ecfxp: refresh session key periodically

1 files changed, 8 insertions, 0 deletions

diff --git a/src/fastd.h b/src/fastd.h
index dc425ba..e9d30a0 100644
--- a/src/fastd.h
+++ b/src/fastd.h
@@ -93,6 +93,7 @@ struct _fastd_config {
 	fastd_protocol *protocol;
 	char *secret;
 	unsigned key_valid;
+	unsigned key_refresh;
 
 	fastd_peer_config *peers;
 
@@ -123,6 +124,8 @@ struct _fastd_context {
 	size_t eth_addr_size;
 	size_t n_eth_addr;
 	fastd_peer_eth_addr *eth_addr;
+
+	unsigned int randseed;
 };
 
 void fastd_printf(const fastd_context *ctx, const char *format, ...);
@@ -133,6 +136,11 @@ void fastd_configure(fastd_context *ctx, fastd_config *conf, int argc, char *con
 
 void fastd_random_bytes(fastd_context *ctx, void *buffer, size_t len, bool secure);
 
+static inline int fastd_rand(fastd_context *ctx, int min, int max) {
+	unsigned int r = (unsigned int)rand_r(&ctx->randseed);
+	return (r%(max-min) + min);
+}
+
 #define pr_log(ctx, level, prefix, args...) do { \
 		if ((ctx)->conf == NULL || (level) <= (ctx)->conf->loglevel) { \
 			fputs(prefix, stderr); fastd_printf(ctx, args); fputs("\n", stderr); \