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Changes print-like filter commands to use a log instead of a stderr.

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And extends the log subsystem to better handle that.
This commit is contained in:
Ondrej Zajicek 2010-09-20 13:01:01 +02:00
parent 2dec1e3471
commit 0d1b3c4c0e
6 changed files with 170 additions and 78 deletions
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82
filter/filter.c
View File

@ -350,49 +350,61 @@ val_in_range(struct f_val v1, struct f_val v2)
return CMP_ERROR;
}
static void val_print(struct f_val v);
static void
tree_node_print(struct f_tree *t, char **sep)
{
if (t == NULL)
return;
tree_node_print(t->left, sep);
logn(*sep);
val_print(t->from);
if (val_compare(t->from, t->to) != 0)
{
logn( ".." );
val_print(t->to);
}
*sep = ", ";
tree_node_print(t->right, sep);
}
static void
tree_print(struct f_tree *t)
{
if (!t) {
debug( "() " );
return;
}
debug( "[ " );
tree_print( t->left );
debug( ", " ); val_print( t->from ); debug( ".." ); val_print( t->to ); debug( ", " );
tree_print( t->right );
debug( "] " );
char *sep = "";
logn( "[" );
tree_node_print(t, &sep);
logn( "] " );
}
/*
* val_print - format filter value
*/
void
static void
val_print(struct f_val v)
{
char buf[2048];
char buf2[1024];
#define PRINTF(a...) bsnprintf( buf, 2040, a )
buf[0] = 0;
switch (v.type) {
case T_VOID: PRINTF( "(void)" ); break;
case T_BOOL: PRINTF( v.val.i ? "TRUE" : "FALSE" ); break;
case T_INT: PRINTF( "%d ", v.val.i ); break;
case T_STRING: PRINTF( "%s", v.val.s ); break;
case T_IP: PRINTF( "%I", v.val.px.ip ); break;
case T_PREFIX: PRINTF( "%I/%d", v.val.px.ip, v.val.px.len ); break;
case T_PAIR: PRINTF( "(%d,%d)", v.val.i >> 16, v.val.i & 0xffff ); break;
case T_QUAD: PRINTF( "%R", v.val.i ); break;
case T_PREFIX_SET: trie_print(v.val.ti, buf, 2040); break;
case T_SET: tree_print( v.val.t ); PRINTF( "\n" ); break;
case T_ENUM: PRINTF( "(enum %x)%d", v.type, v.val.i ); break;
case T_PATH: as_path_format(v.val.ad, buf2, 1020); PRINTF( "(path %s)", buf2 ); break;
case T_CLIST: int_set_format(v.val.ad, 1, buf2, 1020); PRINTF( "(clist %s)", buf2 ); break;
case T_PATH_MASK: pm_format(v.val.path_mask, buf2, 1020); PRINTF( "(pathmask%s)", buf2 ); break;
default: PRINTF( "[unknown type %x]", v.type );
#undef PRINTF
case T_VOID: logn("(void)"); return;
case T_BOOL: logn(v.val.i ? "TRUE" : "FALSE"); return;
case T_INT: logn("%d", v.val.i); return;
case T_STRING: logn("%s", v.val.s); return;
case T_IP: logn("%I", v.val.px.ip); return;
case T_PREFIX: logn("%I/%d", v.val.px.ip, v.val.px.len); return;
case T_PAIR: logn("(%d,%d)", v.val.i >> 16, v.val.i & 0xffff); return;
case T_QUAD: logn("%R", v.val.i); return;
case T_PREFIX_SET: trie_print(v.val.ti); return;
case T_SET: tree_print(v.val.t); return;
case T_ENUM: logn("(enum %x)%d", v.type, v.val.i); return;
case T_PATH: as_path_format(v.val.ad, buf2, 1000); logn("(path %s)", buf2); return;
case T_CLIST: int_set_format(v.val.ad, 1, buf2, 1000); logn("(clist %s)", buf2); return;
case T_PATH_MASK: pm_format(v.val.path_mask, buf2, 1000); logn("(pathmask%s)", buf2); return;
default: logn( "[unknown type %x]", v.type ); return;
}
debug( buf );
}
static struct rte **f_rte, *f_rte_old;
@ -628,7 +640,7 @@ interpret(struct f_inst *what)
case P('p',','):
ONEARG;
if (what->a2.i == F_NOP || (what->a2.i != F_NONL && what->a1.p))
debug( "\n" );
log_commit(*L_INFO);
switch (what->a2.i) {
case F_QUITBIRD:
@ -1101,7 +1113,10 @@ f_run(struct filter *filter, struct rte **rte, struct ea_list **tmp_attrs, struc
f_rte_old = *rte;
f_pool = tmp_pool;
inst = filter->root;
log_reset();
res = interpret(inst);
if (res.type != T_RETURN) {
log( L_ERR "Filter %s did not return accept nor reject. Make up your mind", filter->name);
return F_ERROR;
@ -1113,6 +1128,7 @@ f_run(struct filter *filter, struct rte **rte, struct ea_list **tmp_attrs, struc
int
f_eval_int(struct f_inst *expr)
{
/* Called independently in parse-time to eval expressions */
struct f_val res;
f_flags = 0;
@ -1120,7 +1136,10 @@ f_eval_int(struct f_inst *expr)
f_rte = NULL;
f_rte_old = NULL;
f_pool = cfg_mem;
log_reset();
res = interpret(expr);
if (res.type != T_INT)
cf_error("Integer expression expected");
return res.val.i;
@ -1129,6 +1148,7 @@ f_eval_int(struct f_inst *expr)
u32
f_eval_asn(struct f_inst *expr)
{
/* Called as a part of another interpret call, therefore no log_reset() */
struct f_val res = interpret(expr);
if (res.type != T_INT)
cf_error("Can't operate with value of non-integer type in AS path mask constructor");

3
filter/filter.h
View File

@ -74,7 +74,7 @@ struct f_trie *f_new_trie(linpool *lp);
void trie_add_prefix(struct f_trie *t, ip_addr px, int plen, int l, int h);
int trie_match_prefix(struct f_trie *t, ip_addr px, int plen);
int trie_same(struct f_trie *t1, struct f_trie *t2);
int trie_print(struct f_trie *t, char *buf, int blen);
void trie_print(struct f_trie *t);
void fprefix_get_bounds(struct f_prefix *px, int *l, int *h);
@ -107,7 +107,6 @@ int i_same(struct f_inst *f1, struct f_inst *f2);
int val_compare(struct f_val v1, struct f_val v2);
int tree_compare(const void *p1, const void *p2);
void val_print(struct f_val v);
#define F_NOP 0
#define F_NONL 1

2
filter/test.conf
View File

@ -130,6 +130,7 @@ function __test2()
function test_pxset(prefix set pxs)
{
print pxs;
print " must be true: ", 10.0.0.0/8 ~ pxs, ",", 10.0.0.0/10 ~ pxs, ",", 10.0.0.0/12 ~ pxs, ",",
20.0.0.0/24 ~ pxs, ",", 20.0.40.0/24 ~ pxs, ",", 20.0.0.0/26 ~ pxs, ",",
20.0.100.0/26 ~ pxs, ",", 20.0.0.0/28 ~ pxs, ",", 20.0.255.0/28 ~ pxs;
@ -212,6 +213,7 @@ string s;
", false: ", RTS_BGP ~ [RTS_STATIC, RTS_DEVICE];
ps = [(1,(one+one)), (3,4)..(4,8), (5,*), (6,3..6)];
print "Pair set: ", ps;
print "Testing pair set, true: ", pp ~ ps, " ", (3,5) ~ ps, " ", (4,1) ~ ps, " ", (5,4) ~ ps, " ", (5,65535) ~ ps, " ", (6,4) ~ ps;
print "Testing pair set, false: ", (3,3) ~ ps, " ", (4,9) ~ ps, " ", (4,65535) ~ ps, " ", (6,2) ~ ps, " ", (6,(6+one)) ~ ps, " ", ((one+6),2) ~ ps ;

55
filter/trie.c
View File

@ -264,53 +264,38 @@ trie_same(struct f_trie *t1, struct f_trie *t2)
return (t1->zero == t2->zero) && trie_node_same(&t1->root, &t2->root);
}
static int
trie_node_print(struct f_trie_node *t, char *buf, int blen)
static void
trie_node_print(struct f_trie_node *t, char **sep)
{
if (t == NULL)
return 0;
return;
int old_blen = blen;
int wb = 0; // bsnprintf(buf, blen, "%I/%d accept %I\n", t->addr, t->plen, t->accept);
debug("%I/%d accept %I\n", t->addr, t->plen, t->accept);
if ((wb < 0) || ((blen - wb) < 10))
if (ipa_nonzero(t->accept))
{
bsnprintf(buf, blen, "...\n");
return -1;
logn("%s%I/%d{%I}", *sep, t->addr, t->plen, t->accept);
*sep = ", ";
}
buf += wb;
blen -= wb;
wb = trie_node_print(t->c[0], buf, blen);
if (wb < 0)
return -1;
buf += wb;
blen -= wb;
wb = trie_node_print(t->c[1], buf, blen);
if (wb < 0)
return -1;
blen -= wb;
return (old_blen - blen);
trie_node_print(t->c[0], sep);
trie_node_print(t->c[1], sep);
}
/**
* trie_print
* @t: trie to be printed
* @buf: buffer
* @blen: buffer length
*
* Prints the trie to the buffer, using at most blen bytes.
* Returns the number of used bytes, or -1 if there is not
* enough space in the buffer.
* Prints the trie to the log buffer.
*/
int
trie_print(struct f_trie *t, char *buf, int blen)
void
trie_print(struct f_trie *t)
{
return trie_node_print(&t->root, buf, blen);
char *sep = "";
logn("[");
if (t->zero)
{
logn("0.0.0.0/0");
sep = ", ";
}
trie_node_print(&t->root, &sep);
logn("]");
}

3
lib/birdlib.h
View File

@ -41,8 +41,11 @@ struct rate_limit {
};
#define log log_msg
void log_reset(void);
void log_commit(int class);
void log_msg(char *msg, ...);
void log_rl(struct rate_limit *rl, char *msg, ...);
void logn(char *msg, ...);
void die(char *msg, ...) NORET;
void bug(char *msg, ...) NORET;

103
sysdep/unix/log.c
View File

@ -65,14 +65,43 @@ static char *class_names[] = {
"BUG"
};
static void
vlog(int class, char *msg, va_list args)
{
char buf[1024];
struct log_config *l;
#define LOG_BUFFER_SIZE 1024
static char log_buffer[LOG_BUFFER_SIZE];
static char *log_buffer_pos;
static int log_buffer_remains;
if (bvsnprintf(buf, sizeof(buf)-1, msg, args) < 0)
bsprintf(buf + sizeof(buf) - 100, " ... <too long>");
/**
* log_reset - reset the log buffer
*
* This function resets a log buffer and discards buffered
* messages. Should be used before a log message is prepared
* using logn().
*/
void
log_reset(void)
{
log_buffer_pos = log_buffer;
log_buffer_remains = LOG_BUFFER_SIZE;
log_buffer[0] = 0;
}
/**
* log_commit - commit a log message
* @class: message class information (%L_DEBUG to %L_BUG, see |lib/birdlib.h|)
*
* This function writes a message prepared in the log buffer to the
* log file (as specified in the configuration). The log buffer is
* reset after that. The log message is a full line, log_commit()
* terminates it.
*
* The message class is an integer, not a first char of a string like
* in log(), so it should be written like *L_INFO.
*/
void
log_commit(int class)
{
struct log_config *l;
WALK_LIST(l, *current_log_list)
{
@ -88,18 +117,51 @@ vlog(int class, char *msg, va_list args)
tm_format_datetime(tbuf, &config->tf_log, now);
fprintf(l->fh, "%s <%s> ", tbuf, class_names[class]);
}
fputs(buf, l->fh);
fputs(log_buffer, l->fh);
fputc('\n', l->fh);
fflush(l->fh);
}
#ifdef HAVE_SYSLOG
else
syslog(syslog_priorities[class], "%s", buf);
syslog(syslog_priorities[class], "%s", log_buffer);
#endif
}
cli_echo(class, buf);
cli_echo(class, log_buffer);
log_reset();
}
static void
log_print(const char *msg, va_list args)
{
int i;
if (log_buffer_remains == 0)
return;
i=bvsnprintf(log_buffer_pos, log_buffer_remains, msg, args);
if (i < 0)
{
bsprintf(log_buffer + LOG_BUFFER_SIZE - 100, " ... <too long>");
log_buffer_remains = 0;
return;
}
log_buffer_pos += i;
log_buffer_remains -= i;
}
static void
vlog(int class, const char *msg, va_list args)
{
log_reset();
log_print(msg, args);
log_commit(class);
}
/**
* log - log a message
* @msg: printf-like formatting string with message class information
@ -109,6 +171,7 @@ vlog(int class, char *msg, va_list args)
* and writes it to the corresponding log file (as specified in the
* configuration). Please note that the message is automatically
* formatted as a full line, no need to include |\n| inside.
* It is essentially a sequence of log_reset(), logn() and log_commit().
*/
void
log_msg(char *msg, ...)
@ -123,6 +186,26 @@ log_msg(char *msg, ...)
va_end(args);
}
/**
* logn - prepare a partial message in the log buffer
* @msg: printf-like formatting string (without message class information)
*
* This function formats a message according to the format string @msg
* and adds it to the log buffer. Messages in the log buffer are
* logged when the buffer is flushed using log_commit() function. The
* message should not contain |\n|, log_commit() also terminates a
* line.
*/
void
logn(char *msg, ...)
{
va_list args;
va_start(args, msg);
log_print(msg, args);
va_end(args);
}
void
log_rl(struct rate_limit *rl, char *msg, ...)
{