1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
* OWNER 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.
*/
#ifndef _IP_FRAG_COMMON_H_
#define _IP_FRAG_COMMON_H_
#include "rte_ip_frag.h"
/* logging macros. */
#ifdef RTE_LIBRTE_IP_FRAG_DEBUG
#define IP_FRAG_LOG(lvl, fmt, args...) RTE_LOG(lvl, USER1, fmt, ##args)
#else
#define IP_FRAG_LOG(lvl, fmt, args...) do {} while(0)
#endif /* IP_FRAG_DEBUG */
#define IPV4_KEYLEN 1
#define IPV6_KEYLEN 4
/* helper macros */
#define IP_FRAG_MBUF2DR(dr, mb) ((dr)->row[(dr)->cnt++] = (mb))
#define IPv6_KEY_BYTES(key) \
(key)[0], (key)[1], (key)[2], (key)[3]
#define IPv6_KEY_BYTES_FMT \
"%08" PRIx64 "%08" PRIx64 "%08" PRIx64 "%08" PRIx64
/* internal functions declarations */
struct rte_mbuf * ip_frag_process(struct ip_frag_pkt *fp,
struct rte_ip_frag_death_row *dr, struct rte_mbuf *mb,
uint16_t ofs, uint16_t len, uint16_t more_frags);
struct ip_frag_pkt * ip_frag_find(struct rte_ip_frag_tbl *tbl,
struct rte_ip_frag_death_row *dr,
const struct ip_frag_key *key, uint64_t tms);
struct ip_frag_pkt * ip_frag_lookup(struct rte_ip_frag_tbl *tbl,
const struct ip_frag_key *key, uint64_t tms,
struct ip_frag_pkt **free, struct ip_frag_pkt **stale);
/* these functions need to be declared here as ip_frag_process relies on them */
struct rte_mbuf *ipv4_frag_reassemble(struct ip_frag_pkt *fp);
struct rte_mbuf *ipv6_frag_reassemble(struct ip_frag_pkt *fp);
/*
* misc frag key functions
*/
/* check if key is empty */
static inline int
ip_frag_key_is_empty(const struct ip_frag_key * key)
{
uint32_t i;
for (i = 0; i < RTE_MIN(key->key_len, RTE_DIM(key->src_dst)); i++)
if (key->src_dst[i] != 0)
return 0;
return 1;
}
/* empty the key */
static inline void
ip_frag_key_invalidate(struct ip_frag_key * key)
{
uint32_t i;
for (i = 0; i < key->key_len; i++)
key->src_dst[i] = 0;
}
/* compare two keys */
static inline int
ip_frag_key_cmp(const struct ip_frag_key * k1, const struct ip_frag_key * k2)
{
uint32_t i, val;
val = k1->id ^ k2->id;
for (i = 0; i < k1->key_len; i++)
val |= k1->src_dst[i] ^ k2->src_dst[i];
return val;
}
/*
* misc fragment functions
*/
/* put fragment on death row */
static inline void
ip_frag_free(struct ip_frag_pkt *fp, struct rte_ip_frag_death_row *dr)
{
uint32_t i, k;
k = dr->cnt;
for (i = 0; i != fp->last_idx; i++) {
if (fp->frags[i].mb != NULL) {
dr->row[k++] = fp->frags[i].mb;
fp->frags[i].mb = NULL;
}
}
fp->last_idx = 0;
dr->cnt = k;
}
/* delete fragment's mbufs immediately instead of using death row */
static inline void
ip_frag_free_immediate(struct ip_frag_pkt *fp)
{
uint32_t i;
for (i = 0; i < fp->last_idx; i++) {
if (fp->frags[i].mb != NULL) {
IP_FRAG_LOG(DEBUG, "%s:%d\n"
"mbuf: %p, tms: %" PRIu64", key: <%" PRIx64 ", %#x>\n",
__func__, __LINE__, fp->frags[i].mb, fp->start,
fp->key.src_dst[0], fp->key.id);
rte_pktmbuf_free(fp->frags[i].mb);
fp->frags[i].mb = NULL;
}
}
fp->last_idx = 0;
}
/* if key is empty, mark key as in use */
static inline void
ip_frag_inuse(struct rte_ip_frag_tbl *tbl, const struct ip_frag_pkt *fp)
{
if (ip_frag_key_is_empty(&fp->key)) {
TAILQ_REMOVE(&tbl->lru, fp, lru);
tbl->use_entries--;
}
}
/* reset the fragment */
static inline void
ip_frag_reset(struct ip_frag_pkt *fp, uint64_t tms)
{
static const struct ip_frag zero_frag = {
.ofs = 0,
.len = 0,
.mb = NULL,
};
fp->start = tms;
fp->total_size = UINT32_MAX;
fp->frag_size = 0;
fp->last_idx = IP_MIN_FRAG_NUM;
fp->frags[IP_LAST_FRAG_IDX] = zero_frag;
fp->frags[IP_FIRST_FRAG_IDX] = zero_frag;
}
#endif /* _IP_FRAG_COMMON_H_ */
|
