#define included_ip4_packet_h
#include <vnet/ip/ip_packet.h> /* for ip_csum_t */
-#include <vnet/tcp/tcp_packet.h> /* for tcp_header_t */
#include <vppinfra/byte_order.h> /* for clib_net_to_host_u16 */
+#include <vppinfra/warnings.h> /* for WARN_OFF/WARN_ON macro */
/* IP4 address which can be accessed either as 4 bytes
or as a 32-bit number. */
/* 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. */
return (void *) i + ip4_header_bytes (i);
}
-always_inline u16
-ip4_header_checksum (ip4_header_t * i)
+/* Turn off array bounds check due to ip4_header_t
+ option field operations. */
+
+WARN_OFF(array-bounds)
+
+static_always_inline u16
+ip4_header_checksum_inline (ip4_header_t * i, int with_checksum)
{
- u16 *iphdr = (u16 *) i;
- u32 sum = 0;
int option_len = (i->ip_version_and_header_length & 0xf) - 5;
+ uword sum = 0;
+#if uword_bits == 64
+ u32 *iphdr = (u32 *) i;
+
+ sum += iphdr[0];
+ sum += iphdr[1];
+ sum += with_checksum ? iphdr[2] : *(u16 *) (iphdr + 2);
+ /* skip checksum */
+ sum += iphdr[3];
+ sum += iphdr[4];
+
+ if (PREDICT_FALSE (option_len > 0))
+ switch (option_len)
+ {
+ case 10:
+ sum += iphdr[14];
+ case 9:
+ sum += iphdr[13];
+ case 8:
+ sum += iphdr[12];
+ case 7:
+ sum += iphdr[11];
+ case 6:
+ sum += iphdr[10];
+ case 5:
+ sum += iphdr[9];
+ case 4:
+ sum += iphdr[8];
+ case 3:
+ sum += iphdr[7];
+ case 2:
+ sum += iphdr[6];
+ case 1:
+ sum += iphdr[5];
+ default:
+ break;
+ }
- sum += clib_net_to_host_u16 (iphdr[0]);
- sum += clib_net_to_host_u16 (iphdr[1]);
- sum += clib_net_to_host_u16 (iphdr[2]);
- sum += clib_net_to_host_u16 (iphdr[3]);
- sum += clib_net_to_host_u16 (iphdr[4]);
+ sum = ((u32) sum) + (sum >> 32);
+#else
+ u16 *iphdr = (u16 *) i;
- sum += clib_net_to_host_u16 (iphdr[6]);
- sum += clib_net_to_host_u16 (iphdr[7]);
- sum += clib_net_to_host_u16 (iphdr[8]);
- sum += clib_net_to_host_u16 (iphdr[9]);
+ sum += iphdr[0];
+ sum += iphdr[1];
+ sum += iphdr[2];
+ sum += iphdr[3];
+ sum += iphdr[4];
+ if (with_checksum)
+ sum += iphdr[5];
+ sum += iphdr[6];
+ sum += iphdr[7];
+ sum += iphdr[8];
+ sum += iphdr[9];
if (PREDICT_FALSE (option_len > 0))
switch (option_len)
{
case 10:
- sum += clib_net_to_host_u16 (iphdr[28]);
- sum += clib_net_to_host_u16 (iphdr[29]);
+ sum += iphdr[28];
+ sum += iphdr[29];
case 9:
- sum += clib_net_to_host_u16 (iphdr[26]);
- sum += clib_net_to_host_u16 (iphdr[27]);
+ sum += iphdr[26];
+ sum += iphdr[27];
case 8:
- sum += clib_net_to_host_u16 (iphdr[24]);
- sum += clib_net_to_host_u16 (iphdr[25]);
+ sum += iphdr[24];
+ sum += iphdr[25];
case 7:
- sum += clib_net_to_host_u16 (iphdr[22]);
- sum += clib_net_to_host_u16 (iphdr[23]);
+ sum += iphdr[22];
+ sum += iphdr[23];
case 6:
- sum += clib_net_to_host_u16 (iphdr[20]);
- sum += clib_net_to_host_u16 (iphdr[21]);
+ sum += iphdr[20];
+ sum += iphdr[21];
case 5:
- sum += clib_net_to_host_u16 (iphdr[18]);
- sum += clib_net_to_host_u16 (iphdr[19]);
+ sum += iphdr[18];
+ sum += iphdr[19];
case 4:
- sum += clib_net_to_host_u16 (iphdr[16]);
- sum += clib_net_to_host_u16 (iphdr[17]);
+ sum += iphdr[16];
+ sum += iphdr[17];
case 3:
- sum += clib_net_to_host_u16 (iphdr[14]);
- sum += clib_net_to_host_u16 (iphdr[15]);
+ sum += iphdr[14];
+ sum += iphdr[15];
case 2:
- sum += clib_net_to_host_u16 (iphdr[12]);
- sum += clib_net_to_host_u16 (iphdr[13]);
+ sum += iphdr[12];
+ sum += iphdr[13];
case 1:
- sum += clib_net_to_host_u16 (iphdr[10]);
- sum += clib_net_to_host_u16 (iphdr[11]);
+ sum += iphdr[10];
+ sum += iphdr[11];
default:
break;
}
+#endif
sum = ((u16) sum) + (sum >> 16);
sum = ((u16) sum) + (sum >> 16);
- return clib_host_to_net_u16 (~((u16) sum));
+ return ~((u16) sum);
+}
+
+WARN_ON(array-bounds)
+
+always_inline u16
+ip4_header_checksum (ip4_header_t * i)
+{
+ return ip4_header_checksum_inline (i, /* with_checksum */ 0);
}
always_inline void
return (ip4->tos & IP_PACKET_TC_FIELD_ECN_MASK);
}
+always_inline u8
+ip4_header_get_ttl (const ip4_header_t *ip4)
+{
+ return (ip4->ttl);
+}
+
+always_inline void
+ip4_header_set_ttl (ip4_header_t *ip4, u8 ttl)
+{
+ ip4->ttl = ttl;
+}
+
always_inline void
ip4_header_set_df (ip4_header_t * ip4)
{
static inline uword
ip4_header_checksum_is_valid (ip4_header_t * i)
{
- return i->checksum == ip4_header_checksum (i);
+ return ip4_header_checksum_inline (i, /* with_checksum */ 1) == 0;
}
#define ip4_partial_header_checksum_x1(ip0,sum0) \
ethernet_address[5] = d[3];
}
-always_inline void
-ip4_tcp_reply_x1 (ip4_header_t * ip0, tcp_header_t * tcp0)
-{
- u32 src0, dst0;
-
- src0 = ip0->src_address.data_u32;
- dst0 = ip0->dst_address.data_u32;
- ip0->src_address.data_u32 = dst0;
- ip0->dst_address.data_u32 = src0;
-
- src0 = tcp0->src;
- dst0 = tcp0->dst;
- tcp0->src = dst0;
- tcp0->dst = src0;
-}
-
-always_inline void
-ip4_tcp_reply_x2 (ip4_header_t * ip0, ip4_header_t * ip1,
- tcp_header_t * tcp0, tcp_header_t * tcp1)
-{
- u32 src0, dst0, src1, dst1;
-
- src0 = ip0->src_address.data_u32;
- src1 = ip1->src_address.data_u32;
- dst0 = ip0->dst_address.data_u32;
- dst1 = ip1->dst_address.data_u32;
- ip0->src_address.data_u32 = dst0;
- ip1->src_address.data_u32 = dst1;
- ip0->dst_address.data_u32 = src0;
- ip1->dst_address.data_u32 = src1;
-
- src0 = tcp0->src;
- src1 = tcp1->src;
- dst0 = tcp0->dst;
- dst1 = tcp1->dst;
- tcp0->src = dst0;
- tcp1->src = dst1;
- tcp0->dst = src0;
- tcp1->dst = src1;
-}
-
#endif /* included_ip4_packet_h */
/*
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