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#include "lib/tunnel_encaps.h"
#include "filter/data.h"
static int
walk_tlvlist(const struct te_tlvlist *set, const struct te_visitor *visitor, void *opaque)
{
if (!set)
return 0;
struct te_tlv *t;
struct te_context ctx = { .opaque = opaque, };
WALK_LIST(t, set->tlv)
{
if (visitor->visit_tlv && visitor->visit_tlv(t->type, &ctx) < 0)
continue;
for (uint j=0; j < t->len; j++)
{
const struct te_subtlv *st = &t->st[j];
if (visitor->visit_subtlv && visitor->visit_subtlv(st->type, &ctx) < 0)
continue;
switch (st->type)
{
case TLV_ENCAPSULATION:
if (visitor->visit_encap && visitor->visit_encap(&st->u.tunnel_encap, &ctx) < 0)
return -1;
break;
case TLV_COLOR:
if (visitor->visit_color && visitor->visit_color(st->u.color, &ctx) < 0)
return -1;
break;
case TLV_TUNNEL_ENDPOINT:
if (visitor->visit_ep && visitor->visit_ep(&st->u.tunnel_endpoint, &ctx) < 0)
return -1;
break;
case TLV_UDP_DEST_PORT:
if (visitor->visit_udp_dest_port && visitor->visit_udp_dest_port(st->u.udp_dest_port, &ctx) < 0)
return -1;
break;
default:
if (visitor->visit_unknown && visitor->visit_unknown(st->type, &st->u.unknown, &ctx) < 0)
return -1;
break;
}
if (visitor->visit_subtlv_end)
visitor->visit_subtlv_end(st->type, &ctx); /* TODO use return value? */
}
if (visitor->visit_tlv_end)
visitor->visit_tlv_end(&ctx); /* TODO use return value? */
}
return 0;
}
static void calc_elems(const struct f_tree UNUSED *t, void *ptr)
{
uint *len = ptr;
(*len)++;
}
static void put_elems(const struct f_tree *t, void *ptr)
{
struct te_tlv *tlv = ptr;
const struct te_subtlv *st = &t->from.val.st;
tlv->len--;
tlv->st[tlv->len] = *st;
if (st->type == TLV_ENCAPSULATION)
tlv->type = st->u.tunnel_encap.type;
DBG("put_elems: type %d\n", st->type);
}
const struct te_tlv *tlv_alloc(struct linpool *pool, const struct f_tree *set)
{
uint len = 0;
tree_walk(set, calc_elems, &len);
if (!len)
return NULL;
struct te_tlv *res = lp_alloc(pool, sizeof(struct te_tlv) + len * sizeof(struct te_subtlv));
res->len = len;
tree_walk(set, put_elems, res);
res->len = len; /* Len was reset during tree_walk. */
for (uint i=0; i < len; i++)
{
DBG("tlv_alloc: type[%d]: %d\n", i, res->st[i].type);
}
return res;
}
int tlv_set_format(const struct te_tlvlist *set, int UNUSED from, byte *buf, uint size)
{
const struct te_visitor *visitor = te_get_format_visitor();
struct te_buffer buffer = {.pos=buf, .size=size, .tlv=0, .subtlv=0};
if (set)
walk_tlvlist(set, visitor, &buffer);
int l = bsnprintf(buffer.pos, buffer.size, "%s", buffer.tlv?"}":"<empty>");
if (l < 0)
return -1;
ADVANCE(buffer.pos, buffer.size, l);
return buffer.pos - buf;
}
int
tlv_set_contains(const struct te_tlvlist *list, const struct te_tlv UNUSED *val)
{
if (!list)
return 0;
/* FIXME */
return 0;
}
static void tlv_add_copy(struct linpool *pool, struct te_tlvlist *list, const struct te_tlv *t)
{
uint size = sizeof(struct te_tlv) + t->len * sizeof(struct te_subtlv);
struct te_tlv *tlv = lp_alloc(pool, size);
memcpy(tlv, t, size);
memset(&tlv->n, 0, sizeof(tlv->n));
add_tail(&list->tlv, &tlv->n);
DBG("tlv_add_copy: src type %d, dst type %d\n", t->st[0].type, tlv->st[0].type);
}
const struct te_tlvlist *
tlv_set_add(struct linpool *pool, const struct te_tlvlist *list, const struct te_tlv *val)
{
if (tlv_set_contains(list, val))
return list;
struct te_tlvlist *res = lp_alloc(pool, sizeof(struct te_tlvlist));
init_list(&res->tlv);
DBG("tlv_set_add: first type %d, second type %d\n", list?((const struct te_tlv *)HEAD(list->tlv))->st[0].type:-1, val->st[0].type);
if (list)
{
struct te_tlv *n;
WALK_LIST(n, list->tlv)
{
tlv_add_copy(pool, res, n);
}
}
tlv_add_copy(pool, res, val);
return res;
}
const struct te_tlvlist *
tlv_set_union(struct linpool UNUSED *pool, const struct te_tlvlist *l1, const struct te_tlvlist *l2)
{
if (!l1)
return l2;
if (!l2)
return l1;
/* FIXME */
void *res = NULL;
return res;
}
static int
subtlv_same(const struct te_subtlv *st1, const struct te_subtlv *st2)
{
if (st1 == NULL && st2 == NULL)
return 1;
if (st1 == NULL || st2 == NULL)
return 0;
if (st1->type != st2->type)
return 0;
switch(st1->type)
{
case TLV_ENCAPSULATION:
if (st1->u.tunnel_encap.type != st2->u.tunnel_encap.type ||
st1->u.tunnel_encap.length != st2->u.tunnel_encap.length ||
memcmp(st1->u.tunnel_encap.data, st2->u.tunnel_encap.data, st1->u.tunnel_encap.length))
return 0;
break;
case TLV_COLOR:
if (st1->u.color != st2->u.color)
return 0;
break;
case TLV_TUNNEL_ENDPOINT:
if (st1->u.tunnel_endpoint.reserved != st2->u.tunnel_endpoint.reserved ||
st1->u.tunnel_endpoint.af != st2->u.tunnel_endpoint.af ||
st1->u.tunnel_endpoint.af && ipa_compare(st1->u.tunnel_endpoint.ip, st2->u.tunnel_endpoint.ip))
return 0;
break;
case TLV_UDP_DEST_PORT:
if (st1->u.udp_dest_port != st2->u.udp_dest_port)
return 0;
break;
default:
if (st1->u.unknown.length != st2->u.unknown.length ||
memcmp(st1->u.unknown.data, st2->u.unknown.data, st1->u.unknown.length))
return 0;
break;
}
return 1;
}
static int
tlv_same(const struct te_tlv *t1, const struct te_tlv *t2)
{
if (t1 == NULL && t2 == NULL)
return 1;
if (t1 == NULL || t2 == NULL)
return 0;
if (t1->type != t2->type ||
t1->len != t2->len)
return 0;
for (uint i=0; i < t1->len; i++)
{
if (!subtlv_same(&t1->st[i], &t2->st[i]))
return 0;
}
return 1;
}
int
tlvlist_same(const struct te_tlvlist *tl1, const struct te_tlvlist *tl2)
{
if (tl1 == NULL && tl2 == NULL)
return 1;
if (tl1 == NULL || tl2 == NULL)
return 0;
const struct te_tlv *t1 = HEAD(tl1->tlv);
const struct te_tlv *t2 = HEAD(tl2->tlv);
while (NODE_VALID(t1) || NODE_VALID(t2))
{
if (!NODE_VALID(t1) || !NODE_VALID(t2))
return 0;
/* Both are valid. */
if (!tlv_same(t1, t2))
return 0;
}
return 1;
}
static int
tlvlist_calc_tunnel_encap_new(const struct te_tlvlist *t, struct adata *ad)
{
if (t == NULL)
return 0;
uint size = ad ? ad->length : 0;
byte *p = ad ? ad->data : NULL;
uint buf_size = te_init_encode_visitor(NULL, NULL, 0);
struct tlv_buffer *buf = alloca(buf_size);
if (te_init_encode_visitor(buf, p, size) < 0)
return -1;
if (walk_tlvlist(t, te_get_encode_visitor(), buf) < 0)
return -1;
return te_get_encode_length(buf);
}
struct adata *
tlvlist_encode_tunnel_encap(struct linpool *pool, const struct te_tlvlist *tl)
{
int len = tlvlist_calc_tunnel_encap_new(tl, NULL);
if (len < 0)
return NULL;
struct adata *ad = lp_alloc(pool, sizeof(struct adata) + len);
ad->length = len;
if (tlvlist_calc_tunnel_encap_new(tl, ad) < 0)
return NULL;
return ad;
}
struct decoder_buf
{
struct linpool *pool;
struct te_tlvlist *tl;
struct te_tlv *cur_tlv;
struct te_subtlv *cur_subtlv;
int cur_subtlv_index;
};
static int visitor_decode_tlv(int type, struct te_context *ctx)
{
struct decoder_buf *buf = ctx->opaque;
int count = te_count_subtlvs(ctx);
if (count < 0)
return -1;
buf->cur_tlv = lp_allocz(buf->pool, sizeof(struct te_tlv) + count * sizeof(struct te_subtlv));
buf->cur_tlv->type = type;
return 0;
}
static int visitor_decode_tlv_end(struct te_context *ctx)
{
struct decoder_buf *buf = ctx->opaque;
add_tail(&buf->tl->tlv, &buf->cur_tlv->n);
buf->cur_tlv->len = buf->cur_subtlv_index;
buf->cur_tlv = NULL;
return 0;
}
static int
visitor_decode_subtlv(int type, struct te_context *ctx){
struct decoder_buf *buf = ctx->opaque;
buf->cur_subtlv = &buf->cur_tlv->st[buf->cur_subtlv_index];
buf->cur_subtlv->type = type;
return 0;
}
static int
visitor_decode_subtlv_end(int UNUSED type, struct te_context *ctx){
struct decoder_buf *buf = ctx->opaque;
buf->cur_subtlv_index++;
return 0;
}
static int
visitor_decode_encap(const struct te_encap *encap, struct te_context *ctx)
{
struct decoder_buf *buf = ctx->opaque;
buf->cur_subtlv->u.tunnel_encap = *encap;
return 0;
}
static int
visitor_decode_ep(const struct te_endpoint *ep, struct te_context *ctx)
{
struct decoder_buf *buf = ctx->opaque;
buf->cur_subtlv->u.tunnel_endpoint = *ep;
return 0;
}
static int
visitor_decode_color(u32 color, struct te_context *ctx)
{
struct decoder_buf *buf = ctx->opaque;
buf->cur_subtlv->u.color = color;
return 0;
}
static int
visitor_decode_udp_dest_port(u16 port, struct te_context *ctx)
{
struct decoder_buf *buf = ctx->opaque;
buf->cur_subtlv->u.udp_dest_port = port;
return 0;
}
static int
visitor_decode_unknown(int UNUSED type, const struct te_unknown *unknown, struct te_context *ctx)
{
struct decoder_buf *buf = ctx->opaque;
buf->cur_subtlv->u.unknown = *unknown;
return 0;
}
struct te_tlvlist *tlvlist_decode_tunnel_encap(struct linpool *pool,
const struct adata *ad)
{
struct te_tlvlist *tl = lp_alloc(pool, sizeof(struct te_tlvlist));
struct decoder_buf buf = { .pool = pool, .tl = tl, };
struct te_visitor visitor = {
.visit_tlv = visitor_decode_tlv,
.visit_tlv_end = visitor_decode_tlv_end,
.visit_subtlv = visitor_decode_subtlv,
.visit_subtlv_end = visitor_decode_subtlv_end,
.visit_encap = visitor_decode_encap,
.visit_ep = visitor_decode_ep,
.visit_color = visitor_decode_color,
.visit_udp_dest_port = visitor_decode_udp_dest_port,
.visit_unknown = visitor_decode_unknown,
};
init_list(&tl->tlv);
int res = walk_tunnel_encap(ad, &visitor, &buf);
if (res < 0)
return NULL;
return tl;
}
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