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util: Helper for formatting MAC addresses

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There are a couple of places where we somewhat messily open code formatting
an Ethernet like MAC address for display.  Add an eth_ntop() helper for
this.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2024-08-21 14:19:58 +10:00 • committed by Stefano Brivio
parent e6feb5a892
commit 066e69986b
4 changed files with 27 additions and 7 deletions

5
dhcp.c
View file

@ -276,6 +276,7 @@ static void opt_set_dns_search(const struct ctx *c, size_t max_len)
int dhcp(const struct ctx *c, const struct pool *p)
{
size_t mlen, dlen, offset = 0, opt_len, opt_off = 0;
char macstr[ETH_ADDRSTRLEN];
const struct ethhdr *eh;
const struct iphdr *iph;
const struct udphdr *uh;
@ -340,9 +341,7 @@ int dhcp(const struct ctx *c, const struct pool *p)
return -1;
}
info(" from %02x:%02x:%02x:%02x:%02x:%02x",
m->chaddr[0], m->chaddr[1], m->chaddr[2],
m->chaddr[3], m->chaddr[4], m->chaddr[5]);
info(" from %s", eth_ntop(m->chaddr, macstr, sizeof(macstr)));
m->yiaddr = c->ip4.addr;
mask.s_addr = htonl(0xffffffff << (32 - c->ip4.prefix_len));