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4c19a8a984
When there is a continuos stream of CLI commands, cli_get_command() always returns 1 (there is a new command). Anyway, the socket receive buffer was reset only when there was no command at all, leading to a strange behavior: after a while, the CLI receive buffer came to its end, then read() was called with zero size buffer, it returned 0 which was interpreted as EOF. The patch fixes that by resetting the buffer position after each command and moving remaining data at the beginning of buffer. Thanks to Maria Matejka for examining the bug and for the original bugfix.
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/*
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* BIRD Internet Routing Daemon -- Command-Line Interface
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*
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* (c) 1999--2000 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_CLI_H_
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#define _BIRD_CLI_H_
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#include "lib/resource.h"
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#include "lib/event.h"
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#define CLI_RX_BUF_SIZE 4096
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#define CLI_TX_BUF_SIZE 4096
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#define CLI_MAX_ASYNC_QUEUE 4096
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#define CLI_MSG_SIZE 500
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#define CLI_LINE_SIZE 512
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struct cli_out {
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struct cli_out *next;
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byte *wpos, *outpos, *end;
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byte buf[0];
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};
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typedef struct cli {
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node n; /* Node in list of all log hooks */
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pool *pool;
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void *priv; /* Private to sysdep layer */
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byte *rx_buf, *rx_pos; /* sysdep */
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struct cli_out *tx_buf, *tx_pos, *tx_write;
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event *event;
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void (*cont)(struct cli *c);
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void (*cleanup)(struct cli *c);
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void *rover; /* Private to continuation routine */
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int last_reply;
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int restricted; /* CLI is restricted to read-only commands */
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struct linpool *parser_pool; /* Pool used during parsing */
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struct linpool *show_pool; /* Pool used during route show */
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byte *ring_buf; /* Ring buffer for asynchronous messages */
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byte *ring_end, *ring_read, *ring_write; /* Pointers to the ring buffer */
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uint ring_overflow; /* Counter of ring overflows */
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uint log_mask; /* Mask of allowed message levels */
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uint log_threshold; /* When free < log_threshold, store only important messages */
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uint async_msg_size; /* Total size of async messages queued in tx_buf */
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} cli;
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extern pool *cli_pool;
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extern struct cli *this_cli; /* Used during parsing */
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#define CLI_ASYNC_CODE 10000
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/* Functions to be called by command handlers */
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void cli_printf(cli *, int, char *, ...);
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#define cli_msg(x...) cli_printf(this_cli, x)
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void cli_set_log_echo(cli *, uint mask, uint size);
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static inline void cli_separator(cli *c)
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{ if (c->last_reply) cli_printf(c, -c->last_reply, ""); };
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/* Functions provided to sysdep layer */
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cli *cli_new(void *);
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void cli_init(void);
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void cli_free(cli *);
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void cli_kick(cli *);
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void cli_written(cli *);
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void cli_echo(uint class, byte *msg);
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static inline int cli_access_restricted(void)
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{
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if (this_cli && this_cli->restricted)
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return (cli_printf(this_cli, 8007, "Access denied"), 1);
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else
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return 0;
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}
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/* Functions provided by sysdep layer */
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void cli_write_trigger(cli *);
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int cli_get_command(cli *);
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#endif
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