| /* |
| * tunnel.c -- |
| * |
| * An implementation of the TUNNEL-MIB for the UCD-SNMP 4.2 |
| * agent running on Linux 2.2.x. |
| * |
| * Copyright (c) 2000 Frank Strauss <strauss@ibr.cs.tu-bs.de> |
| * |
| * 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 appears in all copies and |
| * that both that copyright notice and this permission notice appear in |
| * supporting documentation, and that the name of the author and CMU and |
| * The Regents of the University of California not be used in advertising |
| * or publicity pertaining to distribution of the software without |
| * specific written permission. |
| * |
| * THE AUTHOR AND CMU AND THE REGENTS OF THE UNIVERSITY OF CALIFORNIA |
| * DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL |
| * THE AUTHOR OR CMU OR THE REGENTS OF THE UNIVERSITY OF CALIFORNIA BE |
| * LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY |
| * DAMAGES WHATSOEVER RESULTING FROM THE 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. |
| * |
| */ |
| |
| /* |
| * NOTE: This TUNNEL-MIB implementation |
| * |
| * (a) DOES NOT implement write access on the tunnelConfigTable, |
| * i.e. no new tunnels can be created and no existing tunnels |
| * can be removed through SET operations. |
| * |
| * (b) DOES implement write access on some tunnelIfTable objects |
| * to allow reconfiguring established tunnels. This violates |
| * RFC 2667! However, the author thinks it makes sense. ;-) |
| */ |
| |
| #include <string.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <sys/time.h> |
| #include <sys/ioctl.h> |
| #include <signal.h> |
| #include <netinet/in.h> |
| #include <arpa/inet.h> |
| |
| #include <linux/if.h> |
| #include <linux/ip.h> |
| #include <linux/sockios.h> |
| #include <linux/if_tunnel.h> |
| #include <linux/if_arp.h> |
| |
| #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" |
| #include "tunnel.h" |
| |
| #ifndef MIN |
| #define MIN(a, b) (((a) < (b)) ? (a) : (b)) |
| #endif |
| #ifndef MAX |
| #define MAX(a, b) (((a) > (b)) ? (a) : (b)) |
| #endif |
| |
| |
| |
| #ifdef USING_IF_MIB_IFTABLE_IFTABLE_MODULE |
| #include "if-mib/ifTable/ifTable.h" |
| #include "if-mib/ifTable/ifTable_defs.h" |
| #else |
| /* |
| * This is used, because the TUNNEL-MIB augments ifTable. |
| */ |
| extern unsigned char *var_ifEntry(struct variable *, |
| oid *, size_t *, |
| int, size_t *, WriteMethod **); |
| #endif |
| |
| |
| /* |
| * tunnel_variables_oid: |
| * this is the top level oid that we want to register under. This |
| * is essentially a prefix, with the suffix appearing in the |
| * variable below. |
| */ |
| oid tunnel_variables_oid[] = |
| { 1, 3, 6, 1, 2, 1, 10, 131, 1, 1 }; |
| const int tunnel_len = 10; |
| |
| oid tunnel_ifEntry_oid[] = |
| { 1, 3, 6, 1, 2, 1, 10, 131, 1, 1, 1, 1 }; |
| const int tunnel_ifEntry_len = 12; |
| |
| oid tunnel_configEntry_oid[] = |
| { 1, 3, 6, 1, 2, 1, 10, 131, 1, 1, 2, 1 }; |
| const int tunnel_configEntry_len = 12; |
| |
| |
| |
| struct tunnel { |
| oid ifindex; |
| int id; |
| char *ifname; |
| int active; |
| unsigned long local; |
| unsigned long remote; |
| int encaps; |
| int hoplimit; |
| int security; |
| int tos; |
| oid config_name[MAX_OID_LEN]; |
| size_t config_length; |
| struct tunnel *next; |
| }; |
| |
| |
| |
| /* |
| * variable4 tunnel_variables: |
| * this variable defines function callbacks and type return information |
| * for the tunnel mib section |
| */ |
| |
| struct variable4 tunnel_variables[] = { |
| /* |
| * magic number , variable type , ro/rw , callback fn , L, oidsuffix |
| */ |
| #define LOCALADDRESS 1 |
| {LOCALADDRESS, ASN_IPADDRESS, RWRITE, var_tunnelIfEntry, 3, {1, 1, 1}}, |
| #define REMOTEADDRESS 2 |
| {REMOTEADDRESS, ASN_IPADDRESS, RWRITE, var_tunnelIfEntry, 3, |
| {1, 1, 2}}, |
| #define ENCAPSMETHOD 3 |
| {ENCAPSMETHOD, ASN_INTEGER, RONLY, var_tunnelIfEntry, 3, {1, 1, 3}}, |
| #define HOPLIMIT 4 |
| {HOPLIMIT, ASN_INTEGER, RWRITE, var_tunnelIfEntry, 3, {1, 1, 4}}, |
| #define SECURITY 5 |
| {SECURITY, ASN_INTEGER, RONLY, var_tunnelIfEntry, 3, {1, 1, 5}}, |
| #define TOS 6 |
| {TOS, ASN_INTEGER, RWRITE, var_tunnelIfEntry, 3, {1, 1, 6}}, |
| |
| #define IFINDEX 7 |
| {IFINDEX, ASN_INTEGER, RONLY, var_tunnelConfigEntry, 3, {2, 1, 5}}, |
| #define ROWSTATUS 8 |
| {ROWSTATUS, ASN_INTEGER, RWRITE, var_tunnelConfigEntry, 3, {2, 1, 6}}, |
| }; |
| |
| |
| |
| extern int register_sysORTable(oid *, size_t, const char *); |
| extern int unregister_sysORTable(oid *, size_t); |
| |
| static oid sysORTable_reg[] = { 1, 3, 6, 1, 2, 1, 10, 131 }; |
| static size_t sysORTable_reglen = 8; |
| |
| static struct tunnel *tunnels; |
| |
| |
| |
| void |
| deinit_tunnel(void) |
| { |
| unregister_sysORTable(sysORTable_reg, sysORTable_reglen); |
| } |
| |
| |
| |
| int |
| term_tunnel(int majorID, int minorID, void *serverarg, void *clientarg) |
| { |
| deinit_tunnel(); |
| return 0; |
| } |
| |
| |
| |
| void |
| init_tunnel(void) |
| { |
| register_sysORTable(sysORTable_reg, sysORTable_reglen, |
| "RFC 2667 TUNNEL-MIB implementation for " |
| "Linux 2.2.x kernels."); |
| |
| /* |
| * register ourselves with the agent to handle our mib tree |
| */ |
| REGISTER_MIB("tunnel", tunnel_variables, variable4, |
| tunnel_variables_oid); |
| |
| snmp_register_callback(SNMP_CALLBACK_LIBRARY, |
| SNMP_CALLBACK_SHUTDOWN, term_tunnel, NULL); |
| |
| tunnels = NULL; |
| } |
| |
| |
| |
| static int |
| getType(int index) |
| { |
| #ifndef USING_IF_MIB_IFTABLE_IFTABLE_MODULE |
| oid name[MAX_OID_LEN] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 3 }; |
| size_t length = 10; |
| struct variable ifType_variable = |
| { 3, ASN_INTEGER, RONLY, var_ifEntry, 10, |
| {1, 3, 6, 1, 2, 1, 2, 2, 1, 3} |
| }; |
| unsigned char *p; |
| size_t var_len; |
| WriteMethod *write_method; |
| |
| name[length] = index; |
| length++; |
| |
| p = var_ifEntry(&ifType_variable, |
| name, &length, |
| 1 /* exact */ , &var_len, &write_method); |
| if (!p) |
| return 0; |
| |
| return *(int *) p; |
| #else |
| ifTable_mib_index imi; |
| ifTable_rowreq_ctx *rr; |
| |
| imi.ifIndex = index; |
| rr = ifTable_row_find_by_mib_index(&imi); |
| if (NULL == rr) |
| return 0; |
| |
| return rr->data.ifType; |
| #endif |
| } |
| |
| |
| |
| static char * |
| getName(int index) |
| { |
| #ifndef USING_IF_MIB_IFTABLE_IFTABLE_MODULE |
| oid name[MAX_OID_LEN] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 2 }; |
| size_t length = 10; |
| struct variable ifName_variable = |
| { 2, ASN_INTEGER, RONLY, var_ifEntry, 10, |
| {1, 3, 6, 1, 2, 1, 2, 2, 1, 2} |
| }; |
| unsigned char *p; |
| size_t var_len; |
| WriteMethod *write_method; |
| |
| name[length] = index; |
| length++; |
| |
| p = var_ifEntry(&ifName_variable, |
| name, &length, |
| 1 /* exact */ , &var_len, &write_method); |
| if (!p) |
| return NULL; |
| |
| return p; |
| #else |
| return netsnmp_access_interface_name_find(index); |
| #endif |
| } |
| |
| |
| |
| static struct ip_tunnel_parm * |
| getTunnelParm(char *ifname) |
| { |
| struct ifreq ifrq; |
| int fd; |
| static struct ip_tunnel_parm parm; |
| |
| if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| return NULL; |
| } |
| |
| memset(&parm, 0, sizeof(struct ip_tunnel_parm)); |
| strcpy(ifrq.ifr_name, ifname); |
| ifrq.ifr_ifru.ifru_data = (void *) &parm; |
| if (ioctl(fd, SIOCGETTUNNEL, &ifrq) < 0) { |
| /* |
| * try again with the last char of the device name cut off. |
| * it might have been a zero digit appended by the agent. |
| */ |
| ifrq.ifr_name[strlen(ifrq.ifr_name) - 1] = 0; |
| if (ioctl(fd, SIOCGETTUNNEL, &ifrq) < 0) { |
| close(fd); |
| return NULL; |
| } |
| ifname[strlen(ifname) - 1] = 0; |
| } |
| |
| close(fd); |
| |
| return &parm; |
| } |
| |
| |
| |
| int |
| setTunnelParm(char *ifname, struct ip_tunnel_parm *parm) |
| { |
| struct ifreq ifrq; |
| int fd; |
| int err; |
| |
| if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| return -1; |
| } |
| |
| strcpy(ifrq.ifr_name, ifname); |
| ifrq.ifr_ifru.ifru_data = (void *) parm; |
| err = ioctl(fd, SIOCCHGTUNNEL, &ifrq); |
| close(fd); |
| |
| return err; |
| } |
| |
| |
| |
| /* |
| * update a struct tunnel. its index and ifname elements have to be set. |
| */ |
| static struct tunnel * |
| updateTunnel(struct tunnel *tunnel) |
| { |
| struct ip_tunnel_parm *parm; |
| int fd; |
| struct ifreq ifrq; |
| |
| /* |
| * NOTE: getTunnelParm() may adjust the passed ifname. |
| */ |
| parm = getTunnelParm(tunnel->ifname); |
| if (!parm) { |
| DEBUGMSGTL(("tunnel", |
| "updateTunnel(): getTunnelParm(\"%s\") returned NULL\n", |
| tunnel->ifname)); |
| tunnel->active = 0; |
| return NULL; |
| } |
| |
| tunnel->active = 1; |
| |
| tunnel->local = parm->iph.saddr; |
| tunnel->remote = parm->iph.daddr; |
| |
| if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| DEBUGMSGTL(("snmpd", "socket open failure in updateTunnels()\n")); |
| return NULL; |
| } else { |
| /* |
| * NOTE: this ioctl does not guarantee 6 bytes of a physaddr. |
| * In particular, a 'sit0' interface only appears to get back |
| * 4 bytes of sa_data. We don't use sa_data here, or we'd |
| * need to memset it to 0 before the ioct. |
| */ |
| strcpy(ifrq.ifr_name, tunnel->ifname); |
| if (ioctl(fd, SIOCGIFHWADDR, &ifrq) == 0) |
| switch (ifrq.ifr_hwaddr.sa_family) { |
| case ARPHRD_TUNNEL: |
| tunnel->encaps = 2; |
| break;; /* direct */ |
| case ARPHRD_TUNNEL6: |
| tunnel->encaps = 2; |
| break;; /* direct */ |
| case ARPHRD_IPGRE: |
| tunnel->encaps = 3; |
| break;; /* gre */ |
| case ARPHRD_SIT: |
| tunnel->encaps = 2; |
| break;; /* direct */ |
| default: |
| tunnel->encaps = 1; /* other */ |
| } |
| close(fd); |
| } |
| |
| tunnel->hoplimit = parm->iph.ttl; |
| tunnel->security = 1; |
| tunnel->tos = (parm->iph.tos & 1) ? -1 : parm->iph.tos; |
| /* |
| * XXX: adjust tos mapping (kernel <-> TUNNEL-MIB::tunnelIfTOS) |
| */ |
| |
| return tunnel; |
| } |
| |
| |
| |
| static void |
| updateTunnels(void) |
| { |
| static int max_index = 1; |
| static struct tunnel *last_tunnel = NULL; |
| struct tunnel *tunnel; |
| char *ifname; |
| int type; |
| |
| /* |
| * uptime the tunnels we have so far |
| */ |
| for (tunnel = tunnels; tunnel; tunnel = tunnel->next) { |
| DEBUGMSG(("tunnel", |
| "updateTunnels(): updating %s (index=%lu)\n", |
| tunnel->ifname, tunnel->ifindex)); |
| updateTunnel(tunnel); |
| } |
| |
| /* |
| * look for new tunnels |
| */ |
| for (; max_index < 256; max_index++) { |
| DEBUGMSG(("tunnel", |
| "updateTunnels(): looking for new index=%d\n", |
| max_index)); |
| type = getType(max_index); |
| if (type == 131) { |
| tunnel = (struct tunnel *) malloc(sizeof(struct tunnel)); |
| if (!tunnel) |
| continue; |
| |
| tunnel->ifindex = max_index; |
| tunnel->id = 1; |
| |
| ifname = getName(max_index); |
| if (!ifname) { |
| free(tunnel); |
| continue; |
| } |
| |
| tunnel->ifname = strdup(ifname); |
| if (!tunnel->ifname) { |
| free(tunnel); |
| continue; |
| } |
| |
| if (!updateTunnel(tunnel)) { |
| free(tunnel); |
| continue; |
| } |
| |
| if (last_tunnel) |
| last_tunnel->next = tunnel; |
| if (!tunnels) |
| tunnels = last_tunnel = tunnel; |
| tunnel->next = NULL; |
| last_tunnel = tunnel; |
| |
| DEBUGMSG(("tunnel", |
| "updateTunnels(): added %s (index=%lu state=%d)\n", |
| tunnel->ifname, tunnel->ifindex, tunnel->active)); |
| } |
| if (type == 0) |
| break; |
| } |
| } |
| |
| |
| |
| static struct tunnel * |
| getTunnelByIfIndex(int index) |
| { |
| struct tunnel *tunnel; |
| |
| DEBUGMSG(("tunnel", "getTunnelByIfIndex(%d): ", index)); |
| |
| for (tunnel = tunnels; tunnel; tunnel = tunnel->next) { |
| if (tunnel->ifindex == index) { |
| if (!tunnel->active) |
| break; |
| DEBUGMSG(("tunnel", |
| "%s (index=%lu)\n", tunnel->ifname, tunnel->ifindex)); |
| return tunnel; |
| } |
| } |
| DEBUGMSG(("tunnel", "NONE\n")); |
| return NULL; |
| } |
| |
| |
| |
| static struct tunnel * |
| getNextTunnelByIfIndex(int index) |
| { |
| struct tunnel *tunnel; |
| |
| DEBUGMSG(("tunnel", "getNextTunnelByIfIndex(%d): ", index)); |
| |
| for (tunnel = tunnels; tunnel; tunnel = tunnel->next) { |
| if (tunnel->ifindex > index) { |
| if (!tunnel->active) |
| continue; |
| DEBUGMSG(("tunnel", |
| "%s (index=%lu)\n", tunnel->ifname, tunnel->ifindex)); |
| return tunnel; |
| } |
| } |
| DEBUGMSG(("tunnel", "NONE\n")); |
| return NULL; |
| } |
| |
| |
| |
| static void |
| fillConfigOid(oid * name, struct tunnel *tunnel) |
| { |
| name[0] = ((unsigned char *) &tunnel->local)[0]; |
| name[1] = ((unsigned char *) &tunnel->local)[1]; |
| name[2] = ((unsigned char *) &tunnel->local)[2]; |
| name[3] = ((unsigned char *) &tunnel->local)[3]; |
| name[4] = ((unsigned char *) &tunnel->remote)[0]; |
| name[5] = ((unsigned char *) &tunnel->remote)[1]; |
| name[6] = ((unsigned char *) &tunnel->remote)[2]; |
| name[7] = ((unsigned char *) &tunnel->remote)[3]; |
| name[8] = tunnel->encaps; |
| name[9] = tunnel->id; |
| DEBUGMSGOID(("tunnel", name, 10)); |
| } |
| |
| |
| |
| static struct tunnel * |
| getTunnelByConfigOid(oid * name, size_t * length) |
| { |
| struct tunnel *tunnel; |
| oid tname[4 + 4 + 1 + 1]; |
| |
| DEBUGMSG(("tunnel", "getTunnelByConfigOid(): ")); |
| |
| for (tunnel = tunnels; tunnel; tunnel = tunnel->next) { |
| fillConfigOid(tname, tunnel); |
| if (!snmp_oid_compare(tname, 4 + 4 + 1 + 1, |
| &name[tunnel_len + 3], |
| (*length) - tunnel_len - 3)) { |
| if (!tunnel->active) |
| break; |
| DEBUGMSG(("tunnel", |
| "%s (index=%lu)\n", tunnel->ifname, tunnel->ifindex)); |
| return tunnel; |
| } |
| } |
| DEBUGMSG(("tunnel", "NONE\n")); |
| return NULL; |
| } |
| |
| |
| |
| static struct tunnel * |
| getNextTunnelByConfigOid(oid * name, size_t * length) |
| { |
| struct tunnel *tunnel, *last_tunnel; |
| oid tname[10], last_tname[10]; |
| |
| DEBUGMSG(("tunnel", "getNextTunnelByConfigOid(")); |
| DEBUGMSGOID(("tunnel", name, *length)); |
| DEBUGMSG(("tunnel", "): ")); |
| |
| last_tunnel = NULL; |
| for (tunnel = tunnels; tunnel; tunnel = tunnel->next) { |
| if (!tunnel->active) |
| continue; |
| fillConfigOid(tname, tunnel); |
| if (snmp_oid_compare(tname, 10, |
| &name[tunnel_len + 3], |
| (*length) - tunnel_len - 3) > 0) { |
| if (!last_tunnel) { |
| last_tunnel = tunnel; |
| memcpy((char *) last_tname, (char *) tname, |
| 10 * sizeof(oid)); |
| } else { |
| if (snmp_oid_compare(tname, 10, last_tname, 10) < 0) { |
| last_tunnel = tunnel; |
| memcpy((char *) last_tname, (char *) tname, |
| 10 * sizeof(oid)); |
| } |
| } |
| } |
| } |
| |
| if (last_tunnel) { |
| DEBUGMSG(("tunnel", |
| "%s (index=%lu)\n", |
| last_tunnel->ifname, last_tunnel->ifindex)); |
| } else { |
| DEBUGMSG(("tunnel", "NONE\n")); |
| } |
| |
| return last_tunnel; |
| } |
| |
| |
| |
| static int |
| writeLocalAddress(int action, unsigned char *var_val, |
| unsigned char var_val_type, size_t var_val_len, |
| unsigned char *statP, oid * name, size_t name_len) |
| { |
| static struct tunnel *tunnel; |
| struct ip_tunnel_parm *parm; |
| |
| switch (action) { |
| case RESERVE1: |
| if (var_val_type != ASN_IPADDRESS) { |
| return SNMP_ERR_WRONGTYPE; |
| } |
| if (var_val_len != 4) { |
| return SNMP_ERR_WRONGLENGTH; |
| } |
| case RESERVE2: |
| tunnel = getTunnelByIfIndex((int) name[name_len - 1]); |
| if (!tunnel) { |
| return SNMP_ERR_NOSUCHNAME; |
| } |
| case FREE: |
| break; |
| case ACTION: |
| break; |
| case UNDO: |
| break; |
| case COMMIT: |
| if (!tunnel) { |
| return SNMP_ERR_NOSUCHNAME; |
| } |
| parm = getTunnelParm(tunnel->ifname); |
| if (!parm) { |
| return SNMP_ERR_NOSUCHNAME; |
| } |
| parm->iph.saddr = *(unsigned long *) var_val; |
| setTunnelParm(tunnel->ifname, parm); |
| break; |
| } |
| |
| return SNMP_ERR_NOERROR; |
| } |
| |
| |
| |
| static int |
| writeRemoteAddress(int action, unsigned char *var_val, |
| unsigned char var_val_type, size_t var_val_len, |
| unsigned char *statP, oid * name, size_t name_len) |
| { |
| static struct tunnel *tunnel; |
| struct ip_tunnel_parm *parm; |
| |
| switch (action) { |
| case RESERVE1: |
| if (var_val_type != ASN_IPADDRESS) { |
| return SNMP_ERR_WRONGTYPE; |
| } |
| if (var_val_len != 4) { |
| return SNMP_ERR_WRONGLENGTH; |
| } |
| case RESERVE2: |
| tunnel = getTunnelByIfIndex((int) name[name_len - 1]); |
| if (!tunnel) { |
| return SNMP_ERR_NOSUCHNAME; |
| } |
| case FREE: |
| break; |
| case ACTION: |
| break; |
| case UNDO: |
| break; |
| case COMMIT: |
| if (!tunnel) { |
| return SNMP_ERR_NOSUCHNAME; |
| } |
| parm = getTunnelParm(tunnel->ifname); |
| if (!parm) { |
| return SNMP_ERR_NOSUCHNAME; |
| } |
| parm->iph.daddr = *(unsigned long *) var_val; |
| setTunnelParm(tunnel->ifname, parm); |
| break; |
| } |
| |
| return SNMP_ERR_NOERROR; |
| } |
| |
| |
| |
| static int |
| writeHopLimit(int action, unsigned char *var_val, |
| unsigned char var_val_type, size_t var_val_len, |
| unsigned char *statP, oid * name, size_t name_len) |
| { |
| static struct tunnel *tunnel; |
| struct ip_tunnel_parm *parm; |
| |
| switch (action) { |
| case RESERVE1: |
| if (var_val_type != ASN_INTEGER) { |
| return SNMP_ERR_WRONGTYPE; |
| } |
| if (var_val_len > sizeof(long)) { |
| return SNMP_ERR_WRONGLENGTH; |
| } |
| case RESERVE2: |
| tunnel = getTunnelByIfIndex((int) name[name_len - 1]); |
| if (!tunnel) { |
| return SNMP_ERR_NOSUCHNAME; |
| } |
| case FREE: |
| break; |
| case ACTION: |
| break; |
| case UNDO: |
| break; |
| case COMMIT: |
| if (!tunnel) { |
| return SNMP_ERR_NOSUCHNAME; |
| } |
| parm = getTunnelParm(tunnel->ifname); |
| if (!parm) { |
| return SNMP_ERR_NOSUCHNAME; |
| } |
| parm->iph.ttl = *(long *) var_val; |
| setTunnelParm(tunnel->ifname, parm); |
| break; |
| } |
| |
| return SNMP_ERR_NOERROR; |
| } |
| |
| |
| |
| static int |
| writeTOS(int action, unsigned char *var_val, |
| unsigned char var_val_type, size_t var_val_len, |
| unsigned char *statP, oid * name, size_t name_len) |
| { |
| static struct tunnel *tunnel; |
| struct ip_tunnel_parm *parm; |
| |
| switch (action) { |
| case RESERVE1: |
| if (var_val_type != ASN_INTEGER) { |
| return SNMP_ERR_WRONGTYPE; |
| } |
| if (var_val_len > sizeof(long)) { |
| return SNMP_ERR_WRONGLENGTH; |
| } |
| case RESERVE2: |
| tunnel = getTunnelByIfIndex((int) name[name_len - 1]); |
| if (!tunnel) { |
| return SNMP_ERR_NOSUCHNAME; |
| } |
| case FREE: |
| break; |
| case ACTION: |
| break; |
| case UNDO: |
| break; |
| case COMMIT: |
| if (!tunnel) { |
| return SNMP_ERR_NOSUCHNAME; |
| } |
| parm = getTunnelParm(tunnel->ifname); |
| if (!parm) { |
| return SNMP_ERR_NOSUCHNAME; |
| } |
| /* |
| * this does not cover all meaningful values: |
| */ |
| parm->iph.tos = (*(long *) var_val == -1) ? 1 : *(long *) var_val; |
| setTunnelParm(tunnel->ifname, parm); |
| break; |
| } |
| |
| return SNMP_ERR_NOERROR; |
| } |
| |
| |
| |
| unsigned char * |
| var_tunnelIfEntry(struct variable *vp, |
| oid * name, size_t * length, |
| int exact, size_t * var_len, WriteMethod ** write_method) |
| { |
| static unsigned long ret_addr; |
| static long ret_int; |
| struct tunnel *tunnel; |
| |
| DEBUGMSGTL(("tunnel", "var_tunnelIfEntry: ")); |
| DEBUGMSGOID(("tunnel", name, *length)); |
| DEBUGMSG(("tunnel", " %d\n", exact)); |
| |
| updateTunnels(); |
| |
| if (exact) { |
| if (*length != tunnel_len + 3 + 1) { |
| return NULL; |
| } |
| tunnel = getTunnelByIfIndex((int) name[*length - 1]); |
| } else { |
| if ((*length) < tunnel_len) { |
| memcpy((char *) name, (char *) tunnel_variables_oid, |
| tunnel_len * sizeof(oid)); |
| } |
| if ((*length) < tunnel_len + 1) { |
| name[tunnel_len] = 1; |
| } |
| if ((*length) < tunnel_len + 2) { |
| name[tunnel_len + 1] = 1; |
| } |
| if ((*length) < tunnel_len + 3) { |
| name[tunnel_len + 2] = 1; |
| } |
| if ((*length) < tunnel_len + 4) { |
| name[tunnel_len + 3] = 0; |
| } |
| *length = tunnel_len + 4; |
| |
| tunnel = getNextTunnelByIfIndex(name[*length - 1]); |
| if (!tunnel) { |
| /* |
| * end of column, continue with first row of next column |
| */ |
| tunnel = tunnels; |
| name[tunnel_len + 2]++; |
| if (name[tunnel_len + 2] > 6) { |
| /* |
| * there is no next column |
| */ |
| return NULL; |
| } |
| if (!tunnel) { |
| /* |
| * there is no (next) row |
| */ |
| return NULL; |
| } |
| } |
| } |
| |
| if (!tunnel) { |
| return NULL; |
| } |
| |
| name[*length - 1] = tunnel->ifindex; |
| |
| DEBUGMSGTL(("tunnel", "var_tunnelIfEntry: using")); |
| DEBUGMSGOID(("tunnel", name, *length)); |
| DEBUGMSG(("tunnel", "\n")); |
| |
| switch (name[tunnel_len + 2]) { |
| case 1: /* tunnelIfLocalAddress */ |
| ret_addr = tunnel->local; |
| *var_len = 4; |
| vp->type = ASN_IPADDRESS; |
| *write_method = writeLocalAddress; |
| return (u_char *) & ret_addr; |
| case 2: /* tunnelIfRemoteAddress */ |
| ret_addr = tunnel->remote; |
| *var_len = 4; |
| vp->type = ASN_IPADDRESS; |
| *write_method = writeRemoteAddress; |
| return (u_char *) & ret_addr; |
| case 3: /* tunnelIfEncapsMethod */ |
| ret_int = tunnel->encaps; |
| *var_len = sizeof(ret_int); |
| vp->type = ASN_INTEGER; |
| return (u_char *) & ret_int; |
| case 4: /* tunnelIfHopLimit */ |
| ret_int = tunnel->hoplimit; |
| *var_len = sizeof(ret_int); |
| vp->type = ASN_INTEGER; |
| *write_method = writeHopLimit; |
| return (u_char *) & ret_int; |
| case 5: /* tunnelIfSecurity */ |
| ret_int = tunnel->security; |
| *var_len = sizeof(ret_int); |
| vp->type = ASN_INTEGER; |
| return (u_char *) & ret_int; |
| case 6: /* tunnelIfTOS */ |
| ret_int = tunnel->tos; |
| *var_len = sizeof(ret_int); |
| vp->type = ASN_INTEGER; |
| *write_method = writeTOS; |
| return (u_char *) & ret_int; |
| default: |
| return 0; |
| } |
| |
| return NULL; |
| } |
| |
| |
| |
| unsigned char * |
| var_tunnelConfigEntry(struct variable *vp, |
| oid * name, size_t * length, |
| int exact, size_t * var_len, |
| WriteMethod ** write_method) |
| { |
| static long ret_int; |
| struct tunnel *tunnel; |
| int i; |
| |
| DEBUGMSGTL(("tunnel", "var_tunnelConfigEntry: ")); |
| DEBUGMSGOID(("tunnel", name, *length)); |
| DEBUGMSG(("tunnel", " %d\n", exact)); |
| |
| updateTunnels(); |
| |
| if (exact) { |
| if (*length != tunnel_len + 3 + 4 + 4 + 1 + 1) { |
| return NULL; |
| } |
| tunnel = getTunnelByConfigOid(name, length); |
| } else { |
| if (snmp_oid_compare(name, *length, |
| tunnel_configEntry_oid, |
| tunnel_configEntry_len) < 0) { |
| *length = 0; |
| } |
| if ((*length) < tunnel_len) { |
| memcpy((char *) name, (char *) tunnel_variables_oid, |
| tunnel_len * sizeof(oid)); |
| } |
| if ((*length) < tunnel_len + 1) { |
| name[tunnel_len] = 2; |
| } |
| if ((*length) < tunnel_len + 2) { |
| name[tunnel_len + 1] = 1; |
| } |
| if ((*length) < tunnel_len + 3) { |
| name[tunnel_len + 2] = 5; |
| } |
| for (i = MAX(*length, tunnel_len + 3); |
| i < tunnel_len + 3 + 4 + 4 + 1 + 1; i++) { |
| name[i] = 0; |
| } |
| *length = tunnel_len + 3 + 4 + 4 + 1 + 1; |
| tunnel = getNextTunnelByConfigOid(name, length); |
| if (!tunnel) { |
| /* |
| * end of column, continue with first row of next column |
| */ |
| tunnel = tunnels; |
| name[tunnel_len + 2]++; |
| if (name[tunnel_len + 2] > 6) { |
| /* |
| * there is no next column |
| */ |
| return NULL; |
| } |
| if (!tunnel) { |
| /* |
| * there is no (next) row |
| */ |
| return NULL; |
| } |
| } |
| } |
| |
| if (!tunnel) { |
| return NULL; |
| } |
| |
| fillConfigOid(&name[tunnel_len + 3], tunnel); |
| |
| DEBUGMSGTL(("tunnel", "var_tunnelConfigEntry: using ")); |
| DEBUGMSGOID(("tunnel", name, *length)); |
| DEBUGMSG(("tunnel", "\n")); |
| |
| switch (name[tunnel_len + 2]) { |
| case 5: /* tunnelConfigIfIndex */ |
| ret_int = tunnel->ifindex; |
| *var_len = sizeof(ret_int); |
| vp->type = ASN_INTEGER; |
| return (u_char *) & ret_int; |
| case 6: /* tunnelConfigStatus */ |
| ret_int = 1; /* active */ |
| *var_len = sizeof(ret_int); |
| vp->type = ASN_INTEGER; |
| return (u_char *) & ret_int; |
| default: |
| return 0; |
| } |
| |
| return NULL; |
| } |
