git: 9c125336727b - main - pf: convert DIOCGETSRCNODES to netlink
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Date: Tue, 15 Oct 2024 14:29:32 UTC
The branch main has been updated by kp:
URL: https://cgit.FreeBSD.org/src/commit/?id=9c125336727b48c576bf3598d7d2c52daa5909d7
commit 9c125336727b48c576bf3598d7d2c52daa5909d7
Author: Kristof Provost <kp@FreeBSD.org>
AuthorDate: 2024-10-11 09:02:27 +0000
Commit: Kristof Provost <kp@FreeBSD.org>
CommitDate: 2024-10-15 14:29:11 +0000
pf: convert DIOCGETSRCNODES to netlink
Sponsored by: Rubicon Communications, LLC ("Netgate")
---
lib/libpfctl/libpfctl.c | 68 +++++++++++++++++++++++++++++++++++++++++
lib/libpfctl/libpfctl.h | 24 +++++++++++++++
sbin/pfctl/pfctl.c | 56 +++++++++++-----------------------
sbin/pfctl/pfctl_parser.c | 29 ++++++++----------
sbin/pfctl/pfctl_parser.h | 2 +-
sys/netpfil/pf/pf_nl.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++
sys/netpfil/pf/pf_nl.h | 27 ++++++++++++++++
7 files changed, 229 insertions(+), 55 deletions(-)
diff --git a/lib/libpfctl/libpfctl.c b/lib/libpfctl/libpfctl.c
index e0d93041c551..4634fa99cb19 100644
--- a/lib/libpfctl/libpfctl.c
+++ b/lib/libpfctl/libpfctl.c
@@ -2998,3 +2998,71 @@ pfctl_get_ruleset(struct pfctl_handle *h, const char *path, uint32_t nr, struct
return (e.error);
}
+#define _OUT(_field) offsetof(struct pfctl_threshold, _field)
+static const struct snl_attr_parser ap_pfctl_threshold[] = {
+ { .type = PF_TH_LIMIT, .off = _OUT(limit), .cb = snl_attr_get_uint32 },
+ { .type = PF_TH_SECONDS, .off = _OUT(seconds), .cb = snl_attr_get_uint32 },
+ { .type = PF_TH_COUNT, .off = _OUT(count), .cb = snl_attr_get_uint32 },
+ { .type = PF_TH_LAST, .off = _OUT(last), .cb = snl_attr_get_uint32 },
+};
+SNL_DECLARE_ATTR_PARSER(pfctl_threshold_parser, ap_pfctl_threshold);
+#undef _OUT
+
+#define _OUT(_field) offsetof(struct pfctl_src_node, _field)
+static struct snl_attr_parser ap_srcnode[] = {
+ { .type = PF_SN_ADDR, .off = _OUT(addr), .cb = snl_attr_get_in6_addr },
+ { .type = PF_SN_RADDR, .off = _OUT(raddr), .cb = snl_attr_get_in6_addr },
+ { .type = PF_SN_RULE_NR, .off = _OUT(rule), .cb = snl_attr_get_uint32 },
+ { .type = PF_SN_BYTES_IN, .off = _OUT(bytes[0]), .cb = snl_attr_get_uint64 },
+ { .type = PF_SN_BYTES_OUT, .off = _OUT(bytes[1]), .cb = snl_attr_get_uint64 },
+ { .type = PF_SN_PACKETS_IN, .off = _OUT(packets[0]), .cb = snl_attr_get_uint64 },
+ { .type = PF_SN_PACKETS_OUT, .off = _OUT(packets[1]), .cb = snl_attr_get_uint64 },
+ { .type = PF_SN_STATES, .off = _OUT(states), .cb = snl_attr_get_uint32 },
+ { .type = PF_SN_CONNECTIONS, .off = _OUT(conn), .cb = snl_attr_get_uint32 },
+ { .type = PF_SN_AF, .off = _OUT(af), .cb = snl_attr_get_uint8 },
+ { .type = PF_SN_RULE_TYPE, .off = _OUT(ruletype), .cb = snl_attr_get_uint8 },
+ { .type = PF_SN_CREATION, .off = _OUT(creation), .cb = snl_attr_get_uint64 },
+ { .type = PF_SN_EXPIRE, .off = _OUT(expire), .cb = snl_attr_get_uint64 },
+ { .type = PF_SN_CONNECTION_RATE, .off = _OUT(conn_rate), .arg = &pfctl_threshold_parser, .cb = snl_attr_get_nested },
+};
+static struct snl_field_parser fp_srcnode[] = {};
+#undef _OUT
+SNL_DECLARE_PARSER(srcnode_parser, struct genlmsghdr, fp_srcnode, ap_srcnode);
+
+int
+pfctl_get_srcnodes(struct pfctl_handle *h, pfctl_get_srcnode_fn fn, void *arg)
+{
+ struct snl_writer nw;
+ struct pfctl_src_node sn;
+ struct snl_errmsg_data e = {};
+ struct nlmsghdr *hdr;
+ uint32_t seq_id;
+ int family_id;
+ int ret;
+
+ family_id = snl_get_genl_family(&h->ss, PFNL_FAMILY_NAME);
+ if (family_id == 0)
+ return (ENOTSUP);
+
+ snl_init_writer(&h->ss, &nw);
+ hdr = snl_create_genl_msg_request(&nw, family_id, PFNL_CMD_GET_SRCNODES);
+
+ if ((hdr = snl_finalize_msg(&nw)) == NULL)
+ return (ENXIO);
+
+ seq_id = hdr->nlmsg_seq;
+
+ if (!snl_send_message(&h->ss, hdr))
+ return (ENXIO);
+
+ while ((hdr = snl_read_reply_multi(&h->ss, seq_id, &e)) != NULL) {
+ if (!snl_parse_nlmsg(&h->ss, hdr, &srcnode_parser, &sn))
+ continue;
+
+ ret = fn(&sn, arg);
+ if (ret != 0)
+ return (ret);
+ }
+
+ return (e.error);
+}
diff --git a/lib/libpfctl/libpfctl.h b/lib/libpfctl/libpfctl.h
index 4da21774a958..5c3f1376960c 100644
--- a/lib/libpfctl/libpfctl.h
+++ b/lib/libpfctl/libpfctl.h
@@ -386,6 +386,28 @@ struct pfctl_syncookies {
uint32_t halfopen_states;
};
+struct pfctl_threshold {
+ uint32_t limit;
+ uint32_t seconds;
+ uint32_t count;
+ uint32_t last;
+};
+
+struct pfctl_src_node {
+ struct pf_addr addr;
+ struct pf_addr raddr;
+ int rule;
+ uint64_t bytes[2];
+ uint64_t packets[2];
+ uint32_t states;
+ uint32_t conn;
+ sa_family_t af;
+ uint8_t ruletype;
+ uint64_t creation;
+ uint64_t expire;
+ struct pfctl_threshold conn_rate;
+};
+
#define PF_DEVICE "/dev/pf"
struct pfctl_handle;
@@ -506,5 +528,7 @@ int pfctl_get_addr(struct pfctl_handle *h, uint32_t ticket, uint32_t r_num,
uint8_t r_action, const char *anchor, uint32_t nr, struct pfioc_pooladdr *pa);
int pfctl_get_rulesets(struct pfctl_handle *h, const char *path, uint32_t *nr);
int pfctl_get_ruleset(struct pfctl_handle *h, const char *path, uint32_t nr, struct pfioc_ruleset *rs);
+typedef int (*pfctl_get_srcnode_fn)(struct pfctl_src_node*, void *);
+int pfctl_get_srcnodes(struct pfctl_handle *h, pfctl_get_srcnode_fn fn, void *arg);
#endif
diff --git a/sbin/pfctl/pfctl.c b/sbin/pfctl/pfctl.c
index 4ca77f6c5f4a..555c5181eac8 100644
--- a/sbin/pfctl/pfctl.c
+++ b/sbin/pfctl/pfctl.c
@@ -1519,51 +1519,31 @@ pfctl_show_nat(int dev, char *path, int opts, char *anchorname, int depth,
return (0);
}
-int
-pfctl_show_src_nodes(int dev, int opts)
+static int
+pfctl_print_src_node(struct pfctl_src_node *sn, void *arg)
{
- struct pfioc_src_nodes psn;
- struct pf_src_node *p;
- char *inbuf = NULL, *newinbuf = NULL;
- unsigned int len = 0;
- int i;
+ int *opts = (int *)arg;
- memset(&psn, 0, sizeof(psn));
- for (;;) {
- psn.psn_len = len;
- if (len) {
- newinbuf = realloc(inbuf, len);
- if (newinbuf == NULL)
- err(1, "realloc");
- psn.psn_buf = inbuf = newinbuf;
- }
- if (ioctl(dev, DIOCGETSRCNODES, &psn) < 0) {
- warn("DIOCGETSRCNODES");
- free(inbuf);
- return (-1);
- }
- if (psn.psn_len + sizeof(struct pfioc_src_nodes) < len)
- break;
- if (len == 0 && psn.psn_len == 0)
- goto done;
- if (len == 0 && psn.psn_len != 0)
- len = psn.psn_len;
- if (psn.psn_len == 0)
- goto done; /* no src_nodes */
- len *= 2;
- }
- p = psn.psn_src_nodes;
- if (psn.psn_len > 0 && (opts & PF_OPT_SHOWALL))
+ if (*opts & PF_OPT_SHOWALL) {
pfctl_print_title("SOURCE TRACKING NODES:");
- for (i = 0; i < psn.psn_len; i += sizeof(*p)) {
- print_src_node(p, opts);
- p++;
+ *opts &= ~PF_OPT_SHOWALL;
}
-done:
- free(inbuf);
+
+ print_src_node(sn, *opts);
+
return (0);
}
+int
+pfctl_show_src_nodes(int dev, int opts)
+{
+ int error;
+
+ error = pfctl_get_srcnodes(pfh, pfctl_print_src_node, &opts);
+
+ return (error);
+}
+
struct pfctl_show_state_arg {
int opts;
int dotitle;
diff --git a/sbin/pfctl/pfctl_parser.c b/sbin/pfctl/pfctl_parser.c
index 70c2ad42ca55..c25e96e645fb 100644
--- a/sbin/pfctl/pfctl_parser.c
+++ b/sbin/pfctl/pfctl_parser.c
@@ -58,6 +58,7 @@
#include <errno.h>
#include <err.h>
#include <ifaddrs.h>
+#include <inttypes.h>
#include <unistd.h>
#include "pfctl_parser.h"
@@ -648,10 +649,10 @@ print_running(struct pfctl_status *status)
}
void
-print_src_node(struct pf_src_node *sn, int opts)
+print_src_node(struct pfctl_src_node *sn, int opts)
{
struct pf_addr_wrap aw;
- int min, sec;
+ uint64_t min, sec;
memset(&aw, 0, sizeof(aw));
if (sn->af == AF_INET)
@@ -672,36 +673,32 @@ print_src_node(struct pf_src_node *sn, int opts)
sn->creation /= 60;
min = sn->creation % 60;
sn->creation /= 60;
- printf(" age %.2u:%.2u:%.2u", sn->creation, min, sec);
+ printf(" age %.2" PRIu64 ":%.2" PRIu64 ":%.2" PRIu64,
+ sn->creation, min, sec);
if (sn->states == 0) {
sec = sn->expire % 60;
sn->expire /= 60;
min = sn->expire % 60;
sn->expire /= 60;
- printf(", expires in %.2u:%.2u:%.2u",
+ printf(", expires in %.2" PRIu64 ":%.2" PRIu64 ":%.2" PRIu64,
sn->expire, min, sec);
}
- printf(", %llu pkts, %llu bytes",
-#ifdef __FreeBSD__
- (unsigned long long)(sn->packets[0] + sn->packets[1]),
- (unsigned long long)(sn->bytes[0] + sn->bytes[1]));
-#else
+ printf(", %" PRIu64 " pkts, %" PRIu64 " bytes",
sn->packets[0] + sn->packets[1],
sn->bytes[0] + sn->bytes[1]);
-#endif
switch (sn->ruletype) {
case PF_NAT:
- if (sn->rule.nr != -1)
- printf(", nat rule %u", sn->rule.nr);
+ if (sn->rule != -1)
+ printf(", nat rule %u", sn->rule);
break;
case PF_RDR:
- if (sn->rule.nr != -1)
- printf(", rdr rule %u", sn->rule.nr);
+ if (sn->rule != -1)
+ printf(", rdr rule %u", sn->rule);
break;
case PF_PASS:
case PF_MATCH:
- if (sn->rule.nr != -1)
- printf(", filter rule %u", sn->rule.nr);
+ if (sn->rule != -1)
+ printf(", filter rule %u", sn->rule);
break;
}
printf("\n");
diff --git a/sbin/pfctl/pfctl_parser.h b/sbin/pfctl/pfctl_parser.h
index 550005508f40..e6959e0b95a7 100644
--- a/sbin/pfctl/pfctl_parser.h
+++ b/sbin/pfctl/pfctl_parser.h
@@ -302,7 +302,7 @@ int parse_flags(char *);
int pfctl_load_anchors(int, struct pfctl *, struct pfr_buffer *);
void print_pool(struct pfctl_pool *, u_int16_t, u_int16_t, sa_family_t, int);
-void print_src_node(struct pf_src_node *, int);
+void print_src_node(struct pfctl_src_node *, int);
void print_eth_rule(struct pfctl_eth_rule *, const char *, int);
void print_rule(struct pfctl_rule *, const char *, int, int);
void print_tabledef(const char *, int, int, struct node_tinithead *);
diff --git a/sys/netpfil/pf/pf_nl.c b/sys/netpfil/pf/pf_nl.c
index c75af9091d08..67047a319fb8 100644
--- a/sys/netpfil/pf/pf_nl.c
+++ b/sys/netpfil/pf/pf_nl.c
@@ -1713,6 +1713,77 @@ pf_handle_get_ruleset(struct nlmsghdr *hdr, struct nl_pstate *npt)
return (0);
}
+static bool
+nlattr_add_pf_threshold(struct nl_writer *nw, int attrtype, struct pf_threshold *t)
+{
+ int off = nlattr_add_nested(nw, attrtype);
+
+ nlattr_add_u32(nw, PF_TH_LIMIT, t->limit);
+ nlattr_add_u32(nw, PF_TH_SECONDS, t->seconds);
+ nlattr_add_u32(nw, PF_TH_COUNT, t->count);
+ nlattr_add_u32(nw, PF_TH_LAST, t->last);
+
+ nlattr_set_len(nw, off);
+
+ return (true);
+}
+
+static int
+pf_handle_get_srcnodes(struct nlmsghdr *hdr, struct nl_pstate *npt)
+{
+ struct nl_writer *nw = npt->nw;
+ struct genlmsghdr *ghdr_new;
+ struct pf_ksrc_node *n;
+ struct pf_srchash *sh;
+ int i;
+
+ hdr->nlmsg_flags |= NLM_F_MULTI;
+
+ for (i = 0, sh = V_pf_srchash; i <= V_pf_srchashmask;
+ i++, sh++) {
+ /* Avoid locking empty rows. */
+ if (LIST_EMPTY(&sh->nodes))
+ continue;
+
+ PF_HASHROW_LOCK(sh);
+ LIST_FOREACH(n, &sh->nodes, entry) {
+ if (!nlmsg_reply(nw, hdr, sizeof(struct genlmsghdr))) {
+ nlmsg_abort(nw);
+ return (ENOMEM);
+ }
+
+ ghdr_new = nlmsg_reserve_object(nw, struct genlmsghdr);
+ ghdr_new->cmd = PFNL_CMD_GET_SRCNODES;
+ ghdr_new->version = 0;
+ ghdr_new->reserved = 0;
+
+ nlattr_add_in6_addr(nw, PF_SN_ADDR, &n->addr.v6);
+ nlattr_add_in6_addr(nw, PF_SN_RADDR, &n->raddr.v6);
+ nlattr_add_u32(nw, PF_SN_RULE_NR, n->rule->nr);
+ nlattr_add_u64(nw, PF_SN_BYTES_IN, counter_u64_fetch(n->bytes[0]));
+ nlattr_add_u64(nw, PF_SN_BYTES_OUT, counter_u64_fetch(n->bytes[1]));
+ nlattr_add_u64(nw, PF_SN_PACKETS_IN, counter_u64_fetch(n->packets[0]));
+ nlattr_add_u64(nw, PF_SN_PACKETS_OUT, counter_u64_fetch(n->packets[1]));
+ nlattr_add_u32(nw, PF_SN_STATES, n->states);
+ nlattr_add_u32(nw, PF_SN_CONNECTIONS, n->conn);
+ nlattr_add_u8(nw, PF_SN_AF, n->af);
+ nlattr_add_u8(nw, PF_SN_RULE_TYPE, n->ruletype);
+ nlattr_add_u64(nw, PF_SN_CREATION, n->creation);
+ nlattr_add_u64(nw, PF_SN_EXPIRE, n->expire);
+ nlattr_add_pf_threshold(nw, PF_SN_CONNECTION_RATE, &n->conn_rate);
+
+ if (!nlmsg_end(nw)) {
+ PF_HASHROW_UNLOCK(sh);
+ nlmsg_abort(nw);
+ return (ENOMEM);
+ }
+ }
+ PF_HASHROW_UNLOCK(sh);
+ }
+
+ return (0);
+}
+
static const struct nlhdr_parser *all_parsers[] = {
&state_parser,
&addrule_parser,
@@ -1899,6 +1970,13 @@ static const struct genl_cmd pf_cmds[] = {
.cmd_flags = GENL_CMD_CAP_DUMP | GENL_CMD_CAP_HASPOL,
.cmd_priv = PRIV_NETINET_PF,
},
+ {
+ .cmd_num = PFNL_CMD_GET_SRCNODES,
+ .cmd_name = "GET_SRCNODES",
+ .cmd_cb = pf_handle_get_srcnodes,
+ .cmd_flags = GENL_CMD_CAP_DUMP | GENL_CMD_CAP_HASPOL,
+ .cmd_priv = PRIV_NETINET_PF,
+ },
};
void
diff --git a/sys/netpfil/pf/pf_nl.h b/sys/netpfil/pf/pf_nl.h
index 0ec68658dcf3..e0b8989ab255 100644
--- a/sys/netpfil/pf/pf_nl.h
+++ b/sys/netpfil/pf/pf_nl.h
@@ -60,6 +60,7 @@ enum {
PFNL_CMD_GET_ADDR = 22,
PFNL_CMD_GET_RULESETS = 23,
PFNL_CMD_GET_RULESET = 24,
+ PFNL_CMD_GET_SRCNODES = 25,
__PFNL_CMD_MAX,
};
#define PFNL_CMD_MAX (__PFNL_CMD_MAX -1)
@@ -389,6 +390,32 @@ enum pf_get_rulesets_types_t {
PF_RS_NAME = 3, /* string */
};
+enum pf_threshold_types_t {
+ PF_TH_UNSPEC,
+ PF_TH_LIMIT = 1, /* u32 */
+ PF_TH_SECONDS = 2, /* u32 */
+ PF_TH_COUNT = 3, /* u32 */
+ PF_TH_LAST = 4, /* u32 */
+};
+
+enum pf_srcnodes_types_t {
+ PF_SN_UNSPEC,
+ PF_SN_ADDR = 1, /* nested, pf_addr */
+ PF_SN_RADDR = 2, /* nested, pf_addr */
+ PF_SN_RULE_NR = 3, /* u32 */
+ PF_SN_BYTES_IN = 4, /* u64 */
+ PF_SN_BYTES_OUT = 5, /* u64 */
+ PF_SN_PACKETS_IN = 6, /* u64 */
+ PF_SN_PACKETS_OUT = 7, /* u64 */
+ PF_SN_STATES = 8, /* u32 */
+ PF_SN_CONNECTIONS = 9, /* u32 */
+ PF_SN_AF = 10, /* u8 */
+ PF_SN_RULE_TYPE = 11, /* u8 */
+ PF_SN_CREATION = 12, /* u64 */
+ PF_SN_EXPIRE = 13, /* u64 */
+ PF_SN_CONNECTION_RATE = 14, /* nested, pf_threshold */
+};
+
#ifdef _KERNEL
void pf_nl_register(void);