snmpAAL5PVCDomain.c
上传用户:wxp200602
上传日期:2007-10-30
资源大小:4028k
文件大小:10k
- #include <net-snmp/net-snmp-config.h>
- #include <stdio.h>
- #include <sys/types.h>
- #include <ctype.h>
- #include <errno.h>
- #if HAVE_STRING_H
- #include <string.h>
- #else
- #include <strings.h>
- #endif
- #if HAVE_STDLIB_H
- #include <stdlib.h>
- #endif
- #if HAVE_UNISTD_H
- #include <unistd.h>
- #endif
- #if HAVE_SYS_SOCKET_H
- #include <sys/socket.h>
- #endif
- #include <atm.h>
- #if HAVE_DMALLOC_H
- #include <dmalloc.h>
- #endif
- #include <net-snmp/types.h>
- #include <net-snmp/output_api.h>
- #include <net-snmp/config_api.h>
- #include <net-snmp/library/snmp_transport.h>
- #include <net-snmp/library/snmpAAL5PVCDomain.h>
- oid netsnmp_AAL5PVCDomain[10] = { ENTERPRISE_MIB, 3, 3, 3 };
- static netsnmp_tdomain aal5pvcDomain;
- /*
- * Return a string representing the address in data, or else the "far end"
- * address if data is NULL.
- */
- static char *
- netsnmp_aal5pvc_fmtaddr(netsnmp_transport *t, void *data, int len)
- {
- struct sockaddr_atmpvc *to = NULL;
- if (data != NULL && len == sizeof(struct sockaddr_atmpvc)) {
- to = (struct sockaddr_atmpvc *) data;
- } else if (t != NULL && t->data != NULL &&
- t->data_length == sizeof(struct sockaddr_atmpvc)) {
- to = (struct sockaddr_atmpvc *) t->data;
- }
- if (to == NULL) {
- return strdup("AAL5 PVC: unknown");
- } else {
- char tmp[64];
- sprintf(tmp, "AAL5 PVC: %hd.%hd.%d", to->sap_addr.itf,
- to->sap_addr.vpi, to->sap_addr.vci);
- return strdup(tmp);
- }
- }
- /*
- * You can write something into opaque that will subsequently get passed back
- * to your send function if you like. For instance, you might want to
- * remember where a PDU came from, so that you can send a reply there...
- */
- static int
- netsnmp_aal5pvc_recv(netsnmp_transport *t, void *buf, int size,
- void **opaque, int *olength)
- {
- int rc = -1;
- if (t != NULL && t->sock >= 0) {
- while (rc < 0) {
- rc = recv(t->sock, buf, size, 0);
- if (rc < 0 && errno != EINTR) {
- break;
- }
- }
- if (rc >= 0) {
- char *str = netsnmp_aal5pvc_fmtaddr(t, NULL, 0);
- DEBUGMSGTL(("netsnmp_aal5pvc",
- "recv on fd %d got %d bytes (from %s)n", t->sock,
- rc, str));
- free(str);
- } else {
- DEBUGMSGTL(("netsnmp_aal5pvc", "recv on fd %d err %d ("%s")n",
- t->sock, errno, strerror(errno)));
- }
- *opaque = NULL;
- *olength = 0;
- }
- return rc;
- }
- static int
- netsnmp_aal5pvc_send(netsnmp_transport *t, void *buf, int size,
- void **opaque, int *olength)
- {
- int rc = -1;
- struct sockaddr *to = NULL;
- if (opaque != NULL && *opaque != NULL &&
- *olength == sizeof(struct sockaddr_atmpvc)) {
- to = (struct sockaddr *) (*opaque);
- } else if (t != NULL && t->data != NULL &&
- t->data_length == sizeof(struct sockaddr_atmpvc)) {
- to = (struct sockaddr *) (t->data);
- }
- if (to != NULL && t != NULL && t->sock >= 0) {
- char *str = netsnmp_aal5pvc_fmtaddr(NULL, (void *)to,
- sizeof(struct sockaddr_atmpvc));
- DEBUGMSGTL(("netsnmp_aal5pvc","send %d bytes from %p to %s on fd %dn",
- size, buf, str, t->sock));
- free(str);
- while (rc < 0) {
- rc = send(t->sock, buf, size, 0);
- if (rc < 0 && errno != EINTR) {
- break;
- }
- }
- }
- return rc;
- }
- static int
- netsnmp_aal5pvc_close(netsnmp_transport *t)
- {
- int rc = -1;
- if (t->sock >= 0) {
- DEBUGMSGTL(("netsnmp_aal5pvc", "close fd %dn", t->sock));
- #ifndef HAVE_CLOSESOCKET
- rc = close(t->sock);
- #else
- rc = closesocket(t->sock);
- #endif
- t->sock = -1;
- }
- return rc;
- }
- /*
- * Open an AAL5 PVC transport for SNMP. Local is TRUE if addr is the local
- * NSAP to bind to (i.e. this is a server-type session); otherwise addr is
- * the remote NSAP to send things to.
- */
- netsnmp_transport *
- netsnmp_aal5pvc_transport(struct sockaddr_atmpvc *addr, int local)
- {
- char *str = NULL;
- struct atm_qos qos;
- netsnmp_transport *t = NULL;
- if (addr == NULL || addr->sap_family != AF_ATMPVC) {
- return NULL;
- }
- t = (netsnmp_transport *) malloc(sizeof(netsnmp_transport));
- if (t == NULL) {
- return NULL;
- }
- str = netsnmp_aal5pvc_fmtaddr(NULL, (void *) addr,
- sizeof(struct sockaddr_atmpvc));
- DEBUGMSGTL(("netsnmp_aal5pvc", "open %s %sn", local ? "local" : "remote",
- str));
- free(str);
- memset(t, 0, sizeof(netsnmp_transport));
- t->domain = netsnmp_AAL5PVCDomain;
- t->domain_length =
- sizeof(netsnmp_AAL5PVCDomain) / sizeof(netsnmp_AAL5PVCDomain[0]);
- t->sock = socket(PF_ATMPVC, SOCK_DGRAM, 0);
- if (t->sock < 0) {
- DEBUGMSGTL(("netsnmp_aal5pvc","socket failed (%s)n",strerror(errno)));
- netsnmp_transport_free(t);
- return NULL;
- }
- DEBUGMSGTL(("netsnmp_aal5pvc", "fd %d openedn", t->sock));
- /*
- * Set up the QOS parameters.
- */
- memset(&qos, 0, sizeof(struct atm_qos));
- qos.aal = ATM_AAL5;
- qos.rxtp.traffic_class = ATM_UBR;
- qos.rxtp.max_sdu = SNMP_MAX_LEN; /* Hmm -- this is a bit small? */
- qos.txtp = qos.rxtp;
- if (setsockopt(t->sock, SOL_ATM, SO_ATMQOS, &qos, sizeof(qos)) < 0) {
- DEBUGMSGTL(("netsnmp_aal5pvc", "setsockopt failed (%s)n",
- strerror(errno)));
- netsnmp_aal5pvc_close(t);
- netsnmp_transport_free(t);
- return NULL;
- }
- if (local) {
- t->local = malloc(8);
- if (t->local == NULL) {
- netsnmp_transport_free(t);
- return NULL;
- }
- t->local[0] = (addr->sap_addr.itf & 0xff00) >> 8;
- t->local[1] = (addr->sap_addr.itf & 0x00ff) >> 0;
- t->local[2] = (addr->sap_addr.vpi & 0xff00) >> 8;
- t->local[3] = (addr->sap_addr.vpi & 0x00ff) >> 0;
- t->local[4] = (addr->sap_addr.vci & 0xff000000) >> 24;
- t->local[5] = (addr->sap_addr.vci & 0x00ff0000) >> 16;
- t->local[6] = (addr->sap_addr.vci & 0x0000ff00) >> 8;
- t->local[7] = (addr->sap_addr.vci & 0x000000ff) >> 0;
- t->local_length = 8;
- if (bind(t->sock, (struct sockaddr *) addr,
- sizeof(struct sockaddr_atmpvc)) < 0) {
- DEBUGMSGTL(("netsnmp_aal5pvc", "bind failed (%s)n",
- strerror(errno)));
- netsnmp_aal5pvc_close(t);
- netsnmp_transport_free(t);
- return NULL;
- }
- } else {
- t->remote = malloc(8);
- if (t->remote == NULL) {
- netsnmp_transport_free(t);
- return NULL;
- }
- t->remote[0] = (addr->sap_addr.itf & 0xff00) >> 8;
- t->remote[1] = (addr->sap_addr.itf & 0x00ff) >> 0;
- t->remote[2] = (addr->sap_addr.vpi & 0xff00) >> 8;
- t->remote[3] = (addr->sap_addr.vpi & 0x00ff) >> 0;
- t->remote[4] = (addr->sap_addr.vci & 0xff000000) >> 24;
- t->remote[5] = (addr->sap_addr.vci & 0x00ff0000) >> 16;
- t->remote[6] = (addr->sap_addr.vci & 0x0000ff00) >> 8;
- t->remote[7] = (addr->sap_addr.vci & 0x000000ff) >> 0;
- t->remote_length = 8;
- if (connect(t->sock, (struct sockaddr *) addr,
- sizeof(struct sockaddr_atmpvc)) < 0) {
- DEBUGMSGTL(("netsnmp_aal5pvc", "connect failed (%s)n",
- strerror(errno)));
- netsnmp_aal5pvc_close(t);
- netsnmp_transport_free(t);
- return NULL;
- }
- }
- t->data = malloc(sizeof(struct sockaddr_atmpvc));
- if (t->data == NULL) {
- netsnmp_transport_free(t);
- return NULL;
- }
- memcpy(t->data, addr, sizeof(struct sockaddr_atmpvc));
- t->data_length = sizeof(struct sockaddr_atmpvc);
- /*
- * 16-bit length field in the trailer, no headers.
- */
- t->msgMaxSize = 0xffff;
- t->f_recv = netsnmp_aal5pvc_recv;
- t->f_send = netsnmp_aal5pvc_send;
- t->f_close = netsnmp_aal5pvc_close;
- t->f_accept = NULL;
- t->f_fmtaddr = netsnmp_aal5pvc_fmtaddr;
- return t;
- }
- netsnmp_transport *
- netsnmp_aal5pvc_create_tstring(const char *str, int local)
- {
- struct sockaddr_atmpvc addr;
- if (str != NULL) {
- addr.sap_family = AF_ATMPVC;
- if (sscanf(str, "%hd.%hd.%d", &(addr.sap_addr.itf),
- &(addr.sap_addr.vpi), &(addr.sap_addr.vci)) == 3) {
- return netsnmp_aal5pvc_transport(&addr, local);
- } else if (sscanf(str, "%hd.%d", &(addr.sap_addr.vpi),
- &(addr.sap_addr.vci)) == 2) {
- addr.sap_addr.itf = 0;
- return netsnmp_aal5pvc_transport(&addr, local);
- } else if (sscanf(str, "%d", &(addr.sap_addr.vci)) == 1) {
- addr.sap_addr.itf = 0;
- addr.sap_addr.vpi = 0;
- return netsnmp_aal5pvc_transport(&addr, local);
- } else {
- return NULL;
- }
- } else {
- return NULL;
- }
- }
- netsnmp_transport *
- netsnmp_aal5pvc_create_ostring(const u_char * o, size_t o_len, int local)
- {
- struct sockaddr_atmpvc addr;
- if (o_len == 8) {
- addr.sap_family = AF_ATMPVC;
- addr.sap_addr.itf = (o[0] << 8) + (o[1] << 0);
- addr.sap_addr.vpi = (o[2] << 8) + (o[3] << 0);
- addr.sap_addr.vci =
- (o[4] << 24) + (o[5] << 16) + (o[6] << 8) + (o[7] << 0);
- return netsnmp_aal5pvc_transport(&addr, local);
- }
- return NULL;
- }
- void
- netsnmp_aal5pvc_ctor(void)
- {
- aal5pvcDomain.name = netsnmp_AAL5PVCDomain;
- aal5pvcDomain.name_length = sizeof(netsnmp_AAL5PVCDomain) / sizeof(oid);
- aal5pvcDomain.prefix = calloc(3, sizeof(char *));
- aal5pvcDomain.prefix[0] = "aal5pvc";
- aal5pvcDomain.prefix[1] = "pvc";
- aal5pvcDomain.f_create_from_tstring = netsnmp_aal5pvc_create_tstring;
- aal5pvcDomain.f_create_from_ostring = netsnmp_aal5pvc_create_ostring;
- netsnmp_tdomain_register(&aal5pvcDomain);
- }