| /* |
| * 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; |
| } |
