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[TCP]: MD5 Signature Option (RFC2385) support.

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Based on implementation by Rick Payne.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki
2006-11-14 19:07:45 -08:00
committed by David S. Miller
parent bf6bce71ea
commit cfb6eeb4c8
15 changed files with 1714 additions and 64 deletions
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35
include/linux/tcp.h
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@ -19,6 +19,7 @@
#include <linux/types.h>
#include <asm/byteorder.h>
#include <linux/socket.h>
struct tcphdr {
__be16 source;
@ -94,6 +95,7 @@ enum {
#define TCP_INFO 11 /* Information about this connection. */
#define TCP_QUICKACK 12 /* Block/reenable quick acks */
#define TCP_CONGESTION 13 /* Congestion control algorithm */
#define TCP_MD5SIG 14 /* TCP MD5 Signature (RFC2385) */
#define TCPI_OPT_TIMESTAMPS 1
#define TCPI_OPT_SACK 2
@ -157,6 +159,17 @@ struct tcp_info
__u32 tcpi_total_retrans;
};
/* for TCP_MD5SIG socket option */
#define TCP_MD5SIG_MAXKEYLEN 80
struct tcp_md5sig {
struct __kernel_sockaddr_storage tcpm_addr; /* address associated */
__u16 __tcpm_pad1; /* zero */
__u16 tcpm_keylen; /* key length */
__u32 __tcpm_pad2; /* zero */
__u8 tcpm_key[TCP_MD5SIG_MAXKEYLEN]; /* key (binary) */
};
#ifdef __KERNEL__
#include <linux/skbuff.h>
@ -197,9 +210,13 @@ struct tcp_options_received {
};
struct tcp_request_sock {
struct inet_request_sock req;
__u32 rcv_isn;
__u32 snt_isn;
struct inet_request_sock req;
#ifdef CONFIG_TCP_MD5SIG
/* Only used by TCP MD5 Signature so far. */
struct tcp_request_sock_ops *af_specific;
#endif
__u32 rcv_isn;
__u32 snt_isn;
};
static inline struct tcp_request_sock *tcp_rsk(const struct request_sock *req)
@ -363,6 +380,14 @@ struct tcp_sock {
__u32 probe_seq_start;
__u32 probe_seq_end;
} mtu_probe;
#ifdef CONFIG_TCP_MD5SIG
/* TCP AF-Specific parts; only used by MD5 Signature support so far */
struct tcp_sock_af_ops *af_specific;
/* TCP MD5 Signagure Option information */
struct tcp_md5sig_info *md5sig_info;
#endif
};
static inline struct tcp_sock *tcp_sk(const struct sock *sk)
@ -377,6 +402,10 @@ struct tcp_timewait_sock {
__u32 tw_rcv_wnd;
__u32 tw_ts_recent;
long tw_ts_recent_stamp;
#ifdef CONFIG_TCP_MD5SIG
__u16 tw_md5_keylen;
__u8 tw_md5_key[TCP_MD5SIG_MAXKEYLEN];
#endif
};
static inline struct tcp_timewait_sock *tcp_twsk(const struct sock *sk)