gfwleak/tango-tsg-service-chaining-engine
Archived
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

perf: Optimize IPID (Avoid the futex of rand() while ensuring that IPID increases monotonically)

Browse Source
This commit is contained in:
luwenpeng
2023-10-11 18:11:48 +08:00
parent db517610e0
commit 49ccb5149f
5 changed files with 15 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
common/include/utils.h
View File

@@ -105,7 +105,7 @@ struct udp_hdr
} __attribute__((__packed__));
void build_udp_header(const char *l3_hdr, int l3_hdr_len, struct udp_hdr *udp_hdr, uint16_t udp_sport, uint16_t udp_dport, int payload_len);
void build_ip_header(struct ip *ip_hdr, uint8_t next_protocol, const char *src_addr, const char *dst_addr, uint16_t payload_len);
void build_ip_header(struct ip *ip_hdr, uint8_t next_protocol, uint16_t ipid, const char *src_addr, const char *dst_addr, uint16_t payload_len);
void build_ether_header(struct ethhdr *eth_hdr, uint16_t next_protocol, const char *src_mac, const char *dst_mac);
/******************************************************************************

14
common/src/utils.cpp
View File

@@ -196,16 +196,16 @@ void build_udp_header(const char *l3_hdr, int l3_hdr_len, struct udp_hdr *udp_hd
udp_hdr->uh_sum = CHECKSUM_CARRY(sum);
}
void build_ip_header(struct ip *ip_hdr, uint8_t next_protocol, const char *src_addr, const char *dst_addr, uint16_t payload_len)
void build_ip_header(struct ip *ip_hdr, uint8_t next_protocol, uint16_t ipid, const char *src_addr, const char *dst_addr, uint16_t payload_len)
{
memset(ip_hdr, 0, sizeof(struct ip));
ip_hdr->ip_hl = 5; /* 20 byte header */
ip_hdr->ip_v = 4; /* version 4 */
ip_hdr->ip_tos = 0; /* IP tos */
ip_hdr->ip_id = htons(random()); /* IP ID */
ip_hdr->ip_ttl = 80; /* time to live */
ip_hdr->ip_p = next_protocol; /* transport protocol */
ip_hdr->ip_hl = 5; /* 20 byte header */
ip_hdr->ip_v = 4; /* version 4 */
ip_hdr->ip_tos = 0; /* IP tos */
ip_hdr->ip_id = htons(ipid); /* IP ID */
ip_hdr->ip_ttl = 80; /* time to live */
ip_hdr->ip_p = next_protocol; /* transport protocol */
ip_hdr->ip_src.s_addr = inet_addr(src_addr);
ip_hdr->ip_dst.s_addr = inet_addr(dst_addr);
ip_hdr->ip_len = htons(sizeof(struct ip) + payload_len); /* total length */