/**************************************************************** Copyright 1989, 1991, 1992 by Carnegie Mellon University All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of CMU not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ******************************************************************/ /* * Copyright (c) 1983,1988 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that this notice is preserved and that due credit is given * to the University of California at Berkeley. The name of the University * may not be used to endorse or promote products derived from this * software without specific prior written permission. This software * is provided ``as is'' without express or implied warranty. */ #include #if HAVE_STDLIB_H #include #endif #if HAVE_UNISTD_H #include #endif #if HAVE_STRING_H #include #else #include #endif #include #if HAVE_SYS_PARAM_H #include #endif #if HAVE_SYS_SELECT_H #include #endif #if HAVE_NETINET_IN_H #include #endif #if HAVE_ARPA_INET_H #include #endif #if HAVE_WINSOCK_H #include #include "winstub.h" #endif #if HAVE_SYS_SOCKET_H #include #endif #if HAVE_NETDB_H #include #endif #include "main.h" #include "asn1.h" #include "snmp_api.h" #include "snmp_impl.h" #include "snmp_client.h" #include "mib.h" #include "snmp.h" #include "netstat.h" static char *inetname (struct in_addr); struct stat_table { int entry; /* entry number in table */ /* format string to printf(description, value, plural(value)); */ /* warning: the %d must be before the %s */ char description[80]; }; static oid oid_ipstats[] = {1, 3, 6, 1, 2, 1, 4, 0, 0}; struct stat_table ip_stattab[] = { {3, "%d total datagram%s received"}, {4, "%d datagram%s with header errors"}, {5, "%d datagram%s with an invalid destination address"}, {6, "%d datagram%s forwarded"}, {7, "%d datagram%s with unknown protocol"}, {8, "%d datagram%s discarded"}, {9, "%d datagram%s delivered"}, {10, "%d output datagram request%s"}, {11, "%d output datagram%s discarded"}, {12, "%d datagram%s with no route"}, {14, "%d fragment%s received"}, {15, "%d datagram%s reassembled"}, {16, "%d reassembly failure%s"}, {17, "%d datagram%s fragmented"}, {18, "%d fragmentation failure%s"}, {19, "%d fragment%s created"} }; static oid oid_udpstats[] = {1, 3, 6, 1, 2, 1, 7, 0, 0}; struct stat_table udp_stattab[] = { {1, "%d total datagram%s received"}, {2, "%d datagram%s to invalid port"}, {3, "%d datagram%s dropped due to errors"}, {4, "%d output datagram request%s"} }; static oid oid_tcpstats[] = {1, 3, 6, 1, 2, 1, 6, 0, 0}; struct stat_table tcp_stattab[] = { {5, "%d active open%s"}, {6, "%d passive open%s"}, {7, "%d failed attempt%s"}, {8, "%d reset%s of established connections"}, {9, "%d current established connection%s"}, {10, "%d segment%s received"}, {11, "%d segment%s sent"}, {12, "%d segment%s retransmitted"} }; static oid oid_icmpstats[] = {1, 3, 6, 1, 2, 1, 5, 0, 0}; struct stat_table icmp_stattab[] = { {1, "%d total message%s received"}, {2, "%d message%s dropped due to errors"}, {14, "%d ouput message request%s"}, {15, "%d output message%s discarded"} }; struct stat_table icmp_inhistogram[] = { {3, "Destination unreachable: %d"}, {4, "Time Exceeded: %d"}, {5, "Parameter Problem: %d"}, {6, "Source Quench: %d"}, {7, "Redirect: %d"}, {8, "Echo Request: %d"}, {9, "Echo Reply: %d"}, {10, "Timestamp Request: %d"}, {11, "Timestamp Reply: %d"}, {12, "Address Mask Request: %d"}, {13, "Addrss Mask Reply:%d"}, }; struct stat_table icmp_outhistogram[] = { {16, "Destination unreachable: %d"}, {17, "Time Exceeded: %d"}, {18, "Parameter Problem: %d"}, {19, "Source Quench: %d"}, {20, "Redirect: %d"}, {21, "Echo Request: %d"}, {22, "Echo Reply: %d"}, {23, "Timestamp Request: %d"}, {24, "Timestamp Reply: %d"}, {25, "Address Mask Request: %d"}, {26, "Addrss Mask Reply:%d"}, }; struct tcpconn_entry { oid instance[10]; struct in_addr localAddress; int locAddrSet; u_short localPort; int locPortSet; struct in_addr remoteAddress; int remAddrSet; u_short remotePort; int remPortSet; int state; int stateSet; struct tcpconn_entry *next; }; struct udp_entry { oid instance[5]; struct in_addr localAddress; int locAddrSet; u_short localPort; int locPortSet; struct udp_entry *next; }; #define TCPCONN_STATE 1 #define TCPCONN_LOCADDR 2 #define TCPCONN_LOCPORT 3 #define TCPCONN_REMADDR 4 #define TCPCONN_REMPORT 5 static oid oid_tcpconntable[] = {1, 3, 6, 1, 2, 1, 6, 13, 1}; #define TCP_ENTRY 9 #define UDP_LOCADDR 1 #define UDP_LOCPORT 2 static oid oid_udptable[] = {1, 3, 6, 1, 2, 1, 7, 5, 1}; #define UDP_ENTRY 9 const char *tcpstates[] = { "", "CLOSED", "LISTEN", "SYNSENT", "SYNRECEIVED", "ESTABLISHED", "FINWAIT1", "FINWAIT2", "CLOSEWAIT", "LASTACK", "CLOSING", "TIMEWAIT" }; #define TCP_NSTATES 11 int validUShortAssign( unsigned short *, int, const char *); /* * Print a summary of connections related to an Internet * protocol (currently only TCP). For TCP, also give state of connection. */ void protopr (const char *name) { struct tcpconn_entry *tcpconn = NULL, *tcplast = NULL, *tp, *newtp; struct udp_entry *udpconn = NULL, *udplast = NULL, *up, *newup; struct snmp_pdu *request = NULL, *response = NULL; struct variable_list *vp; oid *instance; int first, status; response = NULL; if (strcmp(name, "tcp") == 0) { request = snmp_pdu_create(SNMP_MSG_GETNEXT); snmp_add_null_var(request, oid_tcpconntable, sizeof(oid_tcpconntable)/sizeof(oid)); status = STAT_SUCCESS; } else status = STAT_TIMEOUT; while (status == STAT_SUCCESS) { if (response) snmp_free_pdu(response); response = NULL; status = snmp_synch_response(Session, request, &response); if (status != STAT_SUCCESS || response->errstat != SNMP_ERR_NOERROR){ snmp_sess_perror("SNMP request failed", Session); break; } vp = response->variables; if (!vp) break; if (vp->name_length != 20 || memcmp(vp->name, oid_tcpconntable, sizeof(oid_tcpconntable))){ break; } request = snmp_pdu_create(SNMP_MSG_GETNEXT); snmp_add_null_var(request, vp->name, vp->name_length); instance = vp->name + 10; for(tp = tcpconn; tp != NULL; tp = tp->next){ if (!memcmp(instance, tp->instance, sizeof(tp->instance))) break; } if (tp == NULL){ tp = (struct tcpconn_entry *)calloc(1, sizeof(struct tcpconn_entry)); if (tp == NULL) break; if (tcplast != NULL) tcplast->next = tp; tcplast = tp; if (tcpconn == NULL) tcpconn = tp; memmove(tp->instance, instance, sizeof(tp->instance)); } if (vp->name[TCP_ENTRY] == TCPCONN_STATE){ tp->state = *vp->val.integer; tp->stateSet = 1; } if (vp->name[TCP_ENTRY] == TCPCONN_LOCADDR){ memmove(&tp->localAddress, vp->val.string, sizeof(u_long)); tp->locAddrSet = 1; } if (vp->name[TCP_ENTRY] == TCPCONN_LOCPORT){ if (validUShortAssign( &tp->localPort, *vp->val.integer, "TCPCONN_LOCPORT")) tp->locPortSet = 1; } if (vp->name[TCP_ENTRY] == TCPCONN_REMADDR){ memmove(&tp->remoteAddress, vp->val.string, sizeof(u_long)); tp->remAddrSet = 1; } if (vp->name[TCP_ENTRY] == TCPCONN_REMPORT){ if (validUShortAssign( &tp->remotePort, *vp->val.integer, "TCPCONN_REMPORT")) tp->remPortSet = 1; } } if (response) snmp_free_pdu(response); response = NULL; for(first = 1, tp = tcpconn, newtp = NULL; tp != NULL; tp = tp->next) { if (newtp) free(newtp); newtp = tp; if (!(tp->stateSet && tp->locAddrSet && tp->locPortSet && tp->remAddrSet && tp->remPortSet)){ printf("incomplete entry\n"); continue; } if (!aflag && tp->state == MIB_TCPCONNSTATE_LISTEN) continue; if (first){ printf("Active Internet (%s) Connections", name); if (aflag) printf(" (including servers)"); putchar('\n'); printf("%-5.5s %-28.28s %-28.28s %s\n", "Proto", "Local Address", "Foreign Address", "(state)"); first = 0; } printf("%-5.5s ", "tcp"); inetprint(&tp->localAddress, tp->localPort, "tcp"); inetprint(&tp->remoteAddress, tp->remotePort, "tcp"); if (tp->state < 1 || tp->state > TCP_NSTATES) printf(" %d", tp->state); else printf(" %s", tcpstates[tp->state]); putchar('\n'); } if(newtp) free(newtp); response = NULL; if (strcmp (name, "udp") == 0) { request = snmp_pdu_create(SNMP_MSG_GETNEXT); snmp_add_null_var(request, oid_udptable, sizeof(oid_udptable)/sizeof(oid)); status = STAT_SUCCESS; } else status = STAT_TIMEOUT; while (status == STAT_SUCCESS) { if (response) snmp_free_pdu(response); response = NULL; status = snmp_synch_response(Session, request, &response); if (status != STAT_SUCCESS || response->errstat != SNMP_ERR_NOERROR){ fprintf(stderr, "SNMP request failed\n"); break; } vp = response->variables; if (!vp) break; if (vp->name_length != 15 || memcmp(vp->name, oid_udptable, sizeof(oid_udptable))){ break; } request = snmp_pdu_create(SNMP_MSG_GETNEXT); snmp_add_null_var(request, vp->name, vp->name_length); instance = vp->name + 10; for(up = udpconn; up != NULL; up = up->next){ if (!memcmp(instance, up->instance, sizeof(up->instance))) break; } if (up == NULL){ up = (struct udp_entry *)calloc(1, sizeof(struct udp_entry)); if (up == NULL) break; if (udplast != NULL) udplast->next = up; udplast = up; if (udpconn == NULL) udpconn = up; memmove(up->instance, instance, sizeof(up->instance)); } if (vp->name[UDP_ENTRY] == UDP_LOCADDR){ memmove(&up->localAddress, vp->val.string, sizeof(u_long)); up->locAddrSet = 1; } if (vp->name[UDP_ENTRY] == UDP_LOCPORT){ if (validUShortAssign( &up->localPort, *vp->val.integer, "UDP_LOCPORT")) up->locPortSet = 1; } } if (response) snmp_free_pdu(response); response = NULL; for(first = 1, up = udpconn, newup = NULL; up != NULL; up = up->next){ if (newup) free(newup); newup = up; if (!(up->locAddrSet && up->locPortSet)){ printf("incomplete entry\n"); continue; } if (first){ printf("Active Internet (%s) Connections", name); putchar('\n'); printf("%-5.5s %-28.28s\n", "Proto", "Local Address"); first = 0; } printf("%-5.5s ", "udp"); inetprint(&up->localAddress, up->localPort, "udp"); putchar('\n'); } if(newup) free(newup); } int validUShortAssign( unsigned short * pushort, int ival, const char * errstr) { u_long ulval = (u_long)ival; if (ival > 65535) { printf("Warning: %s value %ld (0x%lx) is not a port address\n", errstr, ulval, ulval); return 0; } *pushort = (unsigned short)ulval; return 1; } /* * Dump UDP statistics structure. */ void udp_stats(void) { oid varname[MAX_OID_LEN], *udpentry; size_t varname_len; struct variable_list *var; int count; struct stat_table *sp = udp_stattab; memmove(varname, oid_udpstats, sizeof(oid_udpstats)); varname_len = sizeof(oid_udpstats) / sizeof(oid); udpentry = varname + 7; printf("udp:\n"); count = sizeof(udp_stattab) / sizeof (struct stat_table); while (count--){ *udpentry = sp->entry; var = getvarbyname(Session, varname, varname_len); if (var && var->val.integer){ putchar('\t'); printf(sp->description, *var->val.integer, plural((int)*var->val.integer)); putchar('\n'); } if (var) snmp_free_var(var); sp++; } } /* * Dump TCP statistics structure. */ void tcp_stats(void) { oid varname[MAX_OID_LEN], *tcpentry; size_t varname_len; struct variable_list *var; int count; struct stat_table *sp = tcp_stattab; memmove(varname, oid_tcpstats, sizeof(oid_tcpstats)); varname_len = sizeof(oid_tcpstats) / sizeof(oid); tcpentry = varname + 7; printf("tcp:\n"); count = sizeof(tcp_stattab) / sizeof (struct stat_table); while (count--){ *tcpentry = sp->entry; var = getvarbyname(Session, varname, varname_len); if (var && var->val.integer){ putchar('\t'); printf(sp->description, *var->val.integer, plural((int)*var->val.integer)); putchar('\n'); } if (var) snmp_free_var(var); sp++; } } /* * Dump IP statistics structure. */ void ip_stats(void) { oid varname[MAX_OID_LEN], *ipentry; size_t varname_len; struct variable_list *var; int count; struct stat_table *sp = ip_stattab; memmove(varname, oid_ipstats, sizeof(oid_ipstats)); varname_len = sizeof(oid_ipstats) / sizeof(oid); ipentry = varname + 7; printf("ip:\n"); count = sizeof(ip_stattab) / sizeof (struct stat_table); while (count--){ *ipentry = sp->entry; var = getvarbyname(Session, varname, varname_len); if (var && var->val.integer){ putchar('\t'); printf(sp->description, *var->val.integer, plural((int)*var->val.integer)); putchar('\n'); } if (var) snmp_free_var(var); sp++; } } /* * Dump ICMP statistics. */ void icmp_stats(void) { oid varname[MAX_OID_LEN], *icmpentry; size_t varname_len; struct variable_list *var; int count, first; struct stat_table *sp; memmove(varname, oid_icmpstats, sizeof(oid_icmpstats)); varname_len = sizeof(oid_icmpstats) / sizeof(oid); icmpentry = varname + 7; printf("icmp:\n"); sp = icmp_stattab; count = sizeof(icmp_stattab) / sizeof (struct stat_table); while (count--){ *icmpentry = sp->entry; var = getvarbyname(Session, varname, varname_len); if (var && var->val.integer){ putchar('\t'); printf(sp->description, *var->val.integer, plural((int)*var->val.integer)); putchar('\n'); } if (var) snmp_free_var(var); sp++; } sp = icmp_outhistogram; first = 1; count = sizeof(icmp_outhistogram) / sizeof (struct stat_table); while (count--){ *icmpentry = sp->entry; var = getvarbyname(Session, varname, varname_len); if (var && var->val.integer && *var->val.integer != 0){ if (first){ printf("\tOutput Histogram:\n"); first = 0; } printf("\t\t"); printf(sp->description, *var->val.integer, plural((int)*var->val.integer)); putchar('\n'); } if (var) snmp_free_var(var); sp++; } sp = icmp_inhistogram; first = 1; count = sizeof(icmp_inhistogram) / sizeof (struct stat_table); while (count--){ *icmpentry = sp->entry; var = getvarbyname(Session, varname, varname_len); if (var && var->val.integer && *var->val.integer != 0){ if (first){ printf("\tInput Histogram:\n"); first = 0; } printf("\t\t"); printf(sp->description, *var->val.integer, plural((int)*var->val.integer)); putchar('\n'); } if (var) snmp_free_var(var); sp++; } } /* * Pretty print an Internet address (net address + port). * If the nflag was specified, use numbers instead of names. */ void inetprint(struct in_addr *in, u_short port, const char *proto) { struct servent *sp = 0; char line[80], *cp; int width; sprintf(line, "%.*s.", 22, inetname(*in)); cp = (char *) strchr(line, '\0'); if (!nflag && port) sp = getservbyport(htons(port), proto); if (sp || port == 0) sprintf(cp, "%.8s", sp ? sp->s_name : "*"); else sprintf(cp, "%d", port); width = 28; printf(" %-*.*s", width, width, line); } /* * Construct an Internet address representation. * If the nflag has been supplied, give * numeric value, otherwise try for symbolic name. */ static char * inetname(struct in_addr in) { register char *cp; static char line[50]; struct hostent *hp; struct netent *np; static char domain[MAXHOSTNAMELEN + 1]; static int first = 1; if (first && !nflag) { first = 0; if (gethostname(domain, MAXHOSTNAMELEN) == 0 && (cp = (char *) strchr(domain, '.'))) (void) strcpy(domain, cp + 1); else domain[0] = 0; } cp = 0; if (!nflag && in.s_addr != INADDR_ANY) { u_long net = inet_netof(in); u_long lna = inet_lnaof(in); if (lna == INADDR_ANY) { np = getnetbyaddr(net, AF_INET); if (np) cp = np->n_name; } if (cp == 0) { hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET); if (hp) { if ((cp = (char *) strchr(hp->h_name, '.')) && !strcmp(cp + 1, domain)) *cp = 0; cp = (char *)hp->h_name; } } } if (in.s_addr == INADDR_ANY) strcpy(line, "*"); else if (cp) strcpy(line, cp); else { in.s_addr = ntohl(in.s_addr); #define C(x) (unsigned)((x) & 0xff) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); } return (line); }