sd-bus: rework ELF error mapping table magic

[elogind.git] / src / libsystemd-network / ipv4ll-network.c

diff --git a/src/libsystemd-network/ipv4ll-network.c b/src/libsystemd-network/ipv4ll-network.c
index 0852f42c3a8291cb11b88af894b7fce3099dba04..93ffed408f3e0ec35444d1f8152ca3f5cef67b1f 100644 (file)
--- a/src/libsystemd-network/ipv4ll-network.c
+++ b/src/libsystemd-network/ipv4ll-network.c
@@ -37,32 +37,33 @@ int arp_network_send_raw_socket(int fd, const union sockaddr_union *link,
         return 0;
 }
 
-int arp_network_bind_raw_socket(int index, union sockaddr_union *link) {
-        struct sock_filter filter[] = {
-            BPF_STMT(BPF_LD + BPF_W + BPF_LEN, 0),                                         /* A <- packet length */
-            BPF_JUMP(BPF_JMP + BPF_JGE + BPF_K, sizeof(struct ether_arp), 1, 0),           /* packet >= arp packet ? */
-            BPF_STMT(BPF_RET + BPF_K, 0),                                                  /* ignore */
-            BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct ether_arp, ea_hdr.ar_hrd)), /* A <- header */
-            BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ARPHRD_ETHER, 1, 0),                       /* header == ethernet ? */
-            BPF_STMT(BPF_RET + BPF_K, 0),                                                  /* ignore */
-            BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct ether_arp, ea_hdr.ar_pro)), /* A <- protocol */
-            BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ETHERTYPE_IP, 1, 0),                       /* protocol == IP ? */
-            BPF_STMT(BPF_RET + BPF_K, 0),                                                  /* ignore */
-            BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct ether_arp, ea_hdr.ar_op)),  /* A <- operation */
-            BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ARPOP_REQUEST, 0, 1),                      /* protocol == request ? */
-            BPF_STMT(BPF_RET + BPF_K, 65535),                                              /* return all */
-            BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ARPOP_REPLY, 0, 1),                        /* protocol == reply ? */
-            BPF_STMT(BPF_RET + BPF_K, 65535),                                              /* return all */
-            BPF_STMT(BPF_RET + BPF_K, 0),                                                  /* ignore */
+int arp_network_bind_raw_socket(int ifindex, union sockaddr_union *link) {
+
+        static const struct sock_filter filter[] = {
+                BPF_STMT(BPF_LD + BPF_W + BPF_LEN, 0),                                         /* A <- packet length */
+                BPF_JUMP(BPF_JMP + BPF_JGE + BPF_K, sizeof(struct ether_arp), 1, 0),           /* packet >= arp packet ? */
+                BPF_STMT(BPF_RET + BPF_K, 0),                                                  /* ignore */
+                BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct ether_arp, ea_hdr.ar_hrd)), /* A <- header */
+                BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ARPHRD_ETHER, 1, 0),                       /* header == ethernet ? */
+                BPF_STMT(BPF_RET + BPF_K, 0),                                                  /* ignore */
+                BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct ether_arp, ea_hdr.ar_pro)), /* A <- protocol */
+                BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ETHERTYPE_IP, 1, 0),                       /* protocol == IP ? */
+                BPF_STMT(BPF_RET + BPF_K, 0),                                                  /* ignore */
+                BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct ether_arp, ea_hdr.ar_op)),  /* A <- operation */
+                BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ARPOP_REQUEST, 0, 1),                      /* protocol == request ? */
+                BPF_STMT(BPF_RET + BPF_K, 65535),                                              /* return all */
+                BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ARPOP_REPLY, 0, 1),                        /* protocol == reply ? */
+                BPF_STMT(BPF_RET + BPF_K, 65535),                                              /* return all */
+                BPF_STMT(BPF_RET + BPF_K, 0),                                                  /* ignore */
         };
         struct sock_fprog fprog = {
-            .len = ELEMENTSOF(filter),
-            .filter = filter
+                .len = ELEMENTSOF(filter),
+                .filter = (struct sock_filter*) filter
         };
         _cleanup_close_ int s = -1;
         int r;
 
-        assert(index > 0);
+        assert(ifindex > 0);
         assert(link);
 
         s = socket(PF_PACKET, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0);
@@ -75,7 +76,7 @@ int arp_network_bind_raw_socket(int index, union sockaddr_union *link) {
 
         link->ll.sll_family = AF_PACKET;
         link->ll.sll_protocol = htons(ETH_P_ARP);
-        link->ll.sll_ifindex = index;
+        link->ll.sll_ifindex = ifindex;
         link->ll.sll_halen = ETH_ALEN;
         memset(link->ll.sll_addr, 0xff, ETH_ALEN);