File: | net/slcompress.c |
Warning: | line 449, column 2 Null pointer passed as 2nd argument to memory copy function |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
1 | /* $OpenBSD: slcompress.c,v 1.12 2015/12/03 14:34:48 blambert Exp $ */ | |||
2 | /* $NetBSD: slcompress.c,v 1.17 1997/05/17 21:12:10 christos Exp $ */ | |||
3 | ||||
4 | /* | |||
5 | * Copyright (c) 1989, 1993, 1994 | |||
6 | * The Regents of the University of California. All rights reserved. | |||
7 | * | |||
8 | * Redistribution and use in source and binary forms, with or without | |||
9 | * modification, are permitted provided that the following conditions | |||
10 | * are met: | |||
11 | * 1. Redistributions of source code must retain the above copyright | |||
12 | * notice, this list of conditions and the following disclaimer. | |||
13 | * 2. Redistributions in binary form must reproduce the above copyright | |||
14 | * notice, this list of conditions and the following disclaimer in the | |||
15 | * documentation and/or other materials provided with the distribution. | |||
16 | * 3. Neither the name of the University nor the names of its contributors | |||
17 | * may be used to endorse or promote products derived from this software | |||
18 | * without specific prior written permission. | |||
19 | * | |||
20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |||
21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||
22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||
23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |||
24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||
25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||
26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||
27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||
28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||
29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||
30 | * SUCH DAMAGE. | |||
31 | * | |||
32 | * @(#)slcompress.c 8.2 (Berkeley) 4/16/94 | |||
33 | */ | |||
34 | ||||
35 | /* | |||
36 | * Routines to compress and uncompess tcp packets (for transmission | |||
37 | * over low speed serial lines. | |||
38 | * | |||
39 | * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989: | |||
40 | * - Initial distribution. | |||
41 | */ | |||
42 | ||||
43 | #include <sys/param.h> | |||
44 | #include <sys/mbuf.h> | |||
45 | #include <sys/systm.h> | |||
46 | ||||
47 | #include <netinet/in.h> | |||
48 | #include <netinet/ip.h> | |||
49 | #include <netinet/tcp.h> | |||
50 | ||||
51 | #include <net/slcompress.h> | |||
52 | ||||
53 | #ifndef SL_NO_STATS | |||
54 | #define INCR(counter)++comp->counter; ++comp->counter; | |||
55 | #else | |||
56 | #define INCR(counter)++comp->counter; | |||
57 | #endif | |||
58 | ||||
59 | #define BCMP(p1, p2, n)bcmp((char *)(p1), (char *)(p2), (int)(n)) bcmp((char *)(p1), (char *)(p2), (int)(n)) | |||
60 | #define BCOPY(p1, p2, n)bcopy((char *)(p1), (char *)(p2), (int)(n)) bcopy((char *)(p1), (char *)(p2), (int)(n)) | |||
61 | ||||
62 | void | |||
63 | sl_compress_init(struct slcompress *comp) | |||
64 | { | |||
65 | u_int i; | |||
66 | struct cstate *tstate = comp->tstate; | |||
67 | ||||
68 | bzero((char *)comp, sizeof(*comp))__builtin_bzero(((char *)comp), (sizeof(*comp))); | |||
69 | for (i = MAX_STATES16 - 1; i > 0; --i) { | |||
70 | tstate[i].cs_id = i; | |||
71 | tstate[i].cs_next = &tstate[i - 1]; | |||
72 | } | |||
73 | tstate[0].cs_next = &tstate[MAX_STATES16 - 1]; | |||
74 | tstate[0].cs_id = 0; | |||
75 | comp->last_cs = &tstate[0]; | |||
76 | comp->last_recv = 255; | |||
77 | comp->last_xmit = 255; | |||
78 | comp->flags = SLF_TOSS1; | |||
79 | } | |||
80 | ||||
81 | ||||
82 | /* | |||
83 | * Like sl_compress_init, but we get to specify the maximum connection | |||
84 | * ID to use on transmission. | |||
85 | */ | |||
86 | void | |||
87 | sl_compress_setup(struct slcompress *comp, int max_state) | |||
88 | { | |||
89 | u_int i; | |||
90 | struct cstate *tstate = comp->tstate; | |||
91 | ||||
92 | if (max_state == -1) { | |||
93 | max_state = MAX_STATES16 - 1; | |||
94 | bzero((char *)comp, sizeof(*comp))__builtin_bzero(((char *)comp), (sizeof(*comp))); | |||
95 | } else { | |||
96 | /* Don't reset statistics */ | |||
97 | bzero((char *)comp->tstate, sizeof(comp->tstate))__builtin_bzero(((char *)comp->tstate), (sizeof(comp->tstate ))); | |||
98 | bzero((char *)comp->rstate, sizeof(comp->rstate))__builtin_bzero(((char *)comp->rstate), (sizeof(comp->rstate ))); | |||
99 | } | |||
100 | for (i = max_state; i > 0; --i) { | |||
101 | tstate[i].cs_id = i; | |||
102 | tstate[i].cs_next = &tstate[i - 1]; | |||
103 | } | |||
104 | tstate[0].cs_next = &tstate[max_state]; | |||
105 | tstate[0].cs_id = 0; | |||
106 | comp->last_cs = &tstate[0]; | |||
107 | comp->last_recv = 255; | |||
108 | comp->last_xmit = 255; | |||
109 | comp->flags = SLF_TOSS1; | |||
110 | } | |||
111 | ||||
112 | ||||
113 | /* ENCODE encodes a number that is known to be non-zero. ENCODEZ | |||
114 | * checks for zero (since zero has to be encoded in the long, 3 byte | |||
115 | * form). | |||
116 | */ | |||
117 | #define ENCODE(n){ if ((u_int16_t)(n) >= 256) { *cp++ = 0; cp[1] = (n); cp[ 0] = (n) >> 8; cp += 2; } else { *cp++ = (n); } } { \ | |||
118 | if ((u_int16_t)(n) >= 256) { \ | |||
119 | *cp++ = 0; \ | |||
120 | cp[1] = (n); \ | |||
121 | cp[0] = (n) >> 8; \ | |||
122 | cp += 2; \ | |||
123 | } else { \ | |||
124 | *cp++ = (n); \ | |||
125 | } \ | |||
126 | } | |||
127 | #define ENCODEZ(n){ if ((u_int16_t)(n) >= 256 || (u_int16_t)(n) == 0) { *cp++ = 0; cp[1] = (n); cp[0] = (n) >> 8; cp += 2; } else { * cp++ = (n); } } { \ | |||
128 | if ((u_int16_t)(n) >= 256 || (u_int16_t)(n) == 0) { \ | |||
129 | *cp++ = 0; \ | |||
130 | cp[1] = (n); \ | |||
131 | cp[0] = (n) >> 8; \ | |||
132 | cp += 2; \ | |||
133 | } else { \ | |||
134 | *cp++ = (n); \ | |||
135 | } \ | |||
136 | } | |||
137 | ||||
138 | #define DECODEL(f){ if (*cp == 0) { (f) = (__uint32_t)(__builtin_constant_p((__uint32_t )(__builtin_constant_p(f) ? (__uint32_t)(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t )(f) & 0xff000000) >> 24) : __swap32md(f)) + ((cp[1 ] << 8) | cp[2])) ? (__uint32_t)(((__uint32_t)((__uint32_t )(__builtin_constant_p(f) ? (__uint32_t)(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t )(f) & 0xff000000) >> 24) : __swap32md(f)) + ((cp[1 ] << 8) | cp[2])) & 0xff) << 24 | ((__uint32_t )((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t)(((__uint32_t )(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ( (__uint32_t)(f) & 0xff000000) >> 24) : __swap32md(f )) + ((cp[1] << 8) | cp[2])) & 0xff00) << 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t )(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t)(f) & 0xff000000) >> 24) : __swap32md (f)) + ((cp[1] << 8) | cp[2])) & 0xff0000) >> 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t )(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t)(f) & 0xff000000) >> 24) : __swap32md (f)) + ((cp[1] << 8) | cp[2])) & 0xff000000) >> 24) : __swap32md((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t )(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t)(f) & 0xff000000) >> 24) : __swap32md (f)) + ((cp[1] << 8) | cp[2]))); cp += 3; } else { (f) = (__uint32_t)(__builtin_constant_p((__uint32_t)(__builtin_constant_p (f) ? (__uint32_t)(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t)(f) & 0xff000000 ) >> 24) : __swap32md(f)) + (u_int32_t)*cp++) ? (__uint32_t )(((__uint32_t)((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t )(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t)(f) & 0xff000000) >> 24) : __swap32md (f)) + (u_int32_t)*cp++) & 0xff) << 24 | ((__uint32_t )((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t)(((__uint32_t )(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ( (__uint32_t)(f) & 0xff000000) >> 24) : __swap32md(f )) + (u_int32_t)*cp++) & 0xff00) << 8 | ((__uint32_t )((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t)(((__uint32_t )(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ( (__uint32_t)(f) & 0xff000000) >> 24) : __swap32md(f )) + (u_int32_t)*cp++) & 0xff0000) >> 8 | ((__uint32_t )((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t)(((__uint32_t )(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ( (__uint32_t)(f) & 0xff000000) >> 24) : __swap32md(f )) + (u_int32_t)*cp++) & 0xff000000) >> 24) : __swap32md ((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t)(((__uint32_t )(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ( (__uint32_t)(f) & 0xff000000) >> 24) : __swap32md(f )) + (u_int32_t)*cp++)); } } { \ | |||
139 | if (*cp == 0) {\ | |||
140 | (f) = htonl(ntohl(f) + ((cp[1] << 8) | cp[2]))(__uint32_t)(__builtin_constant_p((__uint32_t)(__builtin_constant_p (f) ? (__uint32_t)(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t)(f) & 0xff000000 ) >> 24) : __swap32md(f)) + ((cp[1] << 8) | cp[2] )) ? (__uint32_t)(((__uint32_t)((__uint32_t)(__builtin_constant_p (f) ? (__uint32_t)(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t)(f) & 0xff000000 ) >> 24) : __swap32md(f)) + ((cp[1] << 8) | cp[2] )) & 0xff) << 24 | ((__uint32_t)((__uint32_t)(__builtin_constant_p (f) ? (__uint32_t)(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t)(f) & 0xff000000 ) >> 24) : __swap32md(f)) + ((cp[1] << 8) | cp[2] )) & 0xff00) << 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p (f) ? (__uint32_t)(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t)(f) & 0xff000000 ) >> 24) : __swap32md(f)) + ((cp[1] << 8) | cp[2] )) & 0xff0000) >> 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p (f) ? (__uint32_t)(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t)(f) & 0xff000000 ) >> 24) : __swap32md(f)) + ((cp[1] << 8) | cp[2] )) & 0xff000000) >> 24) : __swap32md((__uint32_t)(__builtin_constant_p (f) ? (__uint32_t)(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t)(f) & 0xff000000 ) >> 24) : __swap32md(f)) + ((cp[1] << 8) | cp[2] ))); \ | |||
141 | cp += 3; \ | |||
142 | } else { \ | |||
143 | (f) = htonl(ntohl(f) + (u_int32_t)*cp++)(__uint32_t)(__builtin_constant_p((__uint32_t)(__builtin_constant_p (f) ? (__uint32_t)(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t)(f) & 0xff000000 ) >> 24) : __swap32md(f)) + (u_int32_t)*cp++) ? (__uint32_t )(((__uint32_t)((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t )(((__uint32_t)(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ((__uint32_t)(f) & 0xff000000) >> 24) : __swap32md (f)) + (u_int32_t)*cp++) & 0xff) << 24 | ((__uint32_t )((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t)(((__uint32_t )(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ( (__uint32_t)(f) & 0xff000000) >> 24) : __swap32md(f )) + (u_int32_t)*cp++) & 0xff00) << 8 | ((__uint32_t )((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t)(((__uint32_t )(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ( (__uint32_t)(f) & 0xff000000) >> 24) : __swap32md(f )) + (u_int32_t)*cp++) & 0xff0000) >> 8 | ((__uint32_t )((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t)(((__uint32_t )(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ( (__uint32_t)(f) & 0xff000000) >> 24) : __swap32md(f )) + (u_int32_t)*cp++) & 0xff000000) >> 24) : __swap32md ((__uint32_t)(__builtin_constant_p(f) ? (__uint32_t)(((__uint32_t )(f) & 0xff) << 24 | ((__uint32_t)(f) & 0xff00) << 8 | ((__uint32_t)(f) & 0xff0000) >> 8 | ( (__uint32_t)(f) & 0xff000000) >> 24) : __swap32md(f )) + (u_int32_t)*cp++)); \ | |||
144 | } \ | |||
145 | } | |||
146 | ||||
147 | #define DECODES(f){ if (*cp == 0) { (f) = (__uint16_t)(__builtin_constant_p((__uint16_t )(__builtin_constant_p(f) ? (__uint16_t)(((__uint16_t)(f) & 0xffU) << 8 | ((__uint16_t)(f) & 0xff00U) >> 8) : __swap16md(f)) + ((cp[1] << 8) | cp[2])) ? (__uint16_t )(((__uint16_t)((__uint16_t)(__builtin_constant_p(f) ? (__uint16_t )(((__uint16_t)(f) & 0xffU) << 8 | ((__uint16_t)(f) & 0xff00U) >> 8) : __swap16md(f)) + ((cp[1] << 8) | cp[2])) & 0xffU) << 8 | ((__uint16_t)((__uint16_t )(__builtin_constant_p(f) ? (__uint16_t)(((__uint16_t)(f) & 0xffU) << 8 | ((__uint16_t)(f) & 0xff00U) >> 8) : __swap16md(f)) + ((cp[1] << 8) | cp[2])) & 0xff00U ) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p( f) ? (__uint16_t)(((__uint16_t)(f) & 0xffU) << 8 | ( (__uint16_t)(f) & 0xff00U) >> 8) : __swap16md(f)) + ((cp[1] << 8) | cp[2]))); cp += 3; } else { (f) = (__uint16_t )(__builtin_constant_p((__uint16_t)(__builtin_constant_p(f) ? (__uint16_t)(((__uint16_t)(f) & 0xffU) << 8 | ((__uint16_t )(f) & 0xff00U) >> 8) : __swap16md(f)) + (u_int32_t )*cp++) ? (__uint16_t)(((__uint16_t)((__uint16_t)(__builtin_constant_p (f) ? (__uint16_t)(((__uint16_t)(f) & 0xffU) << 8 | ((__uint16_t)(f) & 0xff00U) >> 8) : __swap16md(f)) + (u_int32_t)*cp++) & 0xffU) << 8 | ((__uint16_t)( (__uint16_t)(__builtin_constant_p(f) ? (__uint16_t)(((__uint16_t )(f) & 0xffU) << 8 | ((__uint16_t)(f) & 0xff00U ) >> 8) : __swap16md(f)) + (u_int32_t)*cp++) & 0xff00U ) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p( f) ? (__uint16_t)(((__uint16_t)(f) & 0xffU) << 8 | ( (__uint16_t)(f) & 0xff00U) >> 8) : __swap16md(f)) + (u_int32_t)*cp++)); } } { \ | |||
148 | if (*cp == 0) {\ | |||
149 | (f) = htons(ntohs(f) + ((cp[1] << 8) | cp[2]))(__uint16_t)(__builtin_constant_p((__uint16_t)(__builtin_constant_p (f) ? (__uint16_t)(((__uint16_t)(f) & 0xffU) << 8 | ((__uint16_t)(f) & 0xff00U) >> 8) : __swap16md(f)) + ((cp[1] << 8) | cp[2])) ? (__uint16_t)(((__uint16_t) ((__uint16_t)(__builtin_constant_p(f) ? (__uint16_t)(((__uint16_t )(f) & 0xffU) << 8 | ((__uint16_t)(f) & 0xff00U ) >> 8) : __swap16md(f)) + ((cp[1] << 8) | cp[2]) ) & 0xffU) << 8 | ((__uint16_t)((__uint16_t)(__builtin_constant_p (f) ? (__uint16_t)(((__uint16_t)(f) & 0xffU) << 8 | ((__uint16_t)(f) & 0xff00U) >> 8) : __swap16md(f)) + ((cp[1] << 8) | cp[2])) & 0xff00U) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p(f) ? (__uint16_t )(((__uint16_t)(f) & 0xffU) << 8 | ((__uint16_t)(f) & 0xff00U) >> 8) : __swap16md(f)) + ((cp[1] << 8) | cp[2]))); \ | |||
150 | cp += 3; \ | |||
151 | } else { \ | |||
152 | (f) = htons(ntohs(f) + (u_int32_t)*cp++)(__uint16_t)(__builtin_constant_p((__uint16_t)(__builtin_constant_p (f) ? (__uint16_t)(((__uint16_t)(f) & 0xffU) << 8 | ((__uint16_t)(f) & 0xff00U) >> 8) : __swap16md(f)) + (u_int32_t)*cp++) ? (__uint16_t)(((__uint16_t)((__uint16_t )(__builtin_constant_p(f) ? (__uint16_t)(((__uint16_t)(f) & 0xffU) << 8 | ((__uint16_t)(f) & 0xff00U) >> 8) : __swap16md(f)) + (u_int32_t)*cp++) & 0xffU) << 8 | ((__uint16_t)((__uint16_t)(__builtin_constant_p(f) ? (__uint16_t )(((__uint16_t)(f) & 0xffU) << 8 | ((__uint16_t)(f) & 0xff00U) >> 8) : __swap16md(f)) + (u_int32_t)*cp ++) & 0xff00U) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p (f) ? (__uint16_t)(((__uint16_t)(f) & 0xffU) << 8 | ((__uint16_t)(f) & 0xff00U) >> 8) : __swap16md(f)) + (u_int32_t)*cp++)); \ | |||
153 | } \ | |||
154 | } | |||
155 | ||||
156 | #define DECODEU(f){ if (*cp == 0) { (f) = (__uint16_t)(__builtin_constant_p((cp [1] << 8) | cp[2]) ? (__uint16_t)(((__uint16_t)((cp[1] << 8) | cp[2]) & 0xffU) << 8 | ((__uint16_t)((cp[1] << 8) | cp[2]) & 0xff00U) >> 8) : __swap16md((cp[1] << 8) | cp[2])); cp += 3; } else { (f) = (__uint16_t)(__builtin_constant_p ((u_int32_t)*cp++) ? (__uint16_t)(((__uint16_t)((u_int32_t)*cp ++) & 0xffU) << 8 | ((__uint16_t)((u_int32_t)*cp++) & 0xff00U) >> 8) : __swap16md((u_int32_t)*cp++)); } } { \ | |||
157 | if (*cp == 0) {\ | |||
158 | (f) = htons((cp[1] << 8) | cp[2])(__uint16_t)(__builtin_constant_p((cp[1] << 8) | cp[2]) ? (__uint16_t)(((__uint16_t)((cp[1] << 8) | cp[2]) & 0xffU) << 8 | ((__uint16_t)((cp[1] << 8) | cp[2] ) & 0xff00U) >> 8) : __swap16md((cp[1] << 8) | cp[2])); \ | |||
159 | cp += 3; \ | |||
160 | } else { \ | |||
161 | (f) = htons((u_int32_t)*cp++)(__uint16_t)(__builtin_constant_p((u_int32_t)*cp++) ? (__uint16_t )(((__uint16_t)((u_int32_t)*cp++) & 0xffU) << 8 | ( (__uint16_t)((u_int32_t)*cp++) & 0xff00U) >> 8) : __swap16md ((u_int32_t)*cp++)); \ | |||
162 | } \ | |||
163 | } | |||
164 | ||||
165 | u_int | |||
166 | sl_compress_tcp(struct mbuf *m, struct ip *ip, struct slcompress *comp, | |||
167 | int compress_cid) | |||
168 | { | |||
169 | struct cstate *cs = comp->last_cs->cs_next; | |||
170 | u_int hlen = ip->ip_hl; | |||
171 | struct tcphdr *oth; | |||
172 | struct tcphdr *th; | |||
173 | u_int deltaS, deltaA; | |||
174 | u_int changes = 0; | |||
175 | u_char new_seq[16]; | |||
176 | u_char *cp = new_seq; | |||
177 | ||||
178 | /* | |||
179 | * Bail if this is an IP fragment or if the TCP packet isn't | |||
180 | * `compressible' (i.e., ACK isn't set or some other control bit is | |||
181 | * set). (We assume that the caller has already made sure the | |||
182 | * packet is IP proto TCP). | |||
183 | */ | |||
184 | if ((ip->ip_off & htons(0x3fff)(__uint16_t)(__builtin_constant_p(0x3fff) ? (__uint16_t)(((__uint16_t )(0x3fff) & 0xffU) << 8 | ((__uint16_t)(0x3fff) & 0xff00U) >> 8) : __swap16md(0x3fff))) || m->m_lenm_hdr.mh_len < 40) | |||
185 | return (TYPE_IP0x40); | |||
186 | ||||
187 | th = (struct tcphdr *)&((int32_t *)ip)[hlen]; | |||
188 | if ((th->th_flags & (TH_SYN0x02|TH_FIN0x01|TH_RST0x04|TH_ACK0x10)) != TH_ACK0x10) | |||
189 | return (TYPE_IP0x40); | |||
190 | /* | |||
191 | * Packet is compressible -- we're going to send either a | |||
192 | * COMPRESSED_TCP or UNCOMPRESSED_TCP packet. Either way we need | |||
193 | * to locate (or create) the connection state. Special case the | |||
194 | * most recently used connection since it's most likely to be used | |||
195 | * again & we don't have to do any reordering if it's used. | |||
196 | */ | |||
197 | INCR(sls_packets)++comp->sls_packets; | |||
198 | if (ip->ip_src.s_addr != cs->cs_ipslcs_u.csu_ip.ip_src.s_addr || | |||
199 | ip->ip_dst.s_addr != cs->cs_ipslcs_u.csu_ip.ip_dst.s_addr || | |||
200 | *(int32_t *)th != ((int32_t *)&cs->cs_ipslcs_u.csu_ip)[cs->cs_ipslcs_u.csu_ip.ip_hl]) { | |||
201 | /* | |||
202 | * Wasn't the first -- search for it. | |||
203 | * | |||
204 | * States are kept in a circularly linked list with | |||
205 | * last_cs pointing to the end of the list. The | |||
206 | * list is kept in lru order by moving a state to the | |||
207 | * head of the list whenever it is referenced. Since | |||
208 | * the list is short and, empirically, the connection | |||
209 | * we want is almost always near the front, we locate | |||
210 | * states via linear search. If we don't find a state | |||
211 | * for the datagram, the oldest state is (re-)used. | |||
212 | */ | |||
213 | struct cstate *lcs; | |||
214 | struct cstate *lastcs = comp->last_cs; | |||
215 | ||||
216 | do { | |||
217 | lcs = cs; cs = cs->cs_next; | |||
218 | INCR(sls_searches)++comp->sls_searches; | |||
219 | if (ip->ip_src.s_addr == cs->cs_ipslcs_u.csu_ip.ip_src.s_addr | |||
220 | && ip->ip_dst.s_addr == cs->cs_ipslcs_u.csu_ip.ip_dst.s_addr | |||
221 | && *(int32_t *)th == | |||
222 | ((int32_t *)&cs->cs_ipslcs_u.csu_ip)[cs->cs_ipslcs_u.csu_ip.ip_hl]) | |||
223 | goto found; | |||
224 | } while (cs != lastcs); | |||
225 | ||||
226 | /* | |||
227 | * Didn't find it -- re-use oldest cstate. Send an | |||
228 | * uncompressed packet that tells the other side what | |||
229 | * connection number we're using for this conversation. | |||
230 | * Note that since the state list is circular, the oldest | |||
231 | * state points to the newest and we only need to set | |||
232 | * last_cs to update the lru linkage. | |||
233 | */ | |||
234 | INCR(sls_misses)++comp->sls_misses; | |||
235 | comp->last_cs = lcs; | |||
236 | hlen += th->th_off; | |||
237 | hlen <<= 2; | |||
238 | goto uncompressed; | |||
239 | ||||
240 | found: | |||
241 | /* | |||
242 | * Found it -- move to the front on the connection list. | |||
243 | */ | |||
244 | if (cs == lastcs) | |||
245 | comp->last_cs = lcs; | |||
246 | else { | |||
247 | lcs->cs_next = cs->cs_next; | |||
248 | cs->cs_next = lastcs->cs_next; | |||
249 | lastcs->cs_next = cs; | |||
250 | } | |||
251 | } | |||
252 | ||||
253 | /* | |||
254 | * Make sure that only what we expect to change changed. The first | |||
255 | * line of the `if' checks the IP protocol version, header length & | |||
256 | * type of service. The 2nd line checks the "Don't fragment" bit. | |||
257 | * The 3rd line checks the time-to-live and protocol (the protocol | |||
258 | * check is unnecessary but costless). The 4th line checks the TCP | |||
259 | * header length. The 5th line checks IP options, if any. The 6th | |||
260 | * line checks TCP options, if any. If any of these things are | |||
261 | * different between the previous & current datagram, we send the | |||
262 | * current datagram `uncompressed'. | |||
263 | */ | |||
264 | oth = (struct tcphdr *)&((int32_t *)&cs->cs_ipslcs_u.csu_ip)[hlen]; | |||
265 | deltaS = hlen; | |||
266 | hlen += th->th_off; | |||
267 | hlen <<= 2; | |||
268 | ||||
269 | if (((u_int16_t *)ip)[0] != ((u_int16_t *)&cs->cs_ipslcs_u.csu_ip)[0] || | |||
270 | ((u_int16_t *)ip)[3] != ((u_int16_t *)&cs->cs_ipslcs_u.csu_ip)[3] || | |||
271 | ((u_int16_t *)ip)[4] != ((u_int16_t *)&cs->cs_ipslcs_u.csu_ip)[4] || | |||
272 | th->th_off != oth->th_off || | |||
273 | (deltaS > 5 && | |||
274 | BCMP(ip + 1, &cs->cs_ip + 1, (deltaS - 5) << 2)bcmp((char *)(ip + 1), (char *)(&cs->slcs_u.csu_ip + 1 ), (int)((deltaS - 5) << 2))) || | |||
275 | (th->th_off > 5 && | |||
276 | BCMP(th + 1, oth + 1, (th->th_off - 5) << 2)bcmp((char *)(th + 1), (char *)(oth + 1), (int)((th->th_off - 5) << 2)))) | |||
277 | goto uncompressed; | |||
278 | ||||
279 | /* | |||
280 | * Figure out which of the changing fields changed. The | |||
281 | * receiver expects changes in the order: urgent, window, | |||
282 | * ack, seq (the order minimizes the number of temporaries | |||
283 | * needed in this section of code). | |||
284 | */ | |||
285 | if (th->th_flags & TH_URG0x20) { | |||
286 | deltaS = ntohs(th->th_urp)(__uint16_t)(__builtin_constant_p(th->th_urp) ? (__uint16_t )(((__uint16_t)(th->th_urp) & 0xffU) << 8 | ((__uint16_t )(th->th_urp) & 0xff00U) >> 8) : __swap16md(th-> th_urp)); | |||
287 | ENCODEZ(deltaS){ if ((u_int16_t)(deltaS) >= 256 || (u_int16_t)(deltaS) == 0) { *cp++ = 0; cp[1] = (deltaS); cp[0] = (deltaS) >> 8 ; cp += 2; } else { *cp++ = (deltaS); } }; | |||
288 | changes |= NEW_U0x01; | |||
289 | } else if (th->th_urp != oth->th_urp) | |||
290 | /* argh! URG not set but urp changed -- a sensible | |||
291 | * implementation should never do this but RFC793 | |||
292 | * doesn't prohibit the change so we have to deal | |||
293 | * with it. */ | |||
294 | goto uncompressed; | |||
295 | ||||
296 | deltaS = (u_int16_t)(ntohs(th->th_win)(__uint16_t)(__builtin_constant_p(th->th_win) ? (__uint16_t )(((__uint16_t)(th->th_win) & 0xffU) << 8 | ((__uint16_t )(th->th_win) & 0xff00U) >> 8) : __swap16md(th-> th_win)) - ntohs(oth->th_win)(__uint16_t)(__builtin_constant_p(oth->th_win) ? (__uint16_t )(((__uint16_t)(oth->th_win) & 0xffU) << 8 | ((__uint16_t )(oth->th_win) & 0xff00U) >> 8) : __swap16md(oth ->th_win))); | |||
297 | if (deltaS) { | |||
298 | ENCODE(deltaS){ if ((u_int16_t)(deltaS) >= 256) { *cp++ = 0; cp[1] = (deltaS ); cp[0] = (deltaS) >> 8; cp += 2; } else { *cp++ = (deltaS ); } }; | |||
299 | changes |= NEW_W0x02; | |||
300 | } | |||
301 | ||||
302 | deltaA = ntohl(th->th_ack)(__uint32_t)(__builtin_constant_p(th->th_ack) ? (__uint32_t )(((__uint32_t)(th->th_ack) & 0xff) << 24 | ((__uint32_t )(th->th_ack) & 0xff00) << 8 | ((__uint32_t)(th-> th_ack) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack ) & 0xff000000) >> 24) : __swap32md(th->th_ack)) - ntohl(oth->th_ack)(__uint32_t)(__builtin_constant_p(oth->th_ack) ? (__uint32_t )(((__uint32_t)(oth->th_ack) & 0xff) << 24 | ((__uint32_t )(oth->th_ack) & 0xff00) << 8 | ((__uint32_t)(oth ->th_ack) & 0xff0000) >> 8 | ((__uint32_t)(oth-> th_ack) & 0xff000000) >> 24) : __swap32md(oth->th_ack )); | |||
303 | if (deltaA) { | |||
304 | if (deltaA > 0xffff) | |||
305 | goto uncompressed; | |||
306 | ENCODE(deltaA){ if ((u_int16_t)(deltaA) >= 256) { *cp++ = 0; cp[1] = (deltaA ); cp[0] = (deltaA) >> 8; cp += 2; } else { *cp++ = (deltaA ); } }; | |||
307 | changes |= NEW_A0x04; | |||
308 | } | |||
309 | ||||
310 | deltaS = ntohl(th->th_seq)(__uint32_t)(__builtin_constant_p(th->th_seq) ? (__uint32_t )(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t )(th->th_seq) & 0xff00) << 8 | ((__uint32_t)(th-> th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq ) & 0xff000000) >> 24) : __swap32md(th->th_seq)) - ntohl(oth->th_seq)(__uint32_t)(__builtin_constant_p(oth->th_seq) ? (__uint32_t )(((__uint32_t)(oth->th_seq) & 0xff) << 24 | ((__uint32_t )(oth->th_seq) & 0xff00) << 8 | ((__uint32_t)(oth ->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(oth-> th_seq) & 0xff000000) >> 24) : __swap32md(oth->th_seq )); | |||
311 | if (deltaS) { | |||
312 | if (deltaS > 0xffff) | |||
313 | goto uncompressed; | |||
314 | ENCODE(deltaS){ if ((u_int16_t)(deltaS) >= 256) { *cp++ = 0; cp[1] = (deltaS ); cp[0] = (deltaS) >> 8; cp += 2; } else { *cp++ = (deltaS ); } }; | |||
315 | changes |= NEW_S0x08; | |||
316 | } | |||
317 | ||||
318 | switch(changes) { | |||
319 | ||||
320 | case 0: | |||
321 | /* | |||
322 | * Nothing changed. If this packet contains data and the | |||
323 | * last one didn't, this is probably a data packet following | |||
324 | * an ack (normal on an interactive connection) and we send | |||
325 | * it compressed. Otherwise it's probably a retransmit, | |||
326 | * retransmitted ack or window probe. Send it uncompressed | |||
327 | * in case the other side missed the compressed version. | |||
328 | */ | |||
329 | if (ip->ip_len != cs->cs_ipslcs_u.csu_ip.ip_len && | |||
330 | ntohs(cs->cs_ip.ip_len)(__uint16_t)(__builtin_constant_p(cs->slcs_u.csu_ip.ip_len ) ? (__uint16_t)(((__uint16_t)(cs->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t)(cs->slcs_u.csu_ip.ip_len ) & 0xff00U) >> 8) : __swap16md(cs->slcs_u.csu_ip .ip_len)) == hlen) | |||
331 | break; | |||
332 | ||||
333 | /* FALLTHROUGH */ | |||
334 | ||||
335 | case SPECIAL_I(0x08|0x02|0x01): | |||
336 | case SPECIAL_D(0x08|0x04|0x02|0x01): | |||
337 | /* | |||
338 | * actual changes match one of our special case encodings -- | |||
339 | * send packet uncompressed. | |||
340 | */ | |||
341 | goto uncompressed; | |||
342 | ||||
343 | case NEW_S0x08|NEW_A0x04: | |||
344 | if (deltaS == deltaA && | |||
345 | deltaS == ntohs(cs->cs_ip.ip_len)(__uint16_t)(__builtin_constant_p(cs->slcs_u.csu_ip.ip_len ) ? (__uint16_t)(((__uint16_t)(cs->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t)(cs->slcs_u.csu_ip.ip_len ) & 0xff00U) >> 8) : __swap16md(cs->slcs_u.csu_ip .ip_len)) - hlen) { | |||
346 | /* special case for echoed terminal traffic */ | |||
347 | changes = SPECIAL_I(0x08|0x02|0x01); | |||
348 | cp = new_seq; | |||
349 | } | |||
350 | break; | |||
351 | ||||
352 | case NEW_S0x08: | |||
353 | if (deltaS == ntohs(cs->cs_ip.ip_len)(__uint16_t)(__builtin_constant_p(cs->slcs_u.csu_ip.ip_len ) ? (__uint16_t)(((__uint16_t)(cs->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t)(cs->slcs_u.csu_ip.ip_len ) & 0xff00U) >> 8) : __swap16md(cs->slcs_u.csu_ip .ip_len)) - hlen) { | |||
354 | /* special case for data xfer */ | |||
355 | changes = SPECIAL_D(0x08|0x04|0x02|0x01); | |||
356 | cp = new_seq; | |||
357 | } | |||
358 | break; | |||
359 | } | |||
360 | ||||
361 | deltaS = ntohs(ip->ip_id)(__uint16_t)(__builtin_constant_p(ip->ip_id) ? (__uint16_t )(((__uint16_t)(ip->ip_id) & 0xffU) << 8 | ((__uint16_t )(ip->ip_id) & 0xff00U) >> 8) : __swap16md(ip-> ip_id)) - ntohs(cs->cs_ip.ip_id)(__uint16_t)(__builtin_constant_p(cs->slcs_u.csu_ip.ip_id) ? (__uint16_t)(((__uint16_t)(cs->slcs_u.csu_ip.ip_id) & 0xffU) << 8 | ((__uint16_t)(cs->slcs_u.csu_ip.ip_id ) & 0xff00U) >> 8) : __swap16md(cs->slcs_u.csu_ip .ip_id)); | |||
362 | if (deltaS != 1) { | |||
363 | ENCODEZ(deltaS){ if ((u_int16_t)(deltaS) >= 256 || (u_int16_t)(deltaS) == 0) { *cp++ = 0; cp[1] = (deltaS); cp[0] = (deltaS) >> 8 ; cp += 2; } else { *cp++ = (deltaS); } }; | |||
364 | changes |= NEW_I0x20; | |||
365 | } | |||
366 | if (th->th_flags & TH_PUSH0x08) | |||
367 | changes |= TCP_PUSH_BIT0x10; | |||
368 | /* | |||
369 | * Grab the cksum before we overwrite it below. Then update our | |||
370 | * state with this packet's header. | |||
371 | */ | |||
372 | deltaA = ntohs(th->th_sum)(__uint16_t)(__builtin_constant_p(th->th_sum) ? (__uint16_t )(((__uint16_t)(th->th_sum) & 0xffU) << 8 | ((__uint16_t )(th->th_sum) & 0xff00U) >> 8) : __swap16md(th-> th_sum)); | |||
373 | BCOPY(ip, &cs->cs_ip, hlen)bcopy((char *)(ip), (char *)(&cs->slcs_u.csu_ip), (int )(hlen)); | |||
374 | ||||
375 | /* | |||
376 | * We want to use the original packet as our compressed packet. | |||
377 | * (cp - new_seq) is the number of bytes we need for compressed | |||
378 | * sequence numbers. In addition we need one byte for the change | |||
379 | * mask, one for the connection id and two for the tcp checksum. | |||
380 | * So, (cp - new_seq) + 4 bytes of header are needed. hlen is how | |||
381 | * many bytes of the original packet to toss so subtract the two to | |||
382 | * get the new packet size. | |||
383 | */ | |||
384 | deltaS = cp - new_seq; | |||
385 | cp = (u_char *)ip; | |||
386 | if (compress_cid == 0 || comp->last_xmit != cs->cs_id) { | |||
387 | comp->last_xmit = cs->cs_id; | |||
388 | hlen -= deltaS + 4; | |||
389 | cp += hlen; | |||
390 | *cp++ = changes | NEW_C0x40; | |||
391 | *cp++ = cs->cs_id; | |||
392 | } else { | |||
393 | hlen -= deltaS + 3; | |||
394 | cp += hlen; | |||
395 | *cp++ = changes; | |||
396 | } | |||
397 | m->m_lenm_hdr.mh_len -= hlen; | |||
398 | m->m_datam_hdr.mh_data += hlen; | |||
399 | *cp++ = deltaA >> 8; | |||
400 | *cp++ = deltaA; | |||
401 | BCOPY(new_seq, cp, deltaS)bcopy((char *)(new_seq), (char *)(cp), (int)(deltaS)); | |||
402 | INCR(sls_compressed)++comp->sls_compressed; | |||
403 | return (TYPE_COMPRESSED_TCP0x80); | |||
404 | ||||
405 | /* | |||
406 | * Update connection state cs & send uncompressed packet ('uncompressed' | |||
407 | * means a regular ip/tcp packet but with the 'conversation id' we hope | |||
408 | * to use on future compressed packets in the protocol field). | |||
409 | */ | |||
410 | uncompressed: | |||
411 | BCOPY(ip, &cs->cs_ip, hlen)bcopy((char *)(ip), (char *)(&cs->slcs_u.csu_ip), (int )(hlen)); | |||
412 | ip->ip_p = cs->cs_id; | |||
413 | comp->last_xmit = cs->cs_id; | |||
414 | return (TYPE_UNCOMPRESSED_TCP0x70); | |||
415 | } | |||
416 | ||||
417 | ||||
418 | int | |||
419 | sl_uncompress_tcp(u_char **bufp, int len, u_int type, struct slcompress *comp) | |||
420 | { | |||
421 | u_char *hdr, *cp; | |||
422 | int hlen, vjlen; | |||
423 | ||||
424 | cp = bufp? *bufp: NULL((void *)0); | |||
| ||||
425 | vjlen = sl_uncompress_tcp_core(cp, len, len, type, comp, &hdr, &hlen); | |||
426 | if (vjlen < 0) | |||
427 | return (0); /* error */ | |||
428 | if (vjlen == 0) | |||
429 | return (len); /* was uncompressed already */ | |||
430 | ||||
431 | cp += vjlen; | |||
432 | len -= vjlen; | |||
433 | ||||
434 | /* | |||
435 | * At this point, cp points to the first byte of data in the | |||
436 | * packet. If we're not aligned on a 4-byte boundary, copy the | |||
437 | * data down so the ip & tcp headers will be aligned. Then back up | |||
438 | * cp by the tcp/ip header length to make room for the reconstructed | |||
439 | * header (we assume the packet we were handed has enough space to | |||
440 | * prepend 128 bytes of header). | |||
441 | */ | |||
442 | if ((long)cp & 3) { | |||
443 | if (len > 0) | |||
444 | (void) memmove((caddr_t)((long)cp &~ 3), cp, len)__builtin_memmove(((caddr_t)((long)cp &~ 3)), (cp), (len) ); | |||
445 | cp = (u_char *)((long)cp &~ 3); | |||
446 | } | |||
447 | cp -= hlen; | |||
448 | len += hlen; | |||
449 | BCOPY(hdr, cp, hlen)bcopy((char *)(hdr), (char *)(cp), (int)(hlen)); | |||
| ||||
450 | ||||
451 | *bufp = cp; | |||
452 | return (len); | |||
453 | } | |||
454 | ||||
455 | /* | |||
456 | * Uncompress a packet of total length total_len. The first buflen | |||
457 | * bytes are at buf; this must include the entire (compressed or | |||
458 | * uncompressed) TCP/IP header. This procedure returns the length | |||
459 | * of the VJ header, with a pointer to the uncompressed IP header | |||
460 | * in *hdrp and its length in *hlenp. | |||
461 | */ | |||
462 | int | |||
463 | sl_uncompress_tcp_core(u_char *buf, int buflen, int total_len, u_int type, | |||
464 | struct slcompress *comp, u_char **hdrp, u_int *hlenp) | |||
465 | { | |||
466 | u_char *cp; | |||
467 | u_int hlen, changes; | |||
468 | struct tcphdr *th; | |||
469 | struct cstate *cs; | |||
470 | struct ip *ip; | |||
471 | u_int16_t *bp; | |||
472 | u_int vjlen; | |||
473 | ||||
474 | switch (type) { | |||
475 | ||||
476 | case TYPE_UNCOMPRESSED_TCP0x70: | |||
477 | ip = (struct ip *) buf; | |||
478 | if (ip->ip_p >= MAX_STATES16) | |||
479 | goto bad; | |||
480 | cs = &comp->rstate[comp->last_recv = ip->ip_p]; | |||
481 | comp->flags &=~ SLF_TOSS1; | |||
482 | ip->ip_p = IPPROTO_TCP6; | |||
483 | /* | |||
484 | * Calculate the size of the TCP/IP header and make sure that | |||
485 | * we don't overflow the space we have available for it. | |||
486 | */ | |||
487 | hlen = ip->ip_hl << 2; | |||
488 | if (hlen + sizeof(struct tcphdr) > buflen) | |||
489 | goto bad; | |||
490 | hlen += ((struct tcphdr *)&((char *)ip)[hlen])->th_off << 2; | |||
491 | if (hlen > MAX_HDR(256 - sizeof(struct m_hdr)) || hlen > buflen) | |||
492 | goto bad; | |||
493 | BCOPY(ip, &cs->cs_ip, hlen)bcopy((char *)(ip), (char *)(&cs->slcs_u.csu_ip), (int )(hlen)); | |||
494 | cs->cs_hlen = hlen; | |||
495 | INCR(sls_uncompressedin)++comp->sls_uncompressedin; | |||
496 | *hdrp = (u_char *) &cs->cs_ipslcs_u.csu_ip; | |||
497 | *hlenp = hlen; | |||
498 | return (0); | |||
499 | ||||
500 | default: | |||
501 | goto bad; | |||
502 | ||||
503 | case TYPE_COMPRESSED_TCP0x80: | |||
504 | break; | |||
505 | } | |||
506 | /* We've got a compressed packet. */ | |||
507 | INCR(sls_compressedin)++comp->sls_compressedin; | |||
508 | cp = buf; | |||
509 | changes = *cp++; | |||
510 | if (changes & NEW_C0x40) { | |||
511 | /* Make sure the state index is in range, then grab the state. | |||
512 | * If we have a good state index, clear the 'discard' flag. */ | |||
513 | if (*cp >= MAX_STATES16) | |||
514 | goto bad; | |||
515 | ||||
516 | comp->flags &=~ SLF_TOSS1; | |||
517 | comp->last_recv = *cp++; | |||
518 | } else { | |||
519 | /* this packet has an implicit state index. If we've | |||
520 | * had a line error since the last time we got an | |||
521 | * explicit state index, we have to toss the packet. */ | |||
522 | if (comp->flags & SLF_TOSS1) { | |||
523 | INCR(sls_tossed)++comp->sls_tossed; | |||
524 | return (-1); | |||
525 | } | |||
526 | } | |||
527 | cs = &comp->rstate[comp->last_recv]; | |||
528 | hlen = cs->cs_ipslcs_u.csu_ip.ip_hl << 2; | |||
529 | th = (struct tcphdr *)&((u_char *)&cs->cs_ipslcs_u.csu_ip)[hlen]; | |||
530 | th->th_sum = htons((*cp << 8) | cp[1])(__uint16_t)(__builtin_constant_p((*cp << 8) | cp[1]) ? (__uint16_t)(((__uint16_t)((*cp << 8) | cp[1]) & 0xffU ) << 8 | ((__uint16_t)((*cp << 8) | cp[1]) & 0xff00U ) >> 8) : __swap16md((*cp << 8) | cp[1])); | |||
531 | cp += 2; | |||
532 | if (changes & TCP_PUSH_BIT0x10) | |||
533 | th->th_flags |= TH_PUSH0x08; | |||
534 | else | |||
535 | th->th_flags &=~ TH_PUSH0x08; | |||
536 | ||||
537 | switch (changes & SPECIALS_MASK(0x08|0x04|0x02|0x01)) { | |||
538 | case SPECIAL_I(0x08|0x02|0x01): | |||
539 | { | |||
540 | u_int i = ntohs(cs->cs_ip.ip_len)(__uint16_t)(__builtin_constant_p(cs->slcs_u.csu_ip.ip_len ) ? (__uint16_t)(((__uint16_t)(cs->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t)(cs->slcs_u.csu_ip.ip_len ) & 0xff00U) >> 8) : __swap16md(cs->slcs_u.csu_ip .ip_len)) - cs->cs_hlen; | |||
541 | th->th_ack = htonl(ntohl(th->th_ack) + i)(__uint32_t)(__builtin_constant_p((__uint32_t)(__builtin_constant_p (th->th_ack) ? (__uint32_t)(((__uint32_t)(th->th_ack) & 0xff) << 24 | ((__uint32_t)(th->th_ack) & 0xff00 ) << 8 | ((__uint32_t)(th->th_ack) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack) & 0xff000000) >> 24 ) : __swap32md(th->th_ack)) + i) ? (__uint32_t)(((__uint32_t )((__uint32_t)(__builtin_constant_p(th->th_ack) ? (__uint32_t )(((__uint32_t)(th->th_ack) & 0xff) << 24 | ((__uint32_t )(th->th_ack) & 0xff00) << 8 | ((__uint32_t)(th-> th_ack) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack ) & 0xff000000) >> 24) : __swap32md(th->th_ack)) + i) & 0xff) << 24 | ((__uint32_t)((__uint32_t)(__builtin_constant_p (th->th_ack) ? (__uint32_t)(((__uint32_t)(th->th_ack) & 0xff) << 24 | ((__uint32_t)(th->th_ack) & 0xff00 ) << 8 | ((__uint32_t)(th->th_ack) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack) & 0xff000000) >> 24 ) : __swap32md(th->th_ack)) + i) & 0xff00) << 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p(th->th_ack ) ? (__uint32_t)(((__uint32_t)(th->th_ack) & 0xff) << 24 | ((__uint32_t)(th->th_ack) & 0xff00) << 8 | ((__uint32_t)(th->th_ack) & 0xff0000) >> 8 | (( __uint32_t)(th->th_ack) & 0xff000000) >> 24) : __swap32md (th->th_ack)) + i) & 0xff0000) >> 8 | ((__uint32_t )((__uint32_t)(__builtin_constant_p(th->th_ack) ? (__uint32_t )(((__uint32_t)(th->th_ack) & 0xff) << 24 | ((__uint32_t )(th->th_ack) & 0xff00) << 8 | ((__uint32_t)(th-> th_ack) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack ) & 0xff000000) >> 24) : __swap32md(th->th_ack)) + i) & 0xff000000) >> 24) : __swap32md((__uint32_t )(__builtin_constant_p(th->th_ack) ? (__uint32_t)(((__uint32_t )(th->th_ack) & 0xff) << 24 | ((__uint32_t)(th-> th_ack) & 0xff00) << 8 | ((__uint32_t)(th->th_ack ) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack) & 0xff000000) >> 24) : __swap32md(th->th_ack)) + i)); | |||
542 | th->th_seq = htonl(ntohl(th->th_seq) + i)(__uint32_t)(__builtin_constant_p((__uint32_t)(__builtin_constant_p (th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00 ) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24 ) : __swap32md(th->th_seq)) + i) ? (__uint32_t)(((__uint32_t )((__uint32_t)(__builtin_constant_p(th->th_seq) ? (__uint32_t )(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t )(th->th_seq) & 0xff00) << 8 | ((__uint32_t)(th-> th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq ) & 0xff000000) >> 24) : __swap32md(th->th_seq)) + i) & 0xff) << 24 | ((__uint32_t)((__uint32_t)(__builtin_constant_p (th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00 ) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24 ) : __swap32md(th->th_seq)) + i) & 0xff00) << 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p(th->th_seq ) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | (( __uint32_t)(th->th_seq) & 0xff000000) >> 24) : __swap32md (th->th_seq)) + i) & 0xff0000) >> 8 | ((__uint32_t )((__uint32_t)(__builtin_constant_p(th->th_seq) ? (__uint32_t )(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t )(th->th_seq) & 0xff00) << 8 | ((__uint32_t)(th-> th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq ) & 0xff000000) >> 24) : __swap32md(th->th_seq)) + i) & 0xff000000) >> 24) : __swap32md((__uint32_t )(__builtin_constant_p(th->th_seq) ? (__uint32_t)(((__uint32_t )(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th-> th_seq) & 0xff00) << 8 | ((__uint32_t)(th->th_seq ) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24) : __swap32md(th->th_seq)) + i)); | |||
543 | } | |||
544 | break; | |||
545 | ||||
546 | case SPECIAL_D(0x08|0x04|0x02|0x01): | |||
547 | th->th_seq = htonl(ntohl(th->th_seq) + ntohs(cs->cs_ip.ip_len)(__uint32_t)(__builtin_constant_p((__uint32_t)(__builtin_constant_p (th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00 ) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24 ) : __swap32md(th->th_seq)) + (__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_len) ? (__uint16_t)(((__uint16_t)(cs ->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t )(cs->slcs_u.csu_ip.ip_len) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_len)) - cs->cs_hlen) ? (__uint32_t )(((__uint32_t)((__uint32_t)(__builtin_constant_p(th->th_seq ) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | (( __uint32_t)(th->th_seq) & 0xff000000) >> 24) : __swap32md (th->th_seq)) + (__uint16_t)(__builtin_constant_p(cs->slcs_u .csu_ip.ip_len) ? (__uint16_t)(((__uint16_t)(cs->slcs_u.csu_ip .ip_len) & 0xffU) << 8 | ((__uint16_t)(cs->slcs_u .csu_ip.ip_len) & 0xff00U) >> 8) : __swap16md(cs-> slcs_u.csu_ip.ip_len)) - cs->cs_hlen) & 0xff) << 24 | ((__uint32_t)((__uint32_t)(__builtin_constant_p(th-> th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff ) << 24 | ((__uint32_t)(th->th_seq) & 0xff00) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24) : __swap32md(th->th_seq)) + (__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_len) ? (__uint16_t)(((__uint16_t)(cs ->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t )(cs->slcs_u.csu_ip.ip_len) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_len)) - cs->cs_hlen) & 0xff00 ) << 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p (th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00 ) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24 ) : __swap32md(th->th_seq)) + (__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_len) ? (__uint16_t)(((__uint16_t)(cs ->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t )(cs->slcs_u.csu_ip.ip_len) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_len)) - cs->cs_hlen) & 0xff0000 ) >> 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p (th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00 ) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24 ) : __swap32md(th->th_seq)) + (__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_len) ? (__uint16_t)(((__uint16_t)(cs ->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t )(cs->slcs_u.csu_ip.ip_len) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_len)) - cs->cs_hlen) & 0xff000000 ) >> 24) : __swap32md((__uint32_t)(__builtin_constant_p (th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00 ) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24 ) : __swap32md(th->th_seq)) + (__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_len) ? (__uint16_t)(((__uint16_t)(cs ->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t )(cs->slcs_u.csu_ip.ip_len) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_len)) - cs->cs_hlen)) | |||
548 | - cs->cs_hlen)(__uint32_t)(__builtin_constant_p((__uint32_t)(__builtin_constant_p (th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00 ) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24 ) : __swap32md(th->th_seq)) + (__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_len) ? (__uint16_t)(((__uint16_t)(cs ->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t )(cs->slcs_u.csu_ip.ip_len) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_len)) - cs->cs_hlen) ? (__uint32_t )(((__uint32_t)((__uint32_t)(__builtin_constant_p(th->th_seq ) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | (( __uint32_t)(th->th_seq) & 0xff000000) >> 24) : __swap32md (th->th_seq)) + (__uint16_t)(__builtin_constant_p(cs->slcs_u .csu_ip.ip_len) ? (__uint16_t)(((__uint16_t)(cs->slcs_u.csu_ip .ip_len) & 0xffU) << 8 | ((__uint16_t)(cs->slcs_u .csu_ip.ip_len) & 0xff00U) >> 8) : __swap16md(cs-> slcs_u.csu_ip.ip_len)) - cs->cs_hlen) & 0xff) << 24 | ((__uint32_t)((__uint32_t)(__builtin_constant_p(th-> th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff ) << 24 | ((__uint32_t)(th->th_seq) & 0xff00) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24) : __swap32md(th->th_seq)) + (__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_len) ? (__uint16_t)(((__uint16_t)(cs ->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t )(cs->slcs_u.csu_ip.ip_len) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_len)) - cs->cs_hlen) & 0xff00 ) << 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p (th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00 ) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24 ) : __swap32md(th->th_seq)) + (__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_len) ? (__uint16_t)(((__uint16_t)(cs ->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t )(cs->slcs_u.csu_ip.ip_len) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_len)) - cs->cs_hlen) & 0xff0000 ) >> 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p (th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00 ) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24 ) : __swap32md(th->th_seq)) + (__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_len) ? (__uint16_t)(((__uint16_t)(cs ->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t )(cs->slcs_u.csu_ip.ip_len) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_len)) - cs->cs_hlen) & 0xff000000 ) >> 24) : __swap32md((__uint32_t)(__builtin_constant_p (th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00 ) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24 ) : __swap32md(th->th_seq)) + (__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_len) ? (__uint16_t)(((__uint16_t)(cs ->slcs_u.csu_ip.ip_len) & 0xffU) << 8 | ((__uint16_t )(cs->slcs_u.csu_ip.ip_len) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_len)) - cs->cs_hlen)); | |||
549 | break; | |||
550 | ||||
551 | default: | |||
552 | if (changes & NEW_U0x01) { | |||
553 | th->th_flags |= TH_URG0x20; | |||
554 | DECODEU(th->th_urp){ if (*cp == 0) { (th->th_urp) = (__uint16_t)(__builtin_constant_p ((cp[1] << 8) | cp[2]) ? (__uint16_t)(((__uint16_t)((cp [1] << 8) | cp[2]) & 0xffU) << 8 | ((__uint16_t )((cp[1] << 8) | cp[2]) & 0xff00U) >> 8) : __swap16md ((cp[1] << 8) | cp[2])); cp += 3; } else { (th->th_urp ) = (__uint16_t)(__builtin_constant_p((u_int32_t)*cp++) ? (__uint16_t )(((__uint16_t)((u_int32_t)*cp++) & 0xffU) << 8 | ( (__uint16_t)((u_int32_t)*cp++) & 0xff00U) >> 8) : __swap16md ((u_int32_t)*cp++)); } } | |||
555 | } else | |||
556 | th->th_flags &=~ TH_URG0x20; | |||
557 | if (changes & NEW_W0x02) | |||
558 | DECODES(th->th_win){ if (*cp == 0) { (th->th_win) = (__uint16_t)(__builtin_constant_p ((__uint16_t)(__builtin_constant_p(th->th_win) ? (__uint16_t )(((__uint16_t)(th->th_win) & 0xffU) << 8 | ((__uint16_t )(th->th_win) & 0xff00U) >> 8) : __swap16md(th-> th_win)) + ((cp[1] << 8) | cp[2])) ? (__uint16_t)(((__uint16_t )((__uint16_t)(__builtin_constant_p(th->th_win) ? (__uint16_t )(((__uint16_t)(th->th_win) & 0xffU) << 8 | ((__uint16_t )(th->th_win) & 0xff00U) >> 8) : __swap16md(th-> th_win)) + ((cp[1] << 8) | cp[2])) & 0xffU) << 8 | ((__uint16_t)((__uint16_t)(__builtin_constant_p(th->th_win ) ? (__uint16_t)(((__uint16_t)(th->th_win) & 0xffU) << 8 | ((__uint16_t)(th->th_win) & 0xff00U) >> 8) : __swap16md(th->th_win)) + ((cp[1] << 8) | cp[2])) & 0xff00U) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p (th->th_win) ? (__uint16_t)(((__uint16_t)(th->th_win) & 0xffU) << 8 | ((__uint16_t)(th->th_win) & 0xff00U ) >> 8) : __swap16md(th->th_win)) + ((cp[1] << 8) | cp[2]))); cp += 3; } else { (th->th_win) = (__uint16_t )(__builtin_constant_p((__uint16_t)(__builtin_constant_p(th-> th_win) ? (__uint16_t)(((__uint16_t)(th->th_win) & 0xffU ) << 8 | ((__uint16_t)(th->th_win) & 0xff00U) >> 8) : __swap16md(th->th_win)) + (u_int32_t)*cp++) ? (__uint16_t )(((__uint16_t)((__uint16_t)(__builtin_constant_p(th->th_win ) ? (__uint16_t)(((__uint16_t)(th->th_win) & 0xffU) << 8 | ((__uint16_t)(th->th_win) & 0xff00U) >> 8) : __swap16md(th->th_win)) + (u_int32_t)*cp++) & 0xffU) << 8 | ((__uint16_t)((__uint16_t)(__builtin_constant_p(th->th_win ) ? (__uint16_t)(((__uint16_t)(th->th_win) & 0xffU) << 8 | ((__uint16_t)(th->th_win) & 0xff00U) >> 8) : __swap16md(th->th_win)) + (u_int32_t)*cp++) & 0xff00U ) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p( th->th_win) ? (__uint16_t)(((__uint16_t)(th->th_win) & 0xffU) << 8 | ((__uint16_t)(th->th_win) & 0xff00U ) >> 8) : __swap16md(th->th_win)) + (u_int32_t)*cp++ )); } } | |||
559 | if (changes & NEW_A0x04) | |||
560 | DECODEL(th->th_ack){ if (*cp == 0) { (th->th_ack) = (__uint32_t)(__builtin_constant_p ((__uint32_t)(__builtin_constant_p(th->th_ack) ? (__uint32_t )(((__uint32_t)(th->th_ack) & 0xff) << 24 | ((__uint32_t )(th->th_ack) & 0xff00) << 8 | ((__uint32_t)(th-> th_ack) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack ) & 0xff000000) >> 24) : __swap32md(th->th_ack)) + ((cp[1] << 8) | cp[2])) ? (__uint32_t)(((__uint32_t) ((__uint32_t)(__builtin_constant_p(th->th_ack) ? (__uint32_t )(((__uint32_t)(th->th_ack) & 0xff) << 24 | ((__uint32_t )(th->th_ack) & 0xff00) << 8 | ((__uint32_t)(th-> th_ack) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack ) & 0xff000000) >> 24) : __swap32md(th->th_ack)) + ((cp[1] << 8) | cp[2])) & 0xff) << 24 | (( __uint32_t)((__uint32_t)(__builtin_constant_p(th->th_ack) ? (__uint32_t)(((__uint32_t)(th->th_ack) & 0xff) << 24 | ((__uint32_t)(th->th_ack) & 0xff00) << 8 | ((__uint32_t)(th->th_ack) & 0xff0000) >> 8 | (( __uint32_t)(th->th_ack) & 0xff000000) >> 24) : __swap32md (th->th_ack)) + ((cp[1] << 8) | cp[2])) & 0xff00 ) << 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p (th->th_ack) ? (__uint32_t)(((__uint32_t)(th->th_ack) & 0xff) << 24 | ((__uint32_t)(th->th_ack) & 0xff00 ) << 8 | ((__uint32_t)(th->th_ack) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack) & 0xff000000) >> 24 ) : __swap32md(th->th_ack)) + ((cp[1] << 8) | cp[2]) ) & 0xff0000) >> 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p (th->th_ack) ? (__uint32_t)(((__uint32_t)(th->th_ack) & 0xff) << 24 | ((__uint32_t)(th->th_ack) & 0xff00 ) << 8 | ((__uint32_t)(th->th_ack) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack) & 0xff000000) >> 24 ) : __swap32md(th->th_ack)) + ((cp[1] << 8) | cp[2]) ) & 0xff000000) >> 24) : __swap32md((__uint32_t)(__builtin_constant_p (th->th_ack) ? (__uint32_t)(((__uint32_t)(th->th_ack) & 0xff) << 24 | ((__uint32_t)(th->th_ack) & 0xff00 ) << 8 | ((__uint32_t)(th->th_ack) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack) & 0xff000000) >> 24 ) : __swap32md(th->th_ack)) + ((cp[1] << 8) | cp[2]) )); cp += 3; } else { (th->th_ack) = (__uint32_t)(__builtin_constant_p ((__uint32_t)(__builtin_constant_p(th->th_ack) ? (__uint32_t )(((__uint32_t)(th->th_ack) & 0xff) << 24 | ((__uint32_t )(th->th_ack) & 0xff00) << 8 | ((__uint32_t)(th-> th_ack) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack ) & 0xff000000) >> 24) : __swap32md(th->th_ack)) + (u_int32_t)*cp++) ? (__uint32_t)(((__uint32_t)((__uint32_t )(__builtin_constant_p(th->th_ack) ? (__uint32_t)(((__uint32_t )(th->th_ack) & 0xff) << 24 | ((__uint32_t)(th-> th_ack) & 0xff00) << 8 | ((__uint32_t)(th->th_ack ) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack) & 0xff000000) >> 24) : __swap32md(th->th_ack)) + (u_int32_t )*cp++) & 0xff) << 24 | ((__uint32_t)((__uint32_t)( __builtin_constant_p(th->th_ack) ? (__uint32_t)(((__uint32_t )(th->th_ack) & 0xff) << 24 | ((__uint32_t)(th-> th_ack) & 0xff00) << 8 | ((__uint32_t)(th->th_ack ) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack) & 0xff000000) >> 24) : __swap32md(th->th_ack)) + (u_int32_t )*cp++) & 0xff00) << 8 | ((__uint32_t)((__uint32_t) (__builtin_constant_p(th->th_ack) ? (__uint32_t)(((__uint32_t )(th->th_ack) & 0xff) << 24 | ((__uint32_t)(th-> th_ack) & 0xff00) << 8 | ((__uint32_t)(th->th_ack ) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack) & 0xff000000) >> 24) : __swap32md(th->th_ack)) + (u_int32_t )*cp++) & 0xff0000) >> 8 | ((__uint32_t)((__uint32_t )(__builtin_constant_p(th->th_ack) ? (__uint32_t)(((__uint32_t )(th->th_ack) & 0xff) << 24 | ((__uint32_t)(th-> th_ack) & 0xff00) << 8 | ((__uint32_t)(th->th_ack ) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack) & 0xff000000) >> 24) : __swap32md(th->th_ack)) + (u_int32_t )*cp++) & 0xff000000) >> 24) : __swap32md((__uint32_t )(__builtin_constant_p(th->th_ack) ? (__uint32_t)(((__uint32_t )(th->th_ack) & 0xff) << 24 | ((__uint32_t)(th-> th_ack) & 0xff00) << 8 | ((__uint32_t)(th->th_ack ) & 0xff0000) >> 8 | ((__uint32_t)(th->th_ack) & 0xff000000) >> 24) : __swap32md(th->th_ack)) + (u_int32_t )*cp++)); } } | |||
561 | if (changes & NEW_S0x08) | |||
562 | DECODEL(th->th_seq){ if (*cp == 0) { (th->th_seq) = (__uint32_t)(__builtin_constant_p ((__uint32_t)(__builtin_constant_p(th->th_seq) ? (__uint32_t )(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t )(th->th_seq) & 0xff00) << 8 | ((__uint32_t)(th-> th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq ) & 0xff000000) >> 24) : __swap32md(th->th_seq)) + ((cp[1] << 8) | cp[2])) ? (__uint32_t)(((__uint32_t) ((__uint32_t)(__builtin_constant_p(th->th_seq) ? (__uint32_t )(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t )(th->th_seq) & 0xff00) << 8 | ((__uint32_t)(th-> th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq ) & 0xff000000) >> 24) : __swap32md(th->th_seq)) + ((cp[1] << 8) | cp[2])) & 0xff) << 24 | (( __uint32_t)((__uint32_t)(__builtin_constant_p(th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | (( __uint32_t)(th->th_seq) & 0xff000000) >> 24) : __swap32md (th->th_seq)) + ((cp[1] << 8) | cp[2])) & 0xff00 ) << 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p (th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00 ) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24 ) : __swap32md(th->th_seq)) + ((cp[1] << 8) | cp[2]) ) & 0xff0000) >> 8 | ((__uint32_t)((__uint32_t)(__builtin_constant_p (th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00 ) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24 ) : __swap32md(th->th_seq)) + ((cp[1] << 8) | cp[2]) ) & 0xff000000) >> 24) : __swap32md((__uint32_t)(__builtin_constant_p (th->th_seq) ? (__uint32_t)(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th->th_seq) & 0xff00 ) << 8 | ((__uint32_t)(th->th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24 ) : __swap32md(th->th_seq)) + ((cp[1] << 8) | cp[2]) )); cp += 3; } else { (th->th_seq) = (__uint32_t)(__builtin_constant_p ((__uint32_t)(__builtin_constant_p(th->th_seq) ? (__uint32_t )(((__uint32_t)(th->th_seq) & 0xff) << 24 | ((__uint32_t )(th->th_seq) & 0xff00) << 8 | ((__uint32_t)(th-> th_seq) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq ) & 0xff000000) >> 24) : __swap32md(th->th_seq)) + (u_int32_t)*cp++) ? (__uint32_t)(((__uint32_t)((__uint32_t )(__builtin_constant_p(th->th_seq) ? (__uint32_t)(((__uint32_t )(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th-> th_seq) & 0xff00) << 8 | ((__uint32_t)(th->th_seq ) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24) : __swap32md(th->th_seq)) + (u_int32_t )*cp++) & 0xff) << 24 | ((__uint32_t)((__uint32_t)( __builtin_constant_p(th->th_seq) ? (__uint32_t)(((__uint32_t )(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th-> th_seq) & 0xff00) << 8 | ((__uint32_t)(th->th_seq ) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24) : __swap32md(th->th_seq)) + (u_int32_t )*cp++) & 0xff00) << 8 | ((__uint32_t)((__uint32_t) (__builtin_constant_p(th->th_seq) ? (__uint32_t)(((__uint32_t )(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th-> th_seq) & 0xff00) << 8 | ((__uint32_t)(th->th_seq ) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24) : __swap32md(th->th_seq)) + (u_int32_t )*cp++) & 0xff0000) >> 8 | ((__uint32_t)((__uint32_t )(__builtin_constant_p(th->th_seq) ? (__uint32_t)(((__uint32_t )(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th-> th_seq) & 0xff00) << 8 | ((__uint32_t)(th->th_seq ) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24) : __swap32md(th->th_seq)) + (u_int32_t )*cp++) & 0xff000000) >> 24) : __swap32md((__uint32_t )(__builtin_constant_p(th->th_seq) ? (__uint32_t)(((__uint32_t )(th->th_seq) & 0xff) << 24 | ((__uint32_t)(th-> th_seq) & 0xff00) << 8 | ((__uint32_t)(th->th_seq ) & 0xff0000) >> 8 | ((__uint32_t)(th->th_seq) & 0xff000000) >> 24) : __swap32md(th->th_seq)) + (u_int32_t )*cp++)); } } | |||
563 | break; | |||
564 | } | |||
565 | if (changes & NEW_I0x20) { | |||
566 | DECODES(cs->cs_ip.ip_id){ if (*cp == 0) { (cs->slcs_u.csu_ip.ip_id) = (__uint16_t) (__builtin_constant_p((__uint16_t)(__builtin_constant_p(cs-> slcs_u.csu_ip.ip_id) ? (__uint16_t)(((__uint16_t)(cs->slcs_u .csu_ip.ip_id) & 0xffU) << 8 | ((__uint16_t)(cs-> slcs_u.csu_ip.ip_id) & 0xff00U) >> 8) : __swap16md( cs->slcs_u.csu_ip.ip_id)) + ((cp[1] << 8) | cp[2])) ? (__uint16_t)(((__uint16_t)((__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_id) ? (__uint16_t)(((__uint16_t)(cs-> slcs_u.csu_ip.ip_id) & 0xffU) << 8 | ((__uint16_t)( cs->slcs_u.csu_ip.ip_id) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_id)) + ((cp[1] << 8) | cp[2])) & 0xffU) << 8 | ((__uint16_t)((__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_id) ? (__uint16_t)(((__uint16_t)(cs-> slcs_u.csu_ip.ip_id) & 0xffU) << 8 | ((__uint16_t)( cs->slcs_u.csu_ip.ip_id) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_id)) + ((cp[1] << 8) | cp[2])) & 0xff00U) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_id) ? (__uint16_t)(((__uint16_t)(cs-> slcs_u.csu_ip.ip_id) & 0xffU) << 8 | ((__uint16_t)( cs->slcs_u.csu_ip.ip_id) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_id)) + ((cp[1] << 8) | cp[2])) ); cp += 3; } else { (cs->slcs_u.csu_ip.ip_id) = (__uint16_t )(__builtin_constant_p((__uint16_t)(__builtin_constant_p(cs-> slcs_u.csu_ip.ip_id) ? (__uint16_t)(((__uint16_t)(cs->slcs_u .csu_ip.ip_id) & 0xffU) << 8 | ((__uint16_t)(cs-> slcs_u.csu_ip.ip_id) & 0xff00U) >> 8) : __swap16md( cs->slcs_u.csu_ip.ip_id)) + (u_int32_t)*cp++) ? (__uint16_t )(((__uint16_t)((__uint16_t)(__builtin_constant_p(cs->slcs_u .csu_ip.ip_id) ? (__uint16_t)(((__uint16_t)(cs->slcs_u.csu_ip .ip_id) & 0xffU) << 8 | ((__uint16_t)(cs->slcs_u .csu_ip.ip_id) & 0xff00U) >> 8) : __swap16md(cs-> slcs_u.csu_ip.ip_id)) + (u_int32_t)*cp++) & 0xffU) << 8 | ((__uint16_t)((__uint16_t)(__builtin_constant_p(cs->slcs_u .csu_ip.ip_id) ? (__uint16_t)(((__uint16_t)(cs->slcs_u.csu_ip .ip_id) & 0xffU) << 8 | ((__uint16_t)(cs->slcs_u .csu_ip.ip_id) & 0xff00U) >> 8) : __swap16md(cs-> slcs_u.csu_ip.ip_id)) + (u_int32_t)*cp++) & 0xff00U) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p(cs->slcs_u .csu_ip.ip_id) ? (__uint16_t)(((__uint16_t)(cs->slcs_u.csu_ip .ip_id) & 0xffU) << 8 | ((__uint16_t)(cs->slcs_u .csu_ip.ip_id) & 0xff00U) >> 8) : __swap16md(cs-> slcs_u.csu_ip.ip_id)) + (u_int32_t)*cp++)); } } | |||
567 | } else | |||
568 | cs->cs_ipslcs_u.csu_ip.ip_id = htons(ntohs(cs->cs_ip.ip_id) + 1)(__uint16_t)(__builtin_constant_p((__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_id) ? (__uint16_t)(((__uint16_t)(cs-> slcs_u.csu_ip.ip_id) & 0xffU) << 8 | ((__uint16_t)( cs->slcs_u.csu_ip.ip_id) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_id)) + 1) ? (__uint16_t)(((__uint16_t )((__uint16_t)(__builtin_constant_p(cs->slcs_u.csu_ip.ip_id ) ? (__uint16_t)(((__uint16_t)(cs->slcs_u.csu_ip.ip_id) & 0xffU) << 8 | ((__uint16_t)(cs->slcs_u.csu_ip.ip_id ) & 0xff00U) >> 8) : __swap16md(cs->slcs_u.csu_ip .ip_id)) + 1) & 0xffU) << 8 | ((__uint16_t)((__uint16_t )(__builtin_constant_p(cs->slcs_u.csu_ip.ip_id) ? (__uint16_t )(((__uint16_t)(cs->slcs_u.csu_ip.ip_id) & 0xffU) << 8 | ((__uint16_t)(cs->slcs_u.csu_ip.ip_id) & 0xff00U) >> 8) : __swap16md(cs->slcs_u.csu_ip.ip_id)) + 1) & 0xff00U) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p (cs->slcs_u.csu_ip.ip_id) ? (__uint16_t)(((__uint16_t)(cs-> slcs_u.csu_ip.ip_id) & 0xffU) << 8 | ((__uint16_t)( cs->slcs_u.csu_ip.ip_id) & 0xff00U) >> 8) : __swap16md (cs->slcs_u.csu_ip.ip_id)) + 1)); | |||
569 | ||||
570 | /* | |||
571 | * At this point, cp points to the first byte of data in the | |||
572 | * packet. Fill in the IP total length and update the IP | |||
573 | * header checksum. | |||
574 | */ | |||
575 | vjlen = cp - buf; | |||
576 | buflen -= vjlen; | |||
577 | if (buflen < 0) | |||
578 | /* we must have dropped some characters (crc should detect | |||
579 | * this but the old slip framing won't) */ | |||
580 | goto bad; | |||
581 | ||||
582 | total_len += cs->cs_hlen - vjlen; | |||
583 | cs->cs_ipslcs_u.csu_ip.ip_len = htons(total_len)(__uint16_t)(__builtin_constant_p(total_len) ? (__uint16_t)(( (__uint16_t)(total_len) & 0xffU) << 8 | ((__uint16_t )(total_len) & 0xff00U) >> 8) : __swap16md(total_len )); | |||
584 | ||||
585 | /* recompute the ip header checksum */ | |||
586 | bp = (u_int16_t *) &cs->cs_ipslcs_u.csu_ip; | |||
587 | cs->cs_ipslcs_u.csu_ip.ip_sum = 0; | |||
588 | for (changes = 0; hlen > 0; hlen -= 2) | |||
589 | changes += *bp++; | |||
590 | changes = (changes & 0xffff) + (changes >> 16); | |||
591 | changes = (changes & 0xffff) + (changes >> 16); | |||
592 | cs->cs_ipslcs_u.csu_ip.ip_sum = ~ changes; | |||
593 | ||||
594 | *hdrp = (u_char *) &cs->cs_ipslcs_u.csu_ip; | |||
595 | *hlenp = cs->cs_hlen; | |||
596 | return vjlen; | |||
597 | ||||
598 | bad: | |||
599 | comp->flags |= SLF_TOSS1; | |||
600 | INCR(sls_errorin)++comp->sls_errorin; | |||
601 | return (-1); | |||
602 | } |