TSG-18285 TFE的Packet IO模块支持重复流量识别

common/include/ipv4_helpers.h

@@ -0,0 +1,71 @@
+#ifndef _IPV4_HELPERS_H
+#define _IPV4_HELPERS_H
+
+#ifdef __cpluscplus
+extern "C"
+{
+#endif
+
+#include <arpa/inet.h>
+#include <netinet/ip.h>
+
+static inline uint16_t ipv4_hdr_get_ipid(const struct ip *hdr)
+{
+    return ntohs(hdr->ip_id);
+}
+
+static inline uint8_t ipv4_hdr_get_flags(const struct ip *hdr)
+{
+    return (ntohs(hdr->ip_off) & IP_OFFMASK) >> 13;
+}
+
+static inline uint16_t ipv4_hdr_get_frag_offset(const struct ip *hdr)
+{
+    return ntohs(hdr->ip_off) & IP_OFFMASK;
+}
+
+static inline uint8_t ipv4_hdr_get_ttl(const struct ip *hdr)
+{
+    return hdr->ip_ttl;
+}
+
+static inline uint8_t ipv4_hdr_get_protocol(const struct ip *hdr)
+{
+    return hdr->ip_p;
+}
+
+static inline uint16_t ipv4_hdr_get_checksum(const struct ip *hdr)
+{
+    return ntohs(hdr->ip_sum);
+}
+
+static inline uint32_t ipv4_hdr_get_src(const struct ip *hdr)
+{
+    return ntohl(hdr->ip_src.s_addr);
+}
+
+static inline uint32_t ipv4_hdr_get_dst(const struct ip *hdr)
+{
+    return ntohl(hdr->ip_dst.s_addr);
+}
+
+static inline bool ipv4_hdr_has_flag_rf(const struct ip *hdr)
+{
+    return (ntohs(hdr->ip_off) & IP_RF) != 0;
+}
+
+static inline bool ipv4_hdr_has_flag_df(const struct ip *hdr)
+{
+    return (ntohs(hdr->ip_off) & IP_DF) != 0;
+}
+
+static inline bool ipv4_hdr_has_flag_mf(const struct ip *hdr)
+{
+    return (ntohs(hdr->ip_off) & IP_MF) != 0;
+}
+
+#ifdef __cpluscplus
+}
+#endif
+
+#endif