subdirmk: Change stub force target to `run-main.mk'

[secnet.git] / site.c

diff --git a/site.c b/site.c
index 5f415dec7a55093e7aa00dfd34ad1e7400ef3f86..37968896ccb50f1d07370a7ff582d1697a158327 100644 (file)
--- a/site.c
+++ b/site.c
@@ -396,15 +396,23 @@ static uint32_t event_log_priority(struct site *st, uint32_t event)
     }
 }
 
+static uint32_t slog_start(struct site *st, uint32_t event)
+{
+    uint32_t class=event_log_priority(st, event);
+    if (class) {
+       slilog_part(st->log,class,"%s: ",st->tunname);
+    }
+    return class;
+}
+
 static void vslog(struct site *st, uint32_t event, cstring_t msg, va_list ap)
 FORMAT(printf,3,0);
 static void vslog(struct site *st, uint32_t event, cstring_t msg, va_list ap)
 {
     uint32_t class;
 
-    class=event_log_priority(st, event);
+    class=slog_start(st,event);
     if (class) {
-       slilog_part(st->log,class,"%s: ",st->tunname);
        vslilog_part(st->log,class,msg,ap);
        slilog_part(st->log,class,"\n");
     }
@@ -798,10 +806,16 @@ static bool_t check_msg(struct site *st, uint32_t type, struct msg *m,
     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,
@@ -821,8 +835,8 @@ 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,
@@ -1585,12 +1599,14 @@ static bool_t enter_new_state(struct site *st, uint32_t next,
     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:
@@ -1805,15 +1821,31 @@ static void site_outgoing(void *sst, struct buffer_if *buf)
 }
 
 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) {
@@ -1834,7 +1866,7 @@ static bool_t setup_late_msg_ok(struct site *st,
      * 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) ||
@@ -1851,7 +1883,8 @@ static bool_t setup_late_msg_ok(struct site *st,
    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;
 
@@ -1863,7 +1896,7 @@ static bool_t site_incoming(void *sst, struct buffer_if *buf,
       /* 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);
@@ -1927,7 +1960,7 @@ static bool_t site_incoming(void *sst, struct buffer_if *buf,
        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) {
@@ -2056,6 +2089,8 @@ static bool_t site_incoming(void *sst, struct buffer_if *buf,
        return True;
     }
 
+    priomsg_update_fixed(whynot, comm_notify_whynot_general,
+                        "not MSG1 or PROD; unknown dest index");
     return False;
 }