diff options
Diffstat (limited to 'common/include/vxlan.h')
| -rw-r--r-- | common/include/vxlan.h | 160 |
1 files changed, 99 insertions, 61 deletions
diff --git a/common/include/vxlan.h b/common/include/vxlan.h index 942c2f3..14e7548 100644 --- a/common/include/vxlan.h +++ b/common/include/vxlan.h @@ -12,7 +12,9 @@ extern "C" #include "tuple.h" /* - * VXLAN Header: + ****************************************************************************** + * Standard VXLAN Header: + ****************************************************************************** * * 0 1 2 3 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 @@ -28,87 +30,123 @@ extern "C" * to zero on transmission and ignored on receipt. * Reserved fields (24 bits and 8 bits): * MUST be set to zero on transmission and ignored on receipt. + * + ****************************************************************************** + * SCE VXLAN Header: + ****************************************************************************** + * + * 0 1 2 3 + * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * |R|R|R|R|I|R|R|R| Reserved |S| Traffic Link ID | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | high | type | low |D|T|SF index |T| Reserved | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * + * Flags : 8 bits + * Reserved : 7 bits + * S (StateLess) : 1 bit + * + * Traffic Link ID : 16 bits + * + * vlan_id_half_high : 8 bits + * link_layer_type : 4 bits // 二层报文封装格式 + * vlan_id_half_low : 4 bits + * + * dir : 1 bit + * traffic : 1 bit + * sf_index : 5 bits // max value 32 + * online_test : 1 bit + * + * Reserved : 8 bit */ struct vxlan_hdr { - uint8_t flags; - uint8_t reserved[3]; - - // VNI 3 Bytes - uint8_t vlan_id_half_high; - - uint8_t link_layer_type : 4; // 二层报文封装格式 - uint8_t vlan_id_half_low : 4; - - uint8_t dir : 1; - uint8_t traffic : 1; - uint8_t sf_index : 5; // max value 32 - uint8_t online_test : 1; - - // Reserved 1 Bytes - uint8_t r7 : 1; - uint8_t r6 : 1; - uint8_t r5 : 1; - uint8_t r4 : 1; - uint8_t vni_flag : 1; - uint8_t r2 : 1; - uint8_t r1 : 1; - uint8_t r0 : 1; + uint16_t flags_reserved; + uint16_t link_id; + uint16_t vlan_id; + uint16_t user_ctx; } __attribute__((__packed__)); -enum vni_opt +#define VXLAN_DEFAULT_FLAGS 0x8 +#define VXLAN_DST_PORT 4789 +#define VXLAN_FRAME_HDR_LEN ((int)(sizeof(struct ethhdr) + sizeof(struct ip) + sizeof(struct udphdr) + sizeof(struct vxlan_hdr))) + +#define VXLAN_FLAGS_MASK 0xFF00 +#define VXLAN_STATELESS_MASK 0x0001 +#define VXLAN_DIR_MASK 0x8000 +#define VXLAN_TRAFFIC_MASK 0x4000 +#define VXLAN_SF_INDEX_MASK 0x3E00 + +static inline void vxlan_set_flags(struct vxlan_hdr *hdr, uint8_t flags) { - VNI_OPT_DIR = 0x80, - VNI_OPT_TRAFFIC = 0x40, - VNI_OPT_SFINDEX = 0x3f, -}; + hdr->flags_reserved = htons((ntohs(hdr->flags_reserved) & ~VXLAN_FLAGS_MASK) | (flags << 8)); +} -#define VXLAN_FLAGS 0x8 -#define VXLAN_DST_PORT 4789 -#define VXLAN_FRAME_HDR_LEN (sizeof(struct ethhdr) + sizeof(struct ip) + sizeof(struct udphdr) + sizeof(struct vxlan_hdr)) +static inline void vxlan_set_dir(struct vxlan_hdr *hdr, uint8_t val) +{ + hdr->user_ctx = htons((ntohs(hdr->user_ctx) & ~VXLAN_DIR_MASK) | ((!!val) << 15)); +} + +static inline void vxlan_set_traffic(struct vxlan_hdr *hdr, uint8_t val) +{ + hdr->user_ctx = htons((ntohs(hdr->user_ctx) & ~VXLAN_TRAFFIC_MASK) | ((!!val) << 14)); +} + +static inline void vxlan_set_sf_index(struct vxlan_hdr *hdr, uint8_t val) +{ + hdr->user_ctx = htons((ntohs(hdr->user_ctx) & ~VXLAN_SF_INDEX_MASK) | ((val & 0x1F) << 9)); +} + +static inline void vxlan_set_link_id(struct vxlan_hdr *hdr, uint16_t val) +{ + hdr->link_id = htons(val); +} + +static inline void vxlan_set_stateless(struct vxlan_hdr *hdr, uint8_t val) +{ + hdr->flags_reserved = htons((ntohs(hdr->flags_reserved) & ~VXLAN_STATELESS_MASK) | (!!val)); +} + +static inline uint8_t vxlan_get_flags(struct vxlan_hdr *hdr) +{ + return ((ntohs(hdr->flags_reserved) & VXLAN_FLAGS_MASK) >> 8); +} + +static inline uint8_t vxlan_get_dir(struct vxlan_hdr *hdr) +{ + return ((ntohs(hdr->user_ctx) & VXLAN_DIR_MASK) >> 15); +} + +static inline uint8_t vxlan_get_traffic(struct vxlan_hdr *hdr) +{ + return ((ntohs(hdr->user_ctx) & VXLAN_TRAFFIC_MASK) >> 14); +} + +static inline uint8_t vxlan_get_sf_index(struct vxlan_hdr *hdr) +{ + return ((ntohs(hdr->user_ctx) & VXLAN_SF_INDEX_MASK) >> 9); +} -static inline void vxlan_set_opt(struct vxlan_hdr *hdr, enum vni_opt opt, uint8_t val) +static inline uint16_t vxlan_get_link_id(struct vxlan_hdr *hdr) { - switch (opt) - { - case VNI_OPT_DIR: - hdr->dir = (!!val); - break; - case VNI_OPT_TRAFFIC: - hdr->traffic = (!!val); - break; - case VNI_OPT_SFINDEX: - hdr->sf_index = (0x1f & val); - break; - default: - break; - } + return ntohs(hdr->link_id); } -static inline uint8_t vxlan_get_opt(struct vxlan_hdr *hdr, enum vni_opt opt) +static inline uint8_t vxlan_get_stateless(struct vxlan_hdr *hdr) { - switch (opt) - { - case VNI_OPT_DIR: - return hdr->dir; - case VNI_OPT_TRAFFIC: - return hdr->traffic; - case VNI_OPT_SFINDEX: - return hdr->sf_index; - default: - return 0; - } + return ntohs(hdr->flags_reserved) & VXLAN_STATELESS_MASK; } // return 0 : success // return -1 : error -int vxlan_frame_decode(struct vxlan_hdr **vxlan_hdr, const char *data, uint16_t len); +int vxlan_frame_decode(struct vxlan_hdr **vxlan_hdr, const char *data, int len); void vxlan_frame_encode(char *buff, const u_char eth_src_mac[], const u_char eth_dst_mac[], const in_addr_t ip_src_addr, const in_addr_t ip_dst_addr, uint16_t ip_id, uint16_t udp_src_port, uint16_t udp_pld_len, - uint8_t vni_opt_dir, uint8_t vni_opt_traffic, uint8_t vni_opt_sf_index); + uint8_t dir, uint8_t traffic, uint8_t sf_index, uint16_t link_id); uint16_t calculate_vxlan_source_port(struct four_tuple *innermost_tuple4); |