diff options
Diffstat (limited to 'system/openssh/openssh7.4-dynwindows.patch')
| -rw-r--r-- | system/openssh/openssh7.4-dynwindows.patch | 835 |
1 files changed, 835 insertions, 0 deletions
diff --git a/system/openssh/openssh7.4-dynwindows.patch b/system/openssh/openssh7.4-dynwindows.patch new file mode 100644 index 000000000..45c42159e --- /dev/null +++ b/system/openssh/openssh7.4-dynwindows.patch @@ -0,0 +1,835 @@ +--- a/buffer.h ++++ b/buffer.h +@@ -16,6 +16,9 @@ + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + ++/* move the following to a more appropriate place and name */ ++#define BUFFER_MAX_LEN_HPN 0x4000000 /* 64MB */ ++ + /* Emulation wrappers for legacy OpenSSH buffer API atop sshbuf */ + + #ifndef BUFFER_H +--- a/channels.c ++++ b/channels.c +@@ -191,8 +191,14 @@ + static int connect_next(struct channel_connect *); + static void channel_connect_ctx_free(struct channel_connect *); + ++ ++static int hpn_disabled = 0; ++static int hpn_buffer_size = 2 * 1024 * 1024; ++ + /* -- channel core */ + ++ ++ + Channel * + channel_by_id(int id) + { +@@ -356,6 +362,7 @@ + c->local_window_max = window; + c->local_consumed = 0; + c->local_maxpacket = maxpack; ++ c->dynamic_window = 0; + c->remote_id = -1; + c->remote_name = xstrdup(remote_name); + c->remote_window = 0; +@@ -904,11 +911,35 @@ + FD_SET(c->sock, writeset); + } + ++int channel_tcpwinsz () { ++ u_int32_t tcpwinsz = 0; ++ socklen_t optsz = sizeof(tcpwinsz); ++ int ret = -1; ++ ++ /* if we aren't on a socket return 128KB*/ ++ if(!packet_connection_is_on_socket()) ++ return(128*1024); ++ ret = getsockopt(packet_get_connection_in(), ++ SOL_SOCKET, SO_RCVBUF, &tcpwinsz, &optsz); ++ /* return no more than 64MB */ ++ if ((ret == 0) && tcpwinsz > BUFFER_MAX_LEN_HPN) ++ tcpwinsz = BUFFER_MAX_LEN_HPN; ++ debug2("tcpwinsz: %d for connection: %d", tcpwinsz, ++ packet_get_connection_in()); ++ return(tcpwinsz); ++} ++ + static void + channel_pre_open(Channel *c, fd_set *readset, fd_set *writeset) + { + u_int limit = compat20 ? c->remote_window : packet_get_maxsize(); + ++ /* check buffer limits */ ++ if ((!c->tcpwinsz) || (c->dynamic_window > 0)) ++ c->tcpwinsz = channel_tcpwinsz(); ++ ++ limit = MIN(limit, 2 * c->tcpwinsz); ++ + if (c->istate == CHAN_INPUT_OPEN && + limit > 0 && + buffer_len(&c->input) < limit && +@@ -1926,14 +1957,21 @@ + c->local_maxpacket*3) || + c->local_window < c->local_window_max/2) && + c->local_consumed > 0) { ++ u_int addition = 0; ++ /* adjust max window size if we are in a dynamic environment */ ++ if (c->dynamic_window && (c->tcpwinsz > c->local_window_max)) { ++ /* grow the window somewhat aggressively to maintain pressure */ ++ addition = 1.5*(c->tcpwinsz - c->local_window_max); ++ c->local_window_max += addition; ++ } + packet_start(SSH2_MSG_CHANNEL_WINDOW_ADJUST); + packet_put_int(c->remote_id); +- packet_put_int(c->local_consumed); ++ packet_put_int(c->local_consumed + addition); + packet_send(); + debug2("channel %d: window %d sent adjust %d", + c->self, c->local_window, + c->local_consumed); +- c->local_window += c->local_consumed; ++ c->local_window += c->local_consumed + addition; + c->local_consumed = 0; + } + return 1; +@@ -3179,6 +3217,15 @@ + return addr; + } + ++ ++void ++channel_set_hpn(int external_hpn_disabled, int external_hpn_buffer_size) ++{ ++ hpn_disabled = external_hpn_disabled; ++ hpn_buffer_size = external_hpn_buffer_size; ++ debug("HPN Disabled: %d, HPN Buffer Size: %d", hpn_disabled, hpn_buffer_size); ++} ++ + static int + channel_setup_fwd_listener_tcpip(int type, struct Forward *fwd, + int *allocated_listen_port, struct ForwardOptions *fwd_opts) +@@ -3307,9 +3354,15 @@ + } + + /* Allocate a channel number for the socket. */ ++ /* explicitly test for hpn disabled option. if true use smaller window size */ ++ if (hpn_disabled) + c = channel_new("port listener", type, sock, sock, -1, + CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, + 0, "port listener", 1); ++ else ++ c = channel_new("port listener", type, sock, sock, -1, ++ hpn_buffer_size, CHAN_TCP_PACKET_DEFAULT, ++ 0, "port listener", 1); + c->path = xstrdup(host); + c->host_port = fwd->connect_port; + c->listening_addr = addr == NULL ? NULL : xstrdup(addr); +@@ -4313,10 +4366,17 @@ + *chanids = xcalloc(num_socks + 1, sizeof(**chanids)); + for (n = 0; n < num_socks; n++) { + sock = socks[n]; ++ /* Is this really necassary? */ ++ if (hpn_disabled) + nc = channel_new("x11 listener", + SSH_CHANNEL_X11_LISTENER, sock, sock, -1, + CHAN_X11_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, + 0, "X11 inet listener", 1); ++ else ++ nc = channel_new("x11 listener", ++ SSH_CHANNEL_X11_LISTENER, sock, sock, -1, ++ hpn_buffer_size, CHAN_X11_PACKET_DEFAULT, ++ 0, "X11 inet listener", 1); + nc->single_connection = single_connection; + (*chanids)[n] = nc->self; + } +--- a/channels.h ++++ b/channels.h +@@ -135,8 +135,10 @@ + u_int local_window_max; + u_int local_consumed; + u_int local_maxpacket; ++ int dynamic_window; + int extended_usage; + int single_connection; ++ u_int tcpwinsz; + + char *ctype; /* type */ + +@@ -173,8 +175,10 @@ + /* default window/packet sizes for tcp/x11-fwd-channel */ + #define CHAN_SES_PACKET_DEFAULT (32*1024) + #define CHAN_SES_WINDOW_DEFAULT (64*CHAN_SES_PACKET_DEFAULT) ++ + #define CHAN_TCP_PACKET_DEFAULT (32*1024) + #define CHAN_TCP_WINDOW_DEFAULT (64*CHAN_TCP_PACKET_DEFAULT) ++ + #define CHAN_X11_PACKET_DEFAULT (16*1024) + #define CHAN_X11_WINDOW_DEFAULT (4*CHAN_X11_PACKET_DEFAULT) + +@@ -318,5 +322,8 @@ + void chan_rcvd_ieof(Channel *); + void chan_write_failed(Channel *); + void chan_obuf_empty(Channel *); ++ ++/* hpn handler */ ++void channel_set_hpn(int, int); + + #endif +--- a/clientloop.c ++++ b/clientloop.c +@@ -1990,9 +1990,15 @@ + sock = x11_connect_display(); + if (sock < 0) + return NULL; ++ /* again is this really necessary for X11? */ ++ if (options.hpn_disabled) + c = channel_new("x11", + SSH_CHANNEL_X11_OPEN, sock, sock, -1, + CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1); ++ else ++ c = channel_new("x11", ++ SSH_CHANNEL_X11_OPEN, sock, sock, -1, ++ options.hpn_buffer_size, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1); + c->force_drain = 1; + return c; + } +@@ -2015,10 +2021,16 @@ + __func__, ssh_err(r)); + return NULL; + } ++ if (options.hpn_disabled) + c = channel_new("authentication agent connection", + SSH_CHANNEL_OPEN, sock, sock, -1, +- CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, ++ CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0, + "authentication agent connection", 1); ++ else ++ c = channel_new("authentication agent connection", ++ SSH_CHANNEL_OPEN, sock, sock, -1, ++ options.hpn_buffer_size, options.hpn_buffer_size, 0, ++ "authentication agent connection", 1); + c->force_drain = 1; + return c; + } +@@ -2045,9 +2057,17 @@ + return -1; + } + ++ if(options.hpn_disabled) + c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1, +- CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1); ++ CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, ++ 0, "tun", 1); ++ else ++ c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1, ++ options.hpn_buffer_size, CHAN_TCP_PACKET_DEFAULT, ++ 0, "tun", 1); + c->datagram = 1; ++ ++ + + #if defined(SSH_TUN_FILTER) + if (options.tun_open == SSH_TUNMODE_POINTOPOINT) +--- a/compat.c ++++ b/compat.c +@@ -40,7 +40,7 @@ + + int compat13 = 0; + int compat20 = 0; +-int datafellows = 0; ++unsigned int datafellows = 0; + + void + enable_compat20(void) +@@ -63,7 +63,7 @@ compat_datafellows(const char *version) + int i; + static struct { + char *pat; +- int bugs; ++ unsigned int bugs; + } check[] = { + { "OpenSSH-2.0*," + "OpenSSH-2.1*," +@@ -210,6 +210,12 @@ compat_datafellows(const char *version) + debug("match: %s pat %s compat 0x%08x", + version, check[i].pat, check[i].bugs); + datafellows = check[i].bugs; /* XXX for now */ ++ /* Check to see if the remote side is OpenSSH and not HPN */ ++ if (strstr(version,"OpenSSH") != NULL && ++ strstr(version,"hpn") == NULL) { ++ datafellows |= SSH_BUG_LARGEWINDOW; ++ debug("Remote is NON-HPN aware"); ++ } + return check[i].bugs; + } + } +diff --git a/compat.h b/compat.h +index 2be290a..453c85e 100644 +--- a/compat.h ++++ b/compat.h +@@ -62,6 +62,7 @@ + #define SSH_BUG_CURVE25519PAD 0x10000000 + #define SSH_BUG_HOSTKEYS 0x20000000 + #define SSH_BUG_DHGEX_LARGE 0x40000000 ++#define SSH_BUG_LARGEWINDOW 0x80000000 + + void enable_compat13(void); + void enable_compat20(void); +@@ -73,5 +74,5 @@ char *compat_kex_proposal(char *); + + extern int compat13; + extern int compat20; +-extern int datafellows; ++extern unsigned int datafellows; + #endif +--- a/readconf.c ++++ b/readconf.c +@@ -154,6 +154,7 @@ + oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, + oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, + oPubkeyAuthentication, ++ oTcpRcvBufPoll, oTcpRcvBuf, oHPNDisabled, oHPNBufferSize, + oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, + oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, + oHostKeyAlgorithms, oBindAddress, oPKCS11Provider, +@@ -297,6 +298,11 @@ + { "ignoreunknown", oIgnoreUnknown }, + { "proxyjump", oProxyJump }, + ++ { "tcprcvbufpoll", oTcpRcvBufPoll }, ++ { "tcprcvbuf", oTcpRcvBuf }, ++ { "hpndisabled", oHPNDisabled }, ++ { "hpnbuffersize", oHPNBufferSize }, ++ + { NULL, oBadOption } + }; + +@@ -973,6 +979,18 @@ + intptr = &options->check_host_ip; + goto parse_flag; + ++ case oHPNDisabled: ++ intptr = &options->hpn_disabled; ++ goto parse_flag; ++ ++ case oHPNBufferSize: ++ intptr = &options->hpn_buffer_size; ++ goto parse_int; ++ ++ case oTcpRcvBufPoll: ++ intptr = &options->tcp_rcv_buf_poll; ++ goto parse_flag; ++ + case oVerifyHostKeyDNS: + intptr = &options->verify_host_key_dns; + multistate_ptr = multistate_yesnoask; +@@ -1165,6 +1183,10 @@ + intptr = &options->connection_attempts; + goto parse_int; + ++ case oTcpRcvBuf: ++ intptr = &options->tcp_rcv_buf; ++ goto parse_int; ++ + case oCipher: + intptr = &options->cipher; + arg = strdelim(&s); +@@ -1845,6 +1867,10 @@ + options->ip_qos_interactive = -1; + options->ip_qos_bulk = -1; + options->request_tty = -1; ++ options->hpn_disabled = -1; ++ options->hpn_buffer_size = -1; ++ options->tcp_rcv_buf_poll = -1; ++ options->tcp_rcv_buf = -1; + options->proxy_use_fdpass = -1; + options->ignored_unknown = NULL; + options->num_canonical_domains = 0; +@@ -2008,6 +2034,28 @@ + options->server_alive_interval = 0; + if (options->server_alive_count_max == -1) + options->server_alive_count_max = 3; ++ if (options->hpn_disabled == -1) ++ options->hpn_disabled = 0; ++ if (options->hpn_buffer_size > -1) ++ { ++ /* if a user tries to set the size to 0 set it to 1KB */ ++ if (options->hpn_buffer_size == 0) ++ options->hpn_buffer_size = 1; ++ /*limit the buffer to 64MB*/ ++ if (options->hpn_buffer_size > 64*1024) ++ { ++ options->hpn_buffer_size = 64*1024*1024; ++ debug("User requested buffer larger than 64MB. Request reverted to 64MB"); ++ } ++ else options->hpn_buffer_size *= 1024; ++ debug("hpn_buffer_size set to %d", options->hpn_buffer_size); ++ } ++ if (options->tcp_rcv_buf == 0) ++ options->tcp_rcv_buf = 1; ++ if (options->tcp_rcv_buf > -1) ++ options->tcp_rcv_buf *=1024; ++ if (options->tcp_rcv_buf_poll == -1) ++ options->tcp_rcv_buf_poll = 1; + if (options->control_master == -1) + options->control_master = 0; + if (options->control_persist == -1) { +--- a/readconf.h ++++ b/readconf.h +@@ -57,6 +57,10 @@ typedef struct { + int compression_level; /* Compression level 1 (fast) to 9 + * (best). */ + int tcp_keep_alive; /* Set SO_KEEPALIVE. */ ++ int tcp_rcv_buf; /* user switch to set tcp recv buffer */ ++ int tcp_rcv_buf_poll; /* Option to poll recv buf every window transfer */ ++ int hpn_disabled; /* Switch to disable HPN buffer management */ ++ int hpn_buffer_size; /* User definable size for HPN buffer window */ + int ip_qos_interactive; /* IP ToS/DSCP/class for interactive */ + int ip_qos_bulk; /* IP ToS/DSCP/class for bulk traffic */ + LogLevel log_level; /* Level for logging. */ +--- a/scp.c ++++ b/scp.c +@@ -763,7 +763,7 @@ + off_t i, statbytes; + size_t amt, nr; + int fd = -1, haderr, indx; +- char *last, *name, buf[2048], encname[PATH_MAX]; ++ char *last, *name, buf[16384], encname[PATH_MAX]; + int len; + + for (indx = 0; indx < argc; ++indx) { +@@ -931,7 +931,7 @@ + off_t size, statbytes; + unsigned long long ull; + int setimes, targisdir, wrerrno = 0; +- char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048]; ++ char ch, *cp, *np, *targ, *why, *vect[1], buf[16384], visbuf[16384]; + struct timeval tv[2]; + + #define atime tv[0] +--- a/servconf.c ++++ b/servconf.c +@@ -159,6 +159,9 @@ + options->authorized_principals_file = NULL; + options->authorized_principals_command = NULL; + options->authorized_principals_command_user = NULL; ++ options->tcp_rcv_buf_poll = -1; ++ options->hpn_disabled = -1; ++ options->hpn_buffer_size = -1; + options->ip_qos_interactive = -1; + options->ip_qos_bulk = -1; + options->version_addendum = NULL; +@@ -190,6 +193,7 @@ + void + fill_default_server_options(ServerOptions *options) + { ++ int sock, socksize, socksizelen = sizeof(int); + int i; + + /* Portable-specific options */ +@@ -319,6 +323,41 @@ + } + if (options->permit_tun == -1) + options->permit_tun = SSH_TUNMODE_NO; ++ if (options->hpn_disabled == -1) ++ options->hpn_disabled = 0; ++ ++ if (options->hpn_buffer_size == -1) { ++ /* option not explicitly set. Now we have to figure out */ ++ /* what value to use */ ++ if (options->hpn_disabled == 1) { ++ options->hpn_buffer_size = CHAN_SES_WINDOW_DEFAULT; ++ } else { ++ /* get the current RCV size and set it to that */ ++ /*create a socket but don't connect it */ ++ /* we use that the get the rcv socket size */ ++ sock = socket(AF_INET, SOCK_STREAM, 0); ++ getsockopt(sock, SOL_SOCKET, SO_RCVBUF, ++ &socksize, &socksizelen); ++ close(sock); ++ options->hpn_buffer_size = socksize; ++ debug ("HPN Buffer Size: %d", options->hpn_buffer_size); ++ } ++ } else { ++ /* we have to do this incase the user sets both values in a contradictory */ ++ /* manner. hpn_disabled overrrides hpn_buffer_size*/ ++ if (options->hpn_disabled <= 0) { ++ if (options->hpn_buffer_size == 0) ++ options->hpn_buffer_size = 1; ++ /* limit the maximum buffer to 64MB */ ++ if (options->hpn_buffer_size > 64*1024) { ++ options->hpn_buffer_size = 64*1024*1024; ++ } else { ++ options->hpn_buffer_size *= 1024; ++ } ++ } else ++ options->hpn_buffer_size = CHAN_TCP_WINDOW_DEFAULT; ++ } ++ + if (options->ip_qos_interactive == -1) + options->ip_qos_interactive = IPTOS_LOWDELAY; + if (options->ip_qos_bulk == -1) +@@ -413,6 +452,7 @@ + sHostCertificate, + sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile, + sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser, ++ sTcpRcvBufPoll, sHPNDisabled, sHPNBufferSize, + sKexAlgorithms, sIPQoS, sVersionAddendum, + sAuthorizedKeysCommand, sAuthorizedKeysCommandUser, + sAuthenticationMethods, sHostKeyAgent, sPermitUserRC, +@@ -548,6 +588,9 @@ + { "revokedkeys", sRevokedKeys, SSHCFG_ALL }, + { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL }, + { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL }, ++ { "hpndisabled", sHPNDisabled, SSHCFG_ALL }, ++ { "hpnbuffersize", sHPNBufferSize, SSHCFG_ALL }, ++ { "tcprcvbufpoll", sTcpRcvBufPoll, SSHCFG_ALL }, + { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL }, + { "ipqos", sIPQoS, SSHCFG_ALL }, + { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL }, +@@ -587,6 +630,7 @@ + + for (i = 0; keywords[i].name; i++) + if (strcasecmp(cp, keywords[i].name) == 0) { ++ debug ("Config token is %s", keywords[i].name); + *flags = keywords[i].flags; + return keywords[i].opcode; + } +@@ -1148,6 +1192,19 @@ + if (*activep && *intptr == -1) + *intptr = value; + break; ++ ++ ++ case sTcpRcvBufPoll: ++ intptr = &options->tcp_rcv_buf_poll; ++ goto parse_flag; ++ ++ case sHPNDisabled: ++ intptr = &options->hpn_disabled; ++ goto parse_flag; ++ ++ case sHPNBufferSize: ++ intptr = &options->hpn_buffer_size; ++ goto parse_int; + + case sIgnoreUserKnownHosts: + intptr = &options->ignore_user_known_hosts; +--- a/servconf.h ++++ b/servconf.h +@@ -166,6 +166,9 @@ + char *adm_forced_command; + + int use_pam; /* Enable auth via PAM */ ++ int tcp_rcv_buf_poll; /* poll tcp rcv window in autotuning kernels*/ ++ int hpn_disabled; /* disable hpn functionality. false by default */ ++ int hpn_buffer_size; /* set the hpn buffer size - default 3MB */ + + int permit_tun; + +--- a/serverloop.c ++++ b/serverloop.c +@@ -526,8 +526,12 @@ + sock = tun_open(tun, mode); + if (sock < 0) + goto done; ++ if (options.hpn_disabled) + c = channel_new("tun", SSH_CHANNEL_OPEN, sock, sock, -1, + CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1); ++ else ++ c = channel_new("tun", SSH_CHANNEL_OPEN, sock, sock, -1, ++ options.hpn_buffer_size, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1); + c->datagram = 1; + #if defined(SSH_TUN_FILTER) + if (mode == SSH_TUNMODE_POINTOPOINT) +@@ -563,6 +567,8 @@ + c = channel_new("session", SSH_CHANNEL_LARVAL, + -1, -1, -1, /*window size*/0, CHAN_SES_PACKET_DEFAULT, + 0, "server-session", 1); ++ if ((options.tcp_rcv_buf_poll) && (!options.hpn_disabled)) ++ c->dynamic_window = 1; + if (session_open(the_authctxt, c->self) != 1) { + debug("session open failed, free channel %d", c->self); + channel_free(c); +--- a/session.c ++++ b/session.c +@@ -220,6 +220,7 @@ + goto authsock_err; + + /* Allocate a channel for the authentication agent socket. */ ++ /* this shouldn't matter if its hpn or not - cjr */ + nc = channel_new("auth socket", + SSH_CHANNEL_AUTH_SOCKET, sock, sock, -1, + CHAN_X11_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, +@@ -2121,10 +2122,16 @@ + */ + if (s->chanid == -1) + fatal("no channel for session %d", s->self); ++ if (options.hpn_disabled) + channel_set_fds(s->chanid, + fdout, fdin, fderr, + ignore_fderr ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ, + 1, is_tty, CHAN_SES_WINDOW_DEFAULT); ++ else ++ channel_set_fds(s->chanid, ++ fdout, fdin, fderr, ++ ignore_fderr ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ, ++ 1, is_tty, options.hpn_buffer_size); + } + + /* +--- a/sftp.1 ++++ b/sftp.1 +@@ -266,7 +266,8 @@ + Specify how many requests may be outstanding at any one time. + Increasing this may slightly improve file transfer speed + but will increase memory usage. +-The default is 64 outstanding requests. ++The default is 256 outstanding requests providing for 8MB ++of outstanding data with a 32KB buffer. + .It Fl r + Recursively copy entire directories when uploading and downloading. + Note that +--- a/sftp.c ++++ b/sftp.c +@@ -72,7 +72,7 @@ + #include "sftp-client.h" + + #define DEFAULT_COPY_BUFLEN 32768 /* Size of buffer for up/download */ +-#define DEFAULT_NUM_REQUESTS 64 /* # concurrent outstanding requests */ ++#define DEFAULT_NUM_REQUESTS 256 /* # concurrent outstanding requests */ + + /* File to read commands from */ + FILE* infile; +--- a/ssh.c ++++ b/ssh.c +@@ -1910,6 +1910,9 @@ + { + Channel *c; + int window, packetmax, in, out, err; ++ int sock; ++ int socksize; ++ int socksizelen = sizeof(int); + + if (stdin_null_flag) { + in = open(_PATH_DEVNULL, O_RDONLY); +@@ -1930,9 +1933,74 @@ + if (!isatty(err)) + set_nonblock(err); + +- window = CHAN_SES_WINDOW_DEFAULT; ++ /* we need to check to see if what they want to do about buffer */ ++ /* sizes here. In a hpn to nonhpn connection we want to limit */ ++ /* the window size to something reasonable in case the far side */ ++ /* has the large window bug. In hpn to hpn connection we want to */ ++ /* use the max window size but allow the user to override it */ ++ /* lastly if they disabled hpn then use the ssh std window size */ ++ ++ /* so why don't we just do a getsockopt() here and set the */ ++ /* ssh window to that? In the case of a autotuning receive */ ++ /* window the window would get stuck at the initial buffer */ ++ /* size generally less than 96k. Therefore we need to set the */ ++ /* maximum ssh window size to the maximum hpn buffer size */ ++ /* unless the user has specifically set the tcprcvbufpoll */ ++ /* to no. In which case we *can* just set the window to the */ ++ /* minimum of the hpn buffer size and tcp receive buffer size */ ++ ++ if (tty_flag) ++ options.hpn_buffer_size = CHAN_SES_WINDOW_DEFAULT; ++ else ++ options.hpn_buffer_size = 2*1024*1024; ++ ++ if (datafellows & SSH_BUG_LARGEWINDOW) ++ { ++ debug("HPN to Non-HPN Connection"); ++ } ++ else ++ { ++ if (options.tcp_rcv_buf_poll <= 0) ++ { ++ sock = socket(AF_INET, SOCK_STREAM, 0); ++ getsockopt(sock, SOL_SOCKET, SO_RCVBUF, ++ &socksize, &socksizelen); ++ close(sock); ++ debug("socksize %d", socksize); ++ options.hpn_buffer_size = socksize; ++ debug ("HPNBufferSize set to TCP RWIN: %d", options.hpn_buffer_size); ++ } ++ else ++ { ++ if (options.tcp_rcv_buf > 0) ++ { ++ /*create a socket but don't connect it */ ++ /* we use that the get the rcv socket size */ ++ sock = socket(AF_INET, SOCK_STREAM, 0); ++ /* if they are using the tcp_rcv_buf option */ ++ /* attempt to set the buffer size to that */ ++ if (options.tcp_rcv_buf) ++ setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (void *)&options.tcp_rcv_buf, ++ sizeof(options.tcp_rcv_buf)); ++ getsockopt(sock, SOL_SOCKET, SO_RCVBUF, ++ &socksize, &socksizelen); ++ close(sock); ++ debug("socksize %d", socksize); ++ options.hpn_buffer_size = socksize; ++ debug ("HPNBufferSize set to user TCPRcvBuf: %d", options.hpn_buffer_size); ++ } ++ } ++ } ++ ++ debug("Final hpn_buffer_size = %d", options.hpn_buffer_size); ++ ++ window = options.hpn_buffer_size; ++ ++ channel_set_hpn(options.hpn_disabled, options.hpn_buffer_size); ++ + packetmax = CHAN_SES_PACKET_DEFAULT; + if (tty_flag) { ++ window = 4*CHAN_SES_PACKET_DEFAULT; + window >>= 1; + packetmax >>= 1; + } +@@ -1941,6 +2009,10 @@ + window, packetmax, CHAN_EXTENDED_WRITE, + "client-session", /*nonblock*/0); + ++ if ((options.tcp_rcv_buf_poll > 0) && (!options.hpn_disabled)) { ++ c->dynamic_window = 1; ++ debug ("Enabled Dynamic Window Scaling"); ++ } + debug3("ssh_session2_open: channel_new: %d", c->self); + + channel_send_open(c->self); +--- a/sshconnect.c ++++ b/sshconnect.c +@@ -267,6 +267,31 @@ + } + + /* ++ * Set TCP receive buffer if requested. ++ * Note: tuning needs to happen after the socket is ++ * created but before the connection happens ++ * so winscale is negotiated properly -cjr ++ */ ++static void ++ssh_set_socket_recvbuf(int sock) ++{ ++ void *buf = (void *)&options.tcp_rcv_buf; ++ int sz = sizeof(options.tcp_rcv_buf); ++ int socksize; ++ int socksizelen = sizeof(int); ++ ++ debug("setsockopt Attempting to set SO_RCVBUF to %d", options.tcp_rcv_buf); ++ if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, buf, sz) >= 0) { ++ getsockopt(sock, SOL_SOCKET, SO_RCVBUF, &socksize, &socksizelen); ++ debug("setsockopt SO_RCVBUF: %.100s %d", strerror(errno), socksize); ++ } ++ else ++ error("Couldn't set socket receive buffer to %d: %.100s", ++ options.tcp_rcv_buf, strerror(errno)); ++} ++ ++ ++/* + * Creates a (possibly privileged) socket for use as the ssh connection. + */ + static int +@@ -282,6 +307,9 @@ + } + fcntl(sock, F_SETFD, FD_CLOEXEC); + ++ if (options.tcp_rcv_buf > 0) ++ ssh_set_socket_recvbuf(sock); ++ + /* Bind the socket to an alternative local IP address */ + if (options.bind_address == NULL && !privileged) + return sock; +@@ -526,10 +554,10 @@ + /* Send our own protocol version identification. */ + if (compat20) { + xasprintf(&client_version_string, "SSH-%d.%d-%.100s\r\n", +- PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_VERSION); ++ PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_RELEASE); + } else { + xasprintf(&client_version_string, "SSH-%d.%d-%.100s\n", +- PROTOCOL_MAJOR_1, minor1, SSH_VERSION); ++ PROTOCOL_MAJOR_1, minor1, SSH_RELEASE); + } + if (atomicio(vwrite, connection_out, client_version_string, + strlen(client_version_string)) != strlen(client_version_string)) +--- a/sshd.c ++++ b/sshd.c +@@ -1020,6 +1020,8 @@ + int ret, listen_sock, on = 1; + struct addrinfo *ai; + char ntop[NI_MAXHOST], strport[NI_MAXSERV]; ++ int socksize; ++ int socksizelen = sizeof(int); + + for (ai = options.listen_addrs; ai; ai = ai->ai_next) { + if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6) +@@ -1060,6 +1062,11 @@ + + debug("Bind to port %s on %s.", strport, ntop); + ++ getsockopt(listen_sock, SOL_SOCKET, SO_RCVBUF, ++ &socksize, &socksizelen); ++ debug("Server TCP RWIN socket size: %d", socksize); ++ debug("HPN Buffer Size: %d", options.hpn_buffer_size); ++ + /* Bind the socket to the desired port. */ + if (bind(listen_sock, ai->ai_addr, ai->ai_addrlen) < 0) { + error("Bind to port %s on %s failed: %.200s.", +@@ -1977,6 +1984,9 @@ + verbose("Connection from %s port %d on %s port %d", + remote_ip, remote_port, laddr, ssh_local_port(ssh)); + free(laddr); ++ ++ /* set the HPN options for the child */ ++ channel_set_hpn(options.hpn_disabled, options.hpn_buffer_size); + + /* + * We don't want to listen forever unless the other side +--- a/sshd_config ++++ b/sshd_config +@@ -99,7 +99,7 @@ + #ClientAliveInterval 0 + #ClientAliveCountMax 3 + #UseDNS no +-#PidFile /var/run/sshd.pid ++#PidFile /run/sshd.pid + #MaxStartups 10:30:100 + #PermitTunnel no + #ChrootDirectory none +@@ -109,7 +109,18 @@ + #Banner none + + # override default of no subsystems +-Subsystem sftp /usr/libexec/sftp-server ++Subsystem sftp /usr/lib/ssh/sftp-server ++ ++# the following are HPN related configuration options ++# tcp receive buffer polling. disable in non autotuning kernels ++#TcpRcvBufPoll yes ++ ++# disable hpn performance boosts ++#HPNDisabled no ++ ++# buffer size for hpn to non-hpn connections ++#HPNBufferSize 2048 ++ + + # Example of overriding settings on a per-user basis + #Match User anoncvs +--- a/version.h ++++ b/version.h +@@ -3,4 +3,5 @@ + #define SSH_VERSION "OpenSSH_7.4" + + #define SSH_PORTABLE "p1" +-#define SSH_RELEASE SSH_VERSION SSH_PORTABLE ++#define SSH_HPN "-hpn14v4" ++#define SSH_RELEASE SSH_VERSION SSH_PORTABLE SSH_HPN |