diff options
Diffstat (limited to 'vnet/vnet/ip/ip4_packet.h')
| -rw-r--r-- | vnet/vnet/ip/ip4_packet.h | 119 |
1 files changed, 88 insertions, 31 deletions
diff --git a/vnet/vnet/ip/ip4_packet.h b/vnet/vnet/ip/ip4_packet.h index 277b968f9ab..8da788b411f 100644 --- a/vnet/vnet/ip/ip4_packet.h +++ b/vnet/vnet/ip/ip4_packet.h @@ -46,7 +46,8 @@ /* IP4 address which can be accessed either as 4 bytes or as a 32-bit number. */ -typedef union { +typedef union +{ u8 data[4]; u32 data_u32; /* Aliases. */ @@ -54,7 +55,8 @@ typedef union { u32 as_u32; } ip4_address_t; -typedef struct { +typedef struct +{ /* IP address must be first for ip_interface_address_get_address() to work */ ip4_address_t ip4_addr; u32 fib_index; @@ -69,7 +71,8 @@ ip4_addr_fib_init (ip4_address_fib_t * addr_fib, ip4_address_t * address, } /* (src,dst) pair of addresses as found in packet header. */ -typedef struct { +typedef struct +{ ip4_address_t src, dst; } ip4_address_pair_t; @@ -83,26 +86,46 @@ ip4_address_netmask_length (ip4_address_t * a) { switch (a->as_u8[i]) { - case 0xff: result += 8; break; - case 0xfe: result += 7; goto done; - case 0xfc: result += 6; goto done; - case 0xf8: result += 5; goto done; - case 0xf0: result += 4; goto done; - case 0xe0: result += 3; goto done; - case 0xc0: result += 2; goto done; - case 0x80: result += 1; goto done; - case 0x00: result += 0; goto done; + case 0xff: + result += 8; + break; + case 0xfe: + result += 7; + goto done; + case 0xfc: + result += 6; + goto done; + case 0xf8: + result += 5; + goto done; + case 0xf0: + result += 4; + goto done; + case 0xe0: + result += 3; + goto done; + case 0xc0: + result += 2; + goto done; + case 0x80: + result += 1; + goto done; + case 0x00: + result += 0; + goto done; default: /* Not a valid netmask mask. */ return ~0; } } - done: +done: return result; } -typedef union { - struct { +typedef union +{ + struct + { /* 4 bit packet length (in 32bit units) and version VVVVLLLL. e.g. for packets w/ no options ip_version_and_header_length == 0x45. */ u8 ip_version_and_header_length; @@ -133,25 +156,31 @@ typedef union { u16 checksum; /* Source and destination address. */ - union { - struct { + union + { + struct + { ip4_address_t src_address, dst_address; }; ip4_address_pair_t address_pair; - }; + }; }; /* For checksumming we'll want to access IP header in word sized chunks. */ /* For 64 bit machines. */ + /* *INDENT-OFF* */ CLIB_PACKED (struct { u64 checksum_data_64[2]; u32 checksum_data_64_32[1]; }); + /* *INDENT-ON* */ /* For 32 bit machines. */ + /* *INDENT-OFF* */ CLIB_PACKED (struct { u32 checksum_data_32[5]; }); + /* *INDENT-ON* */ } ip4_header_t; /* Value of ip_version_and_header_length for packets w/o options. */ @@ -160,35 +189,50 @@ typedef union { always_inline int ip4_get_fragment_offset (ip4_header_t * i) -{ return clib_net_to_host_u16 (i->flags_and_fragment_offset) & 0x1fff; } +{ + return clib_net_to_host_u16 (i->flags_and_fragment_offset) & 0x1fff; +} always_inline int ip4_get_fragment_more (ip4_header_t * i) -{ return clib_net_to_host_u16 (i->flags_and_fragment_offset) & IP4_HEADER_FLAG_MORE_FRAGMENTS; } +{ + return clib_net_to_host_u16 (i->flags_and_fragment_offset) & + IP4_HEADER_FLAG_MORE_FRAGMENTS; +} always_inline int ip4_is_fragment (ip4_header_t * i) -{ return (i->flags_and_fragment_offset & - clib_net_to_host_u16 (0x1fff | IP4_HEADER_FLAG_MORE_FRAGMENTS)); } +{ + return (i->flags_and_fragment_offset & + clib_net_to_host_u16 (0x1fff | IP4_HEADER_FLAG_MORE_FRAGMENTS)); +} always_inline int ip4_is_first_fragment (ip4_header_t * i) -{ return (i->flags_and_fragment_offset & - clib_net_to_host_u16 (0x1fff | IP4_HEADER_FLAG_MORE_FRAGMENTS)) == - clib_net_to_host_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS); } +{ + return (i->flags_and_fragment_offset & + clib_net_to_host_u16 (0x1fff | IP4_HEADER_FLAG_MORE_FRAGMENTS)) == + clib_net_to_host_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS); +} /* Fragment offset in bytes. */ always_inline int ip4_get_fragment_offset_bytes (ip4_header_t * i) -{ return 8 * ip4_get_fragment_offset (i); } +{ + return 8 * ip4_get_fragment_offset (i); +} always_inline int ip4_header_bytes (ip4_header_t * i) -{ return sizeof (u32) * (i->ip_version_and_header_length & 0xf); } +{ + return sizeof (u32) * (i->ip_version_and_header_length & 0xf); +} always_inline void * ip4_next_header (ip4_header_t * i) -{ return (void *) i + ip4_header_bytes (i); } +{ + return (void *) i + ip4_header_bytes (i); +} always_inline u16 ip4_header_checksum (ip4_header_t * i) @@ -213,7 +257,9 @@ ip4_header_checksum (ip4_header_t * i) static inline uword ip4_header_checksum_is_valid (ip4_header_t * i) -{ return i->checksum == ip4_header_checksum (i); } +{ + return i->checksum == ip4_header_checksum (i); +} #define ip4_partial_header_checksum_x1(ip0,sum0) \ do { \ @@ -261,10 +307,13 @@ do { \ always_inline uword ip4_address_is_multicast (ip4_address_t * a) -{ return (a->data[0] & 0xf0) == 0xe0; } +{ + return (a->data[0] & 0xf0) == 0xe0; +} always_inline void -ip4_multicast_address_set_for_group (ip4_address_t * a, ip_multicast_group_t g) +ip4_multicast_address_set_for_group (ip4_address_t * a, + ip_multicast_group_t g) { ASSERT ((u32) g < (1 << 28)); a->as_u32 = clib_host_to_net_u32 ((0xe << 28) + g); @@ -325,3 +374,11 @@ ip4_tcp_reply_x2 (ip4_header_t * ip0, ip4_header_t * ip1, } #endif /* included_ip4_packet_h */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |