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https://gitlab.nic.cz/labs/bird.git
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22f54eaee6
Memory allocation is a fragile part of BIRD and we need checking that everybody is using the resource pools in an appropriate way. To assure this, all the resource pools are associated with locking domains and every resource manipulation is thoroughly checked whether the appropriate locking domain is locked. With transitive resource manipulation like resource dumping or mass free operations, domains are locked and unlocked on the go, thus we require pool domains to have higher order than their parent to allow for this transitive operations. Adding pool locking revealed some cases of insecure memory manipulation and this commit fixes that as well.
88 lines
2.4 KiB
C
88 lines
2.4 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/lists.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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struct birdsock *sock; /* Underlying socket */
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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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int (*cleanup)(struct cli *c); /* Return 0 if finished and cli may be freed immediately.
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Otherwise return 1 and call rfree(c->pool) when appropriate. */
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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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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(struct birdsock *);
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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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