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noit_console_state.c
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noit_console_state.c
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/*
* Copyright (c) 2007, OmniTI Computer Consulting, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name OmniTI Computer Consulting, Inc. nor the names
* of its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "noit_defines.h"
#include "noit_version.h"
#include "eventer/eventer.h"
#include "eventer/eventer_jobq.h"
#include "utils/noit_log.h"
#include "utils/noit_hash.h"
#include "noit_listener.h"
#include "noit_console.h"
#include "noit_tokenizer.h"
#include "noit_module.h"
#include <netinet/in.h>
#include <arpa/inet.h>
#include <pcre.h>
int cmd_info_comparek(const void *akv, const void *bv) {
char *ak = (char *)akv;
cmd_info_t *b = (cmd_info_t *)bv;
return strcasecmp(ak, b->name);
}
int cmd_info_compare(const void *av, const void *bv) {
cmd_info_t *a = (cmd_info_t *)av;
cmd_info_t *b = (cmd_info_t *)bv;
return strcasecmp(a->name, b->name);
}
static void
noit_console_spit_event(eventer_t e, void *c) {
struct timeval now, diff;
noit_console_closure_t ncct = c;
char fdstr[12];
char wfn[42];
char funcptr[20];
const char *cname;
cname = eventer_name_for_callback(e->callback);
snprintf(fdstr, sizeof(fdstr), " fd: %d", e->fd);
gettimeofday(&now, NULL);
sub_timeval(e->whence, now, &diff);
snprintf(wfn, sizeof(wfn), " fires: %lld.%06ds", (long long)diff.tv_sec, (int)diff.tv_usec);
snprintf(funcptr, sizeof(funcptr), "%p", e->callback);
nc_printf(ncct, " [%p]%s%s [%c%c%c%c] -> %s(%p)\n",
e,
e->mask & (EVENTER_READ | EVENTER_WRITE | EVENTER_EXCEPTION) ? fdstr : "",
e->mask & (EVENTER_TIMER) ? wfn : "",
e->mask & EVENTER_READ ? 'r' : '-',
e->mask & EVENTER_WRITE ? 'w' : '-',
e->mask & EVENTER_EXCEPTION ? 'e' : '-',
e->mask & EVENTER_TIMER ? 't' : '-',
cname ? cname : funcptr, e->closure);
}
static void
noit_console_spit_jobq(eventer_jobq_t *jobq, void *c) {
noit_console_closure_t ncct = c;
int qlen = 0;
const char *bqn = "(undefined)";
if(jobq->backq && jobq->backq->queue_name) bqn = jobq->backq->queue_name;
nc_printf(ncct, "=== %s ===\n", jobq->queue_name);
nc_printf(ncct, " concurrency: %d\n", jobq->concurrency);
nc_printf(ncct, " backq: %s\n", bqn);
sem_getvalue(&jobq->semaphore, &qlen);
nc_printf(ncct, " queue size: %d\n", qlen);
}
static int
noit_console_eventer_timers(noit_console_closure_t ncct, int argc, char **argv,
noit_console_state_t *dstate, void *unused) {
if(argc != 0) return -1;
eventer_foreach_timedevent(noit_console_spit_event, ncct);
return 0;
}
static int
noit_console_eventer_sockets(noit_console_closure_t ncct, int argc, char **argv,
noit_console_state_t *dstate, void *unused) {
if(argc != 0) return -1;
eventer_foreach_fdevent(noit_console_spit_event, ncct);
return 0;
}
static int
noit_console_eventer_jobq(noit_console_closure_t ncct, int argc, char **argv,
noit_console_state_t *dstate, void *unused) {
eventer_jobq_t *jobq;
if(argc != 1) {
eventer_jobq_process_each(noit_console_spit_jobq, (void *)ncct);
return 0;
}
jobq = eventer_jobq_retrieve(argv[0]);
if(!jobq) {
nc_printf(ncct, "no jobq found for '%s'\n", argv[0] ? argv[0] : "");
return 0;
}
noit_console_spit_jobq(jobq, ncct);
return 0;
}
cmd_info_t console_command_help = {
"help", noit_console_help, noit_console_opt_delegate, NULL, NULL
};
cmd_info_t console_command_exit = {
"exit", noit_console_state_pop, NULL, NULL, NULL
};
cmd_info_t console_command_shutdown = {
"shutdown", noit_console_shutdown, NULL, NULL, NULL
};
cmd_info_t console_command_restart = {
"restart", noit_console_restart, NULL, NULL, NULL
};
cmd_info_t console_command_eventer_timers = {
"timers", noit_console_eventer_timers, NULL, NULL, NULL
};
cmd_info_t console_command_eventer_sockets = {
"sockets", noit_console_eventer_sockets, NULL, NULL, NULL
};
cmd_info_t console_command_eventer_jobq = {
"jobq", noit_console_eventer_jobq, NULL, NULL, NULL
};
static int
noit_console_version(noit_console_closure_t ncct, int argc, char **argv,
noit_console_state_t *dstate, void *unused) {
char buff[256];
noit_build_version(buff, sizeof(buff));
nc_printf(ncct, "version: %s\n", buff);
return 0;
}
cmd_info_t console_command_version = {
"version", noit_console_version, NULL, NULL, NULL
};
void
noit_console_add_help(const char *topic, console_cmd_func_t topic_func,
console_opt_func_t ac) {
noit_console_state_t *s = console_command_help.dstate;
if(!s) {
console_command_help.dstate = s = calloc(1, sizeof(*s));
noit_skiplist_init(&s->cmds);
noit_skiplist_set_compare(&s->cmds, cmd_info_compare, cmd_info_comparek);
}
noit_console_state_add_cmd(s, NCSCMD(topic, topic_func, ac, NULL, NULL));
}
static char *default_prompt = NULL;
void
noit_console_set_default_prompt(const char *prompt) {
char *tofree = default_prompt;
default_prompt = strdup(prompt);
if(tofree) free(tofree);
}
static char *
noit_console_state_prompt(EditLine *el) {
static char *tl = "noit# ";
if(default_prompt) return default_prompt;
return tl;
}
static char *
apply_replace(const char *src, const char *name, const char *value) {
char *result, *cp;
const char *nextpat, *searchstart;
char pat[256];
int maxlen, patlen, vlen, slen;
snprintf(pat, sizeof(pat), "{%s}", name);
patlen = strlen(pat);
vlen = strlen(value);
slen = strlen(src);
/* Worst case is just a stream of replacements. */
maxlen = (slen / patlen) * MAX(vlen,patlen) + (slen % patlen) + 1;
cp = result = malloc(maxlen);
searchstart = src;
while((nextpat = strstr(searchstart, pat)) != NULL) {
memcpy(cp, searchstart, nextpat - searchstart); /* pull the prefix */
cp += nextpat - searchstart; /* advance destination */
memcpy(cp, value, vlen); /* copy replacement */
cp += vlen; /* advance destination */
searchstart = nextpat + patlen; /* set new searchstart */
}
/* Pick up the trailer (plus '\0') */
memcpy(cp, searchstart, strlen(searchstart)+1);
return result;
}
static pcre *IP_match = NULL;
static pcre *numeric_match = NULL;
static int
expand_range(const char *range, char ***set, int max_count, const char **err) {
int count, erroff, ovector[30], rv;
char buff[32]; /* submatches */
const char *pcre_err;
*err = NULL;
if(!IP_match) {
IP_match = pcre_compile("^(full:)?(\\d+\\.\\d+\\.\\d+\\.\\d+)/(\\d+)$",
0, &pcre_err, &erroff, NULL);
if(!IP_match) {
*err = "IP match pattern failed to compile!";
noitL(noit_error, "pcre_compiled failed offset %d: %s\n", erroff, pcre_err);
return -1;
}
}
if(!numeric_match) {
numeric_match = pcre_compile("^(\\d+)(?:,(\\d+))?\\.\\.(\\d+)$",
0, &pcre_err, &erroff, NULL);
if(!numeric_match) {
*err = "numeric match pattern failed to compile!";
noitL(noit_error, "pcre_compiled failed offset %d: %s\n", erroff, pcre_err);
return -1;
}
}
rv = pcre_exec(IP_match, NULL, range, strlen(range), 0, 0, ovector, 30);
if(rv >= 0) {
int mask, full = 0, i;
u_int32_t host_addr;
struct in_addr addr;
/* 0 is the full monty, 1 is "" or "full:", 2 is the IP, 3 is the mask */
pcre_copy_substring(range, ovector, rv, 1, buff, sizeof(buff));
full = buff[0] ? 1 : 0;
pcre_copy_substring(range, ovector, rv, 3, buff, sizeof(buff));
mask = atoi(buff);
if(mask == 32) full = 1; /* host implies.. the host */
if(mask < 0 || mask > 32) {
*err = "invalid netmask";
return 0;
}
count = 1 << (32-mask);
pcre_copy_substring(range, ovector, rv, 2, buff, sizeof(buff));
if(inet_pton(AF_INET, buff, &addr) != 1) {
*err = "could not parse IP address";
return 0;
}
host_addr = ntohl(addr.s_addr);
host_addr &= ~((u_int32_t)count - 1);
if(!full) count -= 2; /* No network or broadcast */
if(count > max_count || !count) return -count;
if(!full) host_addr++; /* Skip the network address */
*set = malloc(count * sizeof(**set));
for(i=0; i<count; i++) {
addr.s_addr = htonl(host_addr + i);
inet_ntop(AF_INET, &addr, buff, sizeof(buff));
(*set)[i] = strdup(buff);
}
return count;
}
rv = pcre_exec(numeric_match, NULL, range, strlen(range), 0, 0, ovector, 30);
if(rv >= 0) {
int s, n, e, i;
pcre_copy_substring(range, ovector, rv, 1, buff, sizeof(buff));
s = atoi(buff);
pcre_copy_substring(range, ovector, rv, 3, buff, sizeof(buff));
e = atoi(buff);
pcre_copy_substring(range, ovector, rv, 2, buff, sizeof(buff));
if(buff[0]) n = atoi(buff);
else n = (s<e) ? s+1 : s-1;
/* Ensure that s < n < e */
if((s<e && s>n) || (s>e && s<n)) {
*err = "mixed up sequence";
return 0;
}
i = n - s; /* Our increment */
count = (e - s) / i + 1;
*set = malloc(count * sizeof(**set));
count = 0;
for(; (i>0 && s<=e) || (i<0 && s>=e); s += i) {
snprintf(buff, sizeof(buff), "%d", s);
(*set)[count] = strdup(buff);
count++;
}
return count;
}
*err = "cannot understand range";
return 0;
}
int
noit_console_generic_apply(noit_console_closure_t ncct,
int argc, char **argv,
noit_console_state_t *dstate,
void *closure) {
int i, j, count;
char *name, *range;
char **nargv, **expanded = NULL;
const char *err;
int problems = 0;
if(argc < 3) {
nc_printf(ncct, "apply <name> <range> cmd ...\n");
return -1;
}
name = argv[0];
range = argv[1];
argc -= 2;
argv += 2;
count = expand_range(range, &expanded, 256, &err);
if(!count) {
nc_printf(ncct, "apply error: '%s' range produced nothing [%s]\n",
range, err ? err : "unknown error");
return -1;
}
if(count < 0) {
nc_printf(ncct, "apply error: '%s' range would produce %d items.\n",
range, count);
return -1;
}
nargv = malloc(argc * sizeof(*nargv));
for(i=0; i<count; i++) {
for(j=0; j<argc; j++) nargv[j] = apply_replace(argv[j], name, expanded[i]);
if(noit_console_state_do(ncct, argc, nargv)) problems = -1;
for(j=0; j<argc; j++) free(nargv[j]);
free(expanded[i]);
}
free(nargv);
free(expanded);
return problems;
}
int
noit_console_render_help(noit_console_closure_t ncct,
noit_console_state_t *dstate) {
noit_skiplist_node *iter = NULL;
if(!dstate) {
nc_printf(ncct, "No help available.\n");
return -1;
}
for(iter = noit_skiplist_getlist(&dstate->cmds); iter;
noit_skiplist_next(&dstate->cmds,&iter)) {
cmd_info_t *cmd = iter->data;
if(strcmp(cmd->name, "help")) nc_printf(ncct, " ==> '%s'\n", cmd->name);
}
return 0;
}
int
noit_console_state_delegate(noit_console_closure_t ncct,
int argc, char **argv,
noit_console_state_t *dstate,
void *closure) {
noit_console_state_stack_t tmps = { 0 };
if(argc == 0) {
noit_console_render_help(ncct, dstate);
nc_printf(ncct, "incomplete command.\n");
return -1;
}
if(!dstate) {
nc_printf(ncct, "internal error: no delegate state\n");
return -1;
}
tmps.state = dstate;
return _noit_console_state_do(ncct, &tmps, argc, argv);
}
int
_noit_console_state_do(noit_console_closure_t ncct,
noit_console_state_stack_t *stack,
int argc, char **argv) {
noit_skiplist_node *next, *amb = NULL;
cmd_info_t *cmd;
if(!argc) {
noit_console_render_help(ncct, stack->state);
nc_printf(ncct, "arguments expected\n");
return -1;
}
cmd = noit_skiplist_find_neighbors(&stack->state->cmds, argv[0],
NULL, NULL, &next);
if(!cmd) {
int ambiguous = 0;
if(next) {
cmd_info_t *pcmd = NULL;
cmd = next->data;
amb = next;
noit_skiplist_next(&stack->state->cmds, &amb);
if(amb) pcmd = amb->data;
/* So cmd is the next in line... pcmd is the one after that.
* If they both strncasecmp to 0, we're ambiguous,
* neither, then we're not found.
* only cmd, then we've found a partial, unambiguous.
*/
if(strncasecmp(cmd->name, argv[0], strlen(argv[0])) == 0) {
if(pcmd && strncasecmp(pcmd->name, argv[0], strlen(argv[0])) == 0) {
cmd = NULL;
ambiguous = 1;
}
}
else
cmd = NULL;
}
if(!cmd) {
if(ambiguous || !strcmp(argv[0], "?")) {
char *partial = ambiguous ? argv[0] : "";
if(ambiguous) nc_printf(ncct, "Ambiguous command: '%s'\n", argv[0]);
amb = ambiguous ? next : noit_skiplist_getlist(&stack->state->cmds);
for(; amb; noit_skiplist_next(&stack->state->cmds, &amb)) {
cmd = amb->data;
if(!strlen(partial) || strncasecmp(cmd->name, partial, strlen(partial)) == 0)
nc_printf(ncct, "\t%s\n", cmd->name);
else
break;
}
}
else
nc_printf(ncct, "No such command: '%s'\n", argv[0]);
return -1;
}
}
if(ncct->state_stack->name) free(ncct->state_stack->name);
ncct->state_stack->name = strdup(cmd->name);
return cmd->func(ncct, argc-1, argv+1, cmd->dstate, cmd->closure);
}
int
noit_console_state_do(noit_console_closure_t ncct, int argc, char **argv) {
return _noit_console_state_do(ncct, ncct->state_stack, argc, argv);
}
noit_console_state_t *
noit_console_state_alloc(void) {
noit_console_state_t *s;
s = calloc(1, sizeof(*s));
noit_skiplist_init(&s->cmds);
noit_skiplist_set_compare(&s->cmds, cmd_info_compare, cmd_info_comparek);
noit_console_state_add_cmd(s,
NCSCMD("apply", noit_console_generic_apply, NULL, NULL, NULL));
noit_console_state_add_cmd(s, &console_command_help);
return s;
}
int
noit_console_state_add_cmd(noit_console_state_t *state,
cmd_info_t *cmd) {
return (noit_skiplist_insert(&state->cmds, cmd) != NULL);
}
cmd_info_t *
noit_console_state_get_cmd(noit_console_state_t *state,
const char *name) {
cmd_info_t *cmd;
cmd = noit_skiplist_find(&state->cmds, name, NULL);
return cmd;
}
noit_console_state_t *
noit_console_state_build(console_prompt_func_t promptf, cmd_info_t **clist,
state_free_func_t sfreef) {
noit_console_state_t *state;
state = noit_console_state_alloc();
state->console_prompt_function = promptf;
while(*clist) {
noit_skiplist_insert(&state->cmds, *clist);
clist++;
}
state->statefree = sfreef;
return state;
}
cmd_info_t *NCSCMD(const char *name, console_cmd_func_t func,
console_opt_func_t ac,
noit_console_state_t *dstate, void *closure) {
cmd_info_t *cmd;
cmd = calloc(1, sizeof(*cmd));
cmd->name = strdup(name);
cmd->func = func;
cmd->autocomplete = ac;
cmd->dstate = dstate;
cmd->closure = closure;
return cmd;
}
noit_console_state_t *
noit_console_mksubdelegate(noit_console_state_t *parent, const char *cmd) {
noit_console_state_t *child;
cmd_info_t *existing;
existing = noit_console_state_get_cmd(parent, cmd);
if(existing) return existing->dstate;
child = noit_console_state_alloc();
noit_console_state_add_cmd(parent,
NCSCMD(cmd, noit_console_state_delegate,
noit_console_opt_delegate, child, NULL));
return child;
}
noit_console_state_t *
noit_console_state_initial() {
static noit_console_state_t *_top_level_state = NULL;
if(!_top_level_state) {
static noit_console_state_t *no_state, *show_state, *evdeb;
_top_level_state = noit_console_state_alloc();
noit_console_state_add_cmd(_top_level_state, &console_command_exit);
show_state = noit_console_mksubdelegate(_top_level_state, "show");
no_state = noit_console_mksubdelegate(_top_level_state, "no");
noit_console_state_add_cmd(_top_level_state, &console_command_shutdown);
noit_console_state_add_cmd(_top_level_state, &console_command_restart);
noit_console_state_add_cmd(show_state, &console_command_version);
(void)no_state;
evdeb = noit_console_mksubdelegate(
noit_console_mksubdelegate(show_state,
"eventer"),
"debug");
noit_console_state_add_cmd(evdeb, &console_command_eventer_timers);
noit_console_state_add_cmd(evdeb, &console_command_eventer_sockets);
noit_console_state_add_cmd(evdeb, &console_command_eventer_jobq);
}
return _top_level_state;
}
void
noit_console_state_push_state(noit_console_closure_t ncct,
noit_console_state_t *state) {
noit_console_state_stack_t *stack;
stack = calloc(1, sizeof(*stack));
stack->last = ncct->state_stack;
stack->state = state;
ncct->state_stack = stack;
}
int
noit_console_shutdown(noit_console_closure_t ncct, int argc, char **argv,
noit_console_state_t *dstate, void *unused) {
exit(2);
}
int
noit_console_restart(noit_console_closure_t ncct, int argc, char **argv,
noit_console_state_t *dstate, void *unused) {
exit(1);
}
int
noit_console_help(noit_console_closure_t ncct, int argc, char **argv,
noit_console_state_t *dstate, void *unused) {
noit_console_state_stack_t *current;
current = ncct->state_stack;
if(!argc) {
noit_console_state_stack_t *i;
if(!current) {
nc_printf(ncct, "no state!\n");
return -1;
}
for(i=current;i;i=i->last) {
if(i != current)
nc_printf(ncct, " -> '%s'\n", i->name ? i->name : "(null)");
}
if(dstate) {
nc_printf(ncct, "= Topics =\n");
noit_console_render_help(ncct, dstate);
}
if(current->state) {
nc_printf(ncct, "\n= Commands =\n");
noit_console_render_help(ncct, current->state);
}
return 0;
}
else if(argc > 0) {
nc_printf(ncct, "Help for '%s':\n", argv[0]);
if(noit_console_state_delegate(ncct, argc, argv, dstate, NULL) == 0)
return 0;
}
nc_printf(ncct, "command not understood.\n");
return -1;
}
int
noit_console_state_pop(noit_console_closure_t ncct, int argc, char **argv,
noit_console_state_t *dstate, void *unused) {
noit_console_state_stack_t *current;
if(argc) {
nc_printf(ncct, "no arguments allowed to this command.\n");
return -1;
}
if(!ncct->state_stack || !ncct->state_stack->last) {
ncct->wants_shutdown = 1;
return 0;
}
current = ncct->state_stack;
ncct->state_stack = current->last;
current->last = NULL;
if(current->state->statefree) current->state->statefree(current->state);
if(current->name) free(current->name);
free(current);
noit_console_state_init(ncct);
return 0;
}
int
noit_console_state_init(noit_console_closure_t ncct) {
if(ncct->el) {
console_prompt_func_t f;
f = ncct->state_stack->state->console_prompt_function;
el_set(ncct->el, EL_PROMPT, f ? f : noit_console_state_prompt);
}
return 0;
}