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Separate IPv4 and IPv6 configuration

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After recent changes, conf_ip() now has essentially entirely disjoint paths
for IPv4 and IPv6 configuration.  So, it's cleaner to split them out into
different functions conf_ip4() and conf_ip6().

Splitting these out also lets us make the interface a bit nicer, having
them return success or failure directly, rather than manipulating c->v4
and c->v6 to indicate success/failure of the two versions.

Since these functions may also initialize the interface index for each
protocol, it turns out we can then drop c->v4 and c->v6 entirely, replacing
tests on those with tests on whether c->ifi4 or c->ifi6 is non-zero (since
a 0 interface index is never valid).

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
[sbrivio: Whitespace fixes]
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson
2022-07-22 15:31:17 +10:00
committed by Stefano Brivio
parent c984ee5afd
commit 5e12d23acb
7 changed files with 108 additions and 100 deletions
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4
pasta.c
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@@ -195,14 +195,14 @@ void pasta_ns_conf(struct ctx *c)
nl_link(1, c->pasta_ifi, c->mac_guest, 1, c->mtu);
if (c->v4) {
if (c->ifi4) {
prefix_len = __builtin_popcount(c->mask4);
nl_addr(1, c->pasta_ifi, AF_INET, &c->addr4,
&prefix_len, NULL);
nl_route(1, c->pasta_ifi, AF_INET, &c->gw4);
}
if (c->v6) {
if (c->ifi6) {
prefix_len = 64;
nl_addr(1, c->pasta_ifi, AF_INET6, &c->addr6,
&prefix_len, NULL);