conntrack/snprintf_default.c
/*
* (C) 2005-2011 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include "internal/internal.h"
static int __snprintf_l3protocol(char *buf,
unsigned int len,
const struct nf_conntrack *ct)
{
uint8_t num = ct->head.orig.l3protonum;
if (!test_bit(ATTR_ORIG_L3PROTO, ct->head.set))
return -1;
return snprintf(buf, len, "%-8s %u ", __l3proto2str(num), num);
}
int __snprintf_protocol(char *buf,
unsigned int len,
const struct nf_conntrack *ct)
{
uint8_t num = ct->head.orig.protonum;
if (!test_bit(ATTR_ORIG_L4PROTO, ct->head.set))
return -1;
return snprintf(buf, len, "%-8s %u ", __proto2str(num), num);
}
static int __snprintf_timeout(char *buf,
unsigned int len,
const struct nf_conntrack *ct)
{
return snprintf(buf, len, "%u ", ct->timeout);
}
static int __snprintf_protoinfo(char *buf,
unsigned int len,
const struct nf_conntrack *ct)
{
uint8_t state = ct->protoinfo.tcp.state;
const char *str = NULL;
if (state < ARRAY_SIZE(states))
str = states[state];
if (str == NULL)
str = states[TCP_CONNTRACK_NONE];
return snprintf(buf, len, "%s ", str);
}
static int __snprintf_protoinfo_sctp(char *buf,
unsigned int len,
const struct nf_conntrack *ct)
{
uint8_t state = ct->protoinfo.sctp.state;
const char *str = NULL;
if (state < ARRAY_SIZE(sctp_states))
str = sctp_states[state];
if (str == NULL)
str = sctp_states[SCTP_CONNTRACK_NONE];
return snprintf(buf, len, "%s ", str);
}
static int __snprintf_protoinfo_dccp(char *buf,
unsigned int len,
const struct nf_conntrack *ct)
{
const char *str = NULL;
uint8_t state = ct->protoinfo.dccp.state;
if (state < ARRAY_SIZE(dccp_states))
str = dccp_states[state];
if (str == NULL)
str = dccp_states[DCCP_CONNTRACK_NONE];
return snprintf(buf, len, "%s ", str);
}
static int __snprintf_address_ipv4(char *buf,
unsigned int len,
const struct __nfct_tuple *tuple,
const char *src_tag,
const char *dst_tag)
{
int ret, size = 0, offset = 0;
struct in_addr src = { .s_addr = tuple->src.v4 };
struct in_addr dst = { .s_addr = tuple->dst.v4 };
ret = snprintf(buf, len, "%s=%s ", src_tag, inet_ntoa(src));
BUFFER_SIZE(ret, size, len, offset);
ret = snprintf(buf+offset, len, "%s=%s ", dst_tag, inet_ntoa(dst));
BUFFER_SIZE(ret, size, len, offset);
return size;
}
static int __snprintf_address_ipv6(char *buf,
unsigned int len,
const struct __nfct_tuple *tuple,
const char *src_tag,
const char *dst_tag)
{
int ret, size = 0, offset = 0;
struct in6_addr src;
struct in6_addr dst;
char tmp[INET6_ADDRSTRLEN];
memcpy(&src, &tuple->src.v6, sizeof(struct in6_addr));
memcpy(&dst, &tuple->dst.v6, sizeof(struct in6_addr));
if (!inet_ntop(AF_INET6, &src, tmp, sizeof(tmp)))
return -1;
ret = snprintf(buf, len, "%s=%s ", src_tag, tmp);
BUFFER_SIZE(ret, size, len, offset);
if (!inet_ntop(AF_INET6, &dst, tmp, sizeof(tmp)))
return -1;
ret = snprintf(buf + offset, len, "%s=%s ", dst_tag, tmp);
BUFFER_SIZE(ret, size, len, offset);
return size;
}
int __snprintf_address(char *buf,
unsigned int len,
const struct __nfct_tuple *tuple,
const char *src_tag,
const char *dst_tag)
{
int size = 0;
switch (tuple->l3protonum) {
case AF_INET:
size = __snprintf_address_ipv4(buf, len, tuple,
src_tag, dst_tag);
break;
case AF_INET6:
size = __snprintf_address_ipv6(buf, len, tuple,
src_tag, dst_tag);
break;
}
return size;
}
int __snprintf_proto(char *buf,
unsigned int len,
const struct __nfct_tuple *tuple)
{
int size = 0;
switch(tuple->protonum) {
case IPPROTO_TCP:
case IPPROTO_UDP:
case IPPROTO_UDPLITE:
case IPPROTO_SCTP:
case IPPROTO_DCCP:
return snprintf(buf, len, "sport=%u dport=%u ",
ntohs(tuple->l4src.tcp.port),
ntohs(tuple->l4dst.tcp.port));
break;
case IPPROTO_GRE:
return snprintf(buf, len, "srckey=0x%x dstkey=0x%x ",
ntohs(tuple->l4src.all),
ntohs(tuple->l4dst.all));
break;
case IPPROTO_ICMP:
case IPPROTO_ICMPV6:
/* The ID only makes sense some ICMP messages but we want to
* display the same output that /proc/net/ip_conntrack does */
return (snprintf(buf, len, "type=%d code=%d id=%d ",
tuple->l4dst.icmp.type,
tuple->l4dst.icmp.code,
ntohs(tuple->l4src.icmp.id)));
break;
}
return size;
}
static int
__snprintf_tuple_zone(char *buf, unsigned int len, const char *pfx,
const struct __nfct_tuple *tuple)
{
return (snprintf(buf, len, "zone-%s=%u ", pfx, tuple->zone));
}
static int __snprintf_status_assured(char *buf,
unsigned int len,
const struct nf_conntrack *ct)
{
int size = 0;
if (ct->status & IPS_HW_OFFLOAD)
size = snprintf(buf, len, "[HW_OFFLOAD] ");
else if (ct->status & IPS_OFFLOAD)
size = snprintf(buf, len, "[OFFLOAD] ");
else if (ct->status & IPS_ASSURED)
size = snprintf(buf, len, "[ASSURED] ");
return size;
}
static int __snprintf_status_not_seen_reply(char *buf,
unsigned int len,
const struct nf_conntrack *ct)
{
int size = 0;
if (!(ct->status & IPS_SEEN_REPLY))
size = snprintf(buf, len, "[UNREPLIED] ");
return size;
}
static int __snprintf_counters(char *buf,
unsigned int len,
const struct nf_conntrack *ct,
int dir)
{
return (snprintf(buf, len, "packets=%llu bytes=%llu ",
(unsigned long long) ct->counters[dir].packets,
(unsigned long long) ct->counters[dir].bytes));
}
static int
__snprintf_mark(char *buf, unsigned int len, const struct nf_conntrack *ct)
{
return (snprintf(buf, len, "mark=%u ", ct->mark));
}
static int
__snprintf_secmark(char *buf, unsigned int len, const struct nf_conntrack *ct)
{
return (snprintf(buf, len, "secmark=%u ", ct->secmark));
}
static int
__snprintf_use(char *buf, unsigned int len, const struct nf_conntrack *ct)
{
return (snprintf(buf, len, "use=%u ", ct->use));
}
static int
__snprintf_id(char *buf, unsigned int len, const struct nf_conntrack *ct)
{
return (snprintf(buf, len, "id=%u ", ct->id));
}
static int
__snprintf_zone(char *buf, unsigned int len, const struct nf_conntrack *ct)
{
return (snprintf(buf, len, "zone=%u ", ct->zone));
}
static int
__snprintf_secctx(char *buf, unsigned int len, const struct nf_conntrack *ct)
{
return (snprintf(buf, len, "secctx=%s ", ct->secctx));
}
static int
__snprintf_timestamp_start(char *buf, unsigned int len,
const struct nf_conntrack *ct)
{
time_t start = (time_t)(ct->timestamp.start / NSEC_PER_SEC);
char *tmp = ctime(&start);
/* overwrite \n in the ctime() output. */
tmp[strlen(tmp)-1] = '\0';
return (snprintf(buf, len, "[start=%s] ", tmp));
}
static int
__snprintf_timestamp_stop(char *buf, unsigned int len,
const struct nf_conntrack *ct)
{
time_t stop = (time_t)(ct->timestamp.stop / NSEC_PER_SEC);
char *tmp = ctime(&stop);
/* overwrite \n in the ctime() output. */
tmp[strlen(tmp)-1] = '\0';
return (snprintf(buf, len, "[stop=%s] ", tmp));
}
static int
__snprintf_timestamp_delta(char *buf, unsigned int len,
const struct nf_conntrack *ct)
{
time_t delta_time, stop;
if (ct->timestamp.stop == 0)
time(&stop);
else
stop = (time_t)(ct->timestamp.stop / NSEC_PER_SEC);
delta_time = stop - (time_t)(ct->timestamp.start / NSEC_PER_SEC);
return (snprintf(buf, len, "delta-time=%llu ",
(unsigned long long)delta_time));
}
static int
__snprintf_helper_name(char *buf, unsigned int len, const struct nf_conntrack *ct)
{
return (snprintf(buf, len, "helper=%s ", ct->helper_name));
}
int
__snprintf_connlabels(char *buf, unsigned int len,
struct nfct_labelmap *map,
const struct nfct_bitmask *b, const char *fmt)
{
unsigned int i, max;
int ret, size = 0, offset = 0;
max = nfct_bitmask_maxbit(b);
for (i = 0; i <= max && len; i++) {
const char *name;
if (!nfct_bitmask_test_bit(b, i))
continue;
name = nfct_labelmap_get_name(map, i);
if (!name || strcmp(name, "") == 0)
continue;
ret = snprintf(buf + offset, len, fmt, name);
BUFFER_SIZE(ret, size, len, offset);
}
return size;
}
static int
__snprintf_clabels(char *buf, unsigned int len,
const struct nf_conntrack *ct, struct nfct_labelmap *map)
{
const struct nfct_bitmask *b = nfct_get_attr(ct, ATTR_CONNLABELS);
int ret, size = 0, offset = 0;
if (!b)
return 0;
ret = snprintf(buf, len, "labels=");
BUFFER_SIZE(ret, size, len, offset);
ret = __snprintf_connlabels(buf + offset, len, map, b, "%s,");
BUFFER_SIZE(ret, size, len, offset);
offset--; /* remove last , */
size--;
ret = snprintf(buf + offset, len, " ");
BUFFER_SIZE(ret, size, len, offset);
return size;
}
int __snprintf_conntrack_default(char *buf,
unsigned int len,
const struct nf_conntrack *ct,
unsigned int msg_type,
unsigned int flags,
struct nfct_labelmap *map)
{
int ret = 0, size = 0, offset = 0;
switch(msg_type) {
case NFCT_T_NEW:
ret = snprintf(buf, len, "%9s ", "[NEW]");
break;
case NFCT_T_UPDATE:
ret = snprintf(buf, len, "%9s ", "[UPDATE]");
break;
case NFCT_T_DESTROY:
ret = snprintf(buf, len, "%9s ", "[DESTROY]");
break;
default:
break;
}
BUFFER_SIZE(ret, size, len, offset);
if (flags & NFCT_OF_SHOW_LAYER3) {
ret = __snprintf_l3protocol(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
ret = __snprintf_protocol(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
if (test_bit(ATTR_TIMEOUT, ct->head.set)) {
ret = __snprintf_timeout(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_TCP_STATE, ct->head.set)) {
ret = __snprintf_protoinfo(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_SCTP_STATE, ct->head.set)) {
ret = __snprintf_protoinfo_sctp(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_DCCP_STATE, ct->head.set)) {
ret = __snprintf_protoinfo_dccp(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
ret = __snprintf_address(buf+offset, len, &ct->head.orig,
"src", "dst");
BUFFER_SIZE(ret, size, len, offset);
ret = __snprintf_proto(buf+offset, len, &ct->head.orig);
BUFFER_SIZE(ret, size, len, offset);
if (test_bit(ATTR_ORIG_ZONE, ct->head.set)) {
ret = __snprintf_tuple_zone(buf+offset, len, "orig", &ct->head.orig);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_ORIG_COUNTER_PACKETS, ct->head.set) &&
test_bit(ATTR_ORIG_COUNTER_BYTES, ct->head.set)) {
ret = __snprintf_counters(buf+offset, len, ct, __DIR_ORIG);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_STATUS, ct->head.set)) {
ret = __snprintf_status_not_seen_reply(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
ret = __snprintf_address(buf+offset, len, &ct->repl,
"src", "dst");
BUFFER_SIZE(ret, size, len, offset);
ret = __snprintf_proto(buf+offset, len, &ct->repl);
BUFFER_SIZE(ret, size, len, offset);
if (test_bit(ATTR_REPL_ZONE, ct->head.set)) {
ret = __snprintf_tuple_zone(buf+offset, len, "reply", &ct->repl);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_REPL_COUNTER_PACKETS, ct->head.set) &&
test_bit(ATTR_REPL_COUNTER_BYTES, ct->head.set)) {
ret = __snprintf_counters(buf+offset, len, ct, __DIR_REPL);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_STATUS, ct->head.set)) {
ret = __snprintf_status_assured(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_MARK, ct->head.set)) {
ret = __snprintf_mark(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_SECMARK, ct->head.set)) {
ret = __snprintf_secmark(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_SECCTX, ct->head.set)) {
ret = __snprintf_secctx(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_ZONE, ct->head.set)) {
ret = __snprintf_zone(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_TIMESTAMP_START, ct->head.set)) {
ret = __snprintf_timestamp_delta(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
if (flags & NFCT_OF_TIMESTAMP) {
if (test_bit(ATTR_TIMESTAMP_START, ct->head.set)) {
ret = __snprintf_timestamp_start(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_TIMESTAMP_STOP, ct->head.set)) {
ret = __snprintf_timestamp_stop(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
}
if (test_bit(ATTR_HELPER_NAME, ct->head.set)) {
ret = __snprintf_helper_name(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
if (test_bit(ATTR_USE, ct->head.set)) {
ret = __snprintf_use(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
if (flags & NFCT_OF_ID && test_bit(ATTR_ID, ct->head.set)) {
ret = __snprintf_id(buf+offset, len, ct);
BUFFER_SIZE(ret, size, len, offset);
}
if (map && test_bit(ATTR_CONNLABELS, ct->head.set)) {
ret = __snprintf_clabels(buf+offset, len, ct, map);
BUFFER_SIZE(ret, size, len, offset);
}
/* Delete the last blank space */
size--;
return size;
}
nfct_get_attr
const void * nfct_get_attr(const struct nf_conntrack *ct, const enum nf_conntrack_attr type)
Definition conntrack/api.c:467
nfct_labelmap_get_name
const char * nfct_labelmap_get_name(struct nfct_labelmap *m, unsigned int bit)
Definition conntrack/api.c:1600
nfct_labelmap
Definition labels.c:17