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Diffstat (limited to 'snmplib/transports/snmpAAL5PVCDomain.c')
-rw-r--r--snmplib/transports/snmpAAL5PVCDomain.c374
1 files changed, 374 insertions, 0 deletions
diff --git a/snmplib/transports/snmpAAL5PVCDomain.c b/snmplib/transports/snmpAAL5PVCDomain.c
new file mode 100644
index 0000000..5ac69a1
--- /dev/null
+++ b/snmplib/transports/snmpAAL5PVCDomain.c
@@ -0,0 +1,374 @@
+#include <net-snmp/net-snmp-config.h>
+
+#include <net-snmp/library/snmpAAL5PVCDomain.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/tools.h>
+
+
+oid netsnmp_AAL5PVCDomain[10] = { NETSNMP_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 = recvfrom(t->sock, buf, size, 0, NULL, NULL);
+ if (rc < 0 && errno != EINTR) {
+ break;
+ }
+ }
+
+ if (rc >= 0) {
+ DEBUGIF("netsnmp_aal5pvc") {
+ 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) {
+ DEBUGIF("netsnmp_aal5pvc") {
+ char *str = netsnmp_aal5pvc_fmtaddr(NULL, (void *)to,
+ sizeof(struct sockaddr_atmpvc));
+ DEBUGMSGTL(("netsnmp_aal5pvc",
+ "send %d bytes from %p to %s on fd %d\n",
+ size, buf, str, t->sock));
+ free(str);
+ }
+ while (rc < 0) {
+ rc = sendto(t->sock, buf, size, 0, NULL, 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 %d\n", 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)
+{
+ netsnmp_transport *t = NULL;
+
+#ifdef NETSNMP_NO_LISTEN_SUPPORT
+ if (local)
+ return NULL;
+#endif /* NETSNMP_NO_LISTEN_SUPPORT */
+
+ if (addr == NULL || addr->sap_family != AF_ATMPVC) {
+ return NULL;
+ }
+
+ t = SNMP_MALLOC_TYPEDEF(netsnmp_transport);
+ if (t == NULL) {
+ return NULL;
+ }
+
+ DEBUGIF("netsnmp_aal5pvc") {
+ char *str = netsnmp_aal5pvc_fmtaddr(NULL, (void *) addr,
+ sizeof(struct sockaddr_atmpvc));
+ DEBUGMSGTL(("netsnmp_aal5pvc", "open %s %s\n",
+ local ? "local" : "remote", str));
+ free(str);
+ }
+
+ 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 opened\n", t->sock));
+
+ {
+ /*
+ * Set up the QOS parameters.
+ */
+
+ struct atm_qos qos = { 0 };
+ 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) {
+#ifndef NETSNMP_NO_LISTEN_SUPPORT
+ t->local = (unsigned char*)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 /* NETSNMP_NO_LISTEN_SUPPORT */
+ return NULL;
+#endif /* NETSNMP_NO_LISTEN_SUPPORT */
+ } else {
+ t->remote = (unsigned char*)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,
+ const char *default_target)
+{
+ struct sockaddr_atmpvc addr;
+
+ if (str == NULL || *str == '\0')
+ str = default_target;
+
+ 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 = (const char**)calloc(3, sizeof(char *));
+ aal5pvcDomain.prefix[0] = "aal5pvc";
+ aal5pvcDomain.prefix[1] = "pvc";
+
+ aal5pvcDomain.f_create_from_tstring = NULL;
+ aal5pvcDomain.f_create_from_tstring_new = netsnmp_aal5pvc_create_tstring;
+ aal5pvcDomain.f_create_from_ostring = netsnmp_aal5pvc_create_ostring;
+
+ netsnmp_tdomain_register(&aal5pvcDomain);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-21 16:31:49 +0000