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Updated the multihop forwarding interface to match the intended operation of the module: to let the user produce the route, and the mh module only does the forwarding

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This commit is contained in:
adamdunkels 2007-11-28 19:55:27 +00:00
parent d9bda3bc80
commit 6e739853f7
2 changed files with 30 additions and 41 deletions
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61
core/net/rime/mh.c
View file

@ -33,7 +33,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: mh.c,v 1.3 2007/03/31 18:31:28 adamdunkels Exp $
* $Id: mh.c,v 1.4 2007/11/28 19:55:27 adamdunkels Exp $
*/
/**
@ -63,27 +63,13 @@ struct data_hdr {
#define PRINTF(...)
#endif
/*---------------------------------------------------------------------------*/
static void
send_data(struct mh_conn *c, rimeaddr_t *to, struct route_entry *next)
{
struct data_hdr *hdr;
if(rimebuf_hdralloc(sizeof(struct data_hdr))) {
hdr = rimebuf_hdrptr();
rimeaddr_copy(&hdr->dest, to);
rimeaddr_copy(&hdr->originator, &rimeaddr_node_addr);
uc_send(&c->c, &next->nexthop);
}
}
/*---------------------------------------------------------------------------*/
void
data_packet_received(struct uc_conn *uc, rimeaddr_t *from)
{
struct mh_conn *c = (struct mh_conn *)uc;
struct data_hdr *msg = rimebuf_dataptr();
struct route_entry *rt;
int should_forward;
rimeaddr_t *nexthop;
PRINTF("data_packet_received from %d towards %d len %d\n", from->u16[0],
msg->dest.u16[0],
@ -96,24 +82,15 @@ data_packet_received(struct uc_conn *uc, rimeaddr_t *from)
c->cb->recv(c, &msg->originator);
}
} else {
if(c->cb->forwarding) {
should_forward = c->cb->forwarding(c);
} else {
should_forward = 1;
nexthop = NULL;
if(c->cb->forward) {
nexthop = c->cb->forward(c, &msg->originator,
&msg->dest, from, msg->hops);
}
if(should_forward) {
rt = route_lookup(&msg->dest);
if(rt != NULL) {
PRINTF("forwarding to %d\n", rt->nexthop.u16[0]);
/* msg->hops++;*/
uc_send(&c->c, &rt->nexthop);
} else {
PRINTF("%d.%d: no route to %d.%d\n",
rimeaddr_node_addr.u8[0],
rimeaddr_node_addr.u8[1],
msg->dest.u8[0],
msg->dest.u8[1]);
}
if(nexthop) {
PRINTF("forwarding to %d\n", rt->nexthop.u16[0]);
msg->hops++;
uc_send(&c->c, nexthop);
}
}
}
@ -137,15 +114,23 @@ mh_close(struct mh_conn *c)
int
mh_send(struct mh_conn *c, rimeaddr_t *to)
{
struct route_entry *rt;
rt = route_lookup(to);
if(rt == NULL) {
rimeaddr_t *nexthop;
struct data_hdr *hdr;
nexthop = c->cb->forward(c, &rimeaddr_node_addr, to, NULL, 0);
if(nexthop == NULL) {
PRINTF("mh_send: no route\n");
return 0;
} else {
PRINTF("mh_send: sending data\n");
send_data(c, to, rt);
if(rimebuf_hdralloc(sizeof(struct data_hdr))) {
hdr = rimebuf_hdrptr();
rimeaddr_copy(&hdr->dest, to);
rimeaddr_copy(&hdr->originator, &rimeaddr_node_addr);
hdr->hops = 0;
uc_send(&c->c, nexthop);
}
return 1;
}
}

10
core/net/rime/mh.h
View file

@ -48,7 +48,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: mh.h,v 1.2 2007/03/31 18:31:28 adamdunkels Exp $
* $Id: mh.h,v 1.3 2007/11/28 19:55:27 adamdunkels Exp $
*/
/**
@ -61,14 +61,18 @@
#ifndef __MH_H__
#define __MH_H__
#include "net/rime/abc.h"
#include "net/rime/uc.h"
#include "net/rime/rimeaddr.h"
struct mh_conn;
struct mh_callbacks {
void (* recv)(struct mh_conn *ptr, rimeaddr_t *sender);
int (* forwarding)(struct mh_conn *ptr);
rimeaddr_t *(* forward)(struct mh_conn *ptr,
rimeaddr_t *originator,
rimeaddr_t *dest,
rimeaddr_t *prevhop,
u8_t hops);
};
struct mh_conn {