blob: 53c4def5d1c0f140780061d4f386342801602f16 [file] [log] [blame]
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +01001// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Log to syslog.
4 *
5 * Copyright (c) 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
6 */
7
8#include <common.h>
9#include <log.h>
Simon Glass90526e92020-05-10 11:39:56 -060010#include <net.h>
Simon Glass401d1c42020-10-30 21:38:53 -060011#include <asm/global_data.h>
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +010012
13DECLARE_GLOBAL_DATA_PTR;
14
15#define BUFFER_SIZE 480
16
17static void append(char **buf, char *buf_end, const char *fmt, ...)
18{
19 va_list args;
20 size_t size = buf_end - *buf;
21
22 va_start(args, fmt);
23 vsnprintf(*buf, size, fmt, args);
24 va_end(args);
25 *buf += strlen(*buf);
26}
27
28static int log_syslog_emit(struct log_device *ldev, struct log_rec *rec)
29{
30 int ret;
31 int fmt = gd->log_fmt;
32 char msg[BUFFER_SIZE];
33 char *msg_end = msg + BUFFER_SIZE;
34 char *ptr = msg;
35 char *iphdr;
36 char *log_msg;
37 int eth_hdr_size;
38 struct in_addr bcast_ip;
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +010039 unsigned int log_level;
40 char *log_hostname;
41
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +010042 /* Setup packet buffers */
Sean Andersona4326612020-09-12 17:45:44 -040043 ret = net_init();
44 if (ret)
45 return ret;
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +010046 /* Disable hardware and put it into the reset state */
47 eth_halt();
48 /* Set current device according to environment variables */
49 eth_set_current();
50 /* Get hardware ready for send and receive operations */
51 ret = eth_init();
52 if (ret < 0) {
53 eth_halt();
54 goto out;
55 }
56
57 memset(msg, 0, BUFFER_SIZE);
58
59 /* Set ethernet header */
60 eth_hdr_size = net_set_ether((uchar *)ptr, net_bcast_ethaddr, PROT_IP);
61 ptr += eth_hdr_size;
62 iphdr = ptr;
63 ptr += IP_UDP_HDR_SIZE;
64 log_msg = ptr;
65
66 /*
67 * The syslog log levels defined in RFC 5424 match the U-Boot ones up to
68 * level 7 (debug).
69 */
70 log_level = rec->level;
71 if (log_level > 7)
72 log_level = 7;
73 /* Leave high bits as 0 to write a 'kernel message' */
74
75 /* Write log message to buffer */
76 append(&ptr, msg_end, "<%u>", log_level);
77 log_hostname = env_get("log_hostname");
78 if (log_hostname)
79 append(&ptr, msg_end, "%s ", log_hostname);
80 append(&ptr, msg_end, "uboot: ");
Heinrich Schuchardtdde173a2020-06-17 21:52:45 +020081 if (fmt & BIT(LOGF_LEVEL))
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +010082 append(&ptr, msg_end, "%s.",
83 log_get_level_name(rec->level));
Heinrich Schuchardtdde173a2020-06-17 21:52:45 +020084 if (fmt & BIT(LOGF_CAT))
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +010085 append(&ptr, msg_end, "%s,",
86 log_get_cat_name(rec->cat));
Heinrich Schuchardtdde173a2020-06-17 21:52:45 +020087 if (fmt & BIT(LOGF_FILE))
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +010088 append(&ptr, msg_end, "%s:", rec->file);
Heinrich Schuchardtdde173a2020-06-17 21:52:45 +020089 if (fmt & BIT(LOGF_LINE))
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +010090 append(&ptr, msg_end, "%d-", rec->line);
Heinrich Schuchardtdde173a2020-06-17 21:52:45 +020091 if (fmt & BIT(LOGF_FUNC))
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +010092 append(&ptr, msg_end, "%s()", rec->func);
Heinrich Schuchardtdde173a2020-06-17 21:52:45 +020093 if (fmt & BIT(LOGF_MSG))
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +010094 append(&ptr, msg_end, "%s%s",
Heinrich Schuchardtdde173a2020-06-17 21:52:45 +020095 fmt != BIT(LOGF_MSG) ? " " : "", rec->msg);
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +010096 /* Consider trailing 0x00 */
97 ptr++;
98
99 debug("log message: '%s'\n", log_msg);
100
101 /* Broadcast message */
102 bcast_ip.s_addr = 0xFFFFFFFFL;
103 net_set_udp_header((uchar *)iphdr, bcast_ip, 514, 514, ptr - log_msg);
104 net_send_packet((uchar *)msg, ptr - msg);
105
106out:
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +0100107 return ret;
108}
109
110LOG_DRIVER(syslog) = {
111 .name = "syslog",
112 .emit = log_syslog_emit,
Heinrich Schuchardtbefadde2020-02-26 21:48:16 +0100113};