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tcp: Separate helpers to create ns listening sockets

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tcp_sock_init*() can create either sockets listening on the host, or in
the pasta network namespace (with @ns==1).  There are, however, a number
of differences in how these two cases work in practice though.  "ns"
sockets are only used in pasta mode, and they always lead to spliced
connections only.  The functions are also only ever called in "ns" mode
with a NULL address and interface name, and it doesn't really make sense
for them to be called any other way.

Later changes will introduce further differences in behaviour between these
two cases, so it makes more sense to use separate functions for creating
the ns listening sockets than the regular external/host listening sockets.

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 2022-11-17 16:58:50 +11:00 • committed by Stefano Brivio
parent 433604a581
commit 73d3a3e84e
3 changed files with 93 additions and 49 deletions

6
conf.c
View file

@ -209,7 +209,7 @@ static int conf_ports(const struct ctx *c, char optname, const char *optarg,
for (i = 0; i < PORT_EPHEMERAL_MIN; i++) {
if (optname == 't')
tcp_sock_init(c, 0, AF_UNSPEC, NULL, NULL, i);
tcp_sock_init(c, AF_UNSPEC, NULL, NULL, i);
else if (optname == 'u')
udp_sock_init(c, 0, AF_UNSPEC, NULL, NULL, i);
}
@ -287,7 +287,7 @@ static int conf_ports(const struct ctx *c, char optname, const char *optarg,
bitmap_set(fwd->map, i);
if (optname == 't')
tcp_sock_init(c, 0, af, addr, ifname, i);
tcp_sock_init(c, af, addr, ifname, i);
else if (optname == 'u')
udp_sock_init(c, 0, af, addr, ifname, i);
}
@ -333,7 +333,7 @@ static int conf_ports(const struct ctx *c, char optname, const char *optarg,
fwd->delta[i] = mapped_range.first - orig_range.first;
if (optname == 't')
tcp_sock_init(c, 0, af, addr, ifname, i);
tcp_sock_init(c, af, addr, ifname, i);
else if (optname == 'u')
udp_sock_init(c, 0, af, addr, ifname, i);
}