1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 1982, 1986, 1990, 1993
3 * The Regents of the University of California.
4 * Copyright(c) 2010-2014 Intel Corporation.
5 * Copyright(c) 2014 6WIND S.A.
20 #ifdef RTE_EXEC_ENV_WINDOWS
23 #include <sys/socket.h>
24 #include <sys/types.h>
25 #include <netinet/in.h>
26 #include <arpa/inet.h>
27 #include <netinet/ip.h>
28 #include <netinet/ip6.h>
31 #include <rte_byteorder.h>
42 uint8_t version_ihl; /**< version and header length */
43 uint8_t type_of_service; /**< type of service */
44 rte_be16_t total_length; /**< length of packet */
45 rte_be16_t packet_id; /**< packet ID */
46 rte_be16_t fragment_offset; /**< fragmentation offset */
47 uint8_t time_to_live; /**< time to live */
48 uint8_t next_proto_id; /**< protocol ID */
49 rte_be16_t hdr_checksum; /**< header checksum */
50 rte_be32_t src_addr; /**< source address */
51 rte_be32_t dst_addr; /**< destination address */
54 /** Create IPv4 address */
55 #define RTE_IPV4(a, b, c, d) ((uint32_t)(((a) & 0xff) << 24) | \
56 (((b) & 0xff) << 16) | \
57 (((c) & 0xff) << 8) | \
60 /** Maximal IPv4 packet length (including a header) */
61 #define RTE_IPV4_MAX_PKT_LEN 65535
63 /** Internet header length mask for version_ihl field */
64 #define RTE_IPV4_HDR_IHL_MASK (0x0f)
66 * Internet header length field multiplier (IHL field specifies overall header
67 * length in number of 4-byte words)
69 #define RTE_IPV4_IHL_MULTIPLIER (4)
71 /* Type of Service fields */
72 #define RTE_IPV4_HDR_DSCP_MASK (0xfc)
73 #define RTE_IPV4_HDR_ECN_MASK (0x03)
74 #define RTE_IPV4_HDR_ECN_CE RTE_IPV4_HDR_ECN_MASK
76 /* Fragment Offset * Flags. */
77 #define RTE_IPV4_HDR_DF_SHIFT 14
78 #define RTE_IPV4_HDR_MF_SHIFT 13
79 #define RTE_IPV4_HDR_FO_SHIFT 3
81 #define RTE_IPV4_HDR_DF_FLAG (1 << RTE_IPV4_HDR_DF_SHIFT)
82 #define RTE_IPV4_HDR_MF_FLAG (1 << RTE_IPV4_HDR_MF_SHIFT)
84 #define RTE_IPV4_HDR_OFFSET_MASK ((1 << RTE_IPV4_HDR_MF_SHIFT) - 1)
86 #define RTE_IPV4_HDR_OFFSET_UNITS 8
91 #define RTE_IPV4_ANY ((uint32_t)0x00000000) /**< 0.0.0.0 */
92 #define RTE_IPV4_LOOPBACK ((uint32_t)0x7f000001) /**< 127.0.0.1 */
93 #define RTE_IPV4_BROADCAST ((uint32_t)0xe0000000) /**< 224.0.0.0 */
94 #define RTE_IPV4_ALLHOSTS_GROUP ((uint32_t)0xe0000001) /**< 224.0.0.1 */
95 #define RTE_IPV4_ALLRTRS_GROUP ((uint32_t)0xe0000002) /**< 224.0.0.2 */
96 #define RTE_IPV4_MAX_LOCAL_GROUP ((uint32_t)0xe00000ff) /**< 224.0.0.255 */
99 * IPv4 Multicast-related macros
101 #define RTE_IPV4_MIN_MCAST \
102 RTE_IPV4(224, 0, 0, 0) /**< Minimal IPv4-multicast address */
103 #define RTE_IPV4_MAX_MCAST \
104 RTE_IPV4(239, 255, 255, 255) /**< Maximum IPv4 multicast address */
106 #define RTE_IS_IPV4_MCAST(x) \
107 ((x) >= RTE_IPV4_MIN_MCAST && (x) <= RTE_IPV4_MAX_MCAST)
108 /**< check if IPv4 address is multicast */
110 /* IPv4 default fields values */
111 #define RTE_IPV4_MIN_IHL (0x5)
112 #define RTE_IPV4_VHL_DEF ((IPVERSION << 4) | RTE_IPV4_MIN_IHL)
115 * Get the length of an IPv4 header.
118 * Pointer to the IPv4 header.
120 * The length of the IPv4 header (with options if present) in bytes.
122 static inline uint8_t
123 rte_ipv4_hdr_len(const struct rte_ipv4_hdr *ipv4_hdr)
125 return (uint8_t)((ipv4_hdr->version_ihl & RTE_IPV4_HDR_IHL_MASK) *
126 RTE_IPV4_IHL_MULTIPLIER);
130 * @internal Calculate a sum of all words in the buffer.
131 * Helper routine for the rte_raw_cksum().
134 * Pointer to the buffer.
136 * Length of the buffer.
138 * Initial value of the sum.
140 * sum += Sum of all words in the buffer.
142 static inline uint32_t
143 __rte_raw_cksum(const void *buf, size_t len, uint32_t sum)
145 /* workaround gcc strict-aliasing warning */
146 uintptr_t ptr = (uintptr_t)buf;
147 typedef uint16_t __attribute__((__may_alias__)) u16_p;
148 const u16_p *u16_buf = (const u16_p *)ptr;
150 while (len >= (sizeof(*u16_buf) * 4)) {
155 len -= sizeof(*u16_buf) * 4;
158 while (len >= sizeof(*u16_buf)) {
160 len -= sizeof(*u16_buf);
164 /* if length is in odd bytes */
167 *(uint8_t *)&left = *(const uint8_t *)u16_buf;
175 * @internal Reduce a sum to the non-complemented checksum.
176 * Helper routine for the rte_raw_cksum().
181 * The non-complemented checksum.
183 static inline uint16_t
184 __rte_raw_cksum_reduce(uint32_t sum)
186 sum = ((sum & 0xffff0000) >> 16) + (sum & 0xffff);
187 sum = ((sum & 0xffff0000) >> 16) + (sum & 0xffff);
188 return (uint16_t)sum;
192 * Process the non-complemented checksum of a buffer.
195 * Pointer to the buffer.
197 * Length of the buffer.
199 * The non-complemented checksum.
201 static inline uint16_t
202 rte_raw_cksum(const void *buf, size_t len)
206 sum = __rte_raw_cksum(buf, len, 0);
207 return __rte_raw_cksum_reduce(sum);
211 * Compute the raw (non complemented) checksum of a packet.
214 * The pointer to the mbuf.
216 * The offset in bytes to start the checksum.
218 * The length in bytes of the data to checksum.
220 * A pointer to the checksum, filled on success.
222 * 0 on success, -1 on error (bad length or offset).
225 rte_raw_cksum_mbuf(const struct rte_mbuf *m, uint32_t off, uint32_t len,
228 const struct rte_mbuf *seg;
231 uint32_t seglen, done;
233 /* easy case: all data in the first segment */
234 if (off + len <= rte_pktmbuf_data_len(m)) {
235 *cksum = rte_raw_cksum(rte_pktmbuf_mtod_offset(m,
236 const char *, off), len);
240 if (unlikely(off + len > rte_pktmbuf_pkt_len(m)))
241 return -1; /* invalid params, return a dummy value */
243 /* else browse the segment to find offset */
245 for (seg = m; seg != NULL; seg = seg->next) {
246 seglen = rte_pktmbuf_data_len(seg);
251 RTE_ASSERT(seg != NULL);
255 buf = rte_pktmbuf_mtod_offset(seg, const char *, off);
257 /* all in one segment */
258 *cksum = rte_raw_cksum(buf, len);
262 /* hard case: process checksum of several segments */
266 tmp = __rte_raw_cksum(buf, seglen, 0);
268 tmp = rte_bswap16((uint16_t)tmp);
274 buf = rte_pktmbuf_mtod(seg, const char *);
275 seglen = rte_pktmbuf_data_len(seg);
276 if (seglen > len - done)
280 *cksum = __rte_raw_cksum_reduce(sum);
285 * Process the IPv4 checksum of an IPv4 header.
287 * The checksum field must be set to 0 by the caller.
290 * The pointer to the contiguous IPv4 header.
292 * The complemented checksum to set in the IP packet.
294 static inline uint16_t
295 rte_ipv4_cksum(const struct rte_ipv4_hdr *ipv4_hdr)
298 cksum = rte_raw_cksum(ipv4_hdr, rte_ipv4_hdr_len(ipv4_hdr));
299 return (uint16_t)~cksum;
303 * Process the pseudo-header checksum of an IPv4 header.
305 * The checksum field must be set to 0 by the caller.
307 * Depending on the ol_flags, the pseudo-header checksum expected by the
308 * drivers is not the same. For instance, when TSO is enabled, the IP
309 * payload length must not be included in the packet.
311 * When ol_flags is 0, it computes the standard pseudo-header checksum.
314 * The pointer to the contiguous IPv4 header.
316 * The ol_flags of the associated mbuf.
318 * The non-complemented checksum to set in the L4 header.
320 static inline uint16_t
321 rte_ipv4_phdr_cksum(const struct rte_ipv4_hdr *ipv4_hdr, uint64_t ol_flags)
323 struct ipv4_psd_header {
324 uint32_t src_addr; /* IP address of source host. */
325 uint32_t dst_addr; /* IP address of destination host. */
326 uint8_t zero; /* zero. */
327 uint8_t proto; /* L4 protocol type. */
328 uint16_t len; /* L4 length. */
333 psd_hdr.src_addr = ipv4_hdr->src_addr;
334 psd_hdr.dst_addr = ipv4_hdr->dst_addr;
336 psd_hdr.proto = ipv4_hdr->next_proto_id;
337 if (ol_flags & PKT_TX_TCP_SEG) {
340 l3_len = rte_be_to_cpu_16(ipv4_hdr->total_length);
341 psd_hdr.len = rte_cpu_to_be_16((uint16_t)(l3_len -
342 rte_ipv4_hdr_len(ipv4_hdr)));
344 return rte_raw_cksum(&psd_hdr, sizeof(psd_hdr));
348 * @internal Calculate the non-complemented IPv4 L4 checksum
350 static inline uint16_t
351 __rte_ipv4_udptcp_cksum(const struct rte_ipv4_hdr *ipv4_hdr, const void *l4_hdr)
354 uint32_t l3_len, l4_len;
357 ip_hdr_len = rte_ipv4_hdr_len(ipv4_hdr);
358 l3_len = rte_be_to_cpu_16(ipv4_hdr->total_length);
359 if (l3_len < ip_hdr_len)
362 l4_len = l3_len - ip_hdr_len;
364 cksum = rte_raw_cksum(l4_hdr, l4_len);
365 cksum += rte_ipv4_phdr_cksum(ipv4_hdr, 0);
367 cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
369 return (uint16_t)cksum;
373 * Process the IPv4 UDP or TCP checksum.
375 * The IP and layer 4 checksum must be set to 0 in the packet by
379 * The pointer to the contiguous IPv4 header.
381 * The pointer to the beginning of the L4 header.
383 * The complemented checksum to set in the IP packet.
385 static inline uint16_t
386 rte_ipv4_udptcp_cksum(const struct rte_ipv4_hdr *ipv4_hdr, const void *l4_hdr)
388 uint16_t cksum = __rte_ipv4_udptcp_cksum(ipv4_hdr, l4_hdr);
393 * Per RFC 768: If the computed checksum is zero for UDP,
394 * it is transmitted as all ones
395 * (the equivalent in one's complement arithmetic).
397 if (cksum == 0 && ipv4_hdr->next_proto_id == IPPROTO_UDP)
404 * Validate the IPv4 UDP or TCP checksum.
406 * In case of UDP, the caller must first check if udp_hdr->dgram_cksum is 0
407 * (i.e. no checksum).
410 * The pointer to the contiguous IPv4 header.
412 * The pointer to the beginning of the L4 header.
414 * Return 0 if the checksum is correct, else -1.
418 rte_ipv4_udptcp_cksum_verify(const struct rte_ipv4_hdr *ipv4_hdr,
421 uint16_t cksum = __rte_ipv4_udptcp_cksum(ipv4_hdr, l4_hdr);
432 struct rte_ipv6_hdr {
433 rte_be32_t vtc_flow; /**< IP version, traffic class & flow label. */
434 rte_be16_t payload_len; /**< IP payload size, including ext. headers */
435 uint8_t proto; /**< Protocol, next header. */
436 uint8_t hop_limits; /**< Hop limits. */
437 uint8_t src_addr[16]; /**< IP address of source host. */
438 uint8_t dst_addr[16]; /**< IP address of destination host(s). */
441 /* IPv6 vtc_flow: IPv / TC / flow_label */
442 #define RTE_IPV6_HDR_FL_SHIFT 0
443 #define RTE_IPV6_HDR_TC_SHIFT 20
444 #define RTE_IPV6_HDR_FL_MASK ((1u << RTE_IPV6_HDR_TC_SHIFT) - 1)
445 #define RTE_IPV6_HDR_TC_MASK (0xff << RTE_IPV6_HDR_TC_SHIFT)
446 #define RTE_IPV6_HDR_DSCP_MASK (0xfc << RTE_IPV6_HDR_TC_SHIFT)
447 #define RTE_IPV6_HDR_ECN_MASK (0x03 << RTE_IPV6_HDR_TC_SHIFT)
448 #define RTE_IPV6_HDR_ECN_CE RTE_IPV6_HDR_ECN_MASK
450 #define RTE_IPV6_MIN_MTU 1280 /**< Minimum MTU for IPv6, see RFC 8200. */
453 * Process the pseudo-header checksum of an IPv6 header.
455 * Depending on the ol_flags, the pseudo-header checksum expected by the
456 * drivers is not the same. For instance, when TSO is enabled, the IPv6
457 * payload length must not be included in the packet.
459 * When ol_flags is 0, it computes the standard pseudo-header checksum.
462 * The pointer to the contiguous IPv6 header.
464 * The ol_flags of the associated mbuf.
466 * The non-complemented checksum to set in the L4 header.
468 static inline uint16_t
469 rte_ipv6_phdr_cksum(const struct rte_ipv6_hdr *ipv6_hdr, uint64_t ol_flags)
473 rte_be32_t len; /* L4 length. */
474 rte_be32_t proto; /* L4 protocol - top 3 bytes must be zero */
477 psd_hdr.proto = (uint32_t)(ipv6_hdr->proto << 24);
478 if (ol_flags & PKT_TX_TCP_SEG) {
481 psd_hdr.len = ipv6_hdr->payload_len;
484 sum = __rte_raw_cksum(ipv6_hdr->src_addr,
485 sizeof(ipv6_hdr->src_addr) + sizeof(ipv6_hdr->dst_addr),
487 sum = __rte_raw_cksum(&psd_hdr, sizeof(psd_hdr), sum);
488 return __rte_raw_cksum_reduce(sum);
492 * @internal Calculate the non-complemented IPv4 L4 checksum
494 static inline uint16_t
495 __rte_ipv6_udptcp_cksum(const struct rte_ipv6_hdr *ipv6_hdr, const void *l4_hdr)
500 l4_len = rte_be_to_cpu_16(ipv6_hdr->payload_len);
502 cksum = rte_raw_cksum(l4_hdr, l4_len);
503 cksum += rte_ipv6_phdr_cksum(ipv6_hdr, 0);
505 cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
507 return (uint16_t)cksum;
511 * Process the IPv6 UDP or TCP checksum.
513 * The IPv4 header should not contains options. The layer 4 checksum
514 * must be set to 0 in the packet by the caller.
517 * The pointer to the contiguous IPv6 header.
519 * The pointer to the beginning of the L4 header.
521 * The complemented checksum to set in the IP packet.
523 static inline uint16_t
524 rte_ipv6_udptcp_cksum(const struct rte_ipv6_hdr *ipv6_hdr, const void *l4_hdr)
526 uint16_t cksum = __rte_ipv6_udptcp_cksum(ipv6_hdr, l4_hdr);
531 * Per RFC 768: If the computed checksum is zero for UDP,
532 * it is transmitted as all ones
533 * (the equivalent in one's complement arithmetic).
535 if (cksum == 0 && ipv6_hdr->proto == IPPROTO_UDP)
542 * Validate the IPv6 UDP or TCP checksum.
544 * In case of UDP, the caller must first check if udp_hdr->dgram_cksum is 0:
545 * this is either invalid or means no checksum in some situations. See 8.1
546 * (Upper-Layer Checksums) in RFC 8200.
549 * The pointer to the contiguous IPv6 header.
551 * The pointer to the beginning of the L4 header.
553 * Return 0 if the checksum is correct, else -1.
557 rte_ipv6_udptcp_cksum_verify(const struct rte_ipv6_hdr *ipv6_hdr,
560 uint16_t cksum = __rte_ipv6_udptcp_cksum(ipv6_hdr, l4_hdr);
568 /** IPv6 fragment extension header. */
569 #define RTE_IPV6_EHDR_MF_SHIFT 0
570 #define RTE_IPV6_EHDR_MF_MASK 1
571 #define RTE_IPV6_EHDR_FO_SHIFT 3
572 #define RTE_IPV6_EHDR_FO_MASK (~((1 << RTE_IPV6_EHDR_FO_SHIFT) - 1))
573 #define RTE_IPV6_EHDR_FO_ALIGN (1 << RTE_IPV6_EHDR_FO_SHIFT)
575 #define RTE_IPV6_FRAG_USED_MASK (RTE_IPV6_EHDR_MF_MASK | RTE_IPV6_EHDR_FO_MASK)
577 #define RTE_IPV6_GET_MF(x) ((x) & RTE_IPV6_EHDR_MF_MASK)
578 #define RTE_IPV6_GET_FO(x) ((x) >> RTE_IPV6_EHDR_FO_SHIFT)
580 #define RTE_IPV6_SET_FRAG_DATA(fo, mf) \
581 (((fo) & RTE_IPV6_EHDR_FO_MASK) | ((mf) & RTE_IPV6_EHDR_MF_MASK))
583 struct rte_ipv6_fragment_ext {
584 uint8_t next_header; /**< Next header type */
585 uint8_t reserved; /**< Reserved */
586 rte_be16_t frag_data; /**< All fragmentation data */
587 rte_be32_t id; /**< Packet ID */
590 /* IPv6 fragment extension header size */
591 #define RTE_IPV6_FRAG_HDR_SIZE sizeof(struct rte_ipv6_fragment_ext)
594 * Parse next IPv6 header extension
596 * This function checks if proto number is an IPv6 extensions and parses its
597 * data if so, providing information on next header and extension length.
600 * Pointer to an extension raw data.
602 * Protocol number extracted from the "next header" field from
603 * the IPv6 header or the previous extension.
605 * Extension data length.
607 * next protocol number if proto is an IPv6 extension, -EINVAL otherwise
611 rte_ipv6_get_next_ext(const uint8_t *p, int proto, size_t *ext_len)
618 *ext_len = (*p + 2) * sizeof(uint32_t);
621 case IPPROTO_HOPOPTS:
622 case IPPROTO_ROUTING:
623 case IPPROTO_DSTOPTS:
625 *ext_len = (*p + 1) * sizeof(uint64_t);
628 case IPPROTO_FRAGMENT:
630 *ext_len = RTE_IPV6_FRAG_HDR_SIZE;
644 #endif /* _RTE_IP_H_ */