X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fpackets.h;h=f294d847e578373336b99341a2ccd6146ef2a2ff;hb=c5cf10598f8c9f4428291e9df3ecd72a05fb1ccf;hp=d12cc0403e417eb62222e25b41c281dfa8ebddae;hpb=eaa71334348aa0d99abf5588e17b3e55d0db28ce;p=sliver-openvswitch.git diff --git a/lib/packets.h b/lib/packets.h index d12cc0403..f294d847e 100644 --- a/lib/packets.h +++ b/lib/packets.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2008, 2009 Nicira Networks. + * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -13,50 +13,120 @@ * See the License for the specific language governing permissions and * limitations under the License. */ + #ifndef PACKETS_H #define PACKETS_H 1 #include +#include +#include #include #include #include "compiler.h" +#include "openvswitch/types.h" #include "random.h" +#include "hash.h" #include "util.h" +struct ofpbuf; +struct ds; + +/* Tunnel information used in flow key and metadata. */ +struct flow_tnl { + ovs_be64 tun_id; + ovs_be32 ip_src; + ovs_be32 ip_dst; + uint16_t flags; + uint8_t ip_tos; + uint8_t ip_ttl; +}; + +/* Unfortunately, a "struct flow" sometimes has to handle OpenFlow port + * numbers and other times datapath (dpif) port numbers. This union allows + * access to both. */ +union flow_in_port { + odp_port_t odp_port; + ofp_port_t ofp_port; +}; + +/* Datapath packet metadata */ +struct pkt_metadata { + uint32_t recirc_id; /* Recirculation id carried with the + recirculating packets. 0 for packets + received from the wire. */ + uint32_t dp_hash; /* hash value computed by the recirculation + action. */ + struct flow_tnl tunnel; /* Encapsulating tunnel parameters. */ + uint32_t skb_priority; /* Packet priority for QoS. */ + uint32_t pkt_mark; /* Packet mark. */ + union flow_in_port in_port; /* Input port. */ +}; + +#define PKT_METADATA_INITIALIZER(PORT) \ + (struct pkt_metadata){ 0, 0, { 0, 0, 0, 0, 0, 0}, 0, 0, {(PORT)} } + +bool dpid_from_string(const char *s, uint64_t *dpidp); + #define ETH_ADDR_LEN 6 -static const uint8_t eth_addr_broadcast[ETH_ADDR_LEN] UNUSED +static const uint8_t eth_addr_broadcast[ETH_ADDR_LEN] OVS_UNUSED = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; +static const uint8_t eth_addr_stp[ETH_ADDR_LEN] OVS_UNUSED + = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x00 }; + +static const uint8_t eth_addr_lacp[ETH_ADDR_LEN] OVS_UNUSED + = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02 }; + +static const uint8_t eth_addr_bfd[ETH_ADDR_LEN] OVS_UNUSED + = { 0x00, 0x23, 0x20, 0x00, 0x00, 0x01 }; + static inline bool eth_addr_is_broadcast(const uint8_t ea[6]) { return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff; } -/* Returns true if 'ea' is an Ethernet address used for virtual interfaces - * under XenServer. Generally the actual Ethernet address is FE:FF:FF:FF:FF:FF - * but it can be FE:FE:FE:FE:FE:FE in some cases. */ -static inline bool eth_addr_is_vif(const uint8_t ea[6]) -{ - return ea[0] == 0xfe && (ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) >= 0xfe; -} - static inline bool eth_addr_is_multicast(const uint8_t ea[6]) { return ea[0] & 1; } -static inline bool eth_addr_is_local(const uint8_t ea[6]) +static inline bool eth_addr_is_local(const uint8_t ea[6]) { - return ea[0] & 2; + /* Local if it is either a locally administered address or a Nicira random + * address. */ + return ea[0] & 2 + || (ea[0] == 0x00 && ea[1] == 0x23 && ea[2] == 0x20 && ea[3] & 0x80); } -static inline bool eth_addr_is_zero(const uint8_t ea[6]) +static inline bool eth_addr_is_zero(const uint8_t ea[6]) { return !(ea[0] | ea[1] | ea[2] | ea[3] | ea[4] | ea[5]); } + +static inline int eth_mask_is_exact(const uint8_t ea[ETH_ADDR_LEN]) +{ + return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff; +} + +static inline int eth_addr_compare_3way(const uint8_t a[ETH_ADDR_LEN], + const uint8_t b[ETH_ADDR_LEN]) +{ + return memcmp(a, b, ETH_ADDR_LEN); +} static inline bool eth_addr_equals(const uint8_t a[ETH_ADDR_LEN], - const uint8_t b[ETH_ADDR_LEN]) + const uint8_t b[ETH_ADDR_LEN]) +{ + return !eth_addr_compare_3way(a, b); +} +static inline bool eth_addr_equal_except(const uint8_t a[ETH_ADDR_LEN], + const uint8_t b[ETH_ADDR_LEN], + const uint8_t mask[ETH_ADDR_LEN]) { - return !memcmp(a, b, ETH_ADDR_LEN); + return !(((a[0] ^ b[0]) & mask[0]) + || ((a[1] ^ b[1]) & mask[1]) + || ((a[2] ^ b[2]) & mask[2]) + || ((a[3] ^ b[3]) & mask[3]) + || ((a[4] ^ b[4]) & mask[4]) + || ((a[5] ^ b[5]) & mask[5])); } static inline uint64_t eth_addr_to_uint64(const uint8_t ea[ETH_ADDR_LEN]) { @@ -67,6 +137,11 @@ static inline uint64_t eth_addr_to_uint64(const uint8_t ea[ETH_ADDR_LEN]) | ((uint64_t) ea[4] << 8) | ea[5]); } +static inline uint64_t eth_addr_vlan_to_uint64(const uint8_t ea[ETH_ADDR_LEN], + uint16_t vlan) +{ + return (((uint64_t)vlan << 48) | eth_addr_to_uint64(ea)); +} static inline void eth_addr_from_uint64(uint64_t x, uint8_t ea[ETH_ADDR_LEN]) { ea[0] = x >> 40; @@ -86,18 +161,50 @@ static inline void eth_addr_random(uint8_t ea[ETH_ADDR_LEN]) random_bytes(ea, ETH_ADDR_LEN); eth_addr_mark_random(ea); } -/* Returns true if 'ea' is a reserved multicast address, that a bridge must - * never forward, false otherwise. */ -static inline bool eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN]) +static inline void eth_addr_nicira_random(uint8_t ea[ETH_ADDR_LEN]) { - return (ea[0] == 0x01 - && ea[1] == 0x80 - && ea[2] == 0xc2 - && ea[3] == 0x00 - && ea[4] == 0x00 - && (ea[5] & 0xf0) == 0x00); + eth_addr_random(ea); + + /* Set the OUI to the Nicira one. */ + ea[0] = 0x00; + ea[1] = 0x23; + ea[2] = 0x20; + + /* Set the top bit to indicate random Nicira address. */ + ea[3] |= 0x80; +} +static inline uint32_t hash_mac(const uint8_t ea[ETH_ADDR_LEN], + const uint16_t vlan, const uint32_t basis) +{ + return hash_uint64_basis(eth_addr_vlan_to_uint64(ea, vlan), basis); } +bool eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN]); +bool eth_addr_from_string(const char *, uint8_t ea[ETH_ADDR_LEN]); + +void compose_rarp(struct ofpbuf *, const uint8_t eth_src[ETH_ADDR_LEN]); + +void eth_push_vlan(struct ofpbuf *, ovs_be16 tpid, ovs_be16 tci); +void eth_pop_vlan(struct ofpbuf *); + +const char *eth_from_hex(const char *hex, struct ofpbuf **packetp); +void eth_format_masked(const uint8_t eth[ETH_ADDR_LEN], + const uint8_t mask[ETH_ADDR_LEN], struct ds *s); +void eth_addr_bitand(const uint8_t src[ETH_ADDR_LEN], + const uint8_t mask[ETH_ADDR_LEN], + uint8_t dst[ETH_ADDR_LEN]); + +void set_mpls_lse(struct ofpbuf *, ovs_be32 label); +void push_mpls(struct ofpbuf *packet, ovs_be16 ethtype, ovs_be32 lse); +void pop_mpls(struct ofpbuf *, ovs_be16 ethtype); + +void set_mpls_lse_ttl(ovs_be32 *lse, uint8_t ttl); +void set_mpls_lse_tc(ovs_be32 *lse, uint8_t tc); +void set_mpls_lse_label(ovs_be32 *lse, ovs_be32 label); +void set_mpls_lse_bos(ovs_be32 *lse, uint8_t bos); +ovs_be32 set_mpls_lse_values(uint8_t ttl, uint8_t tc, uint8_t bos, + ovs_be32 label); + /* Example: * * uint8_t mac[ETH_ADDR_LEN]; @@ -116,19 +223,35 @@ static inline bool eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN]) * uint8_t mac[ETH_ADDR_LEN]; * int a, b; * - * if (sscanf(string, "%d"ETH_ADDR_SCAN_FMT"%d", - * &a, ETH_ADDR_SCAN_ARGS(mac), &b) == 1 + ETH_ADDR_SCAN_COUNT + 1) { + * if (ovs_scan(string, "%d"ETH_ADDR_SCAN_FMT"%d", + * &a, ETH_ADDR_SCAN_ARGS(mac), &b)) { * ... * } */ #define ETH_ADDR_SCAN_FMT "%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8 #define ETH_ADDR_SCAN_ARGS(ea) \ &(ea)[0], &(ea)[1], &(ea)[2], &(ea)[3], &(ea)[4], &(ea)[5] -#define ETH_ADDR_SCAN_COUNT 6 #define ETH_TYPE_IP 0x0800 #define ETH_TYPE_ARP 0x0806 -#define ETH_TYPE_VLAN 0x8100 +#define ETH_TYPE_VLAN_8021Q 0x8100 +#define ETH_TYPE_VLAN ETH_TYPE_VLAN_8021Q +#define ETH_TYPE_VLAN_8021AD 0x88a8 +#define ETH_TYPE_IPV6 0x86dd +#define ETH_TYPE_LACP 0x8809 +#define ETH_TYPE_RARP 0x8035 +#define ETH_TYPE_MPLS 0x8847 +#define ETH_TYPE_MPLS_MCAST 0x8848 + +static inline bool eth_type_mpls(ovs_be16 eth_type) +{ + return eth_type == htons(ETH_TYPE_MPLS) || + eth_type == htons(ETH_TYPE_MPLS_MCAST); +} + +/* Minimum value for an Ethernet type. Values below this are IEEE 802.2 frame + * lengths. */ +#define ETH_TYPE_MIN 0x600 #define ETH_HEADER_LEN 14 #define ETH_PAYLOAD_MIN 46 @@ -136,11 +259,12 @@ static inline bool eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN]) #define ETH_TOTAL_MIN (ETH_HEADER_LEN + ETH_PAYLOAD_MIN) #define ETH_TOTAL_MAX (ETH_HEADER_LEN + ETH_PAYLOAD_MAX) #define ETH_VLAN_TOTAL_MAX (ETH_HEADER_LEN + VLAN_HEADER_LEN + ETH_PAYLOAD_MAX) +OVS_PACKED( struct eth_header { uint8_t eth_dst[ETH_ADDR_LEN]; uint8_t eth_src[ETH_ADDR_LEN]; - uint16_t eth_type; -} __attribute__((packed)); + ovs_be16 eth_type; +}); BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header)); #define LLC_DSAP_SNAP 0xaa @@ -148,67 +272,198 @@ BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header)); #define LLC_CNTL_SNAP 3 #define LLC_HEADER_LEN 3 +OVS_PACKED( struct llc_header { uint8_t llc_dsap; uint8_t llc_ssap; uint8_t llc_cntl; -} __attribute__((packed)); +}); BUILD_ASSERT_DECL(LLC_HEADER_LEN == sizeof(struct llc_header)); #define SNAP_ORG_ETHERNET "\0\0" /* The compiler adds a null byte, so sizeof(SNAP_ORG_ETHERNET) == 3. */ #define SNAP_HEADER_LEN 5 +OVS_PACKED( struct snap_header { uint8_t snap_org[3]; - uint16_t snap_type; -} __attribute__((packed)); + ovs_be16 snap_type; +}); BUILD_ASSERT_DECL(SNAP_HEADER_LEN == sizeof(struct snap_header)); #define LLC_SNAP_HEADER_LEN (LLC_HEADER_LEN + SNAP_HEADER_LEN) +OVS_PACKED( struct llc_snap_header { struct llc_header llc; struct snap_header snap; -} __attribute__((packed)); +}); BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header)); #define VLAN_VID_MASK 0x0fff +#define VLAN_VID_SHIFT 0 + #define VLAN_PCP_MASK 0xe000 +#define VLAN_PCP_SHIFT 13 + +#define VLAN_CFI 0x1000 +#define VLAN_CFI_SHIFT 12 + +/* Given the vlan_tci field from an 802.1Q header, in network byte order, + * returns the VLAN ID in host byte order. */ +static inline uint16_t +vlan_tci_to_vid(ovs_be16 vlan_tci) +{ + return (ntohs(vlan_tci) & VLAN_VID_MASK) >> VLAN_VID_SHIFT; +} + +/* Given the vlan_tci field from an 802.1Q header, in network byte order, + * returns the priority code point (PCP) in host byte order. */ +static inline int +vlan_tci_to_pcp(ovs_be16 vlan_tci) +{ + return (ntohs(vlan_tci) & VLAN_PCP_MASK) >> VLAN_PCP_SHIFT; +} + +/* Given the vlan_tci field from an 802.1Q header, in network byte order, + * returns the Canonical Format Indicator (CFI). */ +static inline int +vlan_tci_to_cfi(ovs_be16 vlan_tci) +{ + return (vlan_tci & htons(VLAN_CFI)) != 0; +} #define VLAN_HEADER_LEN 4 struct vlan_header { - uint16_t vlan_tci; /* Lowest 12 bits are VLAN ID. */ - uint16_t vlan_next_type; + ovs_be16 vlan_tci; /* Lowest 12 bits are VLAN ID. */ + ovs_be16 vlan_next_type; }; BUILD_ASSERT_DECL(VLAN_HEADER_LEN == sizeof(struct vlan_header)); #define VLAN_ETH_HEADER_LEN (ETH_HEADER_LEN + VLAN_HEADER_LEN) +OVS_PACKED( struct vlan_eth_header { uint8_t veth_dst[ETH_ADDR_LEN]; uint8_t veth_src[ETH_ADDR_LEN]; - uint16_t veth_type; /* Always htons(ETH_TYPE_VLAN). */ - uint16_t veth_tci; /* Lowest 12 bits are VLAN ID. */ - uint16_t veth_next_type; -} __attribute__((packed)); + ovs_be16 veth_type; /* Always htons(ETH_TYPE_VLAN). */ + ovs_be16 veth_tci; /* Lowest 12 bits are VLAN ID. */ + ovs_be16 veth_next_type; +}); BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header)); -/* The "(void) (ip)[0]" below has no effect on the value, since it's the first - * argument of a comma expression, but it makes sure that 'ip' is a pointer. - * This is useful since a common mistake is to pass an integer instead of a - * pointer to IP_ARGS. */ -#define IP_FMT "%"PRIu8".%"PRIu8".%"PRIu8".%"PRIu8 +/* MPLS related definitions */ +#define MPLS_TTL_MASK 0x000000ff +#define MPLS_TTL_SHIFT 0 + +#define MPLS_BOS_MASK 0x00000100 +#define MPLS_BOS_SHIFT 8 + +#define MPLS_TC_MASK 0x00000e00 +#define MPLS_TC_SHIFT 9 + +#define MPLS_LABEL_MASK 0xfffff000 +#define MPLS_LABEL_SHIFT 12 + +#define MPLS_HLEN 4 + +struct mpls_hdr { + ovs_16aligned_be32 mpls_lse; +}; +BUILD_ASSERT_DECL(MPLS_HLEN == sizeof(struct mpls_hdr)); + +/* Given a mpls label stack entry in network byte order + * return mpls label in host byte order */ +static inline uint32_t +mpls_lse_to_label(ovs_be32 mpls_lse) +{ + return (ntohl(mpls_lse) & MPLS_LABEL_MASK) >> MPLS_LABEL_SHIFT; +} + +/* Given a mpls label stack entry in network byte order + * return mpls tc */ +static inline uint8_t +mpls_lse_to_tc(ovs_be32 mpls_lse) +{ + return (ntohl(mpls_lse) & MPLS_TC_MASK) >> MPLS_TC_SHIFT; +} + +/* Given a mpls label stack entry in network byte order + * return mpls ttl */ +static inline uint8_t +mpls_lse_to_ttl(ovs_be32 mpls_lse) +{ + return (ntohl(mpls_lse) & MPLS_TTL_MASK) >> MPLS_TTL_SHIFT; +} + +/* Set TTL in mpls lse. */ +static inline void +flow_set_mpls_lse_ttl(ovs_be32 *mpls_lse, uint8_t ttl) +{ + *mpls_lse &= ~htonl(MPLS_TTL_MASK); + *mpls_lse |= htonl(ttl << MPLS_TTL_SHIFT); +} + +/* Given a mpls label stack entry in network byte order + * return mpls BoS bit */ +static inline uint8_t +mpls_lse_to_bos(ovs_be32 mpls_lse) +{ + return (mpls_lse & htonl(MPLS_BOS_MASK)) != 0; +} + +#define IP_FMT "%"PRIu32".%"PRIu32".%"PRIu32".%"PRIu32 #define IP_ARGS(ip) \ - ((void) (ip)[0], ((uint8_t *) ip)[0]), \ - ((uint8_t *) ip)[1], \ - ((uint8_t *) ip)[2], \ - ((uint8_t *) ip)[3] + ntohl(ip) >> 24, \ + (ntohl(ip) >> 16) & 0xff, \ + (ntohl(ip) >> 8) & 0xff, \ + ntohl(ip) & 0xff + +/* Example: + * + * char *string = "1 33.44.55.66 2"; + * ovs_be32 ip; + * int a, b; + * + * if (ovs_scan(string, "%d"IP_SCAN_FMT"%d", &a, IP_SCAN_ARGS(&ip), &b)) { + * ... + * } + */ +#define IP_SCAN_FMT "%"SCNu8".%"SCNu8".%"SCNu8".%"SCNu8 +#define IP_SCAN_ARGS(ip) \ + ((void) (ovs_be32) *(ip), &((uint8_t *) ip)[0]), \ + &((uint8_t *) ip)[1], \ + &((uint8_t *) ip)[2], \ + &((uint8_t *) ip)[3] + +/* Returns true if 'netmask' is a CIDR netmask, that is, if it consists of N + * high-order 1-bits and 32-N low-order 0-bits. */ +static inline bool +ip_is_cidr(ovs_be32 netmask) +{ + uint32_t x = ~ntohl(netmask); + return !(x & (x + 1)); +} +static inline bool +ip_is_multicast(ovs_be32 ip) +{ + return (ip & htonl(0xf0000000)) == htonl(0xe0000000); +} +int ip_count_cidr_bits(ovs_be32 netmask); +void ip_format_masked(ovs_be32 ip, ovs_be32 mask, struct ds *); #define IP_VER(ip_ihl_ver) ((ip_ihl_ver) >> 4) #define IP_IHL(ip_ihl_ver) ((ip_ihl_ver) & 15) #define IP_IHL_VER(ihl, ver) (((ver) << 4) | (ihl)) -#define IP_TYPE_ICMP 1 -#define IP_TYPE_TCP 6 -#define IP_TYPE_UDP 17 +#ifndef IPPROTO_SCTP +#define IPPROTO_SCTP 132 +#endif + +/* TOS fields. */ +#define IP_ECN_NOT_ECT 0x0 +#define IP_ECN_ECT_1 0x01 +#define IP_ECN_ECT_0 0x02 +#define IP_ECN_CE 0x03 +#define IP_ECN_MASK 0x03 +#define IP_DSCP_MASK 0xfc #define IP_VERSION 4 @@ -222,54 +477,80 @@ BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header)); struct ip_header { uint8_t ip_ihl_ver; uint8_t ip_tos; - uint16_t ip_tot_len; - uint16_t ip_id; - uint16_t ip_frag_off; + ovs_be16 ip_tot_len; + ovs_be16 ip_id; + ovs_be16 ip_frag_off; uint8_t ip_ttl; uint8_t ip_proto; - uint16_t ip_csum; - uint32_t ip_src; - uint32_t ip_dst; + ovs_be16 ip_csum; + ovs_16aligned_be32 ip_src; + ovs_16aligned_be32 ip_dst; }; BUILD_ASSERT_DECL(IP_HEADER_LEN == sizeof(struct ip_header)); -#define ICMP_HEADER_LEN 4 +#define ICMP_HEADER_LEN 8 struct icmp_header { uint8_t icmp_type; uint8_t icmp_code; - uint16_t icmp_csum; + ovs_be16 icmp_csum; + union { + struct { + ovs_be16 id; + ovs_be16 seq; + } echo; + struct { + ovs_be16 empty; + ovs_be16 mtu; + } frag; + ovs_16aligned_be32 gateway; + } icmp_fields; + uint8_t icmp_data[0]; }; BUILD_ASSERT_DECL(ICMP_HEADER_LEN == sizeof(struct icmp_header)); +#define SCTP_HEADER_LEN 12 +struct sctp_header { + ovs_be16 sctp_src; + ovs_be16 sctp_dst; + ovs_16aligned_be32 sctp_vtag; + ovs_16aligned_be32 sctp_csum; +}; +BUILD_ASSERT_DECL(SCTP_HEADER_LEN == sizeof(struct sctp_header)); + #define UDP_HEADER_LEN 8 struct udp_header { - uint16_t udp_src; - uint16_t udp_dst; - uint16_t udp_len; - uint16_t udp_csum; + ovs_be16 udp_src; + ovs_be16 udp_dst; + ovs_be16 udp_len; + ovs_be16 udp_csum; }; BUILD_ASSERT_DECL(UDP_HEADER_LEN == sizeof(struct udp_header)); -#define TCP_FIN 0x01 -#define TCP_SYN 0x02 -#define TCP_RST 0x04 -#define TCP_PSH 0x08 -#define TCP_ACK 0x10 -#define TCP_URG 0x20 - -#define TCP_FLAGS(tcp_ctl) (htons(tcp_ctl) & 0x003f) -#define TCP_OFFSET(tcp_ctl) (htons(tcp_ctl) >> 12) +#define TCP_FIN 0x001 +#define TCP_SYN 0x002 +#define TCP_RST 0x004 +#define TCP_PSH 0x008 +#define TCP_ACK 0x010 +#define TCP_URG 0x020 +#define TCP_ECE 0x040 +#define TCP_CWR 0x080 +#define TCP_NS 0x100 + +#define TCP_CTL(flags, offset) (htons((flags) | ((offset) << 12))) +#define TCP_FLAGS(tcp_ctl) (ntohs(tcp_ctl) & 0x0fff) +#define TCP_FLAGS_BE16(tcp_ctl) ((tcp_ctl) & htons(0x0fff)) +#define TCP_OFFSET(tcp_ctl) (ntohs(tcp_ctl) >> 12) #define TCP_HEADER_LEN 20 struct tcp_header { - uint16_t tcp_src; - uint16_t tcp_dst; - uint32_t tcp_seq; - uint32_t tcp_ack; - uint16_t tcp_ctl; - uint16_t tcp_winsz; - uint16_t tcp_csum; - uint16_t tcp_urg; + ovs_be16 tcp_src; + ovs_be16 tcp_dst; + ovs_16aligned_be32 tcp_seq; + ovs_16aligned_be32 tcp_ack; + ovs_be16 tcp_ctl; + ovs_be16 tcp_winsz; + ovs_be16 tcp_csum; + ovs_be16 tcp_urg; }; BUILD_ASSERT_DECL(TCP_HEADER_LEN == sizeof(struct tcp_header)); @@ -277,22 +558,128 @@ BUILD_ASSERT_DECL(TCP_HEADER_LEN == sizeof(struct tcp_header)); #define ARP_PRO_IP 0x0800 #define ARP_OP_REQUEST 1 #define ARP_OP_REPLY 2 +#define ARP_OP_RARP 3 #define ARP_ETH_HEADER_LEN 28 struct arp_eth_header { /* Generic members. */ - uint16_t ar_hrd; /* Hardware type. */ - uint16_t ar_pro; /* Protocol type. */ + ovs_be16 ar_hrd; /* Hardware type. */ + ovs_be16 ar_pro; /* Protocol type. */ uint8_t ar_hln; /* Hardware address length. */ uint8_t ar_pln; /* Protocol address length. */ - uint16_t ar_op; /* Opcode. */ + ovs_be16 ar_op; /* Opcode. */ /* Ethernet+IPv4 specific members. */ uint8_t ar_sha[ETH_ADDR_LEN]; /* Sender hardware address. */ - uint32_t ar_spa; /* Sender protocol address. */ + ovs_16aligned_be32 ar_spa; /* Sender protocol address. */ uint8_t ar_tha[ETH_ADDR_LEN]; /* Target hardware address. */ - uint32_t ar_tpa; /* Target protocol address. */ -} __attribute__((packed)); + ovs_16aligned_be32 ar_tpa; /* Target protocol address. */ +}; BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN == sizeof(struct arp_eth_header)); +/* Like struct in6_addr, but whereas that struct requires 32-bit alignment on + * most implementations, this one only requires 16-bit alignment. */ +union ovs_16aligned_in6_addr { + ovs_be16 be16[8]; + ovs_16aligned_be32 be32[4]; +}; + +/* Like struct in6_hdr, but whereas that struct requires 32-bit alignment, this + * one only requires 16-bit alignment. */ +struct ovs_16aligned_ip6_hdr { + union { + struct ovs_16aligned_ip6_hdrctl { + ovs_16aligned_be32 ip6_un1_flow; + ovs_be16 ip6_un1_plen; + uint8_t ip6_un1_nxt; + uint8_t ip6_un1_hlim; + } ip6_un1; + uint8_t ip6_un2_vfc; + } ip6_ctlun; + union ovs_16aligned_in6_addr ip6_src; + union ovs_16aligned_in6_addr ip6_dst; +}; + +/* Like struct in6_frag, but whereas that struct requires 32-bit alignment, + * this one only requires 16-bit alignment. */ +struct ovs_16aligned_ip6_frag { + uint8_t ip6f_nxt; + uint8_t ip6f_reserved; + ovs_be16 ip6f_offlg; + ovs_16aligned_be32 ip6f_ident; +}; + +/* The IPv6 flow label is in the lower 20 bits of the first 32-bit word. */ +#define IPV6_LABEL_MASK 0x000fffff + +/* Example: + * + * char *string = "1 ::1 2"; + * char ipv6_s[IPV6_SCAN_LEN + 1]; + * struct in6_addr ipv6; + * + * if (ovs_scan(string, "%d"IPV6_SCAN_FMT"%d", &a, ipv6_s, &b) + * && inet_pton(AF_INET6, ipv6_s, &ipv6) == 1) { + * ... + * } + */ +#define IPV6_SCAN_FMT "%46[0123456789abcdefABCDEF:.]" +#define IPV6_SCAN_LEN 46 + +extern const struct in6_addr in6addr_exact; +#define IN6ADDR_EXACT_INIT { { { 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, \ + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff } } } + +static inline bool ipv6_addr_equals(const struct in6_addr *a, + const struct in6_addr *b) +{ +#ifdef IN6_ARE_ADDR_EQUAL + return IN6_ARE_ADDR_EQUAL(a, b); +#else + return !memcmp(a, b, sizeof(*a)); +#endif +} + +static inline bool ipv6_mask_is_any(const struct in6_addr *mask) { + return ipv6_addr_equals(mask, &in6addr_any); +} + +static inline bool ipv6_mask_is_exact(const struct in6_addr *mask) { + return ipv6_addr_equals(mask, &in6addr_exact); +} + +static inline bool dl_type_is_ip_any(ovs_be16 dl_type) +{ + return dl_type == htons(ETH_TYPE_IP) + || dl_type == htons(ETH_TYPE_IPV6); +} + +void format_ipv6_addr(char *addr_str, const struct in6_addr *addr); +void print_ipv6_addr(struct ds *string, const struct in6_addr *addr); +void print_ipv6_masked(struct ds *string, const struct in6_addr *addr, + const struct in6_addr *mask); +struct in6_addr ipv6_addr_bitand(const struct in6_addr *src, + const struct in6_addr *mask); +struct in6_addr ipv6_create_mask(int mask); +int ipv6_count_cidr_bits(const struct in6_addr *netmask); +bool ipv6_is_cidr(const struct in6_addr *netmask); + +void *eth_compose(struct ofpbuf *, const uint8_t eth_dst[ETH_ADDR_LEN], + const uint8_t eth_src[ETH_ADDR_LEN], uint16_t eth_type, + size_t size); +void *snap_compose(struct ofpbuf *, const uint8_t eth_dst[ETH_ADDR_LEN], + const uint8_t eth_src[ETH_ADDR_LEN], + unsigned int oui, uint16_t snap_type, size_t size); +void packet_set_ipv4(struct ofpbuf *, ovs_be32 src, ovs_be32 dst, uint8_t tos, + uint8_t ttl); +void packet_set_ipv6(struct ofpbuf *, uint8_t proto, const ovs_be32 src[4], + const ovs_be32 dst[4], uint8_t tc, + ovs_be32 fl, uint8_t hlmit); +void packet_set_tcp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst); +void packet_set_udp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst); +void packet_set_sctp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst); + +void packet_format_tcp_flags(struct ds *, uint16_t); +const char *packet_tcp_flag_to_string(uint32_t flag); + #endif /* packets.h */