From 4ea57586f53dad8e567d2072c5567b92e8902d8c Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Thu, 24 Apr 2014 22:19:50 +0200
Subject: Add a sequential number to identify peers

---
 src/fastd.h |  1 +
 src/peer.c  | 25 +++++++++++++++++++++++++
 src/peer.h  |  3 +++
 3 files changed, 29 insertions(+)

diff --git a/src/fastd.h b/src/fastd.h
index 4119a06..328666c 100644
--- a/src/fastd.h
+++ b/src/fastd.h
@@ -236,6 +236,7 @@ struct fastd_context {
 
 	fastd_peer_group_t *peer_group;
 
+	uint64_t next_peer_id;
 	VECTOR(fastd_peer_t*) peers;
 
 #ifdef USE_EPOLL
diff --git a/src/peer.c b/src/peer.c
index 80a91ab..22b25a0 100644
--- a/src/peer.c
+++ b/src/peer.c
@@ -137,6 +137,29 @@ void fastd_peer_schedule_handshake(fastd_peer_t *peer, int delay) {
 	fastd_dlist_insert(list, &peer->handshake_entry);
 }
 
+static int peer_id_cmp(fastd_peer_t *const *a, fastd_peer_t *const *b) {
+	if ((*a)->id == (*b)->id)
+		return 0;
+	else if ((*a)->id < (*b)->id)
+		return -1;
+	else
+		return 1;
+}
+
+fastd_peer_t* fastd_peer_find_by_id(uint64_t id) {
+	fastd_peer_t tmp = {.id = id};
+	const fastd_peer_t *tmpp = &tmp;
+
+	fastd_peer_t **ret = bsearch(&tmpp, VECTOR_DATA(ctx.peers), VECTOR_LEN(ctx.peers), sizeof(fastd_peer_t*),
+				    (int (*)(const void *, const void *))peer_id_cmp);
+
+	if (ret)
+		return *ret;
+	else
+		return NULL;
+
+}
+
 static inline fastd_peer_group_t* find_peer_group(fastd_peer_group_t *group, const fastd_peer_group_config_t *config) {
 	if (group->conf == config)
 		return group;
@@ -547,6 +570,8 @@ bool fastd_peer_may_connect(fastd_peer_t *peer) {
 fastd_peer_t* fastd_peer_add(fastd_peer_config_t *peer_conf) {
 	fastd_peer_t *peer = calloc(1, sizeof(fastd_peer_t));
 
+	peer->id = ctx.next_peer_id++;
+
 	if (peer_conf) {
 		peer->config = peer_conf;
 		peer->group = find_peer_group(ctx.peer_group, peer_conf->group);
diff --git a/src/peer.h b/src/peer.h
index 8d3bc6c..8496ee7 100644
--- a/src/peer.h
+++ b/src/peer.h
@@ -30,6 +30,8 @@
 
 
 struct fastd_peer {
+	uint64_t id;
+
 	const fastd_peer_config_t *config;
 	fastd_peer_group_t *group;
 
@@ -140,6 +142,7 @@ bool fastd_peer_matches_address(const fastd_peer_t *peer, const fastd_peer_addre
 bool fastd_peer_claim_address(fastd_peer_t *peer, fastd_socket_t *sock, const fastd_peer_address_t *local_addr, const fastd_peer_address_t *remote_addr);
 void fastd_peer_reset_socket(fastd_peer_t *peer);
 void fastd_peer_schedule_handshake(fastd_peer_t *peer, int delay);
+fastd_peer_t* fastd_peer_find_by_id(uint64_t id);
 
 static inline void fastd_peer_schedule_handshake_default(fastd_peer_t *peer) {
 	fastd_peer_schedule_handshake(peer, fastd_rand(17500, 22500));
-- 
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