* Add the line to the index */ k = vec_len (cf->pager_index); vec_validate (cf->pager_index, k); pi = &cf->pager_index[k]; pi->line = line_index; pi->offset = i; pi->length = j; i += j; p += j; } } /** @brief Reindex entire pager buffer. * Resets the current pager index and then re-adds the lines in the pager * buffer to the index. * * Additionally this function attempts to retain the current page start * line offset by searching for the same top-of-screen line in the new index. * * @param cf The CLI session whose pager buffer should be reindexed. */ static void unix_cli_pager_reindex (unix_cli_file_t * cf) { word i, old_line, old_offset; unix_cli_pager_index_t *pi; /* If there is nothing in the pager buffer then make sure the index * is empty and move on. */ if (cf->pager_vector == 0) { vec_reset_length (cf->pager_index); return; } /* Retain a pointer to the current page start line so we can * find it later */ pi = &cf->pager_index[cf->pager_start]; old_line = pi->line; old_offset = pi->offset; /* Re-add the buffered lines to the index */ vec_reset_length (cf->pager_index); vec_foreach_index (i, cf->pager_vector) { unix_cli_pager_add_line (cf, NULL, i); } /* Attempt to re-locate the previously stored page start line */ vec_foreach_index (i, cf->pager_index) { pi = &cf->pager_index[i]; if (pi->line == old_line && (pi->offset <= old_offset || pi->offset + pi->length > old_offset)) { /* Found it! */ cf->pager_start = i; break; } } /* In case the start line was not found (rare), ensure the pager start * index is within bounds */ if (cf->pager_start >= vec_len (cf->pager_index)) { if (!cf->height || vec_len (cf->pager_index) < (cf->height - 1)) cf->pager_start = 0; else cf->pager_start = vec_len (cf->pager_index) - (cf->height - 1); } } /** VLIB CLI output function. * * If the terminal has a pager configured then this function takes care * of collating output into the pager buffer; ensuring only the first page * is displayed and any lines in excess of the first page are buffered. * * If the maximum number of index lines in the buffer is exceeded then the * pager is cancelled and the contents of the current buffer are sent to the * terminal. * * If there is no pager configured then the output is sent directly to the * terminal. * * @param cli_file_index Index of the CLI session where this output is * directed. * @param buffer String of printabe bytes to be output. * @param buffer_bytes The number of bytes in @c buffer to be output. */ static void unix_vlib_cli_output (uword cli_file_index, u8 * buffer, uword buffer_bytes) { unix_main_t *um = &unix_main; unix_cli_main_t *cm = &unix_cli_main; unix_cli_file_t *cf; unix_file_t *uf; cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index); uf = pool_elt_at_index (um->file_pool, cf->unix_file_index); if (cf->no_pager || um->cli_pager_buffer_limit == 0 || cf->height == 0) { unix_vlib_cli_output_cooked (cf, uf, buffer, buffer_bytes); } else { word row = vec_len (cf->pager_index); u8 *line; unix_cli_pager_index_t *pi; /* Index and add the output lines to the pager buffer. */ unix_cli_pager_add_line (cf, buffer, buffer_bytes); /* Now iterate what was added to display the lines. * If we reach the bottom of the page, display a prompt. */ while (row < vec_len (cf->pager_index)) { if (row < cf->height - 1) { /* output this line */ pi = &cf->pager_index[row]; line = cf->pager_vector[pi->line] + pi->offset; unix_vlib_cli_output_cooked (cf, uf, line, pi->length); /* if the last line didn't end in newline, and we're at the * bottom of the page, add a newline */ if (line[pi->length - 1] != '\n' && row == cf->height - 2) unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1); } else { /* Display the pager prompt every 10 lines */ if (!(row % 10)) unix_cli_pager_prompt (cf, uf); } row++; } /* Check if we went over the pager buffer limit */ if (vec_len (cf->pager_index) > um->cli_pager_buffer_limit) { /* Stop using the pager for the remainder of this CLI command */ cf->no_pager = 2; /* If we likely printed the prompt, erase it */ if (vec_len (cf->pager_index) > cf->height - 1) unix_cli_pager_prompt_erase (cf, uf); /* Dump out the contents of the buffer */ for (row = cf->pager_start + (cf->height - 1); row < vec_len (cf->pager_index); row++) { pi = &cf->pager_index[row]; line = cf->pager_vector[pi->line] + pi->offset; unix_vlib_cli_output_cooked (cf, uf, line, pi->length); } unix_cli_pager_reset (cf); } } } /** Identify whether a terminal type is ANSI capable. * * Compares the string given in @c term with a list of terminal types known * to support ANSI escape sequences. * * This list contains, for example, @c xterm, @c screen and @c ansi. * * @param term A string with a terminal type in it. * @param len The length of the string in @c term. * * @return @c 1 if the terminal type is recognized as supporting ANSI * terminal sequences; @c 0 otherwise. */ static u8 unix_cli_terminal_type (u8 * term, uword len) { /* This may later be better done as a hash of some sort. */ #define _(a) do { \ if (strncasecmp(a, (char *)term, (size_t)len) == 0) return 1; \ } while(0) _("xterm"); _("xterm-color"); _("xterm-256color"); /* iTerm on Mac */ _("screen"); _("ansi"); /* Microsoft Telnet */ #undef _ return 0; } /** @brief Emit initial welcome banner and prompt on a connection. */ static void unix_cli_file_welcome (unix_cli_main_t * cm, unix_cli_file_t * cf) { unix_main_t *um = &unix_main; unix_file_t *uf = pool_elt_at_index (um->file_pool, cf->unix_file_index); unix_cli_banner_t *banner; int i, len; /* * Put the first bytes directly into the buffer so that further output is * queued until everything is ready. (oterwise initial prompt can appear * mid way through VPP initialization) */ unix_cli_add_pending_output (uf, cf, (u8 *) "\r", 1); if (!um->cli_no_banner) { if (cf->ansi_capable) { banner = unix_cli_banner_color; len = ARRAY_LEN (unix_cli_banner_color); } else { banner = unix_cli_banner; len = ARRAY_LEN (unix_cli_banner); } for (i = 0; i < len; i++) { unix_vlib_cli_output_cooked (cf, uf, banner[i].line, banner[i].length); } } /* Prompt. */ unix_cli_cli_prompt (cf, uf); cf->started = 1; } /** @brief A failsafe triggered on a timer to ensure we send the prompt * to telnet sessions that fail to negotiate the terminal type. */ static void unix_cli_file_welcome_timer (any arg, f64 delay) { unix_cli_main_t *cm = &unix_cli_main; unix_cli_file_t *cf; (void) delay; /* Check the connection didn't close already */ if (pool_is_free_index (cm->cli_file_pool, (uword) arg)) return; cf = pool_elt_at_index (cm->cli_file_pool, (uword) arg); if (!cf->started) unix_cli_file_welcome (cm, cf); } /** @brief A mostly no-op Telnet state machine. * Process Telnet command bytes in a way that ensures we're mostly * transparent to the Telnet protocol. That is, it's mostly a no-op. * * @return -1 if we need more bytes, otherwise a positive integer number of * bytes to consume from the input_vector, not including the initial * IAC byte. */ static i32 unix_cli_process_telnet (unix_main_t * um, unix_cli_file_t * cf, unix_file_t * uf, u8 * input_vector, uword len) { /* Input_vector starts at IAC byte. * See if we have a complete message; if not, return -1 so we wait for more. * if we have a complete message, consume those bytes from the vector. */ i32 consume = 0; if (len == 1) return -1; /* want more bytes */ switch (input_vector[1]) { case IAC: /* two IAC's in a row means to pass through 0xff. * since that makes no sense here, just consume it. */ consume = 1; break; case WILL: case WONT: case DO: case DONT: /* Expect 3 bytes */ if (vec_len (input_vector) < 3) return -1; /* want more bytes */ consume = 2; break; case SB: { /* Sub option - search ahead for IAC SE to end it */ i32 i; for (i = 3; i < len && i < UNIX_CLI_MAX_DEPTH_TELNET; i++) { if (input_vector[i - 1] == IAC && input_vector[i] == SE) { /* We have a complete message; see if we care about it */ switch (input_vector[2]) { case TELOPT_TTYPE: if (input_vector[3] != 0) break; /* See if the terminal type is ANSI capable */ cf->ansi_capable = unix_cli_terminal_type (input_vector + 4, i - 5); /* If session not started, we can release the pause */ if (!cf->started) /* Send the welcome banner and initial prompt */ unix_cli_file_welcome (&unix_cli_main, cf); break; case TELOPT_NAWS: /* Window size */ if (i != 8) /* check message is correct size */ break; cf->width = clib_net_to_host_u16 (*((u16 *) (input_vector + 3))); cf->height = clib_net_to_host_u16 (*((u16 *) (input_vector + 5))); /* reindex pager buffer */ unix_cli_pager_reindex (cf); /* redraw page */ unix_cli_pager_redraw (cf, uf); break; default: break; } /* Consume it all */ consume = i; break; } } if (i == UNIX_CLI_MAX_DEPTH_TELNET) consume = 1; /* hit max search depth, advance one byte */ if (consume == 0) return -1; /* want more bytes */ break; } case GA: case EL: case EC: case AO: case IP: case BREAK: case DM: case NOP: case SE: case EOR: case ABORT: case SUSP: case xEOF: /* Simple one-byte messages */ consume = 1; break; case AYT: /* Are You There - trigger a visible response */ consume = 1; unix_vlib_cli_output_cooked (cf, uf, (u8 *) "fd.io VPP\n", 10); break; default: /* Unknown command! Eat the IAC byte */ break; } return consume; } /** @brief Process actionable input. * Based on the \c action process the input; this typically involves * searching the command history or editing the current command line. */ static int unix_cli_line_process_one (unix_cli_main_t * cm, unix_main_t * um, unix_cli_file_t * cf, unix_file_t * uf, u8 input, unix_cli_parse_action_t action) { u8 *prev; int j, delta; switch (action) { case UNIX_CLI_PARSE_ACTION_NOACTION: break; case UNIX_CLI_PARSE_ACTION_REVSEARCH: case UNIX_CLI_PARSE_ACTION_FWDSEARCH: if (!cf->has_history || !cf->history_limit) break; if (cf->search_mode == 0) { /* Erase the current command (if any) */ for (j = 0; j < (vec_len (cf->current_command)); j++) unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b \b", 3); vec_reset_length (cf->search_key); vec_reset_length (cf->current_command); if (action == UNIX_CLI_PARSE_ACTION_REVSEARCH) cf->search_mode = -1; else cf->search_mode = 1; cf->cursor = 0; } else { if (action == UNIX_CLI_PARSE_ACTION_REVSEARCH) cf->search_mode = -1; else cf->search_mode = 1; cf->excursion += cf->search_mode; goto search_again; } break; case UNIX_CLI_PARSE_ACTION_ERASELINELEFT: /* Erase the command from the cursor to the start */ /* Shimmy forwards to the new end of line position */ delta = vec_len (cf->current_command) - cf->cursor; for (j = cf->cursor; j > delta; j--) unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); /* Zap from here to the end of what is currently displayed */ for (; j < (vec_len (cf->current_command)); j++) unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1); /* Get back to the start of the line */ for (j = 0; j < (vec_len (cf->current_command)); j++) unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); j = vec_len (cf->current_command) - cf->cursor; memmove (cf->current_command, cf->current_command + cf->cursor, j); _vec_len (cf->current_command) = j; /* Print the new contents */ unix_vlib_cli_output_cooked (cf, uf, cf->current_command, j); /* Shimmy back to the start */ for (j = 0; j < (vec_len (cf->current_command)); j++) unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); cf->cursor = 0; cf->search_mode = 0; break; case UNIX_CLI_PARSE_ACTION_ERASELINERIGHT: /* Erase the command from the cursor to the end */ /* Zap from cursor to end of what is currently displayed */ for (j = cf->cursor; j < (vec_len (cf->current_command)); j++) unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1); /* Get back to where we were */ for (j = cf->cursor; j < (vec_len (cf->current_command)); j++) unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); /* Truncate the line at the cursor */ _vec_len (cf->current_command) = cf->cursor; cf->search_mode = 0; break; case UNIX_CLI_PARSE_ACTION_LEFT: if (cf->cursor > 0) { unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); cf->cursor--; } cf->search_mode = 0; break; case UNIX_CLI_PARSE_ACTION_RIGHT: if (cf->cursor < vec_len (cf->current_command)) { /* have to emit the character under the cursor */ unix_vlib_cli_output_cooked (cf, uf, cf->current_command + cf->cursor, 1); cf->cursor++; } cf->search_mode = 0; break; case UNIX_CLI_PARSE_ACTION_UP: case UNIX_CLI_PARSE_ACTION_DOWN: if (!cf->has_history || !cf->history_limit) break; cf->search_mode = 0; /* Erase the command */ for (j = cf->cursor; j < (vec_len (cf->current_command)); j++) unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1); for (j = 0; j < (vec_len (cf->current_command)); j++) unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b \b", 3); vec_reset_length (cf->current_command); if (vec_len (cf->command_history)) { if (action == UNIX_CLI_PARSE_ACTION_UP) delta = -1; else delta = 1; cf->excursion += delta; if (cf->excursion == vec_len (cf->command_history)) { /* down-arrowed to last entry - want a blank line */ _vec_len (cf->current_command) = 0; } else if (cf->excursion < 0) { /* up-arrowed over the start to the end, want a blank line */ cf->excursion = vec_len (cf->command_history); _vec_len (cf->current_command) = 0; } else { if (cf->excursion > (i32) vec_len (cf->command_history) - 1) /* down-arrowed past end - wrap to start */ cf->excursion = 0; /* Print the command at the current position */ prev = cf->command_history[cf->excursion]; vec_validate (cf->current_command, vec_len (prev) - 1); clib_memcpy (cf->current_command, prev, vec_len (prev)); _vec_len (cf->current_command) = vec_len (prev); unix_vlib_cli_output_cooked (cf, uf, cf->current_command, vec_len (cf->current_command)); } cf->cursor = vec_len (cf->current_command); break; } break; case UNIX_CLI_PARSE_ACTION_HOME: if (vec_len (cf->current_command) && cf->cursor > 0) { while (cf->cursor) { unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); cf->cursor--; } } cf->search_mode = 0; break; case UNIX_CLI_PARSE_ACTION_END: if (vec_len (cf->current_command) && cf->cursor < vec_len (cf->current_command)) { unix_vlib_cli_output_cooked (cf, uf, cf->current_command + cf->cursor, vec_len (cf->current_command) - cf->cursor); cf->cursor = vec_len (cf->current_command); } cf->search_mode = 0; break; case UNIX_CLI_PARSE_ACTION_WORDLEFT: if (vec_len (cf->current_command) && cf->cursor > 0) { j = cf->cursor; unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); j--; while (j && isspace (cf->current_command[j])) { unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); j--; } while (j && !isspace (cf->current_command[j])) { if (isspace (cf->current_command[j - 1])) break; unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); j--; } cf->cursor = j; } cf->search_mode = 0; break; case UNIX_CLI_PARSE_ACTION_WORDRIGHT: if (vec_len (cf->current_command) && cf->cursor < vec_len (cf->current_command)) { int e = vec_len (cf->current_command); j = cf->cursor; while (j < e && !isspace (cf->current_command[j])) j++; while (j < e && isspace (cf->current_command[j])) j++; unix_vlib_cli_output_cooked (cf, uf, cf->current_command + cf->cursor, j - cf->cursor); cf->cursor = j; } cf->search_mode = 0; break; case UNIX_CLI_PARSE_ACTION_ERASE: if (vec_len (cf->current_command)) { if (cf->cursor == vec_len (cf->current_command)) { unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b \b", 3); _vec_len (cf->current_command)--; cf->cursor--; } else if (cf->cursor > 0) { /* shift everything at & to the right of the cursor left by 1 */ j = vec_len (cf->current_command) - cf->cursor; memmove (cf->current_command + cf->cursor - 1, cf->current_command + cf->cursor, j); _vec_len (cf->current_command)--; cf->cursor--; /* redraw the rest of the line */ unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); unix_vlib_cli_output_cooked (cf, uf, cf->current_command + cf->cursor, j); unix_vlib_cli_output_cooked (cf, uf, (u8 *) " \b\b", 3); /* and shift the terminal cursor back where it should be */ while (--j) unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); } } cf->search_mode = 0; cf->excursion = 0; vec_reset_length (cf->search_key); break; case UNIX_CLI_PARSE_ACTION_ERASERIGHT: if (vec_len (cf->current_command)) { if (cf->cursor < vec_len (cf->current_command)) { /* shift everything to the right of the cursor left by 1 */ j = vec_len (cf->current_command) - cf->cursor - 1; memmove (cf->current_command + cf->cursor, cf->current_command + cf->cursor + 1, j); _vec_len (cf->current_command)--; /* redraw the rest of the line */ unix_vlib_cli_output_cooked (cf, uf, cf->current_command + cf->cursor, j); unix_vlib_cli_output_cooked (cf, uf, (u8 *) " \b", 2); /* and shift the terminal cursor back where it should be */ if (j) { unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); while (--j) unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); } } } else if (input == 'D' - '@') { /* ^D with no command entered = quit */ unix_vlib_cli_output_cooked (cf, uf, (u8 *) "quit\n", 5); vlib_process_signal_event (um->vlib_main, vlib_current_process (um->vlib_main), UNIX_CLI_PROCESS_EVENT_QUIT, cf - cm->cli_file_pool); } cf->search_mode = 0; cf->excursion = 0; vec_reset_length (cf->search_key); break; case UNIX_CLI_PARSE_ACTION_CLEAR: /* If we're in ANSI mode, clear the screen. * Then redraw the prompt and any existing command input, then put * the cursor back where it was in that line. */ if (cf->ansi_capable) unix_vlib_cli_output_cooked (cf, uf, (u8 *) ANSI_CLEAR, sizeof (ANSI_CLEAR) - 1); else unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1); unix_vlib_cli_output_raw (cf, uf, cm->cli_prompt, vec_len (cm->cli_prompt)); unix_vlib_cli_output_raw (cf, uf, cf->current_command, vec_len (cf->current_command)); for (j = cf->cursor; j < vec_len (cf->current_command); j++) unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1); break; case UNIX_CLI_PARSE_ACTION_TAB: case UNIX_CLI_PARSE_ACTION_YANK: /* TODO */ break; case UNIX_CLI_PARSE_ACTION_PAGER_QUIT: pager_quit: unix_cli_pager_prompt_erase (cf, uf); unix_cli_pager_reset (cf); unix_cli_cli_prompt (cf, uf); break; case UNIX_CLI_PARSE_ACTION_PAGER_NEXT: case UNIX_CLI_PARSE_ACTION_PAGER_PGDN: /* show next page of the buffer */ if (cf->height + cf->pager_start < vec_len (cf->pager_index)) { u8 *line = NULL; unix_cli_pager_index_t *pi = NULL; int m = cf->pager_start + (cf->height - 1); unix_cli_pager_prompt_erase (cf, uf); for (j = m; j < vec_len (cf->pager_index) && cf->pager_start < m; j++, cf->pager_start++) { pi = &cf->pager_index[j]; line = cf->pager_vector[pi->line] + pi->offset; unix_vlib_cli_output_cooked (cf, uf, line, pi->length); } /* if the last line didn't end in newline, add a newline */ if (pi && line[pi->length - 1] != '\n') unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1); unix_cli_pager_prompt (cf, uf); } else { if (action == UNIX_CLI_PARSE_ACTION_PAGER_NEXT) /* no more in buffer, exit, but only if it was <space> */ goto pager_quit; } break; case UNIX_CLI_PARSE_ACTION_PAGER_DN: case UNIX_CLI_PARSE_ACTION_PAGER_CRLF: /* display the next line of the buffer */ if (cf->pager_start < vec_len (cf->pager_index) - (cf->height - 1)) { u8 *line; unix_cli_pager_index_t *pi; unix_cli_pager_prompt_erase (cf, uf); pi = &cf->pager_index[cf->pager_start + (cf->height - 1)]; line = cf->pager_vector[pi->line] + pi->offset; unix_vlib_cli_output_cooked (cf, uf, line, pi->length); cf->pager_start++; /* if the last line didn't end in newline, add a newline */ if (line[pi->length - 1] != '\n') unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1); unix_cli_pager_prompt (cf, uf); } else { if (action == UNIX_CLI_PARSE_ACTION_PAGER_CRLF) /* no more in buffer, exit, but only if it was <enter> */ goto pager_quit; } break; case UNIX_CLI_PARSE_ACTION_PAGER_UP: /* scroll the page back one line */ if (cf->pager_start > 0) { u8 *line = NULL; unix_cli_pager_index_t *pi = NULL; cf->pager_start--; if (cf->ansi_capable) { pi = &cf->pager_index[cf->pager_start]; line = cf->pager_vector[pi->line] + pi->offset; unix_cli_pager_prompt_erase (cf, uf); unix_vlib_cli_output_cooked (cf, uf, (u8 *) ANSI_SCROLLDN, sizeof (ANSI_SCROLLDN) - 1); unix_vlib_cli_output_cooked (cf, uf, (u8 *) ANSI_SAVECURSOR, sizeof (ANSI_SAVECURSOR) - 1); unix_cli_ansi_cursor (cf, uf, 1, 1); unix_vlib_cli_output_cooked (cf, uf, (u8 *) ANSI_CLEARLINE, sizeof (ANSI_CLEARLINE) - 1); unix_vlib_cli_output_cooked (cf, uf, line, pi->length); unix_vlib_cli_output_cooked (cf, uf, (u8 *) ANSI_RESTCURSOR, sizeof (ANSI_RESTCURSOR) - 1); unix_cli_pager_prompt_erase (cf, uf); unix_cli_pager_prompt (cf, uf); } else { int m = cf->pager_start + (cf->height - 1); unix_cli_pager_prompt_erase (cf, uf); for (j = cf->pager_start; j < vec_len (cf->pager_index) && j < m; j++) { pi = &cf->pager_index[j]; line = cf->pager_vector[pi->line] + pi->offset; unix_vlib_cli_output_cooked (cf, uf, line, pi->length); } /* if the last line didn't end in newline, add a newline */ if (pi && line[pi->length - 1] != '\n') unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1); unix_cli_pager_prompt (cf, uf); } } break; case UNIX_CLI_PARSE_ACTION_PAGER_TOP: /* back to the first page of the buffer */ if (cf->pager_start > 0) { u8 *line = NULL; unix_cli_pager_index_t *pi = NULL; cf->pager_start = 0; int m = cf->pager_start + (cf->height - 1); unix_cli_pager_prompt_erase (cf, uf); for (j = cf->pager_start; j < vec_len (cf->pager_index) && j < m; j++) { pi = &cf->pager_index[j]; line = cf->pager_vector[pi->line] + pi->offset; unix_vlib_cli_output_cooked (cf, uf, line, pi->length); } /* if the last line didn't end in newline, add a newline */ if (pi && line[pi->length - 1] != '\n') unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1); unix_cli_pager_prompt (cf, uf); } break; case UNIX_CLI_PARSE_ACTION_PAGER_BOTTOM: /* skip to the last page of the buffer */ if (cf->pager_start < vec_len (cf->pager_index) - (cf->height - 1)) { u8 *line = NULL; unix_cli_pager_index_t *pi = NULL; cf->pager_start = vec_len (cf->pager_index) - (cf->height - 1); unix_cli_pager_prompt_erase (cf, uf); unix_cli_pager_message (cf, uf, "skipping", "\n"); for (j = cf->pager_start; j < vec_len (cf->pager_index); j++) { pi = &cf->pager_index[j]; line = cf->pager_vector[pi->line] + pi->offset; unix_vlib_cli_output_cooked (cf, uf, line, pi->length); } /* if the last line didn't end in newline, add a newline */ if (pi && line[pi->length - 1] != '\n') unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1); unix_cli_pager_prompt (cf, uf); } break; case UNIX_CLI_PARSE_ACTION_PAGER_PGUP: /* wander back one page in the buffer */ if (cf->pager_start > 0) { u8 *line = NULL; unix_cli_pager_index_t *pi = NULL; int m; if (cf->pager_start >= cf->height) cf->pager_start -= cf->height - 1; else cf->pager_start = 0; m = cf->pager_start + cf->height - 1; unix_cli_pager_prompt_erase (cf, uf); for (j = cf->pager_start; j < vec_len (cf->pager_index) && j < m; j++) { pi = &cf->pager_index[j]; line = cf->pager_vector[pi->line] + pi->offset; unix_vlib_cli_output_cooked (cf, uf, line, pi->length); } /* if the last line didn't end in newline, add a newline */ if (pi && line[pi->length - 1] != '\n') unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1); unix_cli_pager_prompt (cf, uf); } break; case UNIX_CLI_PARSE_ACTION_PAGER_REDRAW: /* Redraw the current pager screen */ unix_cli_pager_redraw (cf, uf); break; case UNIX_CLI_PARSE_ACTION_PAGER_SEARCH: /* search forwards in the buffer */ break; case UNIX_CLI_PARSE_ACTION_CRLF: crlf: unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1); if (cf->has_history && cf->history_limit) { if (cf->command_history && vec_len (cf->command_history) >= cf->history_limit) { vec_free (cf->command_history[0]); vec_delete (cf->command_history, 1, 0); } /* Don't add blank lines to the cmd history */ if (vec_len (cf->current_command)) { /* Don't duplicate the previous command */ j = vec_len (cf->command_history); if (j == 0 || (vec_len (cf->current_command) != vec_len (cf->command_history[j - 1]) || memcmp (cf->current_command, cf->command_history[j - 1], vec_len (cf->current_command)) != 0)) { /* copy the command to the history */ u8 *c = 0; vec_append (c, cf->current_command); vec_add1 (cf->command_history, c); cf->command_number++; } } cf->excursion = vec_len (cf->command_history); } cf->search_mode = 0; vec_reset_length (cf->search_key); cf->cursor = 0; return 0; case UNIX_CLI_PARSE_ACTION_PARTIALMATCH: case UNIX_CLI_PARSE_ACTION_NOMATCH: if (vec_len (cf->pager_index)) { /* no-op for now */ } else if (cf->has_history && cf->search_mode && isprint (input)) { int k, limit, offset; u8 *item; vec_add1 (cf->search_key, input); search_again: for (j = 0; j < vec_len (cf->command_history); j++) { if (cf->excursion > (i32) vec_len (cf->command_history) - 1) cf->excursion = 0; else if (cf->excursion < 0) cf->excursion = vec_len (cf->command_history) - 1; item = cf->command_history[cf->excursion]; limit = (vec_len (cf->search_key) > vec_len (item)) ? vec_len (item) : vec_len (cf->search_key); for (offset = 0; offset <= vec_len (item) - limit; offset++) { for (k = 0; k < limit; k++) { if (item[k + offset] != cf->search_key[k]) goto next_offset; } goto found_at_offset; next_offset: ; } goto next; found_at_offset: for (j = 0; j < vec_len (cf->current_command); j++) unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b \b", 3); vec_validate (cf->current_command, vec_len (item) - 1); clib_memcpy (cf->current_command, item, vec_len (item)); _vec_len (cf->current_command) = vec_len (item); unix_vlib_cli_output_cooked (cf, uf, cf->current_command, vec_len (cf->current_command)); cf->cursor = vec_len (cf->current_command); goto found; next: cf->excursion += cf->search_mode; } unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\nNo match...", 12); vec_reset_length (cf->search_key); vec_reset_length (cf->current_command); cf->search_mode = 0; cf->cursor = 0; goto crlf; } else if (isprint (input)) /* skip any errant control codes */ { if (cf->cursor == vec_len (cf->current_command)) { /* Append to end */ vec_add1 (cf->current_command, input); cf->cursor++; /* Echo the character back to the client */ unix_vlib_cli_output_raw (cf, uf, &input, 1); } else { /* Insert at cursor: resize +1 byte, move everything over */ j = vec_len (cf->current_command) - cf->cursor; vec_add1 (cf->current_command, (u8) 'A'); memmove (cf->current_command + cf->cursor + 1, cf->current_command + cf->cursor, j); cf->current_command[cf->cursor] = input; /* Redraw the line */ j++; unix_vlib_cli_output_raw (cf, uf, cf->current_command + cf->cursor, j); /* Put terminal cursor back */ while (--j) unix_vlib_cli_output_raw (cf, uf, (u8 *) "\b", 1); cf->cursor++; } } else { /* no-op - not printable or otherwise not actionable */ } found: break; case UNIX_CLI_PARSE_ACTION_TELNETIAC: break; } return 1; } /** @brief Process input bytes on a stream to provide line editing and * command history in the CLI. */ static int unix_cli_line_edit (unix_cli_main_t * cm, unix_main_t * um, unix_cli_file_t * cf) { unix_file_t *uf = pool_elt_at_index (um->file_pool, cf->unix_file_index); int i; for (i = 0; i < vec_len (cf->input_vector); i++) { unix_cli_parse_action_t action; i32 matched = 0; unix_cli_parse_actions_t *a; /* If we're in the pager mode, search the pager actions */ a = vec_len (cf->pager_index) ? unix_cli_parse_pager : unix_cli_parse_strings; /* See if the input buffer is some sort of control code */ action = unix_cli_match_action (a, &cf->input_vector[i], vec_len (cf->input_vector) - i, &matched); switch (action) { case UNIX_CLI_PARSE_ACTION_PARTIALMATCH: if (i) { /* There was a partial match which means we need more bytes * than the input buffer currently has. * Since the bytes before here have been processed, shift * the remaining contents to the start of the input buffer. */ vec_delete (cf->input_vector, i, 0); } return 1; /* wait for more */ case UNIX_CLI_PARSE_ACTION_TELNETIAC: /* process telnet options */ matched = unix_cli_process_telnet (um, cf, uf, cf->input_vector + i, vec_len (cf->input_vector) - i); if (matched < 0) { if (i) { /* There was a partial match which means we need more bytes * than the input buffer currently has. * Since the bytes before here have been processed, shift * the remaining contents to the start of the input buffer. */ vec_delete (cf->input_vector, i, 0); } return 1; /* wait for more */ } break; default: /* process the action */ if (!unix_cli_line_process_one (cm, um, cf, uf, cf->input_vector[i], action)) { /* CRLF found. Consume the bytes from the input_vector */ vec_delete (cf->input_vector, i + matched, 0); /* And tell our caller to execute cf->input_command */ return 0; } } i += matched; } vec_reset_length (cf->input_vector); return 1; } /** @brief Process input to a CLI session. */ static void unix_cli_process_input (unix_cli_main_t * cm, uword cli_file_index) { unix_main_t *um = &unix_main; unix_file_t *uf; unix_cli_file_t *cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index); unformat_input_t input; int vlib_parse_eval (u8 *); more: /* Try vlibplex first. Someday... */ if (0 && vlib_parse_eval (cf->input_vector) == 0) goto done; if (cf->line_mode) { /* just treat whatever we got as a complete line of input */ cf->current_command = cf->input_vector; } else { /* Line edit, echo, etc. */ if (unix_cli_line_edit (cm, um, cf)) /* want more input */ return; } if (um->log_fd) { static u8 *lv; vec_reset_length (lv); lv = format (lv, "%U[%d]: %v", format_timeval, 0 /* current bat-time */ , 0 /* current bat-format */ , cli_file_index, cf->input_vector); { int rv __attribute__ ((unused)) = write (um->log_fd, lv, vec_len (lv)); } } /* Copy our input command to a new string */ unformat_init_vector (&input, cf->current_command); /* Remove leading white space from input. */ (void) unformat (&input, ""); cm->current_input_file_index = cli_file_index; cf->pager_start = 0; /* start a new pager session */ if (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT) vlib_cli_input (um->vlib_main, &input, unix_vlib_cli_output, cli_file_index); /* Zero buffer since otherwise unformat_free will call vec_free on it. */ input.buffer = 0; unformat_free (&input); /* Re-fetch pointer since pool may have moved. */ cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index); uf = pool_elt_at_index (um->file_pool, cf->unix_file_index); done: /* reset vector; we'll re-use it later */ if (cf->line_mode) vec_reset_length (cf->input_vector); else vec_reset_length (cf->current_command); if (cf->no_pager == 2) { /* Pager was programmatically disabled */ unix_cli_pager_message (cf, uf, "pager buffer overflowed", "\n"); cf->no_pager = um->cli_no_pager; } if (vec_len (cf->pager_index) == 0 || vec_len (cf->pager_index) < cf->height) { /* There was no need for the pager */ unix_cli_pager_reset (cf); /* Prompt. */ unix_cli_cli_prompt (cf, uf); } else { /* Display the pager prompt */ unix_cli_pager_prompt (cf, uf); } /* Any residual data in the input vector? */ if (vec_len (cf->input_vector)) goto more; } /** Destroy a CLI session. * @note If we destroy the @c stdin session this additionally signals * the shutdown of VPP. */ static void unix_cli_kill (unix_cli_main_t * cm, uword cli_file_index) { unix_main_t *um = &unix_main; unix_cli_file_t *cf; unix_file_t *uf; int i; cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index); uf = pool_elt_at_index (um->file_pool, cf->unix_file_index); /* Quit/EOF on stdin means quit program. */ if (uf->file_descriptor == UNIX_CLI_STDIN_FD) clib_longjmp (&um->vlib_main->main_loop_exit, VLIB_MAIN_LOOP_EXIT_CLI); vec_free (cf->current_command); vec_free (cf->search_key); for (i = 0; i < vec_len (cf->command_history); i++) vec_free (cf->command_history[i]); vec_free (cf->command_history); unix_file_del (um, uf); unix_cli_file_free (cf); pool_put (cm->cli_file_pool, cf); } /** Handle system events. */ static uword unix_cli_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { unix_cli_main_t *cm = &unix_cli_main; uword i, *data = 0; while (1) { unix_cli_process_event_type_t event_type; vlib_process_wait_for_event (vm); event_type = vlib_process_get_events (vm, &data); switch (event_type) { case UNIX_CLI_PROCESS_EVENT_READ_READY: for (i = 0; i < vec_len (data); i++) unix_cli_process_input (cm, data[i]); break; case UNIX_CLI_PROCESS_EVENT_QUIT: /* Kill this process. */ for (i = 0; i < vec_len (data); i++) unix_cli_kill (cm, data[i]); goto done; } if (data) _vec_len (data) = 0; } done: vec_free (data); vlib_node_set_state (vm, rt->node_index, VLIB_NODE_STATE_DISABLED); /* Add node index so we can re-use this process later. */ vec_add1 (cm->unused_cli_process_node_indices, rt->node_index); return 0; } /** Called when a CLI session file descriptor can be written to without * blocking. */ static clib_error_t * unix_cli_write_ready (unix_file_t * uf) { unix_cli_main_t *cm = &unix_cli_main; unix_cli_file_t *cf; int n; cf = pool_elt_at_index (cm->cli_file_pool, uf->private_data); /* Flush output vector. */ n = write (uf->file_descriptor, cf->output_vector, vec_len (cf->output_vector)); if (n < 0 && errno != EAGAIN) return clib_error_return_unix (0, "write"); else if (n > 0) unix_cli_del_pending_output (uf, cf, n); return /* no error */ 0; } /** Called when a CLI session file descriptor has data to be read. */ static clib_error_t * unix_cli_read_ready (unix_file_t * uf) { unix_main_t *um = &unix_main; unix_cli_main_t *cm = &unix_cli_main; unix_cli_file_t *cf; uword l; int n, n_read, n_try; cf = pool_elt_at_index (cm->cli_file_pool, uf->private_data); n = n_try = 4096; while (n == n_try) { l = vec_len (cf->input_vector); vec_resize (cf->input_vector, l + n_try); n = read (uf->file_descriptor, cf->input_vector + l, n_try); /* Error? */ if (n < 0 && errno != EAGAIN) return clib_error_return_unix (0, "read"); n_read = n < 0 ? 0 : n; _vec_len (cf->input_vector) = l + n_read; } if (!(n < 0)) vlib_process_signal_event (um->vlib_main, cf->process_node_index, (n_read == 0 ? UNIX_CLI_PROCESS_EVENT_QUIT : UNIX_CLI_PROCESS_EVENT_READ_READY), /* event data */ uf->private_data); return /* no error */ 0; } /** Store a new CLI session. * @param name The name of the session. * @param fd The file descriptor for the session I/O. * @return The session ID. */ static u32 unix_cli_file_add (unix_cli_main_t * cm, char *name, int fd) { unix_main_t *um = &unix_main; unix_cli_file_t *cf; unix_file_t template = { 0 }; vlib_main_t *vm = um->vlib_main; vlib_node_t *n; name = (char *) format (0, "unix-cli-%s", name); if (vec_len (cm->unused_cli_process_node_indices) > 0) { uword l = vec_len (cm->unused_cli_process_node_indices); /* Find node and give it new name. */ n = vlib_get_node (vm, cm->unused_cli_process_node_indices[l - 1]); vec_free (n->name); n->name = (u8 *) name; vlib_node_set_state (vm, n->index, VLIB_NODE_STATE_POLLING); _vec_len (cm->unused_cli_process_node_indices) = l - 1; } else { static vlib_node_registration_t r = { .function = unix_cli_process, .type = VLIB_NODE_TYPE_PROCESS, .process_log2_n_stack_bytes = 16, }; r.name = name; vlib_register_node (vm, &r); vec_free (name); n = vlib_get_node (vm, r.index); } pool_get (cm->cli_file_pool, cf); memset (cf, 0, sizeof (*cf)); template.read_function = unix_cli_read_ready; template.write_function = unix_cli_write_ready; template.file_descriptor = fd; template.private_data = cf - cm->cli_file_pool; cf->process_node_index = n->index; cf->unix_file_index = unix_file_add (um, &template); cf->output_vector = 0; cf->input_vector = 0; vlib_start_process (vm, n->runtime_index); vlib_process_t *p = vlib_get_process_from_node (vm, n); p->output_function = unix_vlib_cli_output; p->output_function_arg = cf - cm->cli_file_pool; return cf - cm->cli_file_pool; } /** Telnet listening socket has a new connection. */ static clib_error_t * unix_cli_listen_read_ready (unix_file_t * uf) { unix_main_t *um = &unix_main; unix_cli_main_t *cm = &unix_cli_main; clib_socket_t *s = &um->cli_listen_socket; clib_socket_t client; char *client_name; clib_error_t *error; unix_cli_file_t *cf; u32 cf_index; error = clib_socket_accept (s, &client); if (error) return error; client_name = (char *) format (0, "%U%c", format_sockaddr, &client.peer, 0); cf_index = unix_cli_file_add (cm, client_name, client.fd); cf = pool_elt_at_index (cm->cli_file_pool, cf_index); /* No longer need CLIB version of socket. */ clib_socket_free (&client); vec_free (client_name); /* if we're supposed to run telnet session in character mode (default) */ if (um->cli_line_mode == 0) { /* * Set telnet client character mode, echo on, suppress "go-ahead". * Technically these should be negotiated, but this works. */ u8 charmode_option[] = { IAC, WONT, TELOPT_LINEMODE, /* server will do char-by-char */ IAC, DONT, TELOPT_LINEMODE, /* client should do char-by-char */ IAC, WILL, TELOPT_SGA, /* server willl supress GA */ IAC, DO, TELOPT_SGA, /* client should supress Go Ahead */ IAC, WILL, TELOPT_ECHO, /* server will do echo */ IAC, DONT, TELOPT_ECHO, /* client should not echo */ IAC, DO, TELOPT_TTYPE, /* client should tell us its term type */ IAC, SB, TELOPT_TTYPE, 1, IAC, SE, /* now tell me ttype */ IAC, DO, TELOPT_NAWS, /* client should tell us its window sz */ IAC, SB, TELOPT_NAWS, 1, IAC, SE, /* now tell me window size */ }; /* Enable history on this CLI */ cf->history_limit = um->cli_history_limit; cf->has_history = cf->history_limit != 0; /* Make sure this session is in line mode */ cf->line_mode = 0; /* We need CRLF */ cf->crlf_mode = 1; /* Setup the pager */ cf->no_pager = um->cli_no_pager; uf = pool_elt_at_index (um->file_pool, cf->unix_file_index); /* Send the telnet options */ unix_vlib_cli_output_raw (cf, uf, charmode_option, ARRAY_LEN (charmode_option)); /* In case the client doesn't negotiate terminal type, use * a timer to kick off the initial prompt. */ timer_call (unix_cli_file_welcome_timer, cf_index, 1); } return error; } /** The system terminal has informed us that the window size * has changed. */ static void unix_cli_resize_interrupt (int signum) { unix_main_t *um = &unix_main; unix_cli_main_t *cm = &unix_cli_main; unix_cli_file_t *cf = pool_elt_at_index (cm->cli_file_pool, cm->stdin_cli_file_index); unix_file_t *uf = pool_elt_at_index (um->file_pool, cf->unix_file_index); struct winsize ws; (void) signum; /* Terminal resized, fetch the new size */ if (ioctl (UNIX_CLI_STDIN_FD, TIOCGWINSZ, &ws) < 0) { /* "Should never happen..." */ clib_unix_warning ("TIOCGWINSZ"); /* We can't trust ws.XXX... */ return; } cf->width = ws.ws_col; cf->height = ws.ws_row; /* Reindex the pager buffer */ unix_cli_pager_reindex (cf); /* Redraw the page */ unix_cli_pager_redraw (cf, uf); } /** Handle configuration directives in the @em unix section. */ static clib_error_t * unix_cli_config (vlib_main_t * vm, unformat_input_t * input) { unix_main_t *um = &unix_main; unix_cli_main_t *cm = &unix_cli_main; int flags; clib_error_t *error = 0; unix_cli_file_t *cf; u32 cf_index; struct termios tio; struct sigaction sa; struct winsize ws; u8 *term; /* We depend on unix flags being set. */ if ((error = vlib_call_config_function (vm, unix_config))) return error; if (um->flags & UNIX_FLAG_INTERACTIVE) { /* Set stdin to be non-blocking. */ if ((flags = fcntl (UNIX_CLI_STDIN_FD, F_GETFL, 0)) < 0) flags = 0; (void) fcntl (UNIX_CLI_STDIN_FD, F_SETFL, flags | O_NONBLOCK); cf_index = unix_cli_file_add (cm, "stdin", UNIX_CLI_STDIN_FD); cf = pool_elt_at_index (cm->cli_file_pool, cf_index); cm->stdin_cli_file_index = cf_index; /* If stdin is a tty and we are using chacracter mode, enable * history on the CLI and set the tty line discipline accordingly. */ if (isatty (UNIX_CLI_STDIN_FD) && um->cli_line_mode == 0) { /* Capture terminal resize events */ memset (&sa, 0, sizeof (sa)); sa.sa_handler = unix_cli_resize_interrupt; if (sigaction (SIGWINCH, &sa, 0) < 0) clib_panic ("sigaction"); /* Retrieve the current terminal size */ ioctl (UNIX_CLI_STDIN_FD, TIOCGWINSZ, &ws); cf->width = ws.ws_col; cf->height = ws.ws_row; if (cf->width == 0 || cf->height == 0) /* We have a tty, but no size. Stick to line mode. */ goto notty; /* Setup the history */ cf->history_limit = um->cli_history_limit; cf->has_history = cf->history_limit != 0; /* Setup the pager */ cf->no_pager = um->cli_no_pager; /* We're going to be in char by char mode */ cf->line_mode = 0; /* Save the original tty state so we can restore it later */ tcgetattr (UNIX_CLI_STDIN_FD, &um->tio_stdin); um->tio_isset = 1; /* Tweak the tty settings */ tio = um->tio_stdin; /* echo off, canonical mode off, ext'd input processing off */ tio.c_lflag &= ~(ECHO | ICANON | IEXTEN); tio.c_cc[VMIN] = 1; /* 1 byte at a time */ tio.c_cc[VTIME] = 0; /* no timer */ tcsetattr (UNIX_CLI_STDIN_FD, TCSAFLUSH, &tio); /* See if we can do ANSI/VT100 output */ term = (u8 *) getenv ("TERM"); if (term != NULL) cf->ansi_capable = unix_cli_terminal_type (term, strlen ((char *) term)); } else { notty: /* No tty, so make sure these things are off */ cf->no_pager = 1; cf->history_limit = 0; cf->has_history = 0; cf->line_mode = 1; } /* Send banner and initial prompt */ unix_cli_file_welcome (cm, cf); } /* If we have socket config, LISTEN, otherwise, don't */ clib_socket_t *s = &um->cli_listen_socket; if (s->config && s->config[0] != 0) { /* CLI listen. */ unix_file_t template = { 0 }; s->flags = SOCKET_IS_SERVER; /* listen, don't connect */ error = clib_socket_init (s); if (error) return error; template.read_function = unix_cli_listen_read_ready; template.file_descriptor = s->fd; unix_file_add (um, &template); } /* Set CLI prompt. */ if (!cm->cli_prompt) cm->cli_prompt = format (0, "VLIB: "); return 0; } /*? * This module has no configurable parameters. ?*/ VLIB_CONFIG_FUNCTION (unix_cli_config, "unix-cli"); /** Called when VPP is shutting down, this restores the system * terminal state if previously saved. */ static clib_error_t * unix_cli_exit (vlib_main_t * vm) { unix_main_t *um = &unix_main; /* If stdin is a tty and we saved the tty state, reset the tty state */ if (isatty (UNIX_CLI_STDIN_FD) && um->tio_isset) tcsetattr (UNIX_CLI_STDIN_FD, TCSAFLUSH, &um->tio_stdin); return 0; } VLIB_MAIN_LOOP_EXIT_FUNCTION (unix_cli_exit); /** Set the CLI prompt. * @param prompt The C string to set the prompt to. * @note This setting is global; it impacts all current * and future CLI sessions. */ void vlib_unix_cli_set_prompt (char *prompt) { char *fmt = (prompt[strlen (prompt) - 1] == ' ') ? "%s" : "%s "; unix_cli_main_t *cm = &unix_cli_main; if (cm->cli_prompt) vec_free (cm->cli_prompt); cm->cli_prompt = format (0, fmt, prompt); } /** CLI command to quit the terminal session. * @note If this is a stdin session then this will * shutdown VPP also. */ static clib_error_t * unix_cli_quit (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unix_cli_main_t *cm = &unix_cli_main; vlib_process_signal_event (vm, vlib_current_process (vm), UNIX_CLI_PROCESS_EVENT_QUIT, cm->current_input_file_index); return 0; } /*? * Terminates the current CLI session. * * If VPP is running in @em interactive mode and this is the console session * (that is, the session on @c stdin) then this will also terminate VPP. ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (unix_cli_quit_command, static) = { .path = "quit", .short_help = "Exit CLI", .function = unix_cli_quit, }; /* *INDENT-ON* */ /** CLI command to execute a VPP command script. */ static clib_error_t * unix_cli_exec (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { char *file_name; int fd; unformat_input_t sub_input; clib_error_t *error; file_name = 0; fd = -1; error = 0; if (!unformat (input, "%s", &file_name)) { error = clib_error_return (0, "expecting file name, got `%U'", format_unformat_error, input); goto done; } fd = open (file_name, O_RDONLY); if (fd < 0) { error = clib_error_return_unix (0, "failed to open `%s'", file_name); goto done; } /* Make sure its a regular file. */ { struct stat s; if (fstat (fd, &s) < 0) { error = clib_error_return_unix (0, "failed to stat `%s'", file_name); goto done; } if (!(S_ISREG (s.st_mode) || S_ISLNK (s.st_mode))) { error = clib_error_return (0, "not a regular file `%s'", file_name); goto done; } } unformat_init_unix_file (&sub_input, fd); vlib_cli_input (vm, &sub_input, 0, 0); unformat_free (&sub_input); done: if (fd > 0) close (fd); vec_free (file_name); return error; } /*? * Executes a sequence of CLI commands which are read from a file. * * If a command is unrecognised or otherwise invalid then the usual CLI * feedback will be generated, however execution of subsequent commands * from the file will continue. ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (cli_exec, static) = { .path = "exec", .short_help = "Execute commands from file", .function = unix_cli_exec, .is_mp_safe = 1, }; /* *INDENT-ON* */ /** CLI command to show various unix error statistics. */ static clib_error_t * unix_show_errors (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unix_main_t *um = &unix_main; clib_error_t *error = 0; int i, n_errors_to_show; unix_error_history_t *unix_errors = 0; n_errors_to_show = 1 << 30; if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (!unformat (input, "%d", &n_errors_to_show)) { error = clib_error_return (0, "expecting integer number of errors to show, got `%U'", format_unformat_error, input); goto done; } } n_errors_to_show = clib_min (ARRAY_LEN (um->error_history), n_errors_to_show); i = um->error_history_index > 0 ? um->error_history_index - 1 : ARRAY_LEN (um->error_history) - 1; while (n_errors_to_show > 0) { unix_error_history_t *eh = um->error_history + i; if (!eh->error) break; vec_add1 (unix_errors, eh[0]); n_errors_to_show -= 1; if (i == 0) i = ARRAY_LEN (um->error_history) - 1; else i--; } if (vec_len (unix_errors) == 0) vlib_cli_output (vm, "no Unix errors so far"); else { vlib_cli_output (vm, "%Ld total errors seen", um->n_total_errors); for (i = vec_len (unix_errors) - 1; i >= 0; i--) { unix_error_history_t *eh = vec_elt_at_index (unix_errors, i); vlib_cli_output (vm, "%U: %U", format_time_interval, "h:m:s:u", eh->time, format_clib_error, eh->error); } vlib_cli_output (vm, "%U: time now", format_time_interval, "h:m:s:u", vlib_time_now (vm)); } done: vec_free (unix_errors); return error; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (cli_unix_show_errors, static) = { .path = "show unix-errors", .short_help = "Show Unix system call error history", .function = unix_show_errors, }; /* *INDENT-ON* */ /** CLI command to show session command history. */ static clib_error_t * unix_cli_show_history (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unix_cli_main_t *cm = &unix_cli_main; unix_cli_file_t *cf; int i, j; cf = pool_elt_at_index (cm->cli_file_pool, cm->current_input_file_index); if (cf->has_history && cf->history_limit) { i = 1 + cf->command_number - vec_len (cf->command_history); for (j = 0; j < vec_len (cf->command_history); j++) vlib_cli_output (vm, "%d %v\n", i + j, cf->command_history[j]); } else { vlib_cli_output (vm, "History not enabled.\n"); } return 0; } /*? * Displays the command history for the current session, if any. ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (cli_unix_cli_show_history, static) = { .path = "history", .short_help = "Show current session command history", .function = unix_cli_show_history, }; /* *INDENT-ON* */ /** CLI command to show terminal status. */ static clib_error_t * unix_cli_show_terminal (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unix_main_t *um = &unix_main; unix_cli_main_t *cm = &unix_cli_main; unix_cli_file_t *cf; vlib_node_t *n; cf = pool_elt_at_index (cm->cli_file_pool, cm->current_input_file_index); n = vlib_get_node (vm, cf->process_node_index); vlib_cli_output (vm, "Terminal name: %v\n", n->name); vlib_cli_output (vm, "Terminal mode: %s\n", cf->line_mode ? "line-by-line" : "char-by-char"); vlib_cli_output (vm, "Terminal width: %d\n", cf->width); vlib_cli_output (vm, "Terminal height: %d\n", cf->height); vlib_cli_output (vm, "ANSI capable: %s\n", cf->ansi_capable ? "yes" : "no"); vlib_cli_output (vm, "History enabled: %s%s\n", cf->has_history ? "yes" : "no", !cf->has_history || cf->history_limit ? "" : " (disabled by history limit)"); if (cf->has_history) vlib_cli_output (vm, "History limit: %d\n", cf->history_limit); vlib_cli_output (vm, "Pager enabled: %s%s%s\n", cf->no_pager ? "no" : "yes", cf->no_pager || cf->height ? "" : " (disabled by terminal height)", cf->no_pager || um->cli_pager_buffer_limit ? "" : " (disabled by buffer limit)"); if (!cf->no_pager) vlib_cli_output (vm, "Pager limit: %d\n", um->cli_pager_buffer_limit); vlib_cli_output (vm, "CRLF mode: %s\n", cf->crlf_mode ? "CR+LF" : "LF"); return 0; } /*? * Displays various information about the state of the current terminal * session. * * @cliexpar * @cliexstart{show terminal} * Terminal name: unix-cli-stdin * Terminal mode: char-by-char * Terminal width: 123 * Terminal height: 48 * ANSI capable: yes * History enabled: yes * History limit: 50 * Pager enabled: yes * Pager limit: 100000 * CRLF mode: LF * @cliexend ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (cli_unix_cli_show_terminal, static) = { .path = "show terminal", .short_help = "Show current session terminal settings", .function = unix_cli_show_terminal, }; /* *INDENT-ON* */ /** CLI command to set terminal pager settings. */ static clib_error_t * unix_cli_set_terminal_pager (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unix_main_t *um = &unix_main; unix_cli_main_t *cm = &unix_cli_main; unix_cli_file_t *cf; unformat_input_t _line_input, *line_input = &_line_input; clib_error_t *error = 0; if (!unformat_user (input, unformat_line_input, line_input)) return 0; cf = pool_elt_at_index (cm->cli_file_pool, cm->current_input_file_index); while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "on")) cf->no_pager = 0; else if (unformat (line_input, "off")) cf->no_pager = 1; else if (unformat (line_input, "limit %u", &um->cli_pager_buffer_limit)) vlib_cli_output (vm, "Pager limit set to %u lines; note, this is global.\n", um->cli_pager_buffer_limit); else { error = clib_error_return (0, "unknown parameter: `%U`", format_unformat_error, line_input); goto done; } } done: unformat_free (line_input); return error; } /*? * Enables or disables the terminal pager for this session. Generally * this defaults to enabled. * * Additionally allows the pager buffer size to be set; though note that * this value is set globally and not per session. ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (cli_unix_cli_set_terminal_pager, static) = { .path = "set terminal pager", .short_help = "set terminal pager [on|off] [limit <lines>]", .function = unix_cli_set_terminal_pager, }; /* *INDENT-ON* */ /** CLI command to set terminal history settings. */ static clib_error_t * unix_cli_set_terminal_history (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unix_cli_main_t *cm = &unix_cli_main; unix_cli_file_t *cf; unformat_input_t _line_input, *line_input = &_line_input; u32 limit; clib_error_t *error = 0; if (!unformat_user (input, unformat_line_input, line_input)) return 0; cf = pool_elt_at_index (cm->cli_file_pool, cm->current_input_file_index); while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "on")) cf->has_history = 1; else if (unformat (line_input, "off")) cf->has_history = 0; else if (unformat (line_input, "limit %u", &cf->history_limit)) ; else { error = clib_error_return (0, "unknown parameter: `%U`", format_unformat_error, line_input); goto done; } /* If we reduced history size, or turned it off, purge the history */ limit = cf->has_history ? cf->history_limit : 0; while (cf->command_history && vec_len (cf->command_history) >= limit) { vec_free (cf->command_history[0]); vec_delete (cf->command_history, 1, 0); } } done: unformat_free (line_input); return error; } /*? * Enables or disables the command history function of the current * terminal. Generally this defaults to enabled. * * This command also allows the maximum size of the history buffer for * this session to be altered. ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (cli_unix_cli_set_terminal_history, static) = { .path = "set terminal history", .short_help = "set terminal history [on|off] [limit <lines>]", .function = unix_cli_set_terminal_history, }; /* *INDENT-ON* */ /** CLI command to set terminal ANSI settings. */ static clib_error_t * unix_cli_set_terminal_ansi (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unix_cli_main_t *cm = &unix_cli_main; unix_cli_file_t *cf; cf = pool_elt_at_index (cm->cli_file_pool, cm->current_input_file_index); if (unformat (input, "on")) cf->ansi_capable = 1; else if (unformat (input, "off")) cf->ansi_capable = 0; else return clib_error_return (0, "unknown parameter: `%U`", format_unformat_error, input); return 0; } /*? * Enables or disables the use of ANSI control sequences by this terminal. * The default will vary based on terminal detection at the start of the * session. * * ANSI control sequences are used in a small number of places to provide, * for example, color text output and to control the cursor in the pager. ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (cli_unix_cli_set_terminal_ansi, static) = { .path = "set terminal ansi", .short_help = "set terminal ansi [on|off]", .function = unix_cli_set_terminal_ansi, }; /* *INDENT-ON* */ static clib_error_t * unix_cli_init (vlib_main_t * vm) { return 0; } VLIB_INIT_FUNCTION (unix_cli_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */