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Add support for TCP timestamps

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This commit is contained in:
Michael Brown
2007-07-13 11:32:53 +01:00
parent eb530845d4
commit 096fa94f0c
2 changed files with 115 additions and 6 deletions
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47
src/include/gpxe/tcp.h
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@@ -27,18 +27,59 @@ struct tcp_header {
uint16_t urg; /* Urgent pointer */
};
/**
* TCP MSS option
/** @defgroup tcpopts TCP options
* @{
*/
/** End of TCP options list */
#define TCP_OPTION_END 0
/** TCP option pad */
#define TCP_OPTION_NOP 1
/** Generic TCP option */
struct tcp_option {
uint8_t kind;
uint8_t length;
} __attribute__ (( packed ));
/** TCP MSS option */
struct tcp_mss_option {
uint8_t kind;
uint8_t length;
uint16_t mss;
};
} __attribute__ (( packed ));
/** Code for the TCP MSS option */
#define TCP_OPTION_MSS 2
/** TCP timestamp option */
struct tcp_timestamp_option {
uint8_t kind;
uint8_t length;
uint32_t tsval;
uint32_t tsecr;
} __attribute__ (( packed ));
/** Padded TCP timestamp option (used for sending) */
struct tcp_timestamp_padded_option {
uint8_t nop[2];
struct tcp_timestamp_option tsopt;
} __attribute__ (( packed ));
/** Code for the TCP timestamp option */
#define TCP_OPTION_TS 8
/** Parsed TCP options */
struct tcp_options {
/** MSS option, if present */
const struct tcp_mss_option *mssopt;
/** Timestampe option, if present */
const struct tcp_timestamp_option *tsopt;
};
/** @} */
/*
* TCP flags
*/