1 files changed, 71 insertions, 0 deletions
diff --git a/src/pmdas/linux/proc_net_tcp.c b/src/pmdas/linux/proc_net_tcp.c
new file mode 100644
index 0000000..52f59b0
--- /dev/null
+++ b/src/pmdas/linux/proc_net_tcp.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2014 Red Hat.
+ * Copyright (c) 1999,2004 Silicon Graphics, Inc.  All Rights Reserved.
+ * This code contributed by Michal Kara (lemming@arthur.plbohnice.cz)
+ * 
+ * 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 the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include <ctype.h>
+#include "pmapi.h"
+#include "pmda.h"
+#include "indom.h"
+#include "proc_net_tcp.h"
+
+#define MYBUFSZ (1<<14) /*16k*/
+
+int
+refresh_proc_net_tcp(proc_net_tcp_t *proc_net_tcp)
+{
+    FILE *fp;
+    char buf[MYBUFSZ]; 
+    char *p = buf;
+    char *q;
+    unsigned int n;
+    ssize_t got = 0;
+    ptrdiff_t remnant = 0;
+
+    memset(proc_net_tcp, 0, sizeof(*proc_net_tcp));
+
+    if ((fp = linux_statsfile("/proc/net/tcp", buf, sizeof(buf))) == NULL)
+	return -oserror();
+
+    /* skip header */
+    if (fgets(buf, sizeof(buf), fp) == NULL) {
+    	/* oops, no header! */
+	fclose(fp);
+	return -oserror();
+    }
+    for (buf[0]='\0';;) {
+	q = strchrnul(p, '\n');
+	if (*q == '\n') {
+	    if (1 == sscanf(p, " %*s %*s %*s %x", &n)
+		&& n < _PM_TCP_LAST) {
+		proc_net_tcp->stat[n]++;
+            }
+	    p = q + 1;
+	    continue;
+	}
+	remnant = (q - p);
+	if (remnant > 0 && p != buf) 
+	    memmove(buf, p, remnant);
+
+	got = read(fileno(fp), buf + remnant, MYBUFSZ - remnant - 1);
+	if (got <= 0)
+	    break;
+
+	buf[remnant + got] = '\0';
+	p = buf;
+    }
+
+    fclose(fp);
+    return 0;
+}