Stop relying on struct ordering and packing for peer.

adsbus/exec.c

@@ -68,7 +68,7 @@ static void exec_del(struct exec *exec) {
 }
 
 static void exec_close_handler(struct peer *peer) {
-	struct exec *exec = (struct exec *) peer;
+	struct exec *exec = container_of(peer, struct exec, peer);
 	exec_harvest(exec);
 	uint32_t delay = wakeup_get_retry_delay_ms(1);
 	LOG(exec->id, "Will retry in %ds", delay / 1000);
@@ -159,7 +159,7 @@ static void exec_spawn(struct exec *exec) {
 }
 
 static void exec_spawn_wrapper(struct peer *peer) {
-	struct exec *exec = (struct exec *) peer;
+	struct exec *exec = container_of(peer, struct exec, peer);
 	exec_spawn(exec);
 }
 

adsbus/file.c

@@ -76,7 +76,7 @@ static void file_retry(struct file *file) {
 }
 
 static void file_handle_close(struct peer *peer) {
-	struct file *file = (struct file *) peer;
+	struct file *file = container_of(peer, struct file, peer);
 	LOG(file->id, "File closed: %s", file->path);
 
 	if (file->retry) {
@@ -106,7 +106,7 @@ static void file_open(struct file *file) {
 }
 
 static void file_open_wrapper(struct peer *peer) {
-	struct file *file = (struct file *) peer;
+	struct file *file = container_of(peer, struct file, peer);
 	file_open(file);
 }
 

adsbus/incoming.c

@@ -48,7 +48,7 @@ static void incoming_retry(struct incoming *incoming) {
 }
 
 static void incoming_handler(struct peer *peer) {
-	struct incoming *incoming = (struct incoming *) peer;
+	struct incoming *incoming = container_of(peer, struct incoming, peer);
 
 	struct sockaddr peer_addr, local_addr;
 	socklen_t peer_addrlen = sizeof(peer_addr), local_addrlen = sizeof(local_addr);
@@ -87,7 +87,7 @@ static void incoming_del(struct incoming *incoming) {
 }
 
 static void incoming_listen(struct peer *peer) {
-	struct incoming *incoming = (struct incoming *) peer;
+	struct incoming *incoming = container_of(peer, struct incoming, peer);
 
 	struct addrinfo *addrs;
 	int err = resolve_result(peer, &addrs);
@@ -142,7 +142,7 @@ static void incoming_resolve(struct incoming *incoming) {
 }
 
 static void incoming_resolve_wrapper(struct peer *peer) {
-	incoming_resolve((struct incoming *) peer);
+	incoming_resolve(container_of(peer, struct incoming, peer));
 }
 
 static bool incoming_add(const char *host_port, struct flow *flow, void *passthrough) {

adsbus/outgoing.c

@@ -6,7 +6,6 @@
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <unistd.h>
 
 #include "buf.h"
 #include "flow.h"
@@ -73,7 +72,7 @@ static void outgoing_connect_next(struct outgoing *outgoing) {
 }
 
 static void outgoing_connect_handler(struct peer *peer) {
-	struct outgoing *outgoing = (struct outgoing *) peer;
+	struct outgoing *outgoing = container_of(peer, struct outgoing, peer);
 
 	peer_epoll_del(&outgoing->peer);
 
@@ -84,7 +83,7 @@ static void outgoing_connect_handler(struct peer *peer) {
 }
 
 static void outgoing_disconnect_handler(struct peer *peer) {
-	struct outgoing *outgoing = (struct outgoing *) peer;
+	struct outgoing *outgoing = container_of(peer, struct outgoing, peer);
 	LOG(outgoing->id, "Peer disconnected; reconnecting...");
 	outgoing_retry(outgoing);
 }
@@ -121,7 +120,7 @@ static void outgoing_connect_result(struct outgoing *outgoing, int result) {
 }
 
 static void outgoing_resolve_handler(struct peer *peer) {
-	struct outgoing *outgoing = (struct outgoing *) peer;
+	struct outgoing *outgoing = container_of(peer, struct outgoing, peer);
 	int err = resolve_result(peer, &outgoing->addrs);
 	if (err) {
 		LOG(outgoing->id, "Failed to resolve %s/%s: %s", outgoing->node, outgoing->service, gai_strerror(err));
@@ -139,7 +138,7 @@ static void outgoing_resolve(struct outgoing *outgoing) {
 }
 
 static void outgoing_resolve_wrapper(struct peer *peer) {
-	outgoing_resolve((struct outgoing *) peer);
+	outgoing_resolve(container_of(peer, struct outgoing, peer));
 }
 
 static void outgoing_del(struct outgoing *outgoing) {

adsbus/receive.c

@@ -4,7 +4,6 @@
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <unistd.h>
 
 #include "airspy_adsb.h"
 #include "beast.h"
@@ -115,7 +114,7 @@ static void receive_del(struct receive *receive) {
 }
 
 static void receive_read(struct peer *peer) {
-	struct receive *receive = (struct receive *) peer;
+	struct receive *receive = container_of(peer, struct receive, peer);
 
 	if (buf_fill(&receive->buf, receive->peer.fd) <= 0) {
 		receive_del(receive);

adsbus/send.c

@@ -99,7 +99,7 @@ static void send_del(struct send *send) {
 }
 
 static void send_del_wrapper(struct peer *peer) {
-	send_del((struct send *) peer);
+	send_del(container_of(peer, struct send, peer));
 }
 
 static void send_new(int fd, void *passthrough, struct peer *on_close) {

adsbus/send_receive.c

@@ -35,7 +35,7 @@ static void send_receive_del(struct send_receive *send_receive) {
 }
 
 static void send_receive_on_close(struct peer *peer) {
-	struct send_receive *send_receive = (struct send_receive *) peer;
+	struct send_receive *send_receive = container_of(peer, struct send_receive, peer);
 
 	if (!--(send_receive->ref_count)) {
 		send_receive_del(send_receive);