From b4d6660d85b244191d2e507e9bdaba14ed9cca12 Mon Sep 17 00:00:00 2001 From: pkelsey Date: Mon, 26 Feb 2018 02:53:22 +0000 Subject: [PATCH] This is an implementation of the client side of TCP Fast Open (TFO) [RFC7413]. It also includes a pre-shared key mode of operation in which the server requires the client to be in possession of a shared secret in order to successfully open TFO connections with that server. The names of some existing fastopen sysctls have changed (e.g., net.inet.tcp.fastopen.enabled -> net.inet.tcp.fastopen.server_enable). Reviewed by: tuexen MFC after: 1 month Sponsored by: Limelight Networks Differential Revision: https://reviews.freebsd.org/D14047 --- newlib/libc/sys/rtems/include/netinet/tcp.h | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/newlib/libc/sys/rtems/include/netinet/tcp.h b/newlib/libc/sys/rtems/include/netinet/tcp.h index 7eb4e9afd..4c1c9d430 100644 --- a/newlib/libc/sys/rtems/include/netinet/tcp.h +++ b/newlib/libc/sys/rtems/include/netinet/tcp.h @@ -101,8 +101,6 @@ struct tcphdr { #define TCPOLEN_SIGNATURE 18 #define TCPOPT_FAST_OPEN 34 #define TCPOLEN_FAST_OPEN_EMPTY 2 -#define TCPOLEN_FAST_OPEN_MIN 6 -#define TCPOLEN_FAST_OPEN_MAX 18 /* Miscellaneous constants */ #define MAX_SACK_BLKS 6 /* Max # SACK blocks stored at receiver side */ @@ -152,6 +150,10 @@ struct tcphdr { #define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */ #define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr)) /* max space left for options */ + +#define TCP_FASTOPEN_MIN_COOKIE_LEN 4 /* Per RFC7413 */ +#define TCP_FASTOPEN_MAX_COOKIE_LEN 16 /* Per RFC7413 */ +#define TCP_FASTOPEN_PSK_LEN 16 /* Same as TCP_FASTOPEN_KEY_LEN */ #endif /* __BSD_VISIBLE */ /* @@ -252,6 +254,16 @@ struct tcp_info { /* Padding to grow without breaking ABI. */ u_int32_t __tcpi_pad[26]; /* Padding. */ }; + +/* + * If this structure is provided when setting the TCP_FASTOPEN socket + * option, and the enable member is non-zero, a subsequent connect will use + * pre-shared key (PSK) mode using the provided key. + */ +struct tcp_fastopen { + int enable; + uint8_t psk[TCP_FASTOPEN_PSK_LEN]; +}; #endif #define TCP_FUNCTION_NAME_LEN_MAX 32