Improved error message propagation due to new combined APIs

This amends 8892eb1934

src/common/common.c

@@ -479,13 +479,13 @@ int recv_msg_headers(int fd, uint8_t *cmd, unsigned timeout)
 		int e = errno;
 		syslog(LOG_ERR, "%s:%u: recvmsg: %s", __FILE__, __LINE__,
 		       strerror(e));
-		return -1;
+		return ERR_BAD_COMMAND;
 	}
 
 	if (ret == 0) {
 		syslog(LOG_ERR, "%s:%u: recvmsg returned zero", __FILE__,
 		       __LINE__);
-		return -1;
+		return ERR_PEER_TERMINATED;
 	}
 
 	*cmd = buffer[0];
@@ -525,13 +525,13 @@ int recv_msg_data(int fd, uint8_t *cmd, uint8_t *data, size_t data_size,
 		int e = errno;
 		syslog(LOG_ERR, "%s:%u: recvmsg: %s", __FILE__, __LINE__,
 		       strerror(e));
-		return -1;
+		return ERR_BAD_COMMAND;
 	}
 
 	if (ret == 0) {
 		syslog(LOG_ERR, "%s:%u: recvmsg returned zero", __FILE__,
 		       __LINE__);
-		return -1;
+		return ERR_PEER_TERMINATED;
 	}
 
 	/* try to receive socket (if any) */
@@ -556,7 +556,7 @@ int recv_msg_data(int fd, uint8_t *cmd, uint8_t *data, size_t data_size,
 	if (l32 > data_size) {
 		syslog(LOG_ERR, "%s:%u: recv_msg_data: received more data than expected", __FILE__,
 		       __LINE__);
-		ret = -1;
+		ret = ERR_BAD_COMMAND;
 		goto cleanup;
 	}
 
@@ -565,7 +565,7 @@ int recv_msg_data(int fd, uint8_t *cmd, uint8_t *data, size_t data_size,
 		int e = errno;
 		syslog(LOG_ERR, "%s:%u: recvmsg: %s", __FILE__,
 		       __LINE__, strerror(e));
-		ret = -1;
+		ret = ERR_BAD_COMMAND;
 		goto cleanup;
 	}
 
@@ -618,7 +618,7 @@ int recv_socket_msg(void *pool, int fd, uint8_t cmd,
 	}
 
 	if (ret == 0) {
-		syslog(LOG_ERR, "%s:%u: recvmsg returned zero", __FILE__,
+		syslog(LOG_DEBUG, "%s:%u: recvmsg returned zero", __FILE__,
 		       __LINE__);
 		return ERR_PEER_TERMINATED;
 	}

src/main-ctl-unix.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2014 Red Hat
+ * Copyright (C) 2014-2016 Red Hat
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -744,7 +744,7 @@ struct ctl_watcher_st {
 static void ctl_cmd_wacher_cb(EV_P_ ev_io *w, int revents)
 {
 	main_server_st *s = ev_userdata(loop);
-	int ret, e;
+	int ret;
 	size_t length;
 	uint8_t cmd;
 	uint8_t buffer[256];
@@ -760,10 +760,9 @@ static void ctl_cmd_wacher_cb(EV_P_ ev_io *w, int revents)
 
 	/* read request */
 	ret = recv_msg_data(wst->fd, &cmd, buffer, sizeof(buffer), NULL);
-	if (ret == -1) {
-		e = errno;
-		mslog(s, NULL, LOG_ERR, "error receiving ctl data: %s",
-		      strerror(e));
+	if (ret < 0) {
+		mslog(s, NULL, LOG_ERR, "error receiving ctl data");
+		goto fail;
 	}
 
 	length = ret;

src/main-worker-cmd.c

@@ -244,12 +244,10 @@ int handle_worker_commands(main_server_st * s, struct proc_st *proc)
 	PROTOBUF_ALLOCATOR(pa, proc);
 
 	ret = recv_msg_headers(proc->fd, &cmd, MAX_WAIT_SECS);
-	if (ret == -1) {
-		e = errno;
-		mslog(s, proc, LOG_ERR,
-		      "cannot obtain metadata from command socket: %s",
-		      strerror(e));
-		return ERR_BAD_COMMAND;
+	if (ret < 0) {
+		mslog(s, proc, LOG_INFO,
+		      "cannot obtain metadata from command socket");
+		return ret;
 	}
 
 	length = ret;

src/occtl/unix.c

@@ -110,7 +110,7 @@ int send_cmd(struct unix_ctx *ctx, unsigned cmd, const void *data,
 
 	if (rep != NULL) {
 		ret = recv_msg_headers(ctx->fd, &rcmd, DEFAULT_TIMEOUT);
-		if (ret == -1) {
+		if (ret < 0) {
 			/*e = errno;
 			fprintf(stderr, "read: %s\n", strerror(e));*/
 			ret = -1;

src/sec-mod.c

@@ -543,11 +543,8 @@ int serve_request_main(sec_mod_st *sec, int fd, uint8_t *buffer, unsigned buffer
 
 	/* read request */
 	ret = recv_msg_headers(fd, &cmd, MAIN_SEC_MOD_TIMEOUT);
-	if (ret == -1) {
-		e = errno;
-		seclog(sec, LOG_ERR, "error receiving msg head: %s",
-		       strerror(e));
-		ret = ERR_BAD_COMMAND;
+	if (ret < 0) {
+		seclog(sec, LOG_ERR, "error receiving msg head from main");
 		goto leave;
 	}
 
@@ -595,11 +592,8 @@ int serve_request_worker(sec_mod_st *sec, int cfd, pid_t pid, uint8_t *buffer, u
 
 	/* read request */
 	ret = recv_msg_headers(cfd, &cmd, MAX_WAIT_SECS);
-	if (ret == -1) {
-		e = errno;
-		seclog(sec, LOG_ERR, "error receiving msg head: %s",
-		       strerror(e));
-		ret = ERR_BAD_COMMAND;
+	if (ret < 0) {
+		seclog(sec, LOG_DEBUG, "error receiving msg head from worker");
 		goto leave;
 	}
 

src/worker-misc.c

@@ -1,5 +1,6 @@
 /*
- * Copyright (C) 2013, 2014 Nikos Mavrogiannopoulos
+ * Copyright (C) 2013-2016 Nikos Mavrogiannopoulos
+ * Copyright (C) 2015-2016 Red Hat, Inc.
  *
  * This file is part of ocserv.
  *
@@ -82,7 +83,6 @@ int handle_commands_from_main(struct worker_st *ws)
 	uint8_t cmd;
 	size_t length;
 	uint8_t cmd_data[1536];
-	int e;
 	UdpFdMsg *tmsg = NULL;
 	int ret;
 	int fd = -1;
@@ -91,9 +91,8 @@ int handle_commands_from_main(struct worker_st *ws)
 	memset(&cmd_data, 0, sizeof(cmd_data));
 
 	ret = recv_msg_data(ws->cmd_fd, &cmd, cmd_data, sizeof(cmd_data), &fd);
-	if (ret == -1) {
-		e = errno;
-		oclog(ws, LOG_ERR, "cannot obtain data from command socket: %s", strerror(e));
+	if (ret < 0) {
+		oclog(ws, LOG_DEBUG, "cannot obtain data from command socket");
 		exit_worker(ws);
 	}