return False;
}
-static bool_t generate_msg1(struct site *st, const struct msg *prompt_maybe_0)
+static bool_t kex_init(struct site *st)
{
st->random->generate(st->random->st,NONCELEN,st->localN);
- return generate_msg(st,LABEL_MSG1,"site:MSG1",prompt_maybe_0);
+ return True;
+}
+
+static bool_t generate_msg1(struct site *st, const struct msg *prompt_maybe_0)
+{
+ return
+ generate_msg(st,LABEL_MSG1,"site:MSG1",prompt_maybe_0);
}
static bool_t process_msg1(struct site *st, struct buffer_if *msg1,
static bool_t generate_msg2(struct site *st,
const struct msg *prompt_may_be_null)
{
- st->random->generate(st->random->st,NONCELEN,st->localN);
- return generate_msg(st,LABEL_MSG2,"site:MSG2",prompt_may_be_null);
+ return
+ generate_msg(st,LABEL_MSG2,"site:MSG2",prompt_may_be_null);
}
static bool_t process_msg2(struct site *st, struct buffer_if *msg2,
switch(next) {
case SITE_SENTMSG1:
state_assert(st,st->state==SITE_RUN || st->state==SITE_RESOLVE);
+ if (!kex_init(st)) return False;
gen=generate_msg1;
st->msg1_crossed_logged = False;
break;
case SITE_SENTMSG2:
state_assert(st,st->state==SITE_RUN || st->state==SITE_RESOLVE ||
st->state==SITE_SENTMSG1 || st->state==SITE_WAIT);
+ if (!kex_init(st)) return False;
gen=generate_msg2;
break;
case SITE_SENTMSG3:
}
static bool_t named_for_us(struct site *st, const struct buffer_if *buf_in,
- uint32_t type, struct msg *m)
+ uint32_t type, struct msg *m,
+ struct priomsg *whynot)
/* For packets which are identified by the local and remote names.
* If it has our name and our peer's name in it it's for us. */
{
struct buffer_if buf[1];
buffer_readonly_clone(buf,buf_in);
- return unpick_msg(st,type,buf,m)
- && name_matches(&m->remote,st->remotename)
- && name_matches(&m->local,st->localname);
+
+ if (!unpick_msg(st,type,buf,m)) {
+ priomsg_update_fixed(whynot, comm_notify_whynot_unpick, "malformed");
+ return False;
+ }
+#define NAME_MATCHES(lr) \
+ if (!name_matches(&m->lr, st->lr##name)) { \
+ if (priomsg_update_fixed(whynot, comm_notify_whynot_name_##lr, \
+ "unknown " #lr " name: ")) { \
+ truncmsg_add_packet_string(&whynot->m, m->lr.len, m->lr.name); \
+ } \
+ return False; \
+ }
+ NAME_MATCHES(remote);
+ NAME_MATCHES(local );
+#undef NAME_MATCHES
+
+ return True;
}
static bool_t we_have_priority(struct site *st, const struct msg *m) {
* late. Maybe they came via a different path. All we do is make
* a note of the sending address, iff they look like they are part
* of the current key setup attempt. */
- if (!named_for_us(st,buf_in,msgtype,m))
+ if (!named_for_us(st,buf_in,msgtype,m,0))
/* named_for_us calls unpick_msg which gets the nonces */
return False;
if (!consttime_memeq(m->nR,st->remoteN,NONCELEN) ||
this current site instance (and should therefore not be processed
by other sites), even if the packet was otherwise ignored. */
static bool_t site_incoming(void *sst, struct buffer_if *buf,
- const struct comm_addr *source)
+ const struct comm_addr *source,
+ struct priomsg *whynot)
{
struct site *st=sst;
/* initialised by named_for_us, or process_msgN for N!=1 */
if (msgtype==LABEL_MSG1) {
- if (!named_for_us(st,buf,msgtype,&msg))
+ if (!named_for_us(st,buf,msgtype,&msg,whynot))
return False;
/* It's a MSG1 addressed to us. Decide what to do about it. */
dump_packet(st,buf,source,True,True);
return True;
}
if (msgtype==LABEL_PROD) {
- if (!named_for_us(st,buf,msgtype,&msg))
+ if (!named_for_us(st,buf,msgtype,&msg,whynot))
return False;
dump_packet(st,buf,source,True,True);
if (st->state!=SITE_RUN) {
return True;
}
+ priomsg_update_fixed(whynot, comm_notify_whynot_general,
+ "not MSG1 or PROD; unknown dest index");
return False;
}