having supernode running again (unencryptedly)

header_encryption.c

@@ -75,6 +75,7 @@ int8_t packet_header_decrypt_if_required (uint8_t packet[], uint16_t packet_len,
 				return (-2);
 		// set 'no encryption'  in case it is not set yet
 		c->header_encryption = HEADER_ENCRYPTION_NONE;
+		c->header_encryption_ctx = NULL;
 		return (HEADER_ENCRYPTION_NONE);
 	} else {
 
@@ -125,5 +126,6 @@ void packet_header_setup_key (char * community_name, he_context_t * ctx) {
 	uint8_t key[16];
 	pearson_hash_128 (key, (uint8_t*)community_name, N2N_COMMUNITY_SIZE);
 
+        ctx = calloc(1, sizeof(speck_context_t));
 	speck_expand_key_he (key, (speck_context_t*)ctx);
 }

header_encryption.h

@@ -1,14 +1,13 @@
-
-
-#ifndef _HEADER_ENCRYPTION_H_
-#define _HEADER_ENCRYPTION_H_
+//#ifndef _HEADER_ENCRYPTION_H_
+//#define _HEADER_ENCRYPTION_H_
 
 
 #include <stdint.h>
-#include "speck.h"
 
 
 #include "n2n.h"
+#include "speck.h"
+
 //define he_context_t	speck_context_t
 typedef struct speck_context_t he_context_t;
 
@@ -30,4 +29,7 @@ int8_t packet_header_decrypt_if_required (uint8_t packet[], uint16_t packet_len,
 int32_t packet_header_encrypt (uint8_t packet[], uint8_t header_len, he_context_t * ctx);
 
 
-#endif
+void packet_header_setup_key (char * community_name, he_context_t * ctx);
+
+
+// #endif

sn.c

@@ -81,6 +81,8 @@ static void deinit_sn(n2n_sn_t * sss)
 
   HASH_ITER(hh, sss->communities, community, tmp) {
     clear_peer_list(&community->edges);
+    if (NULL != community->header_encryption_ctx)
+      free (community->header_encryption_ctx);
     HASH_DEL(sss->communities, community);
     free(community);
   }
@@ -390,6 +392,8 @@ static int load_allowed_sn_community(n2n_sn_t *sss, char *path) {
 
   HASH_ITER(hh, sss->communities, s, tmp) {
     HASH_DEL(sss->communities, s);
+    if (NULL != s->header_encryption_ctx)
+      free (s->header_encryption_ctx);
     free(s);
   }
 
@@ -413,7 +417,12 @@ static int load_allowed_sn_community(n2n_sn_t *sss, char *path) {
     if(s != NULL) {
       strncpy((char*)s->community, line, N2N_COMMUNITY_SIZE-1);
       s->community[N2N_COMMUNITY_SIZE-1] = '\0';
+      /* we do not know if header encryption is used in this community,
+       * first packet will show. just in case, setup the key.           */
+      s->header_encryption = HEADER_ENCRYPTION_UNKNOWN;
+      packet_header_setup_key (s->community, s->header_encryption_ctx);
       HASH_ADD_STR(sss->communities, community, s);
+
       num_communities++;
       traceEvent(TRACE_INFO, "Added allowed community '%s' [total: %u]",
 		 (char*)s->community, num_communities);
@@ -630,6 +639,7 @@ static int process_udp(n2n_sn_t * sss,
 	comm->community[N2N_COMMUNITY_SIZE-1] = '\0';
         /* new communities introduced by REGISTERs could not have had encrypted header */
         comm->header_encryption = HEADER_ENCRYPTION_NONE;
+	comm->header_encryption_ctx = NULL;
 
 	HASH_ADD_STR(sss->communities, community, comm);
 
@@ -1122,6 +1132,9 @@ static int run_loop(n2n_sn_t * sss) {
 
       if((comm->edges == NULL) && (!sss->lock_communities)) {
 	traceEvent(TRACE_INFO, "Purging idle community %s", comm->community);
+	if (NULL != comm->header_encryption_ctx)
+          /* this should not happen as no 'locked' and thus only communities w/o encrypted header here */
+	  free (comm->header_encryption_ctx);
 	HASH_DEL(sss->communities, comm);
 	free(comm);
       }

sn_utils.c

@@ -226,6 +226,8 @@ void sn_term(n2n_sn_t *sss)
     HASH_ITER(hh, sss->communities, community, tmp)
     {
         clear_peer_list(&community->edges);
+        if (NULL != community->header_encryption_ctx)
+          free (community->header_encryption_ctx);
         HASH_DEL(sss->communities, community);
         free(community);
     }
@@ -579,6 +581,7 @@ static int process_udp(n2n_sn_t *sss,
                 comm->community[N2N_COMMUNITY_SIZE - 1] = '\0';
 		/* new communities introduced by REGISTERs could not have had encrypted header */
 		comm->header_encryption = HEADER_ENCRYPTION_NONE;
+		comm->header_encryption_ctx = NULL;
 
                 HASH_ADD_STR(sss->communities, community, comm);
 
@@ -780,6 +783,9 @@ int run_sn_loop(n2n_sn_t *sss, int *keep_running)
             if ((comm->edges == NULL) && (!sss->lock_communities))
             {
                 traceEvent(TRACE_INFO, "Purging idle community %s", comm->community);
+                if (NULL != comm->header_encryption_ctx)
+		    /* this should not happen as no 'locked' and thus only communities w/o encrypted header here */
+                    free (comm->header_encryption_ctx);
 		HASH_DEL(sss->communities, comm);
                 free(comm);
             }