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Vector Packet Processing
packet.h
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1 /*
2  * Copyright (c) 2015 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 /*
16  * ethernet/packet.h: ethernet packet format.
17  *
18  * Copyright (c) 2008 Eliot Dresselhaus
19  *
20  * Permission is hereby granted, free of charge, to any person obtaining
21  * a copy of this software and associated documentation files (the
22  * "Software"), to deal in the Software without restriction, including
23  * without limitation the rights to use, copy, modify, merge, publish,
24  * distribute, sublicense, and/or sell copies of the Software, and to
25  * permit persons to whom the Software is furnished to do so, subject to
26  * the following conditions:
27  *
28  * The above copyright notice and this permission notice shall be
29  * included in all copies or substantial portions of the Software.
30  *
31  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38  */
39 
40 #ifndef included_ethernet_packet_h
41 #define included_ethernet_packet_h
42 
43 #include <vnet/interface.h>
44 
45 typedef enum
46 {
47 #define ethernet_type(n,s) ETHERNET_TYPE_##s = n,
48 #include <vnet/ethernet/types.def>
49 #undef ethernet_type
51 
52 typedef struct
53 {
54  /* Source/destination address. */
55  u8 dst_address[6];
57 
58  /* Ethernet type. */
61 
62 #define ETHERNET_ADDRESS_UNICAST 0
63 #define ETHERNET_ADDRESS_MULTICAST 1
64 
65 /* I/G bit: individual (unicast)/group (broadcast/multicast). */
68 {
69  return (a[0] >> 0) & 1;
70 }
71 
72 always_inline int
74 {
75  return clib_mem_unaligned (a, u32) == 0xffffffff &&
76  clib_mem_unaligned (a + 4, u16) == 0xffff;
77 }
78 
81 {
82  return (a[0] >> 1) & 1;
83 }
84 
85 always_inline void
87 {
88  a[0] |= 1 << 1;
89 }
90 
91 always_inline int
93 {
96  {
98  }
100  {
102  }
103  else
104  {
106  }
107 }
108 
109 always_inline int
111 {
114  {
116  }
118  {
120  }
121  else
122  {
124  }
125 }
126 
127 /* For VLAN ethernet type. */
128 typedef struct
129 {
130  /* 3 bit priority, 1 bit CFI and 12 bit vlan id. */
132 
133 #define ETHERNET_N_VLAN (1 << 12)
134 
135  /* Inner ethernet type. */
138 
139 always_inline void
141  u8 prio)
142 {
143  u8 *bytes = (u8 *) (&h->priority_cfi_and_id);
144 
145  bytes[0] &= 0x0f;
146  bytes[0] |= (prio & 0xf) << 4;
147 }
148 
151 {
152  u8 *bytes = (u8 *) (&h->priority_cfi_and_id);
153 
154  return (bytes[0] >> 4);
155 }
156 
157 /* VLAN with ethertype first and vlan id second */
158 typedef struct
159 {
160  /* vlan type */
162 
163  /* 3 bit priority, 1 bit CFI and 12 bit vlan id. */
166 
167 /* PBB header with B-TAG - backbone VLAN indicator and I-TAG - service encapsulation */
168 typedef struct
169 {
170  /* Backbone source/destination address. */
171  u8 b_dst_address[6];
172  u8 b_src_address[6];
173 
174  /* B-tag */
176  /* 3 bit priority, 1 bit DEI and 12 bit vlan id */
178 
179  /* I-tag */
181  /* 3 bit priority, 1 bit DEI, 1 bit UCA, 3 bit RES and 24 bit I_SID (service identifier) */
183 
184 #define ETHERNET_N_PBB (1 << 24)
186 
187 /* *INDENT-OFF* */
188 typedef CLIB_PACKED (struct
189 {
190  /* Backbone source/destination address. */
191  u8 b_dst_address[6];
192  u8 b_src_address[6];
193 
194  /* B-tag */
195  u16 b_type;
196  /* 3 bit priority, 1 bit DEI and 12 bit vlan id */
197  u16 priority_dei_id;
198 
199  /* I-tag */
200  u16 i_type;
201  /* 3 bit priority, 1 bit DEI, 1 bit UCA, 3 bit RES and 24 bit I_SID (service identifier) */
202  u32 priority_dei_uca_res_sid;
203 }) ethernet_pbb_header_packed_t;
204 /* *INDENT-ON* */
205 
206 #endif /* included_ethernet_packet_h */
207 
208 /*
209  * fd.io coding-style-patch-verification: ON
210  *
211  * Local Variables:
212  * eval: (c-set-style "gnu")
213  * End:
214  */
a
Definition: bitmap.h:538
static int ethernet_address_is_broadcast(u8 *a)
Definition: packet.h:73
#define PREDICT_TRUE(x)
Definition: clib.h:112
ethernet_type_t
Definition: packet.h:45
unsigned char u8
Definition: types.h:56
static uword ethernet_address_is_locally_administered(u8 *a)
Definition: packet.h:80
static int eh_dst_addr_to_rx_ctype(ethernet_header_t *eh)
Definition: packet.h:92
static uword ethernet_address_cast(u8 *a)
Definition: packet.h:67
#define always_inline
Definition: clib.h:98
u8 dst_address[6]
Definition: packet.h:55
unsigned int u32
Definition: types.h:88
static void ethernet_vlan_header_set_priority_net_order(ethernet_vlan_header_t *h, u8 prio)
Definition: packet.h:140
static void ethernet_address_set_locally_administered(u8 *a)
Definition: packet.h:86
unsigned short u16
Definition: types.h:57
vl_api_address_union_t src_address
Definition: ip_types.api:97
static int eh_dst_addr_to_tx_ctype(ethernet_header_t *eh)
Definition: packet.h:110
#define clib_mem_unaligned(pointer, type)
Definition: types.h:155
u64 uword
Definition: types.h:112
typedef CLIB_PACKED(struct { u8 b_dst_address[6];u8 b_src_address[6];u16 b_type;u16 priority_dei_id;u16 i_type;u32 priority_dei_uca_res_sid;}) ethernet_pbb_header_packed_t
static u8 ethernet_vlan_header_get_priority_net_order(ethernet_vlan_header_t *h)
Definition: packet.h:150
#define ETHERNET_ADDRESS_UNICAST
Definition: packet.h:62
u32 priority_dei_uca_res_sid
Definition: packet.h:182