779994fa36
The nf_log_set is an interface function, so it should do the strict sanity check of parameters. Convert the return value of nf_log_set as int instead of void. When the pf is invalid, return -EOPNOTSUPP. Signed-off-by: Gao Feng <fgao@ikuai8.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
119 lines
3.4 KiB
C
119 lines
3.4 KiB
C
#ifndef _NF_LOG_H
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#define _NF_LOG_H
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#include <linux/netfilter.h>
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/* those NF_LOG_* defines and struct nf_loginfo are legacy definitios that will
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* disappear once iptables is replaced with pkttables. Please DO NOT use them
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* for any new code! */
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#define NF_LOG_TCPSEQ 0x01 /* Log TCP sequence numbers */
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#define NF_LOG_TCPOPT 0x02 /* Log TCP options */
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#define NF_LOG_IPOPT 0x04 /* Log IP options */
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#define NF_LOG_UID 0x08 /* Log UID owning local socket */
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#define NF_LOG_MASK 0x0f
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/* This flag indicates that copy_len field in nf_loginfo is set */
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#define NF_LOG_F_COPY_LEN 0x1
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enum nf_log_type {
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NF_LOG_TYPE_LOG = 0,
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NF_LOG_TYPE_ULOG,
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NF_LOG_TYPE_MAX
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};
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struct nf_loginfo {
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u_int8_t type;
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union {
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struct {
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/* copy_len will be used iff you set
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* NF_LOG_F_COPY_LEN in flags
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*/
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u_int32_t copy_len;
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u_int16_t group;
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u_int16_t qthreshold;
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u_int16_t flags;
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} ulog;
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struct {
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u_int8_t level;
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u_int8_t logflags;
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} log;
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} u;
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};
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typedef void nf_logfn(struct net *net,
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u_int8_t pf,
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unsigned int hooknum,
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const struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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const struct nf_loginfo *li,
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const char *prefix);
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struct nf_logger {
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char *name;
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enum nf_log_type type;
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nf_logfn *logfn;
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struct module *me;
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};
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/* Function to register/unregister log function. */
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int nf_log_register(u_int8_t pf, struct nf_logger *logger);
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void nf_log_unregister(struct nf_logger *logger);
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int nf_log_set(struct net *net, u_int8_t pf, const struct nf_logger *logger);
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void nf_log_unset(struct net *net, const struct nf_logger *logger);
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int nf_log_bind_pf(struct net *net, u_int8_t pf,
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const struct nf_logger *logger);
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void nf_log_unbind_pf(struct net *net, u_int8_t pf);
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int nf_logger_find_get(int pf, enum nf_log_type type);
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void nf_logger_put(int pf, enum nf_log_type type);
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void nf_logger_request_module(int pf, enum nf_log_type type);
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#define MODULE_ALIAS_NF_LOGGER(family, type) \
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MODULE_ALIAS("nf-logger-" __stringify(family) "-" __stringify(type))
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/* Calls the registered backend logging function */
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__printf(8, 9)
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void nf_log_packet(struct net *net,
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u_int8_t pf,
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unsigned int hooknum,
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const struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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const struct nf_loginfo *li,
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const char *fmt, ...);
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__printf(8, 9)
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void nf_log_trace(struct net *net,
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u_int8_t pf,
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unsigned int hooknum,
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const struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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const struct nf_loginfo *li,
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const char *fmt, ...);
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struct nf_log_buf;
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struct nf_log_buf *nf_log_buf_open(void);
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__printf(2, 3) int nf_log_buf_add(struct nf_log_buf *m, const char *f, ...);
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void nf_log_buf_close(struct nf_log_buf *m);
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/* common logging functions */
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int nf_log_dump_udp_header(struct nf_log_buf *m, const struct sk_buff *skb,
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u8 proto, int fragment, unsigned int offset);
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int nf_log_dump_tcp_header(struct nf_log_buf *m, const struct sk_buff *skb,
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u8 proto, int fragment, unsigned int offset,
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unsigned int logflags);
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void nf_log_dump_sk_uid_gid(struct nf_log_buf *m, struct sock *sk);
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void nf_log_dump_packet_common(struct nf_log_buf *m, u_int8_t pf,
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unsigned int hooknum, const struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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const struct nf_loginfo *loginfo,
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const char *prefix);
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#endif /* _NF_LOG_H */
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