slirp: Rename "struct arphdr" to "struct slirp_arphdr"

struct arphdr is already used by the system headers on OpenBSD
and thus QEMU does not compile here anymore. Fix it by renaming
our struct to slirp_arphdr instead.

Reported-by: Brad Smith
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-id: 1471249494-17392-1-git-send-email-thuth@redhat.com
Buglink: https://bugs.launchpad.net/qemu/+bug/1613133
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

slirp/slirp.c

@@ -773,10 +773,10 @@ void slirp_pollfds_poll(GArray *pollfds, int select_error)
 
 static void arp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
 {
-    struct arphdr *ah = (struct arphdr *)(pkt + ETH_HLEN);
-    uint8_t arp_reply[max(ETH_HLEN + sizeof(struct arphdr), 64)];
+    struct slirp_arphdr *ah = (struct slirp_arphdr *)(pkt + ETH_HLEN);
+    uint8_t arp_reply[max(ETH_HLEN + sizeof(struct slirp_arphdr), 64)];
     struct ethhdr *reh = (struct ethhdr *)arp_reply;
-    struct arphdr *rah = (struct arphdr *)(arp_reply + ETH_HLEN);
+    struct slirp_arphdr *rah = (struct slirp_arphdr *)(arp_reply + ETH_HLEN);
     int ar_op;
     struct ex_list *ex_ptr;
 
@@ -890,9 +890,9 @@ static int if_encap4(Slirp *slirp, struct mbuf *ifm, struct ethhdr *eh,
         return 1;
     }
     if (!arp_table_search(slirp, iph->ip_dst.s_addr, ethaddr)) {
-        uint8_t arp_req[ETH_HLEN + sizeof(struct arphdr)];
+        uint8_t arp_req[ETH_HLEN + sizeof(struct slirp_arphdr)];
         struct ethhdr *reh = (struct ethhdr *)arp_req;
-        struct arphdr *rah = (struct arphdr *)(arp_req + ETH_HLEN);
+        struct slirp_arphdr *rah = (struct slirp_arphdr *)(arp_req + ETH_HLEN);
 
         if (!ifm->resolution_requested) {
             /* If the client addr is not known, send an ARP request */

slirp/slirp.h

@@ -105,7 +105,7 @@ struct ethhdr {
     unsigned short h_proto;            /* packet type ID field */
 };
 
-struct arphdr {
+struct slirp_arphdr {
     unsigned short ar_hrd;      /* format of hardware address */
     unsigned short ar_pro;      /* format of protocol address */
     unsigned char  ar_hln;      /* length of hardware address */
@@ -124,7 +124,7 @@ struct arphdr {
 #define ARP_TABLE_SIZE 16
 
 typedef struct ArpTable {
-    struct arphdr table[ARP_TABLE_SIZE];
+    struct slirp_arphdr table[ARP_TABLE_SIZE];
     int next_victim;
 } ArpTable;