3311ff84ea
ntp 4.2.8p5 Reviewed by: cy, roberto Relnotes: yes Differential Revision: https://reviews.freebsd.org/D4828
159 lines
4.7 KiB
C
159 lines
4.7 KiB
C
/*
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* ntpq.h - definitions of interest to ntpq
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*/
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include "ntp_fp.h"
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#include "ntp.h"
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#include "ntp_stdlib.h"
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#include "ntp_string.h"
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#include "ntp_malloc.h"
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#include "ntp_assert.h"
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#include "ntp_control.h"
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#include "lib_strbuf.h"
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/*
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* Maximum number of arguments
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*/
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#define MAXARGS 4
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/*
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* Limit on packets in a single response. Increasing this value to
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* 96 will marginally speed "mrulist" operation on lossless networks
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* but it has been observed to cause loss on WiFi networks and with
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* an IPv6 go6.net tunnel over UDP. That loss causes the request
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* row limit to be cut in half, and it grows back very slowly to
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* ensure forward progress is made and loss isn't triggered too quickly
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* afterward. While the lossless case gains only marginally with
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* MAXFRAGS == 96, the lossy case is a lot slower due to the repeated
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* timeouts. Empirally, MAXFRAGS == 32 avoids most of the routine loss
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* on both the WiFi and UDP v6 tunnel tests and seems a good compromise.
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* This suggests some device in the path has a limit of 32 ~512 byte UDP
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* packets in queue.
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* Lowering MAXFRAGS may help with particularly lossy networks, but some
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* ntpq commands may rely on the longtime value of 24 implicitly,
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* assuming a single multipacket response will be large enough for any
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* needs. In contrast, the "mrulist" command is implemented as a series
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* of requests and multipacket responses to each.
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*/
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#define MAXFRAGS 32
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/*
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* Error codes for internal use
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*/
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#define ERR_UNSPEC 256
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#define ERR_INCOMPLETE 257
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#define ERR_TIMEOUT 258
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#define ERR_TOOMUCH 259
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/*
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* Flags for forming descriptors.
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*/
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#define OPT 0x80 /* this argument is optional, or'd with type */
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#define NO 0x0
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#define NTP_STR 0x1 /* string argument */
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#define NTP_UINT 0x2 /* unsigned integer */
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#define NTP_INT 0x3 /* signed integer */
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#define NTP_ADD 0x4 /* IP network address */
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#define IP_VERSION 0x5 /* IP version */
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#define NTP_ADP 0x6 /* IP address and port */
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#define NTP_LFP 0x7 /* NTP timestamp */
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#define NTP_MODE 0x8 /* peer mode */
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#define NTP_2BIT 0x9 /* leap bits */
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/*
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* Arguments are returned in a union
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*/
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typedef union {
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const char *string;
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long ival;
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u_long uval;
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sockaddr_u netnum;
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} arg_v;
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/*
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* Structure for passing parsed command line
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*/
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struct parse {
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const char *keyword;
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arg_v argval[MAXARGS];
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size_t nargs;
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};
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/*
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* ntpdc includes a command parser which could charitably be called
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* crude. The following structure is used to define the command
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* syntax.
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*/
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struct xcmd {
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const char *keyword; /* command key word */
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void (*handler) (struct parse *, FILE *); /* command handler */
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u_char arg[MAXARGS]; /* descriptors for arguments */
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const char *desc[MAXARGS]; /* descriptions for arguments */
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const char *comment;
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};
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/*
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* Structure to hold association data
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*/
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struct association {
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associd_t assid;
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u_short status;
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};
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/*
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* mrulist terminal status interval
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*/
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#define MRU_REPORT_SECS 5
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/*
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* var_format is used to override cooked formatting for selected vars.
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*/
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typedef struct var_format_tag {
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const char * varname;
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u_short fmt;
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} var_format;
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typedef struct chost_tag chost;
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struct chost_tag {
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const char *name;
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int fam;
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};
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extern chost chosts[];
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extern int interactive; /* are we prompting? */
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extern int old_rv; /* use old rv behavior? --old-rv */
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extern u_int assoc_cache_slots;/* count of allocated array entries */
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extern u_int numassoc; /* number of cached associations */
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extern u_int numhosts;
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extern void grow_assoc_cache(void);
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extern void asciize (int, char *, FILE *);
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extern int getnetnum (const char *, sockaddr_u *, char *, int);
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extern void sortassoc (void);
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extern void show_error_msg (int, associd_t);
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extern int dogetassoc (FILE *);
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extern int doquery (int, associd_t, int, size_t, const char *,
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u_short *, size_t *, const char **);
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extern int doqueryex (int, associd_t, int, size_t, const char *,
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u_short *, size_t *, const char **, int);
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extern const char * nntohost (sockaddr_u *);
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extern const char * nntohost_col (sockaddr_u *, size_t, int);
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extern const char * nntohostp (sockaddr_u *);
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extern int decodets (char *, l_fp *);
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extern int decodeuint (char *, u_long *);
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extern int nextvar (size_t *, const char **, char **, char **);
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extern int decodetime (char *, l_fp *);
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extern void printvars (size_t, const char *, int, int, int, FILE *);
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extern int decodeint (char *, long *);
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extern void makeascii (size_t, const char *, FILE *);
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extern const char * trunc_left (const char *, size_t);
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extern const char * trunc_right(const char *, size_t);
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typedef int/*BOOL*/ (*Ctrl_C_Handler)(void);
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extern int/*BOOL*/ push_ctrl_c_handler(Ctrl_C_Handler);
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extern int/*BOOL*/ pop_ctrl_c_handler(Ctrl_C_Handler);
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