X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fpackets.h;h=34a8b4eafb5a828d6ea0ca4bb28086b996f458b9;hb=541bc79f73add327072470c9bc3febb4195cdb3c;hp=3ff3babf0457dfd9358a1fefcb719202cff8b130;hpb=d5ca4fce0d017040a6f941beac7bb2a8bcaa685d;p=openvswitch diff --git a/lib/packets.h b/lib/packets.h index 3ff3babf..34a8b4ea 100644 --- a/lib/packets.h +++ b/lib/packets.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2008, 2009, 2010 Nicira Networks. + * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira Networks. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -29,6 +29,7 @@ struct ofpbuf; struct ds; +struct flow; bool dpid_from_string(const char *s, uint64_t *dpidp); @@ -38,7 +39,10 @@ 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, 0x01 }; + = { 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 inline bool eth_addr_is_broadcast(const uint8_t ea[6]) { @@ -53,17 +57,22 @@ static inline bool eth_addr_is_local(const uint8_t ea[6]) { /* 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)); + 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]) { return !(ea[0] | ea[1] | ea[2] | ea[3] | ea[4] | ea[5]); } +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]) { - return !memcmp(a, b, ETH_ADDR_LEN); + return !eth_addr_compare_3way(a, b); } static inline uint64_t eth_addr_to_uint64(const uint8_t ea[ETH_ADDR_LEN]) { @@ -123,6 +132,11 @@ void compose_benign_packet(struct ofpbuf *, const char *tag, uint16_t snap_type, const uint8_t eth_src[ETH_ADDR_LEN]); +void eth_push_vlan(struct ofpbuf *, ovs_be16 tci); +void eth_pop_vlan(struct ofpbuf *); + +const char *eth_from_hex(const char *hex, struct ofpbuf **packetp); + /* Example: * * uint8_t mac[ETH_ADDR_LEN]; @@ -155,7 +169,7 @@ void compose_benign_packet(struct ofpbuf *, const char *tag, #define ETH_TYPE_ARP 0x0806 #define ETH_TYPE_VLAN 0x8100 #define ETH_TYPE_IPV6 0x86dd -#define ETH_TYPE_CFM 0x8902 +#define ETH_TYPE_LACP 0x8809 /* Minimum value for an Ethernet type. Values below this are IEEE 802.2 frame * lengths. */ @@ -243,23 +257,6 @@ struct vlan_eth_header { } __attribute__((packed)); BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header)); -/* A 'ccm' represents a Continuity Check Message from the 802.1ag specification. - * Continuity Check Messages are broadcast periodically so that hosts can - * determine who they have connectivity to. */ -#define CCM_LEN 74 -#define CCM_MAID_LEN 48 -struct ccm { - uint8_t mdlevel_version; /* MD Level and Version */ - uint8_t opcode; - uint8_t flags; - uint8_t tlv_offset; - ovs_be32 seq; - ovs_be16 mpid; - uint8_t maid[CCM_MAID_LEN]; - uint8_t zero[16]; /* Defined by ITU-T Y.1731 should be zero */ -} __attribute__((packed)); -BUILD_ASSERT_DECL(CCM_LEN == sizeof(struct ccm)); - /* 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 @@ -271,6 +268,25 @@ BUILD_ASSERT_DECL(CCM_LEN == sizeof(struct ccm)); ((uint8_t *) ip)[2], \ ((uint8_t *) ip)[3] +/* Example: + * + * char *string = "1 33.44.55.66 2"; + * ovs_be32 ip; + * int a, b; + * + * if (sscanf(string, "%d"IP_SCAN_FMT"%d", + * &a, IP_SCAN_ARGS(&ip), &b) == 1 + IP_SCAN_COUNT + 1) { + * ... + * } + */ +#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] +#define IP_SCAN_COUNT 4 + /* 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 @@ -279,6 +295,13 @@ 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) @@ -311,11 +334,23 @@ struct ip_header { }; 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; ovs_be16 icmp_csum; + union { + struct { + ovs_be16 id; + ovs_be16 seq; + } echo; + struct { + ovs_be16 empty; + ovs_be16 mtu; + } frag; + ovs_be32 gateway; + } icmp_fields; + uint8_t icmp_data[0]; }; BUILD_ASSERT_DECL(ICMP_HEADER_LEN == sizeof(struct icmp_header)); @@ -335,8 +370,9 @@ BUILD_ASSERT_DECL(UDP_HEADER_LEN == sizeof(struct udp_header)); #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_CTL(flags, offset) (htons((flags) | ((offset) << 12))) +#define TCP_FLAGS(tcp_ctl) (ntohs(tcp_ctl) & 0x003f) +#define TCP_OFFSET(tcp_ctl) (ntohs(tcp_ctl) >> 12) #define TCP_HEADER_LEN 20 struct tcp_header { @@ -373,6 +409,23 @@ struct arp_eth_header { } __attribute__((packed)); BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN == sizeof(struct arp_eth_header)); +/* 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 (sscanf(string, "%d"IPV6_SCAN_FMT"%d", &a, ipv6_s, &b) == 3 + * && 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 } } } @@ -397,10 +450,25 @@ static inline bool ipv6_mask_is_exact(const struct in6_addr *mask) { 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_tcp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst); +void packet_set_udp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst); + +uint8_t packet_get_tcp_flags(const struct ofpbuf *, const struct flow *); + #endif /* packets.h */