diff options
author | glebius <glebius@FreeBSD.org> | 2006-12-29 09:54:32 +0000 |
---|---|---|
committer | glebius <glebius@FreeBSD.org> | 2006-12-29 09:54:32 +0000 |
commit | 978ae6c93cfee949fa4ff6176229d8e28d9eba82 (patch) | |
tree | e3b649443118a4d6d3aa0ab4c7a06c1a60b37eb6 /sys | |
parent | 40e282c02e27900fecfe20201841e86998ce5f36 (diff) | |
download | FreeBSD-src-978ae6c93cfee949fa4ff6176229d8e28d9eba82.zip FreeBSD-src-978ae6c93cfee949fa4ff6176229d8e28d9eba82.tar.gz |
A node that implements Predictor-1 compression for PPP.
Submitted by: Alexander Motin <mav alkar.net>
Diffstat (limited to 'sys')
-rw-r--r-- | sys/netgraph/ng_pred1.c | 698 | ||||
-rw-r--r-- | sys/netgraph/ng_pred1.h | 83 |
2 files changed, 781 insertions, 0 deletions
diff --git a/sys/netgraph/ng_pred1.c b/sys/netgraph/ng_pred1.c new file mode 100644 index 0000000..28dff36 --- /dev/null +++ b/sys/netgraph/ng_pred1.c @@ -0,0 +1,698 @@ +/*- + * Copyright (c) 2006 Alexander Motin <mav@alkar.net> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice unmodified, this list of conditions, and the following + * disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +/* + * Predictor-1 PPP compression netgraph node type. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/mbuf.h> +#include <sys/malloc.h> +#include <sys/errno.h> +#include <sys/syslog.h> + +#include <netgraph/ng_message.h> +#include <netgraph/netgraph.h> +#include <netgraph/ng_parse.h> +#include <netgraph/ng_pred1.h> + +#include "opt_netgraph.h" + +MALLOC_DEFINE(M_NETGRAPH_PRED1, "netgraph_pred1", "netgraph pred1 node "); + +/* PRED1 header length */ +#define PRED1_HDRLEN 2 + +#define PRED1_TABLE_SIZE 0x10000 +#define PRED1_BUF_SIZE 4096 +#define PPP_INITFCS 0xffff /* Initial FCS value */ +#define PPP_GOODFCS 0xf0b8 /* Good final FCS value */ + +/* + * The following hash code is the heart of the algorithm: + * it builds a sliding hash sum of the previous 3-and-a-bit + * characters which will be used to index the guess table. + * A better hash function would result in additional compression, + * at the expense of time. + */ + +#define HASH(x) priv->Hash = (priv->Hash << 4) ^ (x) + +/* Node private data */ +struct ng_pred1_private { + struct ng_pred1_config cfg; /* configuration */ + u_char GuessTable[PRED1_TABLE_SIZE]; /* dictionary */ + u_char inbuf[PRED1_BUF_SIZE]; /* input buffer */ + u_char outbuf[PRED1_BUF_SIZE]; /* output buffer */ + struct ng_pred1_stats stats; /* statistics */ + uint16_t Hash; + ng_ID_t ctrlnode; /* path to controlling node */ + uint16_t seqnum; /* sequence number */ + u_char compress; /* compress/decompress flag */ +}; +typedef struct ng_pred1_private *priv_p; + +/* Netgraph node methods */ +static ng_constructor_t ng_pred1_constructor; +static ng_rcvmsg_t ng_pred1_rcvmsg; +static ng_shutdown_t ng_pred1_shutdown; +static ng_newhook_t ng_pred1_newhook; +static ng_rcvdata_t ng_pred1_rcvdata; +static ng_disconnect_t ng_pred1_disconnect; + +/* Helper functions */ +static int ng_pred1_compress(node_p node, struct mbuf *m, + struct mbuf **resultp); +static int ng_pred1_decompress(node_p node, struct mbuf *m, + struct mbuf **resultp); +static void Pred1Init(node_p node); +static int Pred1Compress(node_p node, u_char *source, u_char *dest, + int len); +static int Pred1Decompress(node_p node, u_char *source, u_char *dest, + int slen, int dlen); +static void Pred1SyncTable(node_p node, u_char *source, int len); +static uint16_t Crc16(uint16_t fcs, u_char *cp, int len); + +static const uint16_t Crc16Table[]; + +/* Parse type for struct ng_pred1_config. */ +static const struct ng_parse_struct_field ng_pred1_config_type_fields[] + = NG_PRED1_CONFIG_INFO; +static const struct ng_parse_type ng_pred1_config_type = { + &ng_parse_struct_type, + ng_pred1_config_type_fields +}; + +/* Parse type for struct ng_pred1_stat. */ +static const struct ng_parse_struct_field ng_pred1_stats_type_fields[] + = NG_PRED1_STATS_INFO; +static const struct ng_parse_type ng_pred1_stat_type = { + &ng_parse_struct_type, + ng_pred1_stats_type_fields +}; + +/* List of commands and how to convert arguments to/from ASCII. */ +static const struct ng_cmdlist ng_pred1_cmds[] = { + { + NGM_PRED1_COOKIE, + NGM_PRED1_CONFIG, + "config", + &ng_pred1_config_type, + NULL + }, + { + NGM_PRED1_COOKIE, + NGM_PRED1_RESETREQ, + "resetreq", + NULL, + NULL + }, + { + NGM_PRED1_COOKIE, + NGM_PRED1_GET_STATS, + "getstats", + NULL, + &ng_pred1_stat_type + }, + { + NGM_PRED1_COOKIE, + NGM_PRED1_CLR_STATS, + "clrstats", + NULL, + NULL + }, + { + NGM_PRED1_COOKIE, + NGM_PRED1_GETCLR_STATS, + "getclrstats", + NULL, + &ng_pred1_stat_type + }, + { 0 } +}; + +/* Node type descriptor */ +static struct ng_type ng_pred1_typestruct = { + .version = NG_ABI_VERSION, + .name = NG_PRED1_NODE_TYPE, + .constructor = ng_pred1_constructor, + .rcvmsg = ng_pred1_rcvmsg, + .shutdown = ng_pred1_shutdown, + .newhook = ng_pred1_newhook, + .rcvdata = ng_pred1_rcvdata, + .disconnect = ng_pred1_disconnect, + .cmdlist = ng_pred1_cmds, +}; +NETGRAPH_INIT(pred1, &ng_pred1_typestruct); + +#define ERROUT(x) do { error = (x); goto done; } while (0) + +/************************************************************************ + NETGRAPH NODE STUFF + ************************************************************************/ + +/* + * Node type constructor + */ +static int +ng_pred1_constructor(node_p node) +{ + priv_p priv; + + /* Allocate private structure. */ + priv = malloc(sizeof(*priv), M_NETGRAPH_PRED1, M_WAITOK | M_ZERO); + + NG_NODE_SET_PRIVATE(node, priv); + + /* This node is not thread safe. */ + NG_NODE_FORCE_WRITER(node); + + /* Done */ + return (0); +} + +/* + * Give our OK for a hook to be added. + */ +static int +ng_pred1_newhook(node_p node, hook_p hook, const char *name) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + + if (NG_NODE_NUMHOOKS(node) > 0) + return (EINVAL); + + if (strcmp(name, NG_PRED1_HOOK_COMP) == 0) + priv->compress = 1; + else if (strcmp(name, NG_PRED1_HOOK_DECOMP) == 0) + priv->compress = 0; + else + return (EINVAL); + + return (0); +} + +/* + * Receive a control message. + */ +static int +ng_pred1_rcvmsg(node_p node, item_p item, hook_p lasthook) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + struct ng_mesg *resp = NULL; + int error = 0; + struct ng_mesg *msg; + + NGI_GET_MSG(item, msg); + + if (msg->header.typecookie != NGM_PRED1_COOKIE) + ERROUT(EINVAL); + + switch (msg->header.cmd) { + case NGM_PRED1_CONFIG: + { + struct ng_pred1_config *const cfg = + (struct ng_pred1_config *)msg->data; + + /* Check configuration. */ + if (msg->header.arglen != sizeof(*cfg)) + ERROUT(EINVAL); + + /* Configuration is OK, reset to it. */ + priv->cfg = *cfg; + + /* Save return address so we can send reset-req's. */ + priv->ctrlnode = NGI_RETADDR(item); + + /* Clear our state. */ + Pred1Init(node); + + break; + } + case NGM_PRED1_RESETREQ: + Pred1Init(node); + break; + + case NGM_PRED1_GET_STATS: + case NGM_PRED1_CLR_STATS: + case NGM_PRED1_GETCLR_STATS: + { + /* Create response. */ + if (msg->header.cmd != NGM_PRED1_CLR_STATS) { + NG_MKRESPONSE(resp, msg, + sizeof(struct ng_pred1_stats), M_NOWAIT); + if (resp == NULL) + ERROUT(ENOMEM); + bcopy(&priv->stats, resp->data, + sizeof(struct ng_pred1_stats)); + } + + if (msg->header.cmd != NGM_PRED1_GET_STATS) + bzero(&priv->stats, sizeof(struct ng_pred1_stats)); + break; + } + + default: + error = EINVAL; + break; + } +done: + NG_RESPOND_MSG(error, node, item, resp); + NG_FREE_MSG(msg); + return (error); +} + +/* + * Receive incoming data on our hook. + */ +static int +ng_pred1_rcvdata(hook_p hook, item_p item) +{ + const node_p node = NG_HOOK_NODE(hook); + const priv_p priv = NG_NODE_PRIVATE(node); + struct mbuf *m, *out; + int error; + + if (!priv->cfg.enable) { + NG_FREE_ITEM(item); + return (ENXIO); + } + + NGI_GET_M(item, m); + /* Compress. */ + if (priv->compress) { + if ((error = ng_pred1_compress(node, m, &out)) != 0) { + NG_FREE_ITEM(item); + log(LOG_NOTICE, "%s: error: %d\n", __func__, error); + return (error); + } + + } else { /* Decompress. */ + if ((error = ng_pred1_decompress(node, m, &out)) != 0) { + NG_FREE_ITEM(item); + log(LOG_NOTICE, "%s: error: %d\n", __func__, error); + if (priv->ctrlnode != 0) { + struct ng_mesg *msg; + + /* Need to send a reset-request. */ + NG_MKMESSAGE(msg, NGM_PRED1_COOKIE, + NGM_PRED1_RESETREQ, 0, M_NOWAIT); + if (msg == NULL) + return (error); + NG_SEND_MSG_ID(error, node, msg, + priv->ctrlnode, 0); + } + return (error); + } + } + + NG_FWD_NEW_DATA(error, item, hook, out); + return (error); +} + +/* + * Destroy node. + */ +static int +ng_pred1_shutdown(node_p node) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + + free(priv, M_NETGRAPH_PRED1); + NG_NODE_SET_PRIVATE(node, NULL); + NG_NODE_UNREF(node); /* Let the node escape. */ + return (0); +} + +/* + * Hook disconnection + */ +static int +ng_pred1_disconnect(hook_p hook) +{ + const node_p node = NG_HOOK_NODE(hook); + + Pred1Init(node); + + /* Go away if no longer connected. */ + if ((NG_NODE_NUMHOOKS(node) == 0) && NG_NODE_IS_VALID(node)) + ng_rmnode_self(node); + return (0); +} + +/************************************************************************ + HELPER STUFF + ************************************************************************/ + +/* + * Compress/encrypt a packet and put the result in a new mbuf at *resultp. + * The original mbuf is not free'd. + */ +static int +ng_pred1_compress(node_p node, struct mbuf *m, struct mbuf **resultp) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + int outlen, inlen; + u_char *out; + uint16_t fcs, lenn; + int len; + + /* Initialize. */ + *resultp = NULL; + + inlen = m->m_pkthdr.len; + + priv->stats.FramesPlain++; + priv->stats.InOctets += inlen; + + /* Reserve space for expansion. */ + if (inlen > (PRED1_BUF_SIZE*8/9 + 1 + 4)) { + priv->stats.Errors++; + NG_FREE_M(m); + return (ENOMEM); + } + + /* Work with contiguous regions of memory. */ + m_copydata(m, 0, inlen, (caddr_t)(priv->inbuf + 2)); + + NG_FREE_M(m); + + lenn = htons(inlen & 0x7FFF); + + /* Compute FCS. */ + fcs = Crc16(PPP_INITFCS, (u_char *)&lenn, 2); + fcs = Crc16(fcs, priv->inbuf + 2, inlen); + fcs = ~fcs; + + /* Compress data. */ + len = Pred1Compress(node, priv->inbuf + 2, priv->outbuf + 2, inlen); + + /* What happened? */ + if (len < inlen) { + out = priv->outbuf; + outlen = 2 + len; + *(uint16_t *)out = lenn; + *out |= 0x80; + priv->stats.FramesComp++; + } else { + out = priv->inbuf; + outlen = 2 + inlen; + *(uint16_t *)out = lenn; + priv->stats.FramesUncomp++; + } + + /* Add FCS. */ + (out + outlen)[0] = fcs & 0xFF; + (out + outlen)[1] = fcs >> 8; + + /* Calculate resulting size. */ + outlen += 2; + + /* Return packet in an mbuf. */ + *resultp = m_devget((caddr_t)out, outlen, 0, NULL, NULL); + if (*resultp == NULL) { + priv->stats.Errors++; + return (ENOMEM); + }; + + priv->stats.OutOctets += outlen; + + return (0); +} + +/* + * Decompress/decrypt packet and put the result in a new mbuf at *resultp. + * The original mbuf is not free'd. + */ +static int +ng_pred1_decompress(node_p node, struct mbuf *m, struct mbuf **resultp) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + int inlen; + uint16_t len, len1, cf, lenn; + uint16_t fcs; + + /* Initialize. */ + *resultp = NULL; + + inlen = m->m_pkthdr.len; + + if (inlen > PRED1_BUF_SIZE) { + priv->stats.Errors++; + NG_FREE_M(m); + return (ENOMEM); + } + + /* Work with contiguous regions of memory. */ + m_copydata(m, 0, inlen, (caddr_t)priv->inbuf); + + priv->stats.InOctets += inlen; + + /* Get initial length value. */ + len = priv->inbuf[0] << 8; + len += priv->inbuf[1]; + + cf = (len & 0x8000); + len &= 0x7fff; + + /* Is data compressed or not really? */ + if (cf) { + NG_FREE_M(m); + + priv->stats.FramesComp++; + len1 = Pred1Decompress(node, priv->inbuf + 2, priv->outbuf, + inlen - 4, PRED1_BUF_SIZE); + if (len != len1) { + /* Error is detected. Send reset request */ + priv->stats.Errors++; + log(LOG_NOTICE, "ng_pred1: Comp length error (%d) " + "--> len (%d)\n", len, len1); + return (EIO); + } + + /* + * CRC check on receive is defined in RFC. It is surely required + * for compressed frames to signal dictionary corruption, + * but it is actually useless for uncompressed frames because + * the same check has already done by HDLC and/or other layer. + */ + lenn = htons(len); + fcs = Crc16(PPP_INITFCS, (u_char *)&lenn, 2); + fcs = Crc16(fcs, priv->outbuf, len); + fcs = Crc16(fcs, priv->inbuf + inlen - 2, 2); + + if (fcs != PPP_GOODFCS) { + priv->stats.Errors++; + log(LOG_NOTICE, "ng_pred1: Pred1: Bad CRC-16\n"); + return (EIO); + } + + /* Return packet in an mbuf. */ + *resultp = m_devget((caddr_t)priv->outbuf, len, 0, NULL, NULL); + if (*resultp == NULL) { + priv->stats.Errors++; + return (ENOMEM); + }; + + } else { + priv->stats.FramesUncomp++; + if (len != (inlen - 4)) { + /* Wrong length. Send reset request */ + priv->stats.Errors++; + log(LOG_NOTICE, "ng_pred1: Uncomp length error (%d) " + "--> len (%d)\n", len, inlen - 4); + NG_FREE_M(m); + return (EIO); + } + Pred1SyncTable(node, priv->inbuf + 2, len); + m_adj(m, 2); /* Strip length. */ + m_adj(m, -2); /* Strip fcs. */ + *resultp = m; + } + + priv->stats.FramesPlain++; + priv->stats.OutOctets += len; + + return (0); +} + +/* + * Pred1Init() + */ + +static void +Pred1Init(node_p node) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + + priv->Hash = 0; + memset(priv->GuessTable, 0, PRED1_TABLE_SIZE); +} + +/* + * Pred1Compress() + */ + +static int +Pred1Compress(node_p node, u_char *source, u_char *dest, int len) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + int i, bitmask; + u_char flags; + u_char *flagdest, *orgdest; + + orgdest = dest; + while (len) { + flagdest = dest++; + flags = 0; /* All guesses are wrong initially. */ + for (bitmask = 1, i = 0; i < 8 && len; i++, bitmask <<= 1) { + if (priv->GuessTable[priv->Hash] == *source) + /* Guess was right - don't output. */ + flags |= bitmask; + else { + /* Guess wrong, output char. */ + priv->GuessTable[priv->Hash] = *source; + *dest++ = *source; + } + HASH(*source++); + len--; + } + *flagdest = flags; + } + return (dest - orgdest); +} + +/* + * Pred1Decompress() + * + * Returns decompressed size, or -1 if we ran out of space. + */ + +static int +Pred1Decompress(node_p node, u_char *source, u_char *dest, int slen, int dlen) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + int i, bitmask; + u_char flags, *orgdest; + + orgdest = dest; + while (slen) { + flags = *source++; + slen--; + for (i = 0, bitmask = 1; i < 8; i++, bitmask <<= 1) { + if (dlen <= 0) + return(-1); + if (flags & bitmask) + /* Guess correct */ + *dest = priv->GuessTable[priv->Hash]; + else { + if (!slen) + /* We seem to be really done -- cabo. */ + break; + + /* Guess wrong. */ + priv->GuessTable[priv->Hash] = *source; + /* Read from source. */ + *dest = *source++; + slen--; + } + HASH(*dest++); + dlen--; + } + } + return (dest - orgdest); +} + +/* + * Pred1SyncTable() + */ + +static void +Pred1SyncTable(node_p node, u_char *source, int len) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + + while (len--) { + priv->GuessTable[priv->Hash] = *source; + HASH(*source++); + } +} + +/* + * Crc16() + * + * Compute the 16 bit frame check value, per RFC 1171 Appendix B, + * on an array of bytes. + */ + +static uint16_t +Crc16(uint16_t crc, u_char *cp, int len) +{ + while (len--) + crc = (crc >> 8) ^ Crc16Table[(crc ^ *cp++) & 0xff]; + return (crc); +} + +static const uint16_t Crc16Table[256] = { +/* 00 */ 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, +/* 08 */ 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, +/* 10 */ 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, +/* 18 */ 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, +/* 20 */ 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, +/* 28 */ 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, +/* 30 */ 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, +/* 38 */ 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, +/* 40 */ 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, +/* 48 */ 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, +/* 50 */ 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, +/* 58 */ 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, +/* 60 */ 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, +/* 68 */ 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, +/* 70 */ 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, +/* 78 */ 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, +/* 80 */ 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, +/* 88 */ 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, +/* 90 */ 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, +/* 98 */ 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, +/* a0 */ 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, +/* a8 */ 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, +/* b0 */ 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, +/* b8 */ 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, +/* c0 */ 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, +/* c8 */ 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, +/* d0 */ 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, +/* d8 */ 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, +/* e0 */ 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, +/* e8 */ 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, +/* f0 */ 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, +/* f8 */ 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 +}; + diff --git a/sys/netgraph/ng_pred1.h b/sys/netgraph/ng_pred1.h new file mode 100644 index 0000000..a33d120 --- /dev/null +++ b/sys/netgraph/ng_pred1.h @@ -0,0 +1,83 @@ +/*- + * Copyright (c) 2006 Alexander Motin <mav@alkar.net> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice unmodified, this list of conditions, and the following + * disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _NETGRAPH_NG_PRED1_H_ +#define _NETGRAPH_NG_PRED1_H_ + +/* Node type name and magic cookie */ +#define NG_PRED1_NODE_TYPE "pred1" +#define NGM_PRED1_COOKIE 1166902612 + +/* Hook names */ +#define NG_PRED1_HOOK_COMP "comp" /* compression hook */ +#define NG_PRED1_HOOK_DECOMP "decomp" /* decompression hook */ + +/* Config struct */ +struct ng_pred1_config { + u_char enable; /* node enabled */ +}; + +/* Keep this in sync with the above structure definition. */ +#define NG_PRED1_CONFIG_INFO { \ + { "enable", &ng_parse_uint8_type }, \ + { NULL } \ +} + +/* Statistics structure for one direction. */ +struct ng_pred1_stats { + uint64_t FramesPlain; + uint64_t FramesComp; + uint64_t FramesUncomp; + uint64_t InOctets; + uint64_t OutOctets; + uint64_t Errors; +}; + +/* Keep this in sync with the above structure definition. */ +#define NG_PRED1_STATS_INFO { \ + { "FramesPlain",&ng_parse_uint64_type }, \ + { "FramesComp", &ng_parse_uint64_type }, \ + { "FramesUncomp", &ng_parse_uint64_type }, \ + { "InOctets", &ng_parse_uint64_type }, \ + { "OutOctets", &ng_parse_uint64_type }, \ + { "Errors", &ng_parse_uint64_type }, \ + { NULL } \ +} + +/* Netgraph commands */ +enum { + NGM_PRED1_CONFIG = 1, + NGM_PRED1_RESETREQ, /* sent either way! */ + NGM_PRED1_GET_STATS, + NGM_PRED1_CLR_STATS, + NGM_PRED1_GETCLR_STATS, +}; + +#endif /* _NETGRAPH_NG_PRED1_H_ */ + |