diff --git a/adsbus/Makefile b/adsbus/Makefile
index 635b9ce..d6d1c7f 100644
--- a/adsbus/Makefile
+++ b/adsbus/Makefile
@@ -3,7 +3,7 @@ CFLAGS ?= -Wall -Werror -O4 -g --std=gnu11 --pedantic-errors -fPIE -pie -fstack-
 LDFLAGS ?= $(CFLAGS) -Wl,-z,relro -Wl,-z,now
 LIBS ?= -ljansson
 
-OBJ_NETWORK = incoming.o outgoing.o receive.o send.o
+OBJ_NETWORK = incoming.o outgoing.o receive.o send.o peer.o
 OBJ_PROTOCOL = airspy_adsb.o beast.o json.o raw.o stats.o
 OBJ_UTIL = buf.o hex.o opts.o rand.o uuid.o wakeup.o common.o
 
diff --git a/adsbus/adsbus.c b/adsbus/adsbus.c
index 6c0193b..209d769 100644
--- a/adsbus/adsbus.c
+++ b/adsbus/adsbus.c
@@ -1,24 +1,22 @@
-#include <stdlib.h>
-#include <stdio.h>
+#include <assert.h>
 #include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <assert.h>
-
-#include "incoming.h"
-#include "outgoing.h"
-
-#include "receive.h"
-#include "send.h"
 
 #include "beast.h"
-#include "json.h"
-#include "stats.h"
-
 #include "common.h"
 #include "hex.h"
+#include "incoming.h"
+#include "json.h"
 #include "opts.h"
+#include "outgoing.h"
+#include "peer.h"
 #include "rand.h"
+#include "receive.h"
+#include "send.h"
+#include "stats.h"
 #include "wakeup.h"
 
 static void print_usage(const char *name) {
diff --git a/adsbus/common.c b/adsbus/common.c
index 000ec21..c6809f6 100644
--- a/adsbus/common.c
+++ b/adsbus/common.c
@@ -14,76 +14,6 @@
 #include "uuid.h"
 #include "wakeup.h"
 
-static char server_id[UUID_LEN];
-static int peer_epoll_fd;
-static int peer_cancel_fd;
-static bool peer_canceled = false;
-
-static void peer_cancel(int signal) {
-	assert(!close(peer_cancel_fd));
-}
-
-static void peer_cancel_handler(struct peer *peer) {
-	fprintf(stderr, "X %s: Shutting down\n", server_id);
-	assert(!close(peer->fd));
-	free(peer);
-	peer_canceled = true;
-}
-
-void peer_init() {
-	uuid_gen(server_id);
-
-	peer_epoll_fd = epoll_create1(0);
-	assert(peer_epoll_fd >= 0);
-
-	int cancel_fds[2];
-	assert(!pipe2(cancel_fds, O_NONBLOCK));
-
-	struct peer *cancel_peer = malloc(sizeof(*cancel_peer));
-	assert(cancel_peer);
-	cancel_peer->fd = cancel_fds[0];
-	cancel_peer->event_handler = peer_cancel_handler;
-	peer_epoll_add(cancel_peer, EPOLLRDHUP);
-
-	peer_cancel_fd = cancel_fds[1];
-	signal(SIGINT, peer_cancel);
-}
-
-void peer_epoll_add(struct peer *peer, uint32_t events) {
-	struct epoll_event ev = {
-		.events = events,
-		.data = {
-			.ptr = peer,
-		},
-	};
-	assert(!epoll_ctl(peer_epoll_fd, EPOLL_CTL_ADD, peer->fd, &ev));
-}
-
-void peer_epoll_del(struct peer *peer) {
-	assert(!epoll_ctl(peer_epoll_fd, EPOLL_CTL_DEL, peer->fd, NULL));
-}
-
-void peer_loop() {
-	fprintf(stderr, "X %s: Starting event loop\n", server_id);
-	while (!peer_canceled) {
-#define MAX_EVENTS 10
-		struct epoll_event events[MAX_EVENTS];
-		int nfds = epoll_wait(peer_epoll_fd, events, MAX_EVENTS, wakeup_get_delay());
-		if (nfds == -1 && errno == EINTR) {
-			continue;
-		}
-		assert(nfds >= 0);
-
-    for (int n = 0; n < nfds; n++) {
-			struct peer *peer = events[n].data.ptr;
-			peer->event_handler(peer);
-		}
-
-		wakeup_dispatch();
-	}
-	assert(!close(peer_epoll_fd));
-}
-
 
 char *packet_type_names[] = {
 	"Mode-S short",
diff --git a/adsbus/common.h b/adsbus/common.h
index 3976bf2..d5c586a 100644
--- a/adsbus/common.h
+++ b/adsbus/common.h
@@ -1,22 +1,6 @@
 #pragma once
 
 #include <stdint.h>
-#include <sys/epoll.h>
-
-
-//////// peer
-
-// All specific peer structs must be castable to this.
-struct peer;
-typedef void (*peer_event_handler)(struct peer *);
-struct peer {
-	int fd;
-	peer_event_handler event_handler;
-};
-void peer_init();
-void peer_epoll_add(struct peer *, uint32_t);
-void peer_epoll_del(struct peer *);
-void peer_loop();
 
 
 //////// packet
diff --git a/adsbus/incoming.c b/adsbus/incoming.c
index 08ca3ca..a48ec80 100644
--- a/adsbus/incoming.c
+++ b/adsbus/incoming.c
@@ -11,6 +11,7 @@
 #include <unistd.h>
 
 #include "common.h"
+#include "peer.h"
 #include "wakeup.h"
 #include "uuid.h"
 
diff --git a/adsbus/outgoing.c b/adsbus/outgoing.c
index 1082026..056be89 100644
--- a/adsbus/outgoing.c
+++ b/adsbus/outgoing.c
@@ -9,6 +9,7 @@
 #include <unistd.h>
 
 #include "common.h"
+#include "peer.h"
 #include "wakeup.h"
 #include "uuid.h"
 
diff --git a/adsbus/peer.c b/adsbus/peer.c
new file mode 100644
index 0000000..47c193d
--- /dev/null
+++ b/adsbus/peer.c
@@ -0,0 +1,86 @@
+#define _GNU_SOURCE
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/epoll.h>
+#include <unistd.h>
+
+#include "uuid.h"
+#include "wakeup.h"
+
+#include "peer.h"
+
+static char server_id[UUID_LEN];
+static int peer_epoll_fd;
+static int peer_cancel_fd;
+static bool peer_canceled = false;
+
+static void peer_cancel(int signal) {
+	assert(!close(peer_cancel_fd));
+}
+
+static void peer_cancel_handler(struct peer *peer) {
+	fprintf(stderr, "X %s: Shutting down\n", server_id);
+	assert(!close(peer->fd));
+	free(peer);
+	peer_canceled = true;
+}
+
+void peer_init() {
+	uuid_gen(server_id);
+
+	peer_epoll_fd = epoll_create1(0);
+	assert(peer_epoll_fd >= 0);
+
+	int cancel_fds[2];
+	assert(!pipe2(cancel_fds, O_NONBLOCK));
+
+	struct peer *cancel_peer = malloc(sizeof(*cancel_peer));
+	assert(cancel_peer);
+	cancel_peer->fd = cancel_fds[0];
+	cancel_peer->event_handler = peer_cancel_handler;
+	peer_epoll_add(cancel_peer, EPOLLRDHUP);
+
+	peer_cancel_fd = cancel_fds[1];
+	signal(SIGINT, peer_cancel);
+}
+
+void peer_epoll_add(struct peer *peer, uint32_t events) {
+	struct epoll_event ev = {
+		.events = events,
+		.data = {
+			.ptr = peer,
+		},
+	};
+	assert(!epoll_ctl(peer_epoll_fd, EPOLL_CTL_ADD, peer->fd, &ev));
+}
+
+void peer_epoll_del(struct peer *peer) {
+	assert(!epoll_ctl(peer_epoll_fd, EPOLL_CTL_DEL, peer->fd, NULL));
+}
+
+void peer_loop() {
+	fprintf(stderr, "X %s: Starting event loop\n", server_id);
+	while (!peer_canceled) {
+#define MAX_EVENTS 10
+		struct epoll_event events[MAX_EVENTS];
+		int nfds = epoll_wait(peer_epoll_fd, events, MAX_EVENTS, wakeup_get_delay());
+		if (nfds == -1 && errno == EINTR) {
+			continue;
+		}
+		assert(nfds >= 0);
+
+    for (int n = 0; n < nfds; n++) {
+			struct peer *peer = events[n].data.ptr;
+			peer->event_handler(peer);
+		}
+
+		wakeup_dispatch();
+	}
+	assert(!close(peer_epoll_fd));
+}
diff --git a/adsbus/peer.h b/adsbus/peer.h
new file mode 100644
index 0000000..11025c5
--- /dev/null
+++ b/adsbus/peer.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <sys/epoll.h>
+
+// All specific peer structs must be castable to this.
+struct peer;
+typedef void (*peer_event_handler)(struct peer *);
+struct peer {
+	int fd;
+	peer_event_handler event_handler;
+};
+void peer_init();
+void peer_epoll_add(struct peer *, uint32_t);
+void peer_epoll_del(struct peer *);
+void peer_loop();
diff --git a/adsbus/receive.c b/adsbus/receive.c
index b361902..543a24c 100644
--- a/adsbus/receive.c
+++ b/adsbus/receive.c
@@ -7,6 +7,7 @@
 #include "airspy_adsb.h"
 #include "beast.h"
 #include "buf.h"
+#include "peer.h"
 #include "raw.h"
 #include "send.h"
 #include "uuid.h"
diff --git a/adsbus/send.c b/adsbus/send.c
index 41a6e70..4f5efac 100644
--- a/adsbus/send.c
+++ b/adsbus/send.c
@@ -12,6 +12,7 @@
 #include "beast.h"
 #include "buf.h"
 #include "json.h"
+#include "peer.h"
 #include "raw.h"
 #include "stats.h"
 #include "uuid.h"
diff --git a/adsbus/wakeup.c b/adsbus/wakeup.c
index d35f861..f3e5d60 100644
--- a/adsbus/wakeup.c
+++ b/adsbus/wakeup.c
@@ -11,6 +11,7 @@
 #include <sys/epoll.h>
 
 #include "common.h"
+#include "peer.h"
 #include "rand.h"
 
 #include "wakeup.h"
diff --git a/adsbus/wakeup.h b/adsbus/wakeup.h
index 66f4852..deed15e 100644
--- a/adsbus/wakeup.h
+++ b/adsbus/wakeup.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <stdint.h>
+
 struct peer;
 
 void wakeup_init();