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Diffstat (limited to 'agent/mibgroup/mibII/kernel_linux.c')
-rw-r--r--agent/mibgroup/mibII/kernel_linux.c221
1 files changed, 221 insertions, 0 deletions
diff --git a/agent/mibgroup/mibII/kernel_linux.c b/agent/mibgroup/mibII/kernel_linux.c
new file mode 100644
index 0000000..bb6f867
--- /dev/null
+++ b/agent/mibgroup/mibII/kernel_linux.c
@@ -0,0 +1,221 @@
+/*
+ * Linux kernel interface
+ *
+ */
+
+#include <net-snmp/net-snmp-config.h>
+#include <net-snmp/net-snmp-includes.h>
+#include <net-snmp/agent/net-snmp-agent-includes.h>
+
+#include "util_funcs.h"
+
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+#include <sys/types.h>
+#if HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+#include "kernel_linux.h"
+
+struct ip_mib cached_ip_mib;
+struct icmp_mib cached_icmp_mib;
+struct tcp_mib cached_tcp_mib;
+struct udp_mib cached_udp_mib;
+
+#define IP_STATS_LINE "Ip: %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu"
+#define ICMP_STATS_LINE "Icmp: %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu"
+#define TCP_STATS_LINE "Tcp: %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu"
+#define UDP_STATS_LINE "Udp: %lu %lu %lu %lu"
+#define UDP6_STATS_LINE "Udp6"
+
+#define IP_STATS_PREFIX_LEN 4
+#define ICMP_STATS_PREFIX_LEN 6
+#define TCP_STATS_PREFIX_LEN 5
+#define UDP_STATS_PREFIX_LEN 5
+#define UDP6_STATS_PREFIX_LEN 4
+
+
+int
+linux_read_mibII_stats(void)
+{
+ FILE *in = fopen("/proc/net/snmp", "r");
+#ifdef NETSNMP_ENABLE_IPV6
+ FILE *in6;
+ unsigned long value;
+#endif
+ char line[1024];
+
+ if (!in) {
+ DEBUGMSGTL(("mibII/kernel_linux","Unable to open /proc/net/snmp"));
+ return -1;
+ }
+
+
+ while (line == fgets(line, sizeof(line), in)) {
+ if (!strncmp(line, IP_STATS_LINE, IP_STATS_PREFIX_LEN)) {
+ sscanf(line, IP_STATS_LINE,
+ &cached_ip_mib.ipForwarding,
+ &cached_ip_mib.ipDefaultTTL,
+ &cached_ip_mib.ipInReceives,
+ &cached_ip_mib.ipInHdrErrors,
+ &cached_ip_mib.ipInAddrErrors,
+ &cached_ip_mib.ipForwDatagrams,
+ &cached_ip_mib.ipInUnknownProtos,
+ &cached_ip_mib.ipInDiscards,
+ &cached_ip_mib.ipInDelivers,
+ &cached_ip_mib.ipOutRequests,
+ &cached_ip_mib.ipOutDiscards,
+ &cached_ip_mib.ipOutNoRoutes,
+ &cached_ip_mib.ipReasmTimeout,
+ &cached_ip_mib.ipReasmReqds,
+ &cached_ip_mib.ipReasmOKs,
+ &cached_ip_mib.ipReasmFails,
+ &cached_ip_mib.ipFragOKs,
+ &cached_ip_mib.ipFragFails,
+ &cached_ip_mib.ipFragCreates);
+ cached_ip_mib.ipRoutingDiscards = 0; /* XXX */
+ } else if (!strncmp(line, ICMP_STATS_LINE, ICMP_STATS_PREFIX_LEN)) {
+ sscanf(line, ICMP_STATS_LINE,
+ &cached_icmp_mib.icmpInMsgs,
+ &cached_icmp_mib.icmpInErrors,
+ &cached_icmp_mib.icmpInDestUnreachs,
+ &cached_icmp_mib.icmpInTimeExcds,
+ &cached_icmp_mib.icmpInParmProbs,
+ &cached_icmp_mib.icmpInSrcQuenchs,
+ &cached_icmp_mib.icmpInRedirects,
+ &cached_icmp_mib.icmpInEchos,
+ &cached_icmp_mib.icmpInEchoReps,
+ &cached_icmp_mib.icmpInTimestamps,
+ &cached_icmp_mib.icmpInTimestampReps,
+ &cached_icmp_mib.icmpInAddrMasks,
+ &cached_icmp_mib.icmpInAddrMaskReps,
+ &cached_icmp_mib.icmpOutMsgs,
+ &cached_icmp_mib.icmpOutErrors,
+ &cached_icmp_mib.icmpOutDestUnreachs,
+ &cached_icmp_mib.icmpOutTimeExcds,
+ &cached_icmp_mib.icmpOutParmProbs,
+ &cached_icmp_mib.icmpOutSrcQuenchs,
+ &cached_icmp_mib.icmpOutRedirects,
+ &cached_icmp_mib.icmpOutEchos,
+ &cached_icmp_mib.icmpOutEchoReps,
+ &cached_icmp_mib.icmpOutTimestamps,
+ &cached_icmp_mib.icmpOutTimestampReps,
+ &cached_icmp_mib.icmpOutAddrMasks,
+ &cached_icmp_mib.icmpOutAddrMaskReps);
+ } else if (!strncmp(line, TCP_STATS_LINE, TCP_STATS_PREFIX_LEN)) {
+ int ret = sscanf(line, TCP_STATS_LINE,
+ &cached_tcp_mib.tcpRtoAlgorithm,
+ &cached_tcp_mib.tcpRtoMin,
+ &cached_tcp_mib.tcpRtoMax,
+ &cached_tcp_mib.tcpMaxConn,
+ &cached_tcp_mib.tcpActiveOpens,
+ &cached_tcp_mib.tcpPassiveOpens,
+ &cached_tcp_mib.tcpAttemptFails,
+ &cached_tcp_mib.tcpEstabResets,
+ &cached_tcp_mib.tcpCurrEstab,
+ &cached_tcp_mib.tcpInSegs,
+ &cached_tcp_mib.tcpOutSegs,
+ &cached_tcp_mib.tcpRetransSegs,
+ &cached_tcp_mib.tcpInErrs,
+ &cached_tcp_mib.tcpOutRsts);
+ cached_tcp_mib.tcpInErrsValid = (ret > 12) ? 1 : 0;
+ cached_tcp_mib.tcpOutRstsValid = (ret > 13) ? 1 : 0;
+ } else if (!strncmp(line, UDP_STATS_LINE, UDP_STATS_PREFIX_LEN)) {
+ sscanf(line, UDP_STATS_LINE,
+ &cached_udp_mib.udpInDatagrams,
+ &cached_udp_mib.udpNoPorts,
+ &cached_udp_mib.udpInErrors,
+ &cached_udp_mib.udpOutDatagrams);
+ }
+ }
+ fclose(in);
+
+#ifdef NETSNMP_ENABLE_IPV6
+ in6 = fopen("/proc/net/snmp6", "r");
+ if (in6) {
+
+ while (line == fgets(line, sizeof(line), in6)) {
+
+ if (('U' != line[0]) ||
+ (0 != strncmp(line, UDP6_STATS_LINE, UDP6_STATS_PREFIX_LEN)))
+ continue;
+
+ sscanf(line, "%*s %lu" , &value);
+
+ if ('O' == line[4]) /* Udp6OutDatagrams */
+ cached_udp_mib.udpOutDatagrams += value;
+ else if ('N' == line[4]) /* Udp6NoPorts */
+ cached_udp_mib.udpNoPorts += value;
+ else if ('D' == line[6]) /* Udp6InDatagrams */
+ cached_udp_mib.udpInDatagrams += value;
+ else if ('E' == line[6]) /* Udp6InErrors */
+ cached_udp_mib.udpInErrors += value;
+
+ }
+ fclose(in6);
+ } else {
+ DEBUGMSGTL(("mibII/kernel_linux","Unable to open /proc/net/snmp6"));
+ }
+
+#endif
+
+ /*
+ * Tweak illegal values:
+ *
+ * valid values for ipForwarding are 1 == yup, 2 == nope
+ * a 0 is forbidden, so patch:
+ */
+ if (!cached_ip_mib.ipForwarding)
+ cached_ip_mib.ipForwarding = 2;
+
+ /*
+ * 0 is illegal for tcpRtoAlgorithm
+ * so assume `other' algorithm:
+ */
+ if (!cached_tcp_mib.tcpRtoAlgorithm)
+ cached_tcp_mib.tcpRtoAlgorithm = 1;
+ return 0;
+}
+
+int
+linux_read_ip_stat(struct ip_mib *ipstat)
+{
+ memset((char *) ipstat, (0), sizeof(*ipstat));
+ if (linux_read_mibII_stats() == -1)
+ return -1;
+ memcpy((char *) ipstat, (char *) &cached_ip_mib, sizeof(*ipstat));
+ return 0;
+}
+
+int
+linux_read_icmp_stat(struct icmp_mib *icmpstat)
+{
+ memset((char *) icmpstat, (0), sizeof(*icmpstat));
+ if (linux_read_mibII_stats() == -1)
+ return -1;
+ memcpy((char *) icmpstat, (char *) &cached_icmp_mib,
+ sizeof(*icmpstat));
+ return 0;
+}
+
+int
+linux_read_tcp_stat(struct tcp_mib *tcpstat)
+{
+ memset((char *) tcpstat, (0), sizeof(*tcpstat));
+ if (linux_read_mibII_stats() == -1)
+ return -1;
+ memcpy((char *) tcpstat, (char *) &cached_tcp_mib, sizeof(*tcpstat));
+ return 0;
+}
+
+int
+linux_read_udp_stat(struct udp_mib *udpstat)
+{
+ memset((char *) udpstat, (0), sizeof(*udpstat));
+ if (linux_read_mibII_stats() == -1)
+ return -1;
+ memcpy((char *) udpstat, (char *) &cached_udp_mib, sizeof(*udpstat));
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-03 15:34:27 +0000