114 lines
2.6 KiB
C
114 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Log to syslog.
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*
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* Copyright (c) 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
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*/
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#include <common.h>
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#include <log.h>
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#include <net.h>
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#include <asm/global_data.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define BUFFER_SIZE 480
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static void append(char **buf, char *buf_end, const char *fmt, ...)
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{
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va_list args;
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size_t size = buf_end - *buf;
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va_start(args, fmt);
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vsnprintf(*buf, size, fmt, args);
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va_end(args);
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*buf += strlen(*buf);
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}
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static int log_syslog_emit(struct log_device *ldev, struct log_rec *rec)
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{
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int ret;
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int fmt = gd->log_fmt;
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char msg[BUFFER_SIZE];
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char *msg_end = msg + BUFFER_SIZE;
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char *ptr = msg;
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char *iphdr;
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char *log_msg;
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int eth_hdr_size;
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struct in_addr bcast_ip;
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unsigned int log_level;
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char *log_hostname;
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/* Setup packet buffers */
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ret = net_init();
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if (ret)
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return ret;
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/* Disable hardware and put it into the reset state */
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eth_halt();
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/* Set current device according to environment variables */
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eth_set_current();
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/* Get hardware ready for send and receive operations */
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ret = eth_init();
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if (ret < 0) {
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eth_halt();
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goto out;
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}
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memset(msg, 0, BUFFER_SIZE);
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/* Set ethernet header */
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eth_hdr_size = net_set_ether((uchar *)ptr, net_bcast_ethaddr, PROT_IP);
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ptr += eth_hdr_size;
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iphdr = ptr;
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ptr += IP_UDP_HDR_SIZE;
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log_msg = ptr;
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/*
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* The syslog log levels defined in RFC 5424 match the U-Boot ones up to
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* level 7 (debug).
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*/
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log_level = rec->level;
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if (log_level > 7)
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log_level = 7;
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/* Leave high bits as 0 to write a 'kernel message' */
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/* Write log message to buffer */
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append(&ptr, msg_end, "<%u>", log_level);
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log_hostname = env_get("log_hostname");
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if (log_hostname)
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append(&ptr, msg_end, "%s ", log_hostname);
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append(&ptr, msg_end, "uboot: ");
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if (fmt & BIT(LOGF_LEVEL))
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append(&ptr, msg_end, "%s.",
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log_get_level_name(rec->level));
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if (fmt & BIT(LOGF_CAT))
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append(&ptr, msg_end, "%s,",
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log_get_cat_name(rec->cat));
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if (fmt & BIT(LOGF_FILE))
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append(&ptr, msg_end, "%s:", rec->file);
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if (fmt & BIT(LOGF_LINE))
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append(&ptr, msg_end, "%d-", rec->line);
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if (fmt & BIT(LOGF_FUNC))
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append(&ptr, msg_end, "%s()", rec->func);
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if (fmt & BIT(LOGF_MSG))
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append(&ptr, msg_end, "%s%s",
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fmt != BIT(LOGF_MSG) ? " " : "", rec->msg);
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/* Consider trailing 0x00 */
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ptr++;
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debug("log message: '%s'\n", log_msg);
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/* Broadcast message */
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bcast_ip.s_addr = 0xFFFFFFFFL;
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net_set_udp_header((uchar *)iphdr, bcast_ip, 514, 514, ptr - log_msg);
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net_send_packet((uchar *)msg, ptr - msg);
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out:
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return ret;
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}
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LOG_DRIVER(syslog) = {
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.name = "syslog",
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.emit = log_syslog_emit,
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};
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