Clear connection options and status fields in free_connection_partially().

Most fields should be zero when reusing a connection. In particular, when an
outgoing connection to a node which is reachable on more than one address is
made, the second connection to that node will have status.encryptout set but
outctx will be NULL, causing a NULL pointer dereference when
EVP_EncryptUpdate() is called in send_meta() when it shouldn't.

diff --git a/src/connection.c b/src/connection.c
index 9b752fa..fd7ae84 100644 (file)
--- a/src/connection.c
+++ b/src/connection.c
@@ -73,6 +73,15 @@ void free_connection_partially(connection_t *c) {
        c->hischallenge = NULL;
        c->outbuf = NULL;
 
+       c->status.pinged = false;
+       c->status.active = false;
+       c->status.connecting = false;
+       c->status.timeout = false;
+       c->status.encryptout = false;
+       c->status.decryptin = false;
+       c->status.mst = false;
+
+       c->options = 0;
        c->buflen = 0;
        c->reqlen = 0;
        c->tcplen = 0;
@@ -80,6 +89,8 @@ void free_connection_partially(connection_t *c) {
        c->outbuflen = 0;
        c->outbufsize = 0;
        c->outbufstart = 0;
+       c->last_ping_time = 0;
+       c->last_flushed_time = 0;
 
        if(c->inctx) {
                EVP_CIPHER_CTX_cleanup(c->inctx);

diff --git a/src/connection.h b/src/connection.h
index fbe4e02..877601f 100644 (file)
--- a/src/connection.h
+++ b/src/connection.h
@@ -35,7 +35,7 @@ typedef struct connection_status_t {
        unsigned int pinged:1;                          /* sent ping */
        unsigned int active:1;                          /* 1 if active.. */
        unsigned int connecting:1;                      /* 1 if we are waiting for a non-blocking connect() to finish */
-       unsigned int termreq:1;                         /* the termination of this connection was requested */
+       unsigned int unused_termreq:1;                  /* the termination of this connection was requested */
        unsigned int remove:1;                          /* Set to 1 if you want this connection removed */
        unsigned int timeout:1;                         /* 1 if gotten timeout */
        unsigned int encryptout:1;                      /* 1 if we can encrypt outgoing traffic */