From d1f82d7e4d130d3d8b3b9a9ffa0186fa58c41ebd Mon Sep 17 00:00:00 2001
From: deuce <>
Date: Fri, 10 Nov 2006 18:51:05 +0000
Subject: [PATCH] Cross-platform syslog logging stuff. Allows UDP syslog
logging on any system... On Win32, will default to logging to localhost
whereas on *nix, the openlog(), syslog(), and vsyslog() functions are
wrappers if no log host is set with xp_set_loghost()
Untested, unused, not part of xpdev builds currently.
---
src/xpdev/xp_syslog.c | 152 ++++++++++++++++++++++++++++++++++++++++++
src/xpdev/xp_syslog.h | 57 ++++++++++++++++
2 files changed, 209 insertions(+)
create mode 100644 src/xpdev/xp_syslog.c
create mode 100644 src/xpdev/xp_syslog.h
diff --git a/src/xpdev/xp_syslog.c b/src/xpdev/xp_syslog.c
new file mode 100644
index 0000000000..a03669b829
--- /dev/null
+++ b/src/xpdev/xp_syslog.c
@@ -0,0 +1,152 @@
+#include <stdarg.h>
+#ifdef __unix__
+#include <syslog.h>
+#endif
+
+#include "xp_syslog.h"
+#include "sockwrap.h"
+#include "gen_defs.h"
+
+static SOCKET syslog_sock=INVALID_SOCKET;
+static char log_host[1025]=
+#ifdef __unix__
+"";
+#else
+"localhost";
+#endif
+
+static char syslog_tag[33]="undefined";
+static int default_facility=LOG_USER;
+
+static u_long resolve_ip(char *addr)
+{
+ HOSTENT* host;
+ char* p;
+
+ if(*addr==0)
+ return((u_long)INADDR_NONE);
+
+ for(p=addr;*p;p++)
+ if(*p!='.' && !isdigit(*p))
+ break;
+ if(!(*p))
+ return(inet_addr(addr));
+ if((host=gethostbyname(addr))==NULL)
+ return((u_long)INADDR_NONE);
+ return(*((ulong*)host->h_addr_list[0]));
+}
+
+void xp_set_loghost(const char *hostname)
+{
+ SAFECOPY(log_host, hostname);
+}
+
+void xp_openlog(const char *ident, int logopt, int facility)
+{
+ int sock;
+ SOCKADDR_IN syslog_addr;
+ socklen_t syslog_len;
+
+#ifdef __unix__
+ if(!log_host[0]) {
+ openlog(ident,logopt,facility);
+ return;
+ }
+#endif
+
+ memset(&syslog_addr, 0, sizeof(syslog_addr));
+ syslog_addr.sin_addr.s_addr=INADDR_ANY;
+ syslog_addr.sin_family=AF_INET;
+ syslog_addr.sin_port=htons(SYSLOG_PORT);
+
+ syslog_sock=socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if(syslog_sock==INVALID_SOCKET)
+ return;
+ /*
+ * If the bind() fails, that's OK... we're just trying to set the source port to
+ * 514 here as reccomended by the RFC. This isn't REQUIRED though.
+ */
+ bind(syslog_sock, (struct sockaddr *)&syslog_addr, sizeof(syslog_addr));
+ syslog_addr.sin_addr.s_addr=resolve_ip(log_host);
+ if(connect(syslog_sock, (struct sockaddr *)&syslog_addr, sizeof(syslog_addr))) {
+ closesocket(syslog_sock);
+ syslog_sock=INVALID_SOCKET;
+ return;
+ }
+
+ SAFECOPY(syslog_tag, ident);
+}
+
+void xp_vsyslog(int priority, const char *message, va_list va)
+{
+ int orig_errno=ERROR_VALUE;
+ time_t now;
+ char timestr[32];
+ char msg_to_send[1025];
+ char format[1025];
+ char *msg_end;
+ char *p;
+ int i;
+
+#ifdef __unix__
+ if(!log_host[0]) {
+ vsyslog(priority, message, va);
+ return;
+ }
+#endif
+
+ /* Ensure we can even send this thing */
+ if(syslog_sock==INVALID_SOCKET)
+ return;
+
+ /* Check for valid priority */
+ if(priority & ~(LOG_PRIMASK|LOG_FACMASK)) {
+ i=priority;
+ /* Fix to something legal */
+ priority &= (LOG_PRIMASK|LOG_FACMASK);
+ /* Ooooo... re-entrant! */
+ syslog(priority,"Unknown priority %x",i);
+ }
+
+ /* Set default facility if needed */
+ if(!(priority & LOG_FACMASK))
+ priority |= default_facility;
+
+ time(&now);
+ ctime_r(&now, timestr);
+ /* Remove trailing \n */
+ timestr[24]=0;
+
+ snprintf(format, sizeof(format), "<%d>%.15s %.32s: %s", priority, timestr+4 /* Remove day of week */, syslog_tag, message);
+ format[sizeof(format)-1]=0;
+ vsnprintf(msg_to_send, sizeof(msg_to_send), format, va);
+ msg_to_send[sizeof(msg_to_send)-1]=0;
+
+ /* Clean out invalid chars (as per RFC3164) */
+ msg_end=msg_to_send+sizeof(msg_to_send)-1;
+ for(p=msg_to_send; *p; p++) {
+ if(*p<32) {
+ i=strlen(p);
+ memmove(p, p+1, i);
+ *p='^';
+ p++;
+ *p|=0x40;
+ if(p+i > msg_end)
+ *msg_end=0;
+ else
+ *(p+i)=0;
+ }
+ else if(*p>126)
+ *p=' ';
+ }
+ sendsocket(syslog_sock, msg_to_send, strlen(msg_to_send));
+}
+
+void xp_syslog(int priority, const char *message, ...)
+{
+ va_list va;
+
+ va_start(va, message);
+ vsyslog(priority, message, va);
+ va_end(va);
+}
diff --git a/src/xpdev/xp_syslog.h b/src/xpdev/xp_syslog.h
new file mode 100644
index 0000000000..0e890e3a43
--- /dev/null
+++ b/src/xpdev/xp_syslog.h
@@ -0,0 +1,57 @@
+#ifndef XP_SYSLOG_H_
+#define XP_SYSLOG_H_
+#include <stdarg.h>
+
+
+/* priorities */
+#define LOG_EMERG 0 /* system is unusable */
+#define LOG_ALERT 1 /* action must be taken immediately */
+#define LOG_CRIT 2 /* critical conditions */
+#define LOG_ERR 3 /* error conditions */
+#define LOG_WARNING 4 /* warning conditions */
+#define LOG_NOTICE 5 /* normal but significant condition */
+#define LOG_INFO 6 /* informational */
+#define LOG_DEBUG 7 /* debug-level messages */
+
+#define LOG_KERN (0<<3) /* kernel messages */
+#define LOG_USER (1<<3) /* random user-level messages */
+#define LOG_MAIL (2<<3) /* mail system */
+#define LOG_DAEMON (3<<3) /* system daemons */
+#define LOG_AUTH (4<<3) /* authorization messages */
+#define LOG_SYSLOG (5<<3) /* messages generated internally by syslogd */
+#define LOG_LPR (6<<3) /* line printer subsystem */
+#define LOG_NEWS (7<<3) /* network news subsystem */
+#define LOG_UUCP (8<<3) /* UUCP subsystem */
+#define LOG_CRON (9<<3) /* clock daemon */
+#define LOG_AUTHPRIV (10<<3) /* authorization messages (private) */
+ /* Facility #10 clashes in DEC UNIX, where */
+ /* it's defined as LOG_MEGASAFE for AdvFS */
+ /* event logging. */
+#define LOG_FTP (11<<3) /* ftp daemon */
+#define LOG_NTP (12<<3) /* NTP subsystem */
+#define LOG_SECURITY (13<<3) /* security subsystems (firewalling, etc.) */
+#define LOG_CONSOLE (14<<3) /* /dev/console output */
+
+/* facility codes */
+#define LOG_LOCAL0 (16<<3) /* reserved for local use */
+#define LOG_LOCAL1 (17<<3) /* reserved for local use */
+#define LOG_LOCAL2 (18<<3) /* reserved for local use */
+#define LOG_LOCAL3 (19<<3) /* reserved for local use */
+#define LOG_LOCAL4 (20<<3) /* reserved for local use */
+#define LOG_LOCAL5 (21<<3) /* reserved for local use */
+#define LOG_LOCAL6 (22<<3) /* reserved for local use */
+#define LOG_LOCAL7 (23<<3) /* reserved for local use */
+
+/* Masks to extract parts */
+#define LOG_PRIMASK 0x07 /* mask to extract priority part */
+#define LOG_FACMASK 0x03f8 /* mask to extract facility part */
+
+/* Port number */
+#define SYSLOG_PORT 514
+
+void xp_set_loghost(const char *hostname);
+void xp_openlog(const char *ident, int logopt, int facility);
+void xp_vsyslog(int priority, const char *message, va_list va);
+void xp_syslog(int priority, const char *message, ...);
+
+#endif
--
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