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udp: Remove rdelta port forwarding maps

Browse source 
In addition to the struct fwd_ports used by both UDP and TCP to track
port forwarding, UDP also included an 'rdelta' field, which contained the
reverse mapping of the main port map.  This was used so that we could
properly direct reply packets to a forwarded packet where we change the
destination port.  This has now been taken over by the flow table: reply
packets will match the flow of the originating packet, and that gives the
correct ports on the originating side.

So, eliminate the rdelta field, and with it struct udp_fwd_ports, which
now has no additional information over struct fwd_ports.

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 2024-07-18 15:26:52 +10:00 • committed by Stefano Brivio
parent d89b3aa097
commit d29fa0856e
4 changed files with 27 additions and 67 deletions

14
conf.c
View file

@ -1248,7 +1248,7 @@ void conf(struct ctx *c, int argc, char **argv)
}
c->tcp.fwd_in.mode = c->tcp.fwd_out.mode = FWD_UNSET;
c->udp.fwd_in.f.mode = c->udp.fwd_out.f.mode = FWD_UNSET;
c->udp.fwd_in.mode = c->udp.fwd_out.mode = FWD_UNSET;
do {
name = getopt_long(argc, argv, optstring, options, NULL);
@ -1664,7 +1664,7 @@ void conf(struct ctx *c, int argc, char **argv)
if (name == 't')
conf_ports(c, name, optarg, &c->tcp.fwd_in);
else if (name == 'u')
conf_ports(c, name, optarg, &c->udp.fwd_in.f);
conf_ports(c, name, optarg, &c->udp.fwd_in);
} while (name != -1);
if (c->mode == MODE_PASTA)
@ -1699,7 +1699,7 @@ void conf(struct ctx *c, int argc, char **argv)
if (name == 'T')
conf_ports(c, name, optarg, &c->tcp.fwd_out);
else if (name == 'U')
conf_ports(c, name, optarg, &c->udp.fwd_out.f);
conf_ports(c, name, optarg, &c->udp.fwd_out);
} while (name != -1);
if (!c->ifi4)
@ -1726,10 +1726,10 @@ void conf(struct ctx *c, int argc, char **argv)
c->tcp.fwd_in.mode = fwd_default;
if (!c->tcp.fwd_out.mode)
c->tcp.fwd_out.mode = fwd_default;
if (!c->udp.fwd_in.f.mode)
c->udp.fwd_in.f.mode = fwd_default;
if (!c->udp.fwd_out.f.mode)
c->udp.fwd_out.f.mode = fwd_default;
if (!c->udp.fwd_in.mode)
c->udp.fwd_in.mode = fwd_default;
if (!c->udp.fwd_out.mode)
c->udp.fwd_out.mode = fwd_default;
fwd_scan_ports_init(c);