doc: add Meson coding style to contributors guide

[dpdk.git] / lib / librte_net / rte_ether.h

diff --git a/lib/librte_net/rte_ether.h b/lib/librte_net/rte_ether.h
index e942556..a303c24 100644 (file)
--- a/lib/librte_net/rte_ether.h
+++ b/lib/librte_net/rte_ether.h
@@ -146,10 +146,9 @@ static inline int rte_is_multicast_ether_addr(const struct rte_ether_addr *ea)
  */
 static inline int rte_is_broadcast_ether_addr(const struct rte_ether_addr *ea)
 {
-       const uint16_t *ea_words = (const uint16_t *)ea;
+       const uint16_t *w = (const uint16_t *)ea;
 
-       return (ea_words[0] == 0xFFFF && ea_words[1] == 0xFFFF &&
-               ea_words[2] == 0xFFFF);
+       return (w[0] & w[1] & w[2]) == 0xFFFF;
 }
 
 /**
@@ -208,29 +207,18 @@ void
 rte_eth_random_addr(uint8_t *addr);
 
 /**
- * Fast copy an Ethernet address.
+ * Copy an Ethernet address.
  *
  * @param ea_from
  *   A pointer to a ether_addr structure holding the Ethernet address to copy.
  * @param ea_to
  *   A pointer to a ether_addr structure where to copy the Ethernet address.
  */
-static inline void rte_ether_addr_copy(const struct rte_ether_addr *ea_from,
-                                  struct rte_ether_addr *ea_to)
+static inline void
+rte_ether_addr_copy(const struct rte_ether_addr *__restrict ea_from,
+                   struct rte_ether_addr *__restrict ea_to)
 {
-#ifdef __INTEL_COMPILER
-       uint16_t *from_words = (uint16_t *)(ea_from->addr_bytes);
-       uint16_t *to_words   = (uint16_t *)(ea_to->addr_bytes);
-
-       to_words[0] = from_words[0];
-       to_words[1] = from_words[1];
-       to_words[2] = from_words[2];
-#else
-       /*
-        * Use the common way, because of a strange gcc warning.
-        */
        *ea_to = *ea_from;
-#endif
 }
 
 #define RTE_ETHER_ADDR_FMT_SIZE         18
@@ -265,16 +253,34 @@ __rte_experimental
 int
 rte_ether_unformat_addr(const char *str, struct rte_ether_addr *eth_addr);
 
+/* Windows Sockets headers contain `#define s_addr S_un.S_addr`.
+ * Temporarily disable this macro to avoid conflict at definition.
+ * Place source MAC address in both `s_addr` and `S_un.S_addr` fields,
+ * so that access works either directly or through the macro.
+ */
+#pragma push_macro("s_addr")
+#ifdef s_addr
+#undef s_addr
+#endif
+
 /**
  * Ethernet header: Contains the destination address, source address
  * and frame type.
  */
 struct rte_ether_hdr {
        struct rte_ether_addr d_addr; /**< Destination address. */
-       struct rte_ether_addr s_addr; /**< Source address. */
-       uint16_t ether_type;      /**< Frame type. */
+       RTE_STD_C11
+       union {
+               struct rte_ether_addr s_addr; /**< Source address. */
+               struct {
+                       struct rte_ether_addr S_addr;
+               } S_un; /**< Do not use directly; use s_addr instead.*/
+       };
+       uint16_t ether_type; /**< Frame type. */
 } __rte_aligned(2);
 
+#pragma pop_macro("s_addr")
+
 /**
  * Ethernet VLAN Header.
  * Contains the 16-bit VLAN Tag Control Identifier and the Ethernet type
@@ -307,6 +313,7 @@ struct rte_vlan_hdr {
 #define RTE_ETHER_TYPE_LLDP 0x88CC /**< LLDP Protocol. */
 #define RTE_ETHER_TYPE_MPLS 0x8847 /**< MPLS ethertype. */
 #define RTE_ETHER_TYPE_MPLSM 0x8848 /**< MPLS multicast ethertype. */
+#define RTE_ETHER_TYPE_ECPRI 0xAEFE /**< eCPRI ethertype (.1Q supported). */
 
 /**
  * Extract VLAN tag information into mbuf
@@ -360,6 +367,10 @@ static inline int rte_vlan_insert(struct rte_mbuf **m)
        if (!RTE_MBUF_DIRECT(*m) || rte_mbuf_refcnt_read(*m) > 1)
                return -EINVAL;
 
+       /* Can't insert header if the first segment is too short */
+       if (rte_pktmbuf_data_len(*m) < 2 * RTE_ETHER_ADDR_LEN)
+               return -EINVAL;
+
        oh = rte_pktmbuf_mtod(*m, struct rte_ether_hdr *);
        nh = (struct rte_ether_hdr *)
                rte_pktmbuf_prepend(*m, sizeof(struct rte_vlan_hdr));