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authorAnder Juaristi <a@juaristi.eus>2019-04-26 09:58:07 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2019-04-30 14:11:54 +0200
commitcc919f7013d2d76c8bef0b9c562c1faf98a095a3 (patch)
treea9d3a14896b685d4602d18db29f547d56c0463ed
parent4f639231c83b09ea004c03e95c702b7750bf9930 (diff)
IPFIX: Introduce template record supportHEADmaster
This commit adds the ability to send template records to the remote collector. In addition, it also introduces a new configuration parameter 'send_template', which tells when template records should be sent. It accepts the following string values: - "once": Send the template record only the first time (might be coalesced with data records). - "always": Send the template record always, with every data record that is sent to the collector (multiple data records might be sent together). - "never": Assume the collector knows the schema already. Do not send template records. If omitted, the default value for 'send_template' is "once". Signed-off-by: Ander Juaristi <a@juaristi.eus> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
-rw-r--r--include/ulogd/ipfix_protocol.h1
-rw-r--r--output/ipfix/ipfix.c97
-rw-r--r--output/ipfix/ipfix.h22
-rw-r--r--output/ipfix/ulogd_output_IPFIX.c56
4 files changed, 139 insertions, 37 deletions
diff --git a/include/ulogd/ipfix_protocol.h b/include/ulogd/ipfix_protocol.h
index aef47f0..01dd96a 100644
--- a/include/ulogd/ipfix_protocol.h
+++ b/include/ulogd/ipfix_protocol.h
@@ -129,6 +129,7 @@ enum {
/* reserved */
IPFIX_fragmentOffsetIPv4 = 88,
/* reserved */
+ IPFIX_applicationId = 95,
IPFIX_bgpNextAdjacentAsNumber = 128,
IPFIX_bgpPrevAdjacentAsNumber = 129,
IPFIX_exporterIPv4Address = 130,
diff --git a/output/ipfix/ipfix.c b/output/ipfix/ipfix.c
index 60a4c7f..4bb432a 100644
--- a/output/ipfix/ipfix.c
+++ b/output/ipfix/ipfix.c
@@ -2,6 +2,7 @@
* ipfix.c
*
* Holger Eitzenberger, 2009.
+ * Ander Juaristi, 2019
*/
/* These forward declarations are needed since ulogd.h doesn't like to be the first */
@@ -13,25 +14,107 @@
#include <ulogd/ulogd.h>
#include <ulogd/common.h>
+#include <ulogd/ipfix_protocol.h>
+
+struct ipfix_templ_elem {
+ uint16_t id;
+ uint16_t len;
+};
+
+struct ipfix_templ {
+ unsigned int num_templ_elements;
+ struct ipfix_templ_elem templ_elements[];
+};
+
+/* Template fields modeled after vy_ipfix_data */
+static const struct ipfix_templ template = {
+ .num_templ_elements = 10,
+ .templ_elements = {
+ {
+ .id = IPFIX_sourceIPv4Address,
+ .len = sizeof(uint32_t)
+ },
+ {
+ .id = IPFIX_destinationIPv4Address,
+ .len = sizeof(uint32_t)
+ },
+ {
+ .id = IPFIX_packetTotalCount,
+ .len = sizeof(uint32_t)
+ },
+ {
+ .id = IPFIX_octetTotalCount,
+ .len = sizeof(uint32_t)
+ },
+ {
+ .id = IPFIX_flowStartSeconds,
+ .len = sizeof(uint32_t)
+ },
+ {
+ .id = IPFIX_flowEndSeconds,
+ .len = sizeof(uint32_t)
+ },
+ {
+ .id = IPFIX_sourceTransportPort,
+ .len = sizeof(uint16_t)
+ },
+ {
+ .id = IPFIX_destinationTransportPort,
+ .len = sizeof(uint16_t)
+ },
+ {
+ .id = IPFIX_protocolIdentifier,
+ .len = sizeof(uint8_t)
+ },
+ {
+ .id = IPFIX_applicationId,
+ .len = sizeof(uint32_t)
+ }
+ }
+};
-struct ipfix_msg *ipfix_msg_alloc(size_t len, uint32_t oid)
+struct ipfix_msg *ipfix_msg_alloc(size_t len, uint32_t oid, int tid)
{
struct ipfix_msg *msg;
struct ipfix_hdr *hdr;
+ struct ipfix_templ_hdr *templ_hdr;
+ struct ipfix_templ_elem *elem;
+ unsigned int i = 0;
- if (len < IPFIX_HDRLEN + IPFIX_SET_HDRLEN)
+ if ((tid > 0 && len < IPFIX_HDRLEN + IPFIX_TEMPL_HDRLEN(template.num_templ_elements) + IPFIX_SET_HDRLEN) ||
+ (len < IPFIX_HDRLEN + IPFIX_SET_HDRLEN))
return NULL;
msg = malloc(sizeof(struct ipfix_msg) + len);
memset(msg, 0, sizeof(struct ipfix_msg));
- msg->tail = msg->data + IPFIX_HDRLEN;
+ msg->tid = tid;
msg->end = msg->data + len;
+ msg->tail = msg->data + IPFIX_HDRLEN;
+ if (tid > 0)
+ msg->tail += IPFIX_TEMPL_HDRLEN(template.num_templ_elements);
+ /* Initialize message header */
hdr = ipfix_msg_hdr(msg);
memset(hdr, 0, IPFIX_HDRLEN);
hdr->version = htons(IPFIX_VERSION);
hdr->oid = htonl(oid);
+ if (tid > 0) {
+ /* Initialize template record header */
+ templ_hdr = ipfix_msg_templ_hdr(msg);
+ templ_hdr->sid = htons(2);
+ templ_hdr->tid = htons(tid);
+ templ_hdr->len = htons(IPFIX_TEMPL_HDRLEN(template.num_templ_elements));
+ templ_hdr->cnt = htons(template.num_templ_elements);
+
+ while (i < template.num_templ_elements) {
+ elem = (struct ipfix_templ_elem *) &templ_hdr->data[i * 4];
+ elem->id = htons(template.templ_elements[i].id);
+ elem->len = htons(template.templ_elements[i].len);
+ i++;
+ }
+ }
+
return msg;
}
@@ -47,6 +130,14 @@ void ipfix_msg_free(struct ipfix_msg *msg)
free(msg);
}
+struct ipfix_templ_hdr *ipfix_msg_templ_hdr(const struct ipfix_msg *msg)
+{
+ if (msg->tid > 0)
+ return (struct ipfix_templ_hdr *) (msg->data + IPFIX_HDRLEN);
+
+ return NULL;
+}
+
struct ipfix_hdr *ipfix_msg_hdr(const struct ipfix_msg *msg)
{
return (struct ipfix_hdr *)msg->data;
diff --git a/output/ipfix/ipfix.h b/output/ipfix/ipfix.h
index cdb5a6f..93945fb 100644
--- a/output/ipfix/ipfix.h
+++ b/output/ipfix/ipfix.h
@@ -2,6 +2,7 @@
* ipfix.h
*
* Holger Eitzenberger <holger@eitzenberger.org>, 2009.
+ * Ander Juaristi <a@juaristi.eus>, 2019
*/
#ifndef IPFIX_H
#define IPFIX_H
@@ -20,17 +21,21 @@ struct ipfix_hdr {
uint8_t data[];
} __packed;
-#define IPFIX_HDRLEN sizeof(struct ipfix_hdr)
+#define IPFIX_HDRLEN sizeof(struct ipfix_hdr)
/*
* IDs 0-255 are reserved for Template Sets. IDs of Data Sets are > 255.
*/
struct ipfix_templ_hdr {
- uint16_t id;
+ uint16_t sid;
+ uint16_t len;
+ uint16_t tid;
uint16_t cnt;
uint8_t data[];
} __packed;
+#define IPFIX_TEMPL_HDRLEN(nfields) sizeof(struct ipfix_templ_hdr) + (sizeof(uint16_t) * 2 * nfields)
+
struct ipfix_set_hdr {
#define IPFIX_SET_TEMPL 2
#define IPFIX_SET_OPT_TEMPL 3
@@ -46,6 +51,7 @@ struct ipfix_msg {
uint8_t *tail;
uint8_t *end;
unsigned nrecs;
+ int tid;
struct ipfix_set_hdr *last_set;
uint8_t data[];
};
@@ -53,18 +59,14 @@ struct ipfix_msg {
struct vy_ipfix_data {
struct in_addr saddr;
struct in_addr daddr;
- uint16_t ifi_in;
- uint16_t ifi_out;
uint32_t packets;
uint32_t bytes;
uint32_t start; /* Unix time */
uint32_t end; /* Unix time */
uint16_t sport;
uint16_t dport;
- uint32_t aid; /* Application ID */
uint8_t l4_proto;
- uint8_t dscp;
- uint16_t __padding;
+ uint32_t aid; /* Application ID */
} __packed;
#define VY_IPFIX_SID 256
@@ -73,13 +75,11 @@ struct vy_ipfix_data {
#define VY_IPFIX_PKT_LEN (IPFIX_HDRLEN + IPFIX_SET_HDRLEN \
+ VY_IPFIX_FLOWS * sizeof(struct vy_ipfix_data))
-/* template management */
-size_t ipfix_rec_len(uint16_t);
-
/* message handling */
-struct ipfix_msg *ipfix_msg_alloc(size_t, uint32_t);
+struct ipfix_msg *ipfix_msg_alloc(size_t, uint32_t, int);
void ipfix_msg_free(struct ipfix_msg *);
struct ipfix_hdr *ipfix_msg_hdr(const struct ipfix_msg *);
+struct ipfix_templ_hdr *ipfix_msg_templ_hdr(const struct ipfix_msg *);
size_t ipfix_msg_len(const struct ipfix_msg *);
void *ipfix_msg_data(struct ipfix_msg *);
struct ipfix_set_hdr *ipfix_msg_add_set(struct ipfix_msg *, uint16_t);
diff --git a/output/ipfix/ulogd_output_IPFIX.c b/output/ipfix/ulogd_output_IPFIX.c
index ec143b1..5b59003 100644
--- a/output/ipfix/ulogd_output_IPFIX.c
+++ b/output/ipfix/ulogd_output_IPFIX.c
@@ -3,6 +3,9 @@
*
* ulogd IPFIX Exporter plugin.
*
+ * (C) 2009 by Holger Eitzenberger <holger@eitzenberger.org>, Astaro AG
+ * (C) 2019 by Ander Juaristi <a@juaristi.eus>
+ *
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
@@ -11,8 +14,6 @@
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Holger Eitzenberger <holger@eitzenberger.org> Astaro AG 2009
*/
#include <unistd.h>
#include <time.h>
@@ -28,6 +29,7 @@
#define DEFAULT_MTU 512 /* RFC 5101, 10.3.3 */
#define DEFAULT_PORT 4739 /* RFC 5101, 10.3.4 */
#define DEFAULT_SPORT 4740
+#define DEFAULT_SEND_TEMPLATE "once"
enum {
OID_CE = 0,
@@ -35,16 +37,18 @@ enum {
PORT_CE,
PROTO_CE,
MTU_CE,
+ SEND_TEMPLATE_CE
};
-#define oid_ce(x) (x->ces[OID_CE])
-#define host_ce(x) (x->ces[HOST_CE])
-#define port_ce(x) (x->ces[PORT_CE])
-#define proto_ce(x) (x->ces[PROTO_CE])
-#define mtu_ce(x) (x->ces[MTU_CE])
+#define oid_ce(x) (x->ces[OID_CE])
+#define host_ce(x) (x->ces[HOST_CE])
+#define port_ce(x) (x->ces[PORT_CE])
+#define proto_ce(x) (x->ces[PROTO_CE])
+#define mtu_ce(x) (x->ces[MTU_CE])
+#define send_template_ce(x) (x->ces[SEND_TEMPLATE_CE])
static const struct config_keyset ipfix_kset = {
- .num_ces = 5,
+ .num_ces = 6,
.ces = {
{
.key = "oid",
@@ -70,20 +74,21 @@ static const struct config_keyset ipfix_kset = {
.key = "mtu",
.type = CONFIG_TYPE_INT,
.u.value = DEFAULT_MTU
+ },
+ {
+ .key = "send_template",
+ .type = CONFIG_TYPE_STRING,
+ .u.string = DEFAULT_SEND_TEMPLATE
}
}
};
-struct ipfix_templ {
- struct ipfix_templ *next;
-};
-
struct ipfix_priv {
struct ulogd_fd ufd;
uint32_t seqno;
struct ipfix_msg *msg; /* current message */
struct llist_head list;
- struct ipfix_templ *templates;
+ int tid;
int proto;
struct ulogd_timer timer;
struct sockaddr_in sa;
@@ -258,8 +263,8 @@ static void ipfix_timer_cb(struct ulogd_timer *t, void *data)
static int ipfix_configure(struct ulogd_pluginstance *pi, struct ulogd_pluginstance_stack *stack)
{
struct ipfix_priv *priv = (struct ipfix_priv *) &pi->private;
+ char *host, *proto, *send_template;
int oid, port, mtu, ret;
- char *host, *proto;
char addr[16];
ret = config_parse_file(pi->id, pi->config_kset);
@@ -271,6 +276,7 @@ static int ipfix_configure(struct ulogd_pluginstance *pi, struct ulogd_pluginsta
port = port_ce(pi->config_kset).u.value;
proto = proto_ce(pi->config_kset).u.string;
mtu = mtu_ce(pi->config_kset).u.value;
+ send_template = send_template_ce(pi->config_kset).u.string;
if (!oid) {
ulogd_log(ULOGD_FATAL, "invalid Observation ID\n");
@@ -303,6 +309,8 @@ static int ipfix_configure(struct ulogd_pluginstance *pi, struct ulogd_pluginsta
ulogd_init_timer(&priv->timer, pi, ipfix_timer_cb);
+ priv->tid = (strcmp(send_template, "never") ? VY_IPFIX_SID : -1);
+
ulogd_log(ULOGD_INFO, "using IPFIX Collector at %s:%d (MTU %d)\n",
inet_ntop(AF_INET, &priv->sa.sin_addr, addr, sizeof(addr)),
port, mtu);
@@ -410,25 +418,30 @@ static int ipfix_stop(struct ulogd_pluginstance *pi)
static int ipfix_interp(struct ulogd_pluginstance *pi)
{
struct ipfix_priv *priv = (struct ipfix_priv *) &pi->private;
+ char saddr[16], daddr[16], *send_template;
struct vy_ipfix_data *data;
int oid, mtu, ret;
- char addr[16];
if (!(GET_FLAGS(pi->input.keys, InIpSaddr) & ULOGD_RETF_VALID))
return ULOGD_IRET_OK;
oid = oid_ce(pi->config_kset).u.value;
mtu = mtu_ce(pi->config_kset).u.value;
+ send_template = send_template_ce(pi->config_kset).u.string;
again:
if (!priv->msg) {
- priv->msg = ipfix_msg_alloc(mtu, oid);
+ priv->msg = ipfix_msg_alloc(mtu, oid, priv->tid);
if (!priv->msg) {
/* just drop this flow */
ulogd_log(ULOGD_ERROR, "out of memory, dropping flow\n");
return ULOGD_IRET_OK;
}
ipfix_msg_add_set(priv->msg, VY_IPFIX_SID);
+
+ /* template sent - do not send it again the next time */
+ if (priv->tid == VY_IPFIX_SID && strcmp(send_template, "once") == 0)
+ priv->tid = -1;
}
data = ipfix_msg_add_data(priv->msg, sizeof(struct vy_ipfix_data));
@@ -439,8 +452,6 @@ again:
goto again;
}
- data->ifi_in = data->ifi_out = 0;
-
data->saddr.s_addr = ikey_get_u32(&pi->input.keys[InIpSaddr]);
data->daddr.s_addr = ikey_get_u32(&pi->input.keys[InIpDaddr]);
@@ -462,13 +473,12 @@ again:
data->aid = htonl(ikey_get_u32(&pi->input.keys[InCtMark]));
data->l4_proto = ikey_get_u8(&pi->input.keys[InIpProto]);
- data->__padding = 0;
ulogd_log(ULOGD_DEBUG, "Got new packet (packets = %u, bytes = %u, flow = (%u, %u), saddr = %s, daddr = %s, sport = %u, dport = %u)\n",
- ntohl(data->packets), ntohl(data->bytes), ntohl(data->start), ntohl(data->end),
- inet_ntop(AF_INET, &data->saddr.s_addr, addr, sizeof(addr)),
- inet_ntop(AF_INET, &data->daddr.s_addr, addr, sizeof(addr)),
- ntohs(data->sport), ntohs(data->dport));
+ ntohl(data->packets), ntohl(data->bytes), ntohl(data->start), ntohl(data->end),
+ inet_ntop(AF_INET, &data->saddr.s_addr, saddr, sizeof(saddr)),
+ inet_ntop(AF_INET, &data->daddr.s_addr, daddr, sizeof(daddr)),
+ ntohs(data->sport), ntohs(data->dport));
if ((ret = send_msgs(pi)) < 0)
return ret;