mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 21:24:29 +00:00
befadde0a2
Provide a log driver that broadcasts RFC 3164 messages to syslog servers. rsyslog is one implementation of such a server. The messages are sent to the local broadcast address 255.255.255.255 on port 514. The environment variable log_hostname can be used to provide the HOSTNAME field for the messages. The optional TIMESTAMP field of RFC 3164 is not provided. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Log to syslog.
|
|
*
|
|
* Copyright (c) 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <log.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#define BUFFER_SIZE 480
|
|
|
|
static void append(char **buf, char *buf_end, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
size_t size = buf_end - *buf;
|
|
|
|
va_start(args, fmt);
|
|
vsnprintf(*buf, size, fmt, args);
|
|
va_end(args);
|
|
*buf += strlen(*buf);
|
|
}
|
|
|
|
static int log_syslog_emit(struct log_device *ldev, struct log_rec *rec)
|
|
{
|
|
int ret;
|
|
int fmt = gd->log_fmt;
|
|
char msg[BUFFER_SIZE];
|
|
char *msg_end = msg + BUFFER_SIZE;
|
|
char *ptr = msg;
|
|
char *iphdr;
|
|
char *log_msg;
|
|
int eth_hdr_size;
|
|
struct in_addr bcast_ip;
|
|
static int processing_msg;
|
|
unsigned int log_level;
|
|
char *log_hostname;
|
|
|
|
/* Fend off messages from the network stack while writing a message */
|
|
if (processing_msg)
|
|
return 0;
|
|
|
|
processing_msg = 1;
|
|
|
|
/* Setup packet buffers */
|
|
net_init();
|
|
/* Disable hardware and put it into the reset state */
|
|
eth_halt();
|
|
/* Set current device according to environment variables */
|
|
eth_set_current();
|
|
/* Get hardware ready for send and receive operations */
|
|
ret = eth_init();
|
|
if (ret < 0) {
|
|
eth_halt();
|
|
goto out;
|
|
}
|
|
|
|
memset(msg, 0, BUFFER_SIZE);
|
|
|
|
/* Set ethernet header */
|
|
eth_hdr_size = net_set_ether((uchar *)ptr, net_bcast_ethaddr, PROT_IP);
|
|
ptr += eth_hdr_size;
|
|
iphdr = ptr;
|
|
ptr += IP_UDP_HDR_SIZE;
|
|
log_msg = ptr;
|
|
|
|
/*
|
|
* The syslog log levels defined in RFC 5424 match the U-Boot ones up to
|
|
* level 7 (debug).
|
|
*/
|
|
log_level = rec->level;
|
|
if (log_level > 7)
|
|
log_level = 7;
|
|
/* Leave high bits as 0 to write a 'kernel message' */
|
|
|
|
/* Write log message to buffer */
|
|
append(&ptr, msg_end, "<%u>", log_level);
|
|
log_hostname = env_get("log_hostname");
|
|
if (log_hostname)
|
|
append(&ptr, msg_end, "%s ", log_hostname);
|
|
append(&ptr, msg_end, "uboot: ");
|
|
if (fmt & (1 << LOGF_LEVEL))
|
|
append(&ptr, msg_end, "%s.",
|
|
log_get_level_name(rec->level));
|
|
if (fmt & (1 << LOGF_CAT))
|
|
append(&ptr, msg_end, "%s,",
|
|
log_get_cat_name(rec->cat));
|
|
if (fmt & (1 << LOGF_FILE))
|
|
append(&ptr, msg_end, "%s:", rec->file);
|
|
if (fmt & (1 << LOGF_LINE))
|
|
append(&ptr, msg_end, "%d-", rec->line);
|
|
if (fmt & (1 << LOGF_FUNC))
|
|
append(&ptr, msg_end, "%s()", rec->func);
|
|
if (fmt & (1 << LOGF_MSG))
|
|
append(&ptr, msg_end, "%s%s",
|
|
fmt != (1 << LOGF_MSG) ? " " : "", rec->msg);
|
|
/* Consider trailing 0x00 */
|
|
ptr++;
|
|
|
|
debug("log message: '%s'\n", log_msg);
|
|
|
|
/* Broadcast message */
|
|
bcast_ip.s_addr = 0xFFFFFFFFL;
|
|
net_set_udp_header((uchar *)iphdr, bcast_ip, 514, 514, ptr - log_msg);
|
|
net_send_packet((uchar *)msg, ptr - msg);
|
|
|
|
out:
|
|
processing_msg = 0;
|
|
return ret;
|
|
}
|
|
|
|
LOG_DRIVER(syslog) = {
|
|
.name = "syslog",
|
|
.emit = log_syslog_emit,
|
|
};
|