* 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;
+ }
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
+ break;
-#include <fcntl.h>
-#include <sys/stat.h>
-#include <termios.h>
-#include <unistd.h>
-#include <arpa/telnet.h>
+ 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;
-typedef struct {
- u32 unix_file_index;
+ 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;
- /* Vector of output pending write to file descriptor. */
- u8 * output_vector;
+ 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;
- /* Vector of input saved by Unix input node to be processed by
- CLI process. */
- u8 * input_vector;
+ case UNIX_CLI_PARSE_ACTION_PAGER_REDRAW:
+ /* Redraw the current pager screen */
+ unix_cli_pager_redraw (cf, uf);
+ break;
- u8 has_history;
- u8 ** command_history;
- u8 * current_command;
- i32 excursion;
- u32 history_limit;
- u8 * search_key;
- int search_mode;
+ case UNIX_CLI_PARSE_ACTION_PAGER_SEARCH:
+ /* search forwards in the buffer */
+ break;
- u32 process_node_index;
-} unix_cli_file_t;
-always_inline void
-unix_cli_file_free (unix_cli_file_t * f)
-{
- vec_free (f->output_vector);
- vec_free (f->input_vector);
-}
+ case UNIX_CLI_PARSE_ACTION_CRLF:
+ crlf:
+ unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
-typedef struct {
- /* Prompt string for CLI. */
- u8 * cli_prompt;
+ 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);
+ }
- unix_cli_file_t * cli_file_pool;
+ cf->search_mode = 0;
+ vec_reset_length (cf->search_key);
+ cf->cursor = 0;
- u32 * unused_cli_process_node_indices;
+ return 0;
- /* File pool index of current input. */
- u32 current_input_file_index;
-} unix_cli_main_t;
+ 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 */
+ }
-static unix_cli_main_t unix_cli_main;
+ found:
-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;
+ break;
- 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);
+ case UNIX_CLI_PARSE_ACTION_TELNETIAC:
+ break;
}
+ return 1;
}
-static void
-unix_cli_del_pending_output (unix_file_t * uf,
- unix_cli_file_t * cf,
- uword n_bytes)
+/** @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_main_t * um = &unix_main;
+ unix_file_t *uf = pool_elt_at_index (um->file_pool, cf->unix_file_index);
+ int i;
- vec_delete (cf->output_vector, n_bytes, 0);
- if (vec_len (cf->output_vector) <= 0)
+ for (i = 0; i < vec_len (cf->input_vector); i++)
{
- 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);
- }
-}
+ unix_cli_parse_action_t action;
+ i32 matched = 0;
+ unix_cli_parse_actions_t *a;
-/* VLIB cli output function. */
-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;
- int n;
-
- cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index);
- uf = pool_elt_at_index (um->file_pool, cf->unix_file_index);
- 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");
+ /* 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;
- else if ((word) n < (word) buffer_bytes)
- {
- if (n < 0) n = 0;
- unix_cli_add_pending_output (uf, cf, buffer + n, buffer_bytes - n);
- }
-}
+ /* 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);
-static int unix_cli_line_edit (unix_main_t * um, unix_cli_file_t * cf)
-{
- unix_file_t * uf = pool_elt_at_index (um->file_pool, cf->unix_file_index);
- u8 * prev;
- int i, j, delta;
+ 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;
- for (i = 0; i < vec_len (cf->input_vector); i++)
- {
- switch (cf->input_vector[i])
- {
- case 0:
- continue;
-
- case '?':
- /* Erase the current command (if any) plus ?*/
- for (j = 0; j < (vec_len (cf->current_command)+1); j++)
- unix_cli_add_pending_output (uf, cf, (u8 *) "\b \b", 3);
-
- unix_cli_add_pending_output (uf, cf, (u8 *) "\r\nHistory:\r\n", 12);
-
- for (j = 0; j < vec_len (cf->command_history); j++)
- {
- unix_cli_add_pending_output (uf, cf, cf->command_history[j],
- vec_len(cf->command_history[j]));
- unix_cli_add_pending_output (uf, cf, (u8 *) "\r\n", 2);
- }
- goto crlf;
-
- /* ^R - reverse search */
- case 'R' - '@':
- case 'S' - '@':
- if (cf->search_mode == 0)
- {
- /* Erase the current command (if any) plus ^R */
- for (j = 0; j < (vec_len (cf->current_command)+2); j++)
- unix_cli_add_pending_output (uf, cf, (u8 *) "\b \b", 3);
-
- vec_reset_length (cf->search_key);
- vec_reset_length (cf->current_command);
- if (cf->input_vector[i] == 'R' - '@')
- cf->search_mode = -1;
- else
- cf->search_mode = 1;
- }
- else
- {
- if (cf->input_vector[i] == 'R' - '@')
- cf->search_mode = -1;
- else
- cf->search_mode = 1;
-
- cf->excursion += cf->search_mode;
- unix_cli_add_pending_output (uf, cf, (u8 *) "\b \b", 3);
- goto search_again;
- }
- break;
-
- /* ^U - line-kill */
- case 'U'-'@':
- /* Erase the command, plus ^U */
- for (j = 0; j < (vec_len (cf->current_command)+2); j++)
- unix_cli_add_pending_output (uf, cf, (u8 *) "\b \b", 3);
- vec_reset_length (cf->current_command);
- cf->search_mode = 0;
- continue;
-
- /* ^P - previous, ^N - next */
- case 'P' - '@':
- case 'N' - '@':
- cf->search_mode = 0;
- /* Erase the command, plus ^P */
- for (j = 0; j < (vec_len (cf->current_command)+2); j++)
- unix_cli_add_pending_output (uf, cf, (u8 *) "\b \b", 3);
- vec_reset_length (cf->current_command);
- if (vec_len (cf->command_history))
- {
- if (cf->input_vector[i] == 'P' - '@')
- delta = -1;
- else
- delta = 1;
-
- cf->excursion += delta;
-
- 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;
-
- prev = cf->command_history [cf->excursion];
- vec_validate (cf->current_command, vec_len(prev)-1);
-
- memcpy (cf->current_command, prev, vec_len(prev));
- _vec_len (cf->current_command) = vec_len(prev);
- unix_cli_add_pending_output (uf, cf, cf->current_command,
- vec_len (cf->current_command));
- break;
- }
- break;
-
- case 0x7f:
- case 'H' - '@':
- for (j = 0; j < 2; j++)
- unix_cli_add_pending_output (uf, cf, (u8 *) "\b \b", 3);
- if (vec_len (cf->current_command))
- {
- unix_cli_add_pending_output (uf, cf, (u8 *) "\b \b", 3);
- _vec_len (cf->current_command)--;
- }
- cf->search_mode = 0;
- cf->excursion = 0;
- cf->search_mode = 0;
- vec_reset_length (cf->search_key);
- break;
-
- case '\r':
- case '\n':
- crlf:
- vec_add1 (cf->current_command, '\r');
- vec_add1 (cf->current_command, '\n');
- unix_cli_add_pending_output (uf, cf, (u8 *) "\b\b \b\b\r\n", 8);
-
- vec_validate (cf->input_vector, vec_len(cf->current_command)-1);
- memcpy (cf->input_vector, cf->current_command,
- vec_len(cf->current_command));
- _vec_len(cf->input_vector) = _vec_len (cf->current_command);
-
- if (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) > 2)
- {
- _vec_len (cf->current_command) -= 2;
- vec_add1 (cf->command_history, cf->current_command);
- cf->current_command = 0;
- }
- else
- vec_reset_length (cf->current_command);
- cf->excursion = 0;
- cf->search_mode = 0;
- vec_reset_length (cf->search_key);
- return 0;
-
- /* telnet "mode character" blort, echo but don't process. */
- case 0xff:
- unix_cli_add_pending_output (uf, cf, cf->input_vector + i,
- 6);
- i += 6;
- continue;
-
- default:
- if (cf->search_mode)
- {
- int j, k, limit, offset;
- u8 * item;
-
- vec_add1 (cf->search_key, cf->input_vector[i]);
-
- 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)+1; j++)
- unix_cli_add_pending_output (uf, cf, (u8 *) "\b \b", 3);
-
- vec_validate (cf->current_command, vec_len(item)-1);
-
- memcpy (cf->current_command, item, vec_len(item));
- _vec_len (cf->current_command) = vec_len(item);
- unix_cli_add_pending_output (uf, cf, cf->current_command,
- vec_len (cf->current_command));
- goto found;
-
- next:
- cf->excursion += cf->search_mode;
- }
-
- unix_cli_add_pending_output (uf, cf, (u8 *)"\r\nno match..", 12);
- vec_reset_length (cf->search_key);
- vec_reset_length (cf->current_command);
- cf->search_mode = 0;
- goto crlf;
- }
- else
- vec_add1 (cf->current_command, cf->input_vector[i]);
-
- found:
-
- break;
- }
- }
- vec_reset_length(cf->input_vector);
+ 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;
}
-static void unix_cli_process_input (unix_cli_main_t * cm, uword cli_file_index)
+/** @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);
+ 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;
+ goto done;
- /* Line edit, echo, etc. */
- if (cf->has_history && unix_cli_line_edit (um, cf))
- return;
+ 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;
+ 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);
+ 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));
+ int rv __attribute__ ((unused)) =
+ write (um->log_fd, lv, vec_len (lv));
}
}
- unformat_init_vector (&input, cf->input_vector);
+ /* 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);
-
- /* Re-fetch pointer since pool may have moved. */
- cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index);
+ 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-use input vector. */
+ /* 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:
- _vec_len (cf->input_vector) = 0;
+ /* 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);
- /* Prompt. */
- uf = pool_elt_at_index (um->file_pool, cf->unix_file_index);
- unix_cli_add_pending_output (uf, cf,
- cm->cli_prompt,
- vec_len (cm->cli_prompt));
+ 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;
}
-static void unix_cli_kill (unix_cli_main_t * cm, uword cli_file_index)
+/** 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;
+ 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 == 0)
+ 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[i]);
vec_free (cf->command_history);
pool_put (cm->cli_file_pool, cf);
}
-typedef enum {
- UNIX_CLI_PROCESS_EVENT_READ_READY,
- UNIX_CLI_PROCESS_EVENT_QUIT,
-} unix_cli_process_event_type_t;
-
+/** Handle system events. */
static uword
unix_cli_process (vlib_main_t * vm,
- vlib_node_runtime_t * rt,
- vlib_frame_t * f)
+ vlib_node_runtime_t * rt, vlib_frame_t * f)
{
- unix_cli_main_t * cm = &unix_cli_main;
- uword i, * data = 0;
+ unix_cli_main_t *cm = &unix_cli_main;
+ uword i, *data = 0;
while (1)
{
_vec_len (data) = 0;
}
- done:
+done:
vec_free (data);
vlib_node_set_state (vm, rt->node_index, VLIB_NODE_STATE_DISABLED);
return 0;
}
-static clib_error_t * unix_cli_write_ready (unix_file_t * uf)
+/** 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;
+ 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);
return /* no error */ 0;
}
-static clib_error_t * unix_cli_read_ready (unix_file_t * uf)
+/** 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;
+ 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) {
+ while (n == n_try)
+ {
l = vec_len (cf->input_vector);
vec_resize (cf->input_vector, l + n_try);
/* Error? */
if (n < 0 && errno != EAGAIN)
- return clib_error_return_unix (0, "read");
-
+ return clib_error_return_unix (0, "read");
+
n_read = n < 0 ? 0 : n;
_vec_len (cf->input_vector) = l + n_read;
- }
+ }
- if (! (n < 0))
+ if (!(n < 0))
vlib_process_signal_event (um->vlib_main,
cf->process_node_index,
(n_read == 0
return /* no error */ 0;
}
-static u32 unix_cli_file_add (unix_cli_main_t * cm, char * name, int fd)
+/** 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 * uf, template = {0};
- vlib_main_t * vm = um->vlib_main;
- vlib_node_t * n;
+ 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);
static vlib_node_registration_t r = {
.function = unix_cli_process,
.type = VLIB_NODE_TYPE_PROCESS,
- .process_log2_n_stack_bytes = 14,
+ .process_log2_n_stack_bytes = 16,
};
r.name = name;
cf->output_vector = 0;
cf->input_vector = 0;
- uf = pool_elt_at_index (um->file_pool, cf->unix_file_index);
+ vlib_start_process (vm, n->runtime_index);
- /* Prompt. */
- unix_cli_add_pending_output (uf, cf,
- cm->cli_prompt, vec_len (cm->cli_prompt));
+ 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;
- vlib_start_process (vm, n->runtime_index);
return cf - cm->cli_file_pool;
}
-static clib_error_t * unix_cli_listen_read_ready (unix_file_t * uf)
+/** 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;
+ 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;
+ char *client_name;
+ clib_error_t *error;
+ unix_cli_file_t *cf;
u32 cf_index;
error = clib_socket_accept (s, &client);
/* if we're supposed to run telnet session in character mode (default) */
if (um->cli_line_mode == 0)
{
- u8 charmode_option[6];
+ /*
+ * 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 */
+ };
- cf->has_history = 1;
- cf->history_limit = um->cli_history_limit ? um->cli_history_limit : 50;
+ /* Enable history on this CLI */
+ cf->history_limit = um->cli_history_limit;
+ cf->has_history = cf->history_limit != 0;
- /*
- * Set telnet client character mode, echo on, suppress "go-ahead"
- * Empirically, this sequence works. YMMV.
- */
+ /* 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;
- /* Tell the client no linemode, echo */
- charmode_option[0] = IAC;
- charmode_option[1] = DONT;
- charmode_option[2] = TELOPT_LINEMODE;
- charmode_option[3] = IAC;
- charmode_option[4] = DO;
- charmode_option[5] = TELOPT_SGA;
-
uf = pool_elt_at_index (um->file_pool, cf->unix_file_index);
-
- unix_cli_add_pending_output (uf, cf, charmode_option,
- ARRAY_LEN(charmode_option));
+
+ /* 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, standard_input_fd;
- clib_error_t * error;
+ 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)))
if (um->flags & UNIX_FLAG_INTERACTIVE)
{
- standard_input_fd = 0;
-
/* Set stdin to be non-blocking. */
- if ((flags = fcntl (standard_input_fd, F_GETFL, 0)) < 0)
+ if ((flags = fcntl (UNIX_CLI_STDIN_FD, F_GETFL, 0)) < 0)
flags = 0;
- fcntl (standard_input_fd, F_SETFL, flags | O_NONBLOCK);
+ (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;
+ }
- unix_cli_file_add (cm, "stdin", standard_input_fd);
+ /* Send banner and initial prompt */
+ unix_cli_file_welcome (cm, cf);
}
- {
- /* CLI listen. */
- clib_socket_t * s = &um->cli_listen_socket;
- unix_file_t template = {0};
+ /* 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 */
+ s->flags = SOCKET_IS_SERVER; /* listen, don't connect */
+ error = clib_socket_init (s);
- error = clib_socket_init (s);
- if (error)
- return error;
+ if (error)
+ return error;
- template.read_function = unix_cli_listen_read_ready;
- template.file_descriptor = s->fd;
+ template.read_function = unix_cli_listen_read_ready;
+ template.file_descriptor = s->fd;
- unix_file_add (um, &template);
- }
+ unix_file_add (um, &template);
+ }
/* Set CLI prompt. */
- if (! cm->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");
-void vlib_unix_cli_set_prompt (char * prompt)
+/** 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;
+ 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)
+ unformat_input_t * input, vlib_cli_command_t * cmd)
{
- unix_cli_main_t * cm = &unix_cli_main;
+ unix_cli_main_t *cm = &unix_cli_main;
vlib_process_signal_event (vm,
vlib_current_process (vm),
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)
+ unformat_input_t * input, vlib_cli_command_t * cmd)
{
- char * file_name;
+ char *file_name;
int fd;
unformat_input_t sub_input;
- clib_error_t * error;
+ clib_error_t *error;
file_name = 0;
fd = -1;
error = 0;
- if (! unformat (input, "%s", &file_name))
+ if (!unformat (input, "%s", &file_name))
{
error = clib_error_return (0, "expecting file name, got `%U'",
format_unformat_error, input);
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)))
+
+ 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;
vlib_cli_input (vm, &sub_input, 0, 0);
unformat_free (&sub_input);
- done:
+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)
+ unformat_input_t * input, vlib_cli_command_t * cmd)
{
- unix_main_t * um = &unix_main;
- clib_error_t * error = 0;
+ unix_main_t *um = &unix_main;
+ clib_error_t *error = 0;
int i, n_errors_to_show;
- unix_error_history_t * unix_errors = 0;
+ 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))
+ 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);
+ 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);
+ 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;
+ 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;
+ unix_error_history_t *eh = um->error_history + i;
- if (! eh->error)
+ if (!eh->error)
break;
vec_add1 (unix_errors, eh[0]);
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);
+ 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);
format_time_interval, "h:m:s:u", vlib_time_now (vm));
}
- done:
+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;
+
+ 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
+ return clib_error_return (0, "unknown parameter: `%U`",
+ format_unformat_error, line_input);
+ }
+
+ unformat_free (line_input);
+
+ return 0;
+}
+
+/*?
+ * 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;
+
+ 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
+ return clib_error_return (0, "unknown parameter: `%U`",
+ format_unformat_error, line_input);
+
+ /* 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);
+ }
+ }
+
+ unformat_free (line_input);
+
+ return 0;
+}
+
+/*?
+ * 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)
}
VLIB_INIT_FUNCTION (unix_cli_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff