Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. |
Roland Dreier | 2a1d9b7 | 2005-08-10 23:03:10 -0700 | [diff] [blame] | 3 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the |
| 9 | * OpenIB.org BSD license below: |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or |
| 12 | * without modification, are permitted provided that the following |
| 13 | * conditions are met: |
| 14 | * |
| 15 | * - Redistributions of source code must retain the above |
| 16 | * copyright notice, this list of conditions and the following |
| 17 | * disclaimer. |
| 18 | * |
| 19 | * - Redistributions in binary form must reproduce the above |
| 20 | * copyright notice, this list of conditions and the following |
| 21 | * disclaimer in the documentation and/or other materials |
| 22 | * provided with the distribution. |
| 23 | * |
| 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 31 | * SOFTWARE. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | */ |
| 33 | |
| 34 | #include <linux/errno.h> |
Tim Schmielau | 8c65b4a | 2005-11-07 00:59:43 -0800 | [diff] [blame] | 35 | #include <linux/string.h> |
Paul Gortmaker | b108d97 | 2011-05-27 15:29:33 -0400 | [diff] [blame] | 36 | #include <linux/export.h> |
Eli Cohen | af7bd46 | 2010-08-26 17:18:59 +0300 | [diff] [blame] | 37 | #include <linux/if_ether.h> |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 38 | #include <linux/ip.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Roland Dreier | a4d61e8 | 2005-08-25 13:40:04 -0700 | [diff] [blame] | 40 | #include <rdma/ib_pack.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | #define STRUCT_FIELD(header, field) \ |
| 43 | .struct_offset_bytes = offsetof(struct ib_unpacked_ ## header, field), \ |
| 44 | .struct_size_bytes = sizeof ((struct ib_unpacked_ ## header *) 0)->field, \ |
| 45 | .field_name = #header ":" #field |
| 46 | |
| 47 | static const struct ib_field lrh_table[] = { |
| 48 | { STRUCT_FIELD(lrh, virtual_lane), |
| 49 | .offset_words = 0, |
| 50 | .offset_bits = 0, |
| 51 | .size_bits = 4 }, |
| 52 | { STRUCT_FIELD(lrh, link_version), |
| 53 | .offset_words = 0, |
| 54 | .offset_bits = 4, |
| 55 | .size_bits = 4 }, |
| 56 | { STRUCT_FIELD(lrh, service_level), |
| 57 | .offset_words = 0, |
| 58 | .offset_bits = 8, |
| 59 | .size_bits = 4 }, |
| 60 | { RESERVED, |
| 61 | .offset_words = 0, |
| 62 | .offset_bits = 12, |
| 63 | .size_bits = 2 }, |
| 64 | { STRUCT_FIELD(lrh, link_next_header), |
| 65 | .offset_words = 0, |
| 66 | .offset_bits = 14, |
| 67 | .size_bits = 2 }, |
| 68 | { STRUCT_FIELD(lrh, destination_lid), |
| 69 | .offset_words = 0, |
| 70 | .offset_bits = 16, |
| 71 | .size_bits = 16 }, |
| 72 | { RESERVED, |
| 73 | .offset_words = 1, |
| 74 | .offset_bits = 0, |
| 75 | .size_bits = 5 }, |
| 76 | { STRUCT_FIELD(lrh, packet_length), |
| 77 | .offset_words = 1, |
| 78 | .offset_bits = 5, |
| 79 | .size_bits = 11 }, |
| 80 | { STRUCT_FIELD(lrh, source_lid), |
| 81 | .offset_words = 1, |
| 82 | .offset_bits = 16, |
| 83 | .size_bits = 16 } |
| 84 | }; |
| 85 | |
Eli Cohen | ff7f5aa | 2010-08-26 14:17:56 +0000 | [diff] [blame] | 86 | static const struct ib_field eth_table[] = { |
| 87 | { STRUCT_FIELD(eth, dmac_h), |
| 88 | .offset_words = 0, |
| 89 | .offset_bits = 0, |
| 90 | .size_bits = 32 }, |
| 91 | { STRUCT_FIELD(eth, dmac_l), |
| 92 | .offset_words = 1, |
| 93 | .offset_bits = 0, |
| 94 | .size_bits = 16 }, |
| 95 | { STRUCT_FIELD(eth, smac_h), |
| 96 | .offset_words = 1, |
| 97 | .offset_bits = 16, |
| 98 | .size_bits = 16 }, |
| 99 | { STRUCT_FIELD(eth, smac_l), |
| 100 | .offset_words = 2, |
| 101 | .offset_bits = 0, |
| 102 | .size_bits = 32 }, |
| 103 | { STRUCT_FIELD(eth, type), |
| 104 | .offset_words = 3, |
| 105 | .offset_bits = 0, |
| 106 | .size_bits = 16 } |
| 107 | }; |
| 108 | |
Eli Cohen | af7bd46 | 2010-08-26 17:18:59 +0300 | [diff] [blame] | 109 | static const struct ib_field vlan_table[] = { |
| 110 | { STRUCT_FIELD(vlan, tag), |
| 111 | .offset_words = 0, |
| 112 | .offset_bits = 0, |
| 113 | .size_bits = 16 }, |
| 114 | { STRUCT_FIELD(vlan, type), |
| 115 | .offset_words = 0, |
| 116 | .offset_bits = 16, |
| 117 | .size_bits = 16 } |
| 118 | }; |
| 119 | |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 120 | static const struct ib_field ip4_table[] = { |
| 121 | { STRUCT_FIELD(ip4, ver), |
| 122 | .offset_words = 0, |
| 123 | .offset_bits = 0, |
| 124 | .size_bits = 4 }, |
| 125 | { STRUCT_FIELD(ip4, hdr_len), |
| 126 | .offset_words = 0, |
| 127 | .offset_bits = 4, |
| 128 | .size_bits = 4 }, |
| 129 | { STRUCT_FIELD(ip4, tos), |
| 130 | .offset_words = 0, |
| 131 | .offset_bits = 8, |
| 132 | .size_bits = 8 }, |
| 133 | { STRUCT_FIELD(ip4, tot_len), |
| 134 | .offset_words = 0, |
| 135 | .offset_bits = 16, |
| 136 | .size_bits = 16 }, |
| 137 | { STRUCT_FIELD(ip4, id), |
| 138 | .offset_words = 1, |
| 139 | .offset_bits = 0, |
| 140 | .size_bits = 16 }, |
| 141 | { STRUCT_FIELD(ip4, frag_off), |
| 142 | .offset_words = 1, |
| 143 | .offset_bits = 16, |
| 144 | .size_bits = 16 }, |
| 145 | { STRUCT_FIELD(ip4, ttl), |
| 146 | .offset_words = 2, |
| 147 | .offset_bits = 0, |
| 148 | .size_bits = 8 }, |
| 149 | { STRUCT_FIELD(ip4, protocol), |
| 150 | .offset_words = 2, |
| 151 | .offset_bits = 8, |
| 152 | .size_bits = 8 }, |
| 153 | { STRUCT_FIELD(ip4, check), |
| 154 | .offset_words = 2, |
| 155 | .offset_bits = 16, |
| 156 | .size_bits = 16 }, |
| 157 | { STRUCT_FIELD(ip4, saddr), |
| 158 | .offset_words = 3, |
| 159 | .offset_bits = 0, |
| 160 | .size_bits = 32 }, |
| 161 | { STRUCT_FIELD(ip4, daddr), |
| 162 | .offset_words = 4, |
| 163 | .offset_bits = 0, |
| 164 | .size_bits = 32 } |
| 165 | }; |
| 166 | |
| 167 | static const struct ib_field udp_table[] = { |
| 168 | { STRUCT_FIELD(udp, sport), |
| 169 | .offset_words = 0, |
| 170 | .offset_bits = 0, |
| 171 | .size_bits = 16 }, |
| 172 | { STRUCT_FIELD(udp, dport), |
| 173 | .offset_words = 0, |
| 174 | .offset_bits = 16, |
| 175 | .size_bits = 16 }, |
| 176 | { STRUCT_FIELD(udp, length), |
| 177 | .offset_words = 1, |
| 178 | .offset_bits = 0, |
| 179 | .size_bits = 16 }, |
| 180 | { STRUCT_FIELD(udp, csum), |
| 181 | .offset_words = 1, |
| 182 | .offset_bits = 16, |
| 183 | .size_bits = 16 } |
| 184 | }; |
| 185 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | static const struct ib_field grh_table[] = { |
| 187 | { STRUCT_FIELD(grh, ip_version), |
| 188 | .offset_words = 0, |
| 189 | .offset_bits = 0, |
| 190 | .size_bits = 4 }, |
| 191 | { STRUCT_FIELD(grh, traffic_class), |
| 192 | .offset_words = 0, |
| 193 | .offset_bits = 4, |
| 194 | .size_bits = 8 }, |
| 195 | { STRUCT_FIELD(grh, flow_label), |
| 196 | .offset_words = 0, |
| 197 | .offset_bits = 12, |
| 198 | .size_bits = 20 }, |
| 199 | { STRUCT_FIELD(grh, payload_length), |
| 200 | .offset_words = 1, |
| 201 | .offset_bits = 0, |
| 202 | .size_bits = 16 }, |
| 203 | { STRUCT_FIELD(grh, next_header), |
| 204 | .offset_words = 1, |
| 205 | .offset_bits = 16, |
| 206 | .size_bits = 8 }, |
| 207 | { STRUCT_FIELD(grh, hop_limit), |
| 208 | .offset_words = 1, |
| 209 | .offset_bits = 24, |
| 210 | .size_bits = 8 }, |
| 211 | { STRUCT_FIELD(grh, source_gid), |
| 212 | .offset_words = 2, |
| 213 | .offset_bits = 0, |
| 214 | .size_bits = 128 }, |
| 215 | { STRUCT_FIELD(grh, destination_gid), |
| 216 | .offset_words = 6, |
| 217 | .offset_bits = 0, |
| 218 | .size_bits = 128 } |
| 219 | }; |
| 220 | |
| 221 | static const struct ib_field bth_table[] = { |
| 222 | { STRUCT_FIELD(bth, opcode), |
| 223 | .offset_words = 0, |
| 224 | .offset_bits = 0, |
| 225 | .size_bits = 8 }, |
| 226 | { STRUCT_FIELD(bth, solicited_event), |
| 227 | .offset_words = 0, |
| 228 | .offset_bits = 8, |
| 229 | .size_bits = 1 }, |
| 230 | { STRUCT_FIELD(bth, mig_req), |
| 231 | .offset_words = 0, |
| 232 | .offset_bits = 9, |
| 233 | .size_bits = 1 }, |
| 234 | { STRUCT_FIELD(bth, pad_count), |
| 235 | .offset_words = 0, |
| 236 | .offset_bits = 10, |
| 237 | .size_bits = 2 }, |
| 238 | { STRUCT_FIELD(bth, transport_header_version), |
| 239 | .offset_words = 0, |
| 240 | .offset_bits = 12, |
| 241 | .size_bits = 4 }, |
| 242 | { STRUCT_FIELD(bth, pkey), |
| 243 | .offset_words = 0, |
| 244 | .offset_bits = 16, |
| 245 | .size_bits = 16 }, |
| 246 | { RESERVED, |
| 247 | .offset_words = 1, |
| 248 | .offset_bits = 0, |
| 249 | .size_bits = 8 }, |
| 250 | { STRUCT_FIELD(bth, destination_qpn), |
| 251 | .offset_words = 1, |
| 252 | .offset_bits = 8, |
| 253 | .size_bits = 24 }, |
| 254 | { STRUCT_FIELD(bth, ack_req), |
| 255 | .offset_words = 2, |
| 256 | .offset_bits = 0, |
| 257 | .size_bits = 1 }, |
| 258 | { RESERVED, |
| 259 | .offset_words = 2, |
| 260 | .offset_bits = 1, |
| 261 | .size_bits = 7 }, |
| 262 | { STRUCT_FIELD(bth, psn), |
| 263 | .offset_words = 2, |
| 264 | .offset_bits = 8, |
| 265 | .size_bits = 24 } |
| 266 | }; |
| 267 | |
| 268 | static const struct ib_field deth_table[] = { |
| 269 | { STRUCT_FIELD(deth, qkey), |
| 270 | .offset_words = 0, |
| 271 | .offset_bits = 0, |
| 272 | .size_bits = 32 }, |
| 273 | { RESERVED, |
| 274 | .offset_words = 1, |
| 275 | .offset_bits = 0, |
| 276 | .size_bits = 8 }, |
| 277 | { STRUCT_FIELD(deth, source_qpn), |
| 278 | .offset_words = 1, |
| 279 | .offset_bits = 8, |
| 280 | .size_bits = 24 } |
| 281 | }; |
| 282 | |
Moni Shoua | 3ef967a | 2016-01-14 17:50:41 +0200 | [diff] [blame] | 283 | __sum16 ib_ud_ip4_csum(struct ib_ud_header *header) |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 284 | { |
| 285 | struct iphdr iph; |
| 286 | |
| 287 | iph.ihl = 5; |
| 288 | iph.version = 4; |
| 289 | iph.tos = header->ip4.tos; |
| 290 | iph.tot_len = header->ip4.tot_len; |
| 291 | iph.id = header->ip4.id; |
| 292 | iph.frag_off = header->ip4.frag_off; |
| 293 | iph.ttl = header->ip4.ttl; |
| 294 | iph.protocol = header->ip4.protocol; |
| 295 | iph.check = 0; |
| 296 | iph.saddr = header->ip4.saddr; |
| 297 | iph.daddr = header->ip4.daddr; |
| 298 | |
| 299 | return ip_fast_csum((u8 *)&iph, iph.ihl); |
| 300 | } |
| 301 | EXPORT_SYMBOL(ib_ud_ip4_csum); |
| 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | /** |
| 304 | * ib_ud_header_init - Initialize UD header structure |
| 305 | * @payload_bytes:Length of packet payload |
Eli Cohen | ff7f5aa | 2010-08-26 14:17:56 +0000 | [diff] [blame] | 306 | * @lrh_present: specify if LRH is present |
| 307 | * @eth_present: specify if Eth header is present |
Eli Cohen | af7bd46 | 2010-08-26 17:18:59 +0300 | [diff] [blame] | 308 | * @vlan_present: packet is tagged vlan |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 309 | * @grh_present: GRH flag (if non-zero, GRH will be included) |
| 310 | * @ip_version: if non-zero, IP header, V4 or V6, will be included |
| 311 | * @udp_present :if non-zero, UDP header will be included |
Eli Cohen | ff7f5aa | 2010-08-26 14:17:56 +0000 | [diff] [blame] | 312 | * @immediate_present: specify if immediate data is present |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | * @header:Structure to initialize |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | */ |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 315 | int ib_ud_header_init(int payload_bytes, |
| 316 | int lrh_present, |
| 317 | int eth_present, |
| 318 | int vlan_present, |
| 319 | int grh_present, |
| 320 | int ip_version, |
| 321 | int udp_present, |
| 322 | int immediate_present, |
| 323 | struct ib_ud_header *header) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | { |
Moni Shoua | 1c5e0809 | 2016-01-28 17:51:50 +0200 | [diff] [blame] | 325 | size_t udp_bytes = udp_present ? IB_UDP_BYTES : 0; |
| 326 | |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 327 | grh_present = grh_present && !ip_version; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | memset(header, 0, sizeof *header); |
| 329 | |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 330 | /* |
| 331 | * UDP header without IP header doesn't make sense |
| 332 | */ |
| 333 | if (udp_present && ip_version != 4 && ip_version != 6) |
| 334 | return -EINVAL; |
| 335 | |
Eli Cohen | ff7f5aa | 2010-08-26 14:17:56 +0000 | [diff] [blame] | 336 | if (lrh_present) { |
| 337 | u16 packet_length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
Eli Cohen | ff7f5aa | 2010-08-26 14:17:56 +0000 | [diff] [blame] | 339 | header->lrh.link_version = 0; |
| 340 | header->lrh.link_next_header = |
| 341 | grh_present ? IB_LNH_IBA_GLOBAL : IB_LNH_IBA_LOCAL; |
| 342 | packet_length = (IB_LRH_BYTES + |
| 343 | IB_BTH_BYTES + |
| 344 | IB_DETH_BYTES + |
| 345 | (grh_present ? IB_GRH_BYTES : 0) + |
| 346 | payload_bytes + |
| 347 | 4 + /* ICRC */ |
| 348 | 3) / 4; /* round up */ |
| 349 | header->lrh.packet_length = cpu_to_be16(packet_length); |
| 350 | } |
| 351 | |
Eli Cohen | af7bd46 | 2010-08-26 17:18:59 +0300 | [diff] [blame] | 352 | if (vlan_present) |
| 353 | header->eth.type = cpu_to_be16(ETH_P_8021Q); |
| 354 | |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 355 | if (ip_version == 6 || grh_present) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | header->grh.ip_version = 6; |
| 357 | header->grh.payload_length = |
Moni Shoua | 1c5e0809 | 2016-01-28 17:51:50 +0200 | [diff] [blame] | 358 | cpu_to_be16((udp_bytes + |
| 359 | IB_BTH_BYTES + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | IB_DETH_BYTES + |
| 361 | payload_bytes + |
| 362 | 4 + /* ICRC */ |
| 363 | 3) & ~3); /* round up */ |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 364 | header->grh.next_header = udp_present ? IPPROTO_UDP : 0x1b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | } |
| 366 | |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 367 | if (ip_version == 4) { |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 368 | header->ip4.ver = 4; /* version 4 */ |
| 369 | header->ip4.hdr_len = 5; /* 5 words */ |
| 370 | header->ip4.tot_len = |
| 371 | cpu_to_be16(IB_IP4_BYTES + |
| 372 | udp_bytes + |
| 373 | IB_BTH_BYTES + |
| 374 | IB_DETH_BYTES + |
| 375 | payload_bytes + |
| 376 | 4); /* ICRC */ |
| 377 | header->ip4.protocol = IPPROTO_UDP; |
| 378 | } |
| 379 | if (udp_present && ip_version) |
| 380 | header->udp.length = |
| 381 | cpu_to_be16(IB_UDP_BYTES + |
| 382 | IB_BTH_BYTES + |
| 383 | IB_DETH_BYTES + |
| 384 | payload_bytes + |
| 385 | 4); /* ICRC */ |
| 386 | |
Eli Cohen | 920d706 | 2010-02-08 11:40:37 +0000 | [diff] [blame] | 387 | if (immediate_present) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | header->bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE; |
| 389 | else |
| 390 | header->bth.opcode = IB_OPCODE_UD_SEND_ONLY; |
| 391 | header->bth.pad_count = (4 - payload_bytes) & 3; |
| 392 | header->bth.transport_header_version = 0; |
Eli Cohen | ff7f5aa | 2010-08-26 14:17:56 +0000 | [diff] [blame] | 393 | |
| 394 | header->lrh_present = lrh_present; |
| 395 | header->eth_present = eth_present; |
Eli Cohen | af7bd46 | 2010-08-26 17:18:59 +0300 | [diff] [blame] | 396 | header->vlan_present = vlan_present; |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 397 | header->grh_present = grh_present || (ip_version == 6); |
| 398 | header->ipv4_present = ip_version == 4; |
| 399 | header->udp_present = udp_present; |
Eli Cohen | ff7f5aa | 2010-08-26 14:17:56 +0000 | [diff] [blame] | 400 | header->immediate_present = immediate_present; |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 401 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | } |
| 403 | EXPORT_SYMBOL(ib_ud_header_init); |
| 404 | |
| 405 | /** |
| 406 | * ib_ud_header_pack - Pack UD header struct into wire format |
| 407 | * @header:UD header struct |
| 408 | * @buf:Buffer to pack into |
| 409 | * |
| 410 | * ib_ud_header_pack() packs the UD header structure @header into wire |
| 411 | * format in the buffer @buf. |
| 412 | */ |
| 413 | int ib_ud_header_pack(struct ib_ud_header *header, |
| 414 | void *buf) |
| 415 | { |
| 416 | int len = 0; |
| 417 | |
Eli Cohen | ff7f5aa | 2010-08-26 14:17:56 +0000 | [diff] [blame] | 418 | if (header->lrh_present) { |
| 419 | ib_pack(lrh_table, ARRAY_SIZE(lrh_table), |
| 420 | &header->lrh, buf + len); |
| 421 | len += IB_LRH_BYTES; |
| 422 | } |
| 423 | if (header->eth_present) { |
| 424 | ib_pack(eth_table, ARRAY_SIZE(eth_table), |
| 425 | &header->eth, buf + len); |
| 426 | len += IB_ETH_BYTES; |
| 427 | } |
Eli Cohen | af7bd46 | 2010-08-26 17:18:59 +0300 | [diff] [blame] | 428 | if (header->vlan_present) { |
| 429 | ib_pack(vlan_table, ARRAY_SIZE(vlan_table), |
| 430 | &header->vlan, buf + len); |
| 431 | len += IB_VLAN_BYTES; |
| 432 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | if (header->grh_present) { |
| 434 | ib_pack(grh_table, ARRAY_SIZE(grh_table), |
| 435 | &header->grh, buf + len); |
| 436 | len += IB_GRH_BYTES; |
| 437 | } |
Moni Shoua | 25f4022 | 2015-12-23 14:56:56 +0200 | [diff] [blame] | 438 | if (header->ipv4_present) { |
| 439 | ib_pack(ip4_table, ARRAY_SIZE(ip4_table), |
| 440 | &header->ip4, buf + len); |
| 441 | len += IB_IP4_BYTES; |
| 442 | } |
| 443 | if (header->udp_present) { |
| 444 | ib_pack(udp_table, ARRAY_SIZE(udp_table), |
| 445 | &header->udp, buf + len); |
| 446 | len += IB_UDP_BYTES; |
| 447 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | |
| 449 | ib_pack(bth_table, ARRAY_SIZE(bth_table), |
| 450 | &header->bth, buf + len); |
| 451 | len += IB_BTH_BYTES; |
| 452 | |
| 453 | ib_pack(deth_table, ARRAY_SIZE(deth_table), |
| 454 | &header->deth, buf + len); |
| 455 | len += IB_DETH_BYTES; |
| 456 | |
| 457 | if (header->immediate_present) { |
| 458 | memcpy(buf + len, &header->immediate_data, sizeof header->immediate_data); |
| 459 | len += sizeof header->immediate_data; |
| 460 | } |
| 461 | |
| 462 | return len; |
| 463 | } |
| 464 | EXPORT_SYMBOL(ib_ud_header_pack); |
| 465 | |
| 466 | /** |
| 467 | * ib_ud_header_unpack - Unpack UD header struct from wire format |
| 468 | * @header:UD header struct |
| 469 | * @buf:Buffer to pack into |
| 470 | * |
| 471 | * ib_ud_header_pack() unpacks the UD header structure @header from wire |
| 472 | * format in the buffer @buf. |
| 473 | */ |
| 474 | int ib_ud_header_unpack(void *buf, |
| 475 | struct ib_ud_header *header) |
| 476 | { |
| 477 | ib_unpack(lrh_table, ARRAY_SIZE(lrh_table), |
| 478 | buf, &header->lrh); |
| 479 | buf += IB_LRH_BYTES; |
| 480 | |
| 481 | if (header->lrh.link_version != 0) { |
Parav Pandit | aba25a3e | 2016-03-02 00:50:29 +0530 | [diff] [blame] | 482 | pr_warn("Invalid LRH.link_version %d\n", |
| 483 | header->lrh.link_version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | return -EINVAL; |
| 485 | } |
| 486 | |
| 487 | switch (header->lrh.link_next_header) { |
| 488 | case IB_LNH_IBA_LOCAL: |
| 489 | header->grh_present = 0; |
| 490 | break; |
| 491 | |
| 492 | case IB_LNH_IBA_GLOBAL: |
| 493 | header->grh_present = 1; |
| 494 | ib_unpack(grh_table, ARRAY_SIZE(grh_table), |
| 495 | buf, &header->grh); |
| 496 | buf += IB_GRH_BYTES; |
| 497 | |
| 498 | if (header->grh.ip_version != 6) { |
Parav Pandit | aba25a3e | 2016-03-02 00:50:29 +0530 | [diff] [blame] | 499 | pr_warn("Invalid GRH.ip_version %d\n", |
| 500 | header->grh.ip_version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | return -EINVAL; |
| 502 | } |
| 503 | if (header->grh.next_header != 0x1b) { |
Parav Pandit | aba25a3e | 2016-03-02 00:50:29 +0530 | [diff] [blame] | 504 | pr_warn("Invalid GRH.next_header 0x%02x\n", |
| 505 | header->grh.next_header); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | return -EINVAL; |
| 507 | } |
| 508 | break; |
| 509 | |
| 510 | default: |
Parav Pandit | aba25a3e | 2016-03-02 00:50:29 +0530 | [diff] [blame] | 511 | pr_warn("Invalid LRH.link_next_header %d\n", |
| 512 | header->lrh.link_next_header); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | return -EINVAL; |
| 514 | } |
| 515 | |
| 516 | ib_unpack(bth_table, ARRAY_SIZE(bth_table), |
| 517 | buf, &header->bth); |
| 518 | buf += IB_BTH_BYTES; |
| 519 | |
| 520 | switch (header->bth.opcode) { |
| 521 | case IB_OPCODE_UD_SEND_ONLY: |
| 522 | header->immediate_present = 0; |
| 523 | break; |
| 524 | case IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE: |
| 525 | header->immediate_present = 1; |
| 526 | break; |
| 527 | default: |
Parav Pandit | aba25a3e | 2016-03-02 00:50:29 +0530 | [diff] [blame] | 528 | pr_warn("Invalid BTH.opcode 0x%02x\n", header->bth.opcode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | return -EINVAL; |
| 530 | } |
| 531 | |
| 532 | if (header->bth.transport_header_version != 0) { |
Parav Pandit | aba25a3e | 2016-03-02 00:50:29 +0530 | [diff] [blame] | 533 | pr_warn("Invalid BTH.transport_header_version %d\n", |
| 534 | header->bth.transport_header_version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | return -EINVAL; |
| 536 | } |
| 537 | |
| 538 | ib_unpack(deth_table, ARRAY_SIZE(deth_table), |
| 539 | buf, &header->deth); |
| 540 | buf += IB_DETH_BYTES; |
| 541 | |
| 542 | if (header->immediate_present) |
| 543 | memcpy(&header->immediate_data, buf, sizeof header->immediate_data); |
| 544 | |
| 545 | return 0; |
| 546 | } |
| 547 | EXPORT_SYMBOL(ib_ud_header_unpack); |