122 lines
3.3 KiB
C++
122 lines
3.3 KiB
C++
#include "tuple.h"
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#include "uthash.h"
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#include "packet_ldbc.h"
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#include "packet_utils.h"
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uint64_t packet_ldbc_hash(const struct packet *pkt, enum load_balance ldbc, enum packet_direction direction)
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{
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uint64_t temp = 0;
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uint64_t hash_value = 1;
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int inner_addr_len = 0;
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int outer_addr_len = 0;
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const char *inner_src_addr = NULL;
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const char *inner_dst_addr = NULL;
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const char *outer_src_addr = NULL;
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const char *outer_dst_addr = NULL;
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struct tuple2 inner_addr;
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struct tuple2 outer_addr;
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if (pkt == NULL)
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{
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return hash_value;
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}
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if (packet_get_innermost_tuple2(pkt, &inner_addr) == -1)
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{
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return hash_value;
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}
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if (packet_get_outermost_tuple2(pkt, &outer_addr) == -1)
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{
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return hash_value;
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}
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if (inner_addr.ip_type == IP_TYPE_V4)
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{
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inner_src_addr = (const char *)&inner_addr.src_addr.v4;
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inner_dst_addr = (const char *)&inner_addr.dst_addr.v4;
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inner_addr_len = sizeof(struct in_addr);
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}
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else
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{
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inner_src_addr = (const char *)&inner_addr.src_addr.v6;
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inner_dst_addr = (const char *)&inner_addr.dst_addr.v6;
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inner_addr_len = sizeof(struct in6_addr);
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}
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if (outer_addr.ip_type == IP_TYPE_V4)
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{
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outer_src_addr = (const char *)&outer_addr.src_addr.v4;
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outer_dst_addr = (const char *)&outer_addr.dst_addr.v4;
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outer_addr_len = sizeof(struct in_addr);
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}
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else
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{
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outer_src_addr = (const char *)&outer_addr.src_addr.v6;
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outer_dst_addr = (const char *)&outer_addr.dst_addr.v6;
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outer_addr_len = sizeof(struct in6_addr);
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}
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switch (ldbc)
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{
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case LDBC_HASH_OUTERMOST_INT_IP:
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if (direction == PACKET_DIRECTION_INCOMING)
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{
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// direction 1: E2I
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HASH_VALUE(outer_dst_addr, outer_addr_len, hash_value);
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}
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else
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{
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// direction 0: I2E
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HASH_VALUE(outer_src_addr, outer_addr_len, hash_value);
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}
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break;
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case LDBC_HASH_OUTERMOST_EXT_IP:
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if (direction == PACKET_DIRECTION_INCOMING)
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{
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// direction 1: E2I
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HASH_VALUE(outer_src_addr, outer_addr_len, hash_value);
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}
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else
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{
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// direction 0: I2E
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HASH_VALUE(outer_dst_addr, outer_addr_len, hash_value);
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}
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break;
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case LDBC_HASH_OUTERMOST_INT_EXT_IP:
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HASH_VALUE(outer_src_addr, outer_addr_len, hash_value);
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HASH_VALUE(outer_dst_addr, outer_addr_len, temp);
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hash_value = hash_value ^ temp;
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break;
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case LDBC_HASH_INNERMOST_INT_IP:
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if (direction == PACKET_DIRECTION_INCOMING)
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{
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// direction 1: E2I
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HASH_VALUE(inner_dst_addr, inner_addr_len, hash_value);
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}
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else
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{
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// direction 0: I2E
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HASH_VALUE(inner_src_addr, inner_addr_len, hash_value);
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}
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break;
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case LDBC_HASH_INNERMOST_EXT_IP:
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if (direction == PACKET_DIRECTION_INCOMING)
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{
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// direction 1: E2I
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HASH_VALUE(inner_src_addr, inner_addr_len, hash_value);
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}
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else
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{
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// direction 0: I2E
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HASH_VALUE(inner_dst_addr, inner_addr_len, hash_value);
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}
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break;
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default:
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return hash_value;
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}
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return hash_value;
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} |