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udhcpc6: code shrink

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function                                             old     new   delta
d6_read_interface                                    593     582     -11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2019-04-14 17:01:10 +02:00
parent 0d75e8b797
commit 60bf77f7e7
3 changed files with 18 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
networking/udhcp/d6_socket.c
View File

@ -10,7 +10,11 @@
#include <ifaddrs.h>
#include <netpacket/packet.h>
int FAST_FUNC d6_read_interface(const char *interface, int *ifindex, struct in6_addr *nip6, uint8_t *mac)
int FAST_FUNC d6_read_interface(
const char *interface,
int *ifindex,
struct in6_addr *nip6,
uint8_t *mac)
{
int retval = 3;
struct ifaddrs *ifap, *ifa;
@ -22,12 +26,12 @@ int FAST_FUNC d6_read_interface(const char *interface, int *ifindex, struct in6_
if (!ifa->ifa_addr || (strcmp(ifa->ifa_name, interface) != 0))
continue;
sip6 = (struct sockaddr_in6*)(ifa->ifa_addr);
if (ifa->ifa_addr->sa_family == AF_PACKET) {
struct sockaddr_ll *sll = (struct sockaddr_ll*)(ifa->ifa_addr);
struct sockaddr_ll *sll = (void*)(ifa->ifa_addr);
memcpy(mac, sll->sll_addr, 6);
log2("MAC %02x:%02x:%02x:%02x:%02x:%02x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
log2("MAC %02x:%02x:%02x:%02x:%02x:%02x",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]
);
*ifindex = sll->sll_ifindex;
log2("ifindex %d", *ifindex);
retval &= (3 - (1<<0));
@ -47,6 +51,8 @@ int FAST_FUNC d6_read_interface(const char *interface, int *ifindex, struct in6_
* is requesting configuration information as the source address in the
* header of the IP datagram."
*/
sip6 = (void*)(ifa->ifa_addr);
if (ifa->ifa_addr->sa_family == AF_INET6
&& IN6_IS_ADDR_LINKLOCAL(&sip6->sin6_addr)
) {
@ -96,7 +102,7 @@ int FAST_FUNC d6_read_interface(const char *interface, int *ifindex, struct in6_
bb_error_msg("can't get %s", "MAC");
if (retval & (1<<1))
bb_error_msg("can't get %s", "link-local IPv6 address");
return -1;
return retval;
}
int FAST_FUNC d6_listen_socket(int port, const char *inf)