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-rw-r--r--conntrack.85
-rw-r--r--include/conntrack.h2
-rw-r--r--src/conntrack.c156
3 files changed, 137 insertions, 26 deletions
diff --git a/conntrack.8 b/conntrack.8
index d80a778..f273434 100644
--- a/conntrack.8
+++ b/conntrack.8
@@ -144,6 +144,11 @@ the MARK value into the ctmark.
Otherwise, the mask is logically ANDed with the existing mark before the comparision.
In "--create" mode, the mask is ignored.
.TP
+.BI "-l, --label " "LABEL,..."
+Specify the conntrack labels.
+This option is only available in conjunction with "-L, --dump" or "-E, --event".
+Match entries whose labels matches at least those specified as arguments.
+.TP
.BI "-c, --secmark " "SECMARK"
Specify the conntrack selinux security mark.
.TP
diff --git a/include/conntrack.h b/include/conntrack.h
index fd6126b..6cd9962 100644
--- a/include/conntrack.h
+++ b/include/conntrack.h
@@ -10,7 +10,7 @@
#include <netinet/in.h>
#define NUMBER_OF_CMD 19
-#define NUMBER_OF_OPT 24
+#define NUMBER_OF_OPT 25
struct ctproto_handler {
struct list_head head;
diff --git a/src/conntrack.c b/src/conntrack.c
index 61e2fce..353ff61 100644
--- a/src/conntrack.c
+++ b/src/conntrack.c
@@ -79,6 +79,9 @@ static struct {
/* Allow to filter by mark from kernel-space. */
struct nfct_filter_dump_mark filter_mark_kernel;
+
+ /* Allows filtering by ctlabels */
+ struct nfct_bitmask *label;
} tmpl;
static int alloc_tmpl_objects(void)
@@ -104,6 +107,8 @@ static void free_tmpl_objects(void)
nfct_destroy(tmpl.mask);
if (tmpl.exp)
nfexp_destroy(tmpl.exp);
+ if (tmpl.label)
+ nfct_bitmask_destroy(tmpl.label);
}
enum ct_command {
@@ -247,13 +252,16 @@ enum ct_options {
CT_OPT_ZONE_BIT = 23,
CT_OPT_ZONE = (1 << CT_OPT_ZONE_BIT),
+
+ CT_OPT_LABEL_BIT = 24,
+ CT_OPT_LABEL = (1 << CT_OPT_LABEL_BIT),
};
/* If you add a new option, you have to update NUMBER_OF_OPT in conntrack.h */
/* Update this mask to allow to filter based on new options. */
#define CT_COMPARISON (CT_OPT_PROTO | CT_OPT_ORIG | CT_OPT_REPL | \
CT_OPT_MARK | CT_OPT_SECMARK | CT_OPT_STATUS | \
- CT_OPT_ID | CT_OPT_ZONE)
+ CT_OPT_ID | CT_OPT_ZONE | CT_OPT_LABEL)
static const char *optflags[NUMBER_OF_OPT] = {
[CT_OPT_ORIG_SRC_BIT] = "src",
@@ -280,6 +288,7 @@ static const char *optflags[NUMBER_OF_OPT] = {
[CT_OPT_BUFFERSIZE_BIT] = "buffer-size",
[CT_OPT_ANY_NAT_BIT] = "any-nat",
[CT_OPT_ZONE_BIT] = "zone",
+ [CT_OPT_LABEL_BIT] = "label",
};
static struct option original_opts[] = {
@@ -320,12 +329,13 @@ static struct option original_opts[] = {
{"buffer-size", 1, 0, 'b'},
{"any-nat", 2, 0, 'j'},
{"zone", 1, 0, 'w'},
+ {"label", 1, 0, 'l'},
{0, 0, 0, 0}
};
static const char *getopt_str = "L::I::U::D::G::E::F::hVs:d:r:q:"
"p:t:u:e:a:z[:]:{:}:m:i:f:o:n::"
- "g::c:b:C::Sj::w:";
+ "g::c:b:C::Sj::w:l:";
/* Table of legal combinations of commands and options. If any of the
* given commands make an option legal, that option is legal (applies to
@@ -340,26 +350,26 @@ static const char *getopt_str = "L::I::U::D::G::E::F::hVs:d:r:q:"
static char commands_v_options[NUMBER_OF_CMD][NUMBER_OF_OPT] =
/* Well, it's better than "Re: Linux vs FreeBSD" */
{
- /* s d r q p t u z e [ ] { } a m i f n g o c b j w*/
-/*CT_LIST*/ {2,2,2,2,2,0,2,2,0,0,0,0,0,0,2,0,2,2,2,2,2,0,2,2},
-/*CT_CREATE*/ {3,3,3,3,1,1,2,0,0,0,0,0,0,2,2,0,0,2,2,0,0,0,0,2},
-/*CT_UPDATE*/ {2,2,2,2,2,2,2,0,0,0,0,0,0,0,2,2,2,2,2,2,0,0,0,0},
-/*CT_DELETE*/ {2,2,2,2,2,2,2,0,0,0,0,0,0,0,2,2,2,2,2,2,0,0,0,2},
-/*CT_GET*/ {3,3,3,3,1,0,0,0,0,0,0,0,0,0,0,2,0,0,0,2,0,0,0,0},
-/*CT_FLUSH*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
-/*CT_EVENT*/ {2,2,2,2,2,0,0,0,2,0,0,0,0,0,2,0,0,2,2,2,2,2,2,2},
-/*VERSION*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
-/*HELP*/ {0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
-/*EXP_LIST*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,2,0,0,0,0},
-/*EXP_CREATE*/{1,1,2,2,1,1,2,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0},
-/*EXP_DELETE*/{1,1,2,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
-/*EXP_GET*/ {1,1,2,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
-/*EXP_FLUSH*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
-/*EXP_EVENT*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0},
-/*CT_COUNT*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
-/*EXP_COUNT*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
-/*CT_STATS*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
-/*EXP_STATS*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
+ /* s d r q p t u z e [ ] { } a m i f n g o c b j w l*/
+/*CT_LIST*/ {2,2,2,2,2,0,2,2,0,0,0,0,0,0,2,0,2,2,2,2,2,0,2,2,2},
+/*CT_CREATE*/ {3,3,3,3,1,1,2,0,0,0,0,0,0,2,2,0,0,2,2,0,0,0,0,2,0},
+/*CT_UPDATE*/ {2,2,2,2,2,2,2,0,0,0,0,0,0,0,2,2,2,2,2,2,0,0,0,0,0},
+/*CT_DELETE*/ {2,2,2,2,2,2,2,0,0,0,0,0,0,0,2,2,2,2,2,2,0,0,0,2,0},
+/*CT_GET*/ {3,3,3,3,1,0,0,0,0,0,0,0,0,0,0,2,0,0,0,2,0,0,0,0,0},
+/*CT_FLUSH*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
+/*CT_EVENT*/ {2,2,2,2,2,0,0,0,2,0,0,0,0,0,2,0,0,2,2,2,2,2,2,2,2},
+/*VERSION*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
+/*HELP*/ {0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
+/*EXP_LIST*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,2,0,0,0,0,0},
+/*EXP_CREATE*/{1,1,2,2,1,1,2,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0},
+/*EXP_DELETE*/{1,1,2,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
+/*EXP_GET*/ {1,1,2,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
+/*EXP_FLUSH*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
+/*EXP_EVENT*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0},
+/*CT_COUNT*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
+/*EXP_COUNT*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
+/*CT_STATS*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
+/*EXP_STATS*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
};
static const int cmd2type[][2] = {
@@ -391,6 +401,7 @@ static const int opt2type[] = {
['i'] = CT_OPT_ID,
['j'] = CT_OPT_ANY_NAT,
['w'] = CT_OPT_ZONE,
+ ['l'] = CT_OPT_LABEL,
};
static const int opt2family_attr[][2] = {
@@ -413,6 +424,7 @@ static const int opt2attr[] = {
['c'] = ATTR_SECMARK,
['i'] = ATTR_ID,
['w'] = ATTR_ZONE,
+ ['l'] = ATTR_CONNLABELS,
};
static char exit_msg[NUMBER_OF_CMD][64] = {
@@ -450,7 +462,8 @@ static const char usage_conntrack_parameters[] =
" -c, --secmark secmark\t\t\tSet selinux secmark\n"
" -e, --event-mask eventmask\t\tEvent mask, eg. NEW,DESTROY\n"
" -z, --zero \t\t\t\tZero counters while listing\n"
- " -o, --output type[,...]\t\tOutput format, eg. xml\n";
+ " -o, --output type[,...]\t\tOutput format, eg. xml\n"
+ " -l, --label label[,...]\t\tconntrack labels\n";
static const char usage_expectation_parameters[] =
"Expectation parameters and options:\n"
@@ -816,6 +829,59 @@ parse_u32_mask(const char *arg, struct u32_mask *m)
m->mask = ~0;
}
+static int
+get_label(char *name)
+{
+ int bit = nfct_labelmap_get_bit(labelmap, name);
+ if (bit < 0)
+ exit_error(PARAMETER_PROBLEM, "unknown label '%s'", name);
+ return bit;
+}
+
+static void
+set_label(struct nfct_bitmask *b, char *name)
+{
+ int bit = get_label(name);
+ nfct_bitmask_set_bit(b, bit);
+}
+
+static unsigned int
+set_max_label(char *name, unsigned int current_max)
+{
+ int bit = get_label(name);
+ if ((unsigned int) bit > current_max)
+ return (unsigned int) bit;
+ return current_max;
+}
+
+static unsigned int
+parse_label_get_max(char *arg)
+{
+ unsigned int max = 0;
+ char *parse;
+
+ while ((parse = strchr(arg, ',')) != NULL) {
+ parse[0] = '\0';
+ max = set_max_label(arg, max);
+ arg = &parse[1];
+ }
+
+ max = set_max_label(arg, max);
+ return max;
+}
+
+static void
+parse_label(struct nfct_bitmask *b, char *arg)
+{
+ char * parse;
+ while ((parse = strchr(arg, ',')) != NULL) {
+ parse[0] = '\0';
+ set_label(b, arg);
+ arg = &parse[1];
+ }
+ set_label(b, arg);
+}
+
static void
add_command(unsigned int *cmd, const int newcmd)
{
@@ -984,6 +1050,24 @@ usage(char *prog)
static unsigned int output_mask;
+static int
+filter_label(const struct nf_conntrack *ct)
+{
+ if (tmpl.label == NULL)
+ return 0;
+
+ const struct nfct_bitmask *ctb = nfct_get_attr(ct, ATTR_CONNLABELS);
+ if (ctb == NULL)
+ return 1;
+
+ for (unsigned int i = 0; i <= nfct_bitmask_maxbit(tmpl.label); i++) {
+ if (nfct_bitmask_test_bit(tmpl.label, i) &&
+ !nfct_bitmask_test_bit(ctb, i))
+ return 1;
+ }
+
+ return 0;
+}
static int
filter_mark(const struct nf_conntrack *ct)
@@ -994,7 +1078,6 @@ filter_mark(const struct nf_conntrack *ct)
return 0;
}
-
static int
filter_nat(const struct nf_conntrack *obj, const struct nf_conntrack *ct)
{
@@ -1125,6 +1208,9 @@ static int event_cb(enum nf_conntrack_msg_type type,
if (filter_mark(ct))
return NFCT_CB_CONTINUE;
+ if (filter_label(ct))
+ return NFCT_CB_CONTINUE;
+
if (options & CT_COMPARISON &&
!nfct_cmp(obj, ct, NFCT_CMP_ALL | NFCT_CMP_MASK))
return NFCT_CB_CONTINUE;
@@ -1177,6 +1263,9 @@ static int dump_cb(enum nf_conntrack_msg_type type,
if (filter_mark(ct))
return NFCT_CB_CONTINUE;
+ if (filter_label(ct))
+ return NFCT_CB_CONTINUE;
+
if (options & CT_COMPARISON &&
!nfct_cmp(obj, ct, NFCT_CMP_ALL | NFCT_CMP_MASK))
return NFCT_CB_CONTINUE;
@@ -1882,7 +1971,8 @@ int main(int argc, char *argv[])
options |= CT_OPT_OUTPUT;
parse_parameter(optarg, &output_mask, PARSE_OUTPUT);
if (output_mask & _O_CL) {
- labelmap = nfct_labelmap_new(NULL);
+ if (!labelmap)
+ labelmap = nfct_labelmap_new(NULL);
if (!labelmap)
perror("nfct_labelmap_new");
}
@@ -1929,6 +2019,22 @@ int main(int argc, char *argv[])
tmpl.filter_mark_kernel.val = tmpl.mark.value;
tmpl.filter_mark_kernel.mask = tmpl.mark.mask;
break;
+ case 'l':
+ options |= opt2type[c];
+ char *optarg2 = strdup(optarg);
+
+ if (!labelmap)
+ labelmap = nfct_labelmap_new(NULL);
+ if (!labelmap)
+ exit_error(OTHER_PROBLEM, "unable to open labelmap file");
+
+ unsigned int max = parse_label_get_max(optarg);
+ struct nfct_bitmask * b = nfct_bitmask_new(max);
+
+ parse_label(b, optarg2);
+ tmpl.label = b;
+ free(optarg2);
+ break;
case 'a':
fprintf(stderr, "WARNING: ignoring -%c, "
"deprecated option.\n", c);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-29 19:03:46 +0000