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-rw-r--r--snmplib/transports/snmpUDPIPv6Domain.c788
1 files changed, 788 insertions, 0 deletions
diff --git a/snmplib/transports/snmpUDPIPv6Domain.c b/snmplib/transports/snmpUDPIPv6Domain.c
new file mode 100644
index 0000000..b3eaae4
--- /dev/null
+++ b/snmplib/transports/snmpUDPIPv6Domain.c
@@ -0,0 +1,788 @@
+#include <net-snmp/net-snmp-config.h>
+
+#include <net-snmp/library/snmpUDPIPv6Domain.h>
+#include <net-snmp/library/system.h>
+
+#include <net-snmp/types.h>
+
+#ifdef NETSNMP_TRANSPORT_UDPIPV6_DOMAIN
+
+#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
+#include <stddef.h>
+#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
+
+#if defined(HAVE_WINSOCK_H) && !defined(mingw32)
+static const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
+#endif
+
+#if HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#if HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#if HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#if HAVE_NET_IF_H
+#include <net/if.h>
+#endif
+
+#if HAVE_DMALLOC_H
+#include <dmalloc.h>
+#endif
+
+#if HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
+#define SS_FAMILY ss_family
+#elif HAVE_STRUCT_SOCKADDR_STORAGE___SS_FAMILY
+#define SS_FAMILY __ss_family
+#endif
+
+#if defined(darwin)
+#include <stdint.h> /* for uint8_t */
+#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/snmpSocketBaseDomain.h>
+#include <net-snmp/library/tools.h>
+
+#include "inet_ntop.h"
+#include "inet_pton.h"
+
+oid netsnmp_UDPIPv6Domain[] = { TRANSPORT_DOMAIN_UDP_IPV6 };
+static netsnmp_tdomain udp6Domain;
+
+/*
+ * from snmpUDPDomain. not static, but not public, either.
+ * (ie don't put it in a public header.)
+ */
+extern void _netsnmp_udp_sockopt_set(int fd, int server);
+
+/*
+ * Return a string representing the address in data, or else the "far end"
+ * address if data is NULL.
+ */
+
+static char *
+netsnmp_udp6_fmtaddr(netsnmp_transport *t, void *data, int len)
+{
+ return netsnmp_ipv6_fmtaddr("UDP/IPv6", t, data, len);
+}
+
+
+
+/*
+ * 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_udp6_recv(netsnmp_transport *t, void *buf, int size,
+ void **opaque, int *olength)
+{
+ int rc = -1;
+ socklen_t fromlen = sizeof(struct sockaddr_in6);
+ struct sockaddr *from;
+
+ if (t != NULL && t->sock >= 0) {
+ from = (struct sockaddr *) malloc(sizeof(struct sockaddr_in6));
+ if (from == NULL) {
+ *opaque = NULL;
+ *olength = 0;
+ return -1;
+ } else {
+ memset(from, 0, fromlen);
+ }
+
+ while (rc < 0) {
+ rc = recvfrom(t->sock, buf, size, 0, from, &fromlen);
+ if (rc < 0 && errno != EINTR) {
+ break;
+ }
+ }
+
+ if (rc >= 0) {
+ DEBUGIF("netsnmp_udp6") {
+ char *str = netsnmp_udp6_fmtaddr(NULL, from, fromlen);
+ DEBUGMSGTL(("netsnmp_udp6",
+ "recvfrom fd %d got %d bytes (from %s)\n", t->sock,
+ rc, str));
+ free(str);
+ }
+ } else {
+ DEBUGMSGTL(("netsnmp_udp6", "recvfrom fd %d err %d (\"%s\")\n",
+ t->sock, errno, strerror(errno)));
+ }
+ *opaque = (void *) from;
+ *olength = sizeof(struct sockaddr_in6);
+ }
+ return rc;
+}
+
+
+
+static int
+netsnmp_udp6_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_in6)) {
+ to = (struct sockaddr *) (*opaque);
+ } else if (t != NULL && t->data != NULL &&
+ ((t->data_length == sizeof(struct sockaddr_in6)) ||
+ (t->data_length == sizeof(netsnmp_indexed_addr_pair)))) {
+ to = (struct sockaddr *) (t->data);
+ }
+
+ if (to != NULL && t != NULL && t->sock >= 0) {
+ DEBUGIF("netsnmp_udp6") {
+ char *str = netsnmp_udp6_fmtaddr(NULL, (void *)to,
+ sizeof(struct sockaddr_in6));
+ DEBUGMSGTL(("netsnmp_udp6",
+ "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, to,sizeof(struct sockaddr_in6));
+ if (rc < 0 && errno != EINTR) {
+ break;
+ }
+ }
+ }
+ return rc;
+}
+
+
+/*
+ * Open a UDP/IPv6-based transport for SNMP. Local is TRUE if addr is the
+ * local address to bind to (i.e. this is a server-type session); otherwise
+ * addr is the remote address to send things to.
+ */
+
+netsnmp_transport *
+netsnmp_udp6_transport(struct sockaddr_in6 *addr, int local)
+{
+ netsnmp_transport *t = NULL;
+ int rc = 0;
+
+#ifdef NETSNMP_NO_LISTEN_SUPPORT
+ if (local)
+ return NULL;
+#endif /* NETSNMP_NO_LISTEN_SUPPORT */
+
+ if (addr == NULL || addr->sin6_family != AF_INET6) {
+ return NULL;
+ }
+
+ t = SNMP_MALLOC_TYPEDEF(netsnmp_transport);
+ if (t == NULL) {
+ return NULL;
+ }
+
+ DEBUGIF("netsnmp_udp6") {
+ char *str = netsnmp_udp6_fmtaddr(NULL, (void *) addr,
+ sizeof(struct sockaddr_in6));
+ DEBUGMSGTL(("netsnmp_udp6", "open %s %s\n", local ? "local" : "remote",
+ str));
+ free(str);
+ }
+
+ t->domain = netsnmp_UDPIPv6Domain;
+ t->domain_length =
+ sizeof(netsnmp_UDPIPv6Domain) / sizeof(netsnmp_UDPIPv6Domain[0]);
+
+ t->sock = socket(PF_INET6, SOCK_DGRAM, 0);
+ if (t->sock < 0) {
+ netsnmp_transport_free(t);
+ return NULL;
+ }
+
+ _netsnmp_udp_sockopt_set(t->sock, local);
+
+ if (local) {
+#ifndef NETSNMP_NO_LISTEN_SUPPORT
+ /*
+ * This session is intended as a server, so we must bind on to the
+ * given IP address, which may include an interface address, or could
+ * be INADDR_ANY, but certainly includes a port number.
+ */
+
+#ifdef IPV6_V6ONLY
+ /* Try to restrict PF_INET6 socket to IPv6 communications only. */
+ {
+ int one=1;
+ if (setsockopt(t->sock, IPPROTO_IPV6, IPV6_V6ONLY, (char *)&one, sizeof(one)) != 0) {
+ DEBUGMSGTL(("netsnmp_udp6", "couldn't set IPV6_V6ONLY to %d bytes: %s\n", one, strerror(errno)));
+ }
+ }
+#endif
+
+ rc = bind(t->sock, (struct sockaddr *) addr,
+ sizeof(struct sockaddr_in6));
+ if (rc != 0) {
+ netsnmp_socketbase_close(t);
+ netsnmp_transport_free(t);
+ return NULL;
+ }
+ t->local = (unsigned char*)malloc(18);
+ if (t->local == NULL) {
+ netsnmp_socketbase_close(t);
+ netsnmp_transport_free(t);
+ return NULL;
+ }
+ memcpy(t->local, addr->sin6_addr.s6_addr, 16);
+ t->local[16] = (addr->sin6_port & 0xff00) >> 8;
+ t->local[17] = (addr->sin6_port & 0x00ff) >> 0;
+ t->local_length = 18;
+ t->data = NULL;
+ t->data_length = 0;
+#else /* NETSNMP_NO_LISTEN_SUPPORT */
+ return NULL;
+#endif /* NETSNMP_NO_LISTEN_SUPPORT */
+ } else {
+ /*
+ * This is a client session. Save the address in the
+ * transport-specific data pointer for later use by netsnmp_udp6_send.
+ */
+
+ t->data = malloc(sizeof(netsnmp_indexed_addr_pair));
+ if (t->data == NULL) {
+ netsnmp_socketbase_close(t);
+ netsnmp_transport_free(t);
+ return NULL;
+ }
+ memcpy(t->data, addr, sizeof(struct sockaddr_in6));
+ t->data_length = sizeof(netsnmp_indexed_addr_pair);
+ t->remote = (unsigned char*)malloc(18);
+ if (t->remote == NULL) {
+ netsnmp_socketbase_close(t);
+ netsnmp_transport_free(t);
+ return NULL;
+ }
+ memcpy(t->remote, addr->sin6_addr.s6_addr, 16);
+ t->remote[16] = (addr->sin6_port & 0xff00) >> 8;
+ t->remote[17] = (addr->sin6_port & 0x00ff) >> 0;
+ t->remote_length = 18;
+ }
+
+ /*
+ * 16-bit length field, 8 byte UDP header, 40 byte IPv6 header.
+ */
+
+ t->msgMaxSize = 0xffff - 8 - 40;
+ t->f_recv = netsnmp_udp6_recv;
+ t->f_send = netsnmp_udp6_send;
+ t->f_close = netsnmp_socketbase_close;
+ t->f_accept = NULL;
+ t->f_fmtaddr = netsnmp_udp6_fmtaddr;
+
+ return t;
+}
+
+
+#if !defined(NETSNMP_DISABLE_SNMPV1) || !defined(NETSNMP_DISABLE_SNMPV2C)
+/*
+ * The following functions provide the "com2sec6" configuration token
+ * functionality for compatibility.
+ */
+
+#define EXAMPLE_NETWORK "NETWORK"
+#define EXAMPLE_COMMUNITY "COMMUNITY"
+
+typedef struct com2Sec6Entry_s {
+ const char *secName;
+ const char *contextName;
+ struct com2Sec6Entry_s *next;
+ struct in6_addr network;
+ struct in6_addr mask;
+ const char community[1];
+} com2Sec6Entry;
+
+static com2Sec6Entry *com2Sec6List = NULL, *com2Sec6ListLast = NULL;
+
+
+NETSNMP_STATIC_INLINE int
+create_com2Sec6Entry(const struct addrinfo* const run,
+ const struct in6_addr* const mask,
+ const char* const secName,
+ const size_t secNameLen,
+ const char* const contextName,
+ const size_t contextNameLen,
+ const char* const community,
+ const size_t communityLen,
+ com2Sec6Entry** const begin,
+ com2Sec6Entry** const end)
+{
+ const struct sockaddr_in6 * const run_addr =
+ (const struct sockaddr_in6*)run->ai_addr;
+ int i;
+
+ /* Check that the network and mask are consistent. */
+ for (i = 0; i < 16; ++i) {
+ if (run_addr->sin6_addr.s6_addr[i] & ~mask->s6_addr[i]) {
+ config_perror("source/mask mismatch");
+ return 1;
+ }
+ }
+
+ {
+ char buf1[INET6_ADDRSTRLEN];
+ char buf2[INET6_ADDRSTRLEN];
+ DEBUGMSGTL(("netsnmp_udp6_parse_security",
+ "<\"%s\", %s/%s> => \"%s\"\n",
+ community,
+ inet_ntop(AF_INET6, &run_addr->sin6_addr,
+ buf1, sizeof(buf1)),
+ inet_ntop(AF_INET6, mask, buf2, sizeof(buf2)),
+ secName));
+ }
+
+ {
+ /* Allocate all the needed chunks */
+ void * const v =
+ malloc(offsetof(com2Sec6Entry, community) + communityLen +
+ secNameLen + contextNameLen);
+
+ com2Sec6Entry* const e = (com2Sec6Entry*)v;
+ char *last = ((char*)v) + offsetof(com2Sec6Entry, community);
+
+ if (v == NULL) {
+ config_perror("memory error");
+ return 1;
+ }
+
+ memcpy(last, community, communityLen);
+ last += communityLen;
+
+ memcpy(last, secName, secNameLen);
+ e->secName = last;
+ last += secNameLen;
+
+ if (contextNameLen) {
+ memcpy(last, contextName, contextNameLen);
+ e->contextName = last;
+ } else
+ e->contextName = last - 1;
+
+ memcpy(&e->network, &run_addr->sin6_addr, sizeof(struct in6_addr));
+ memcpy(&e->mask, mask, sizeof(struct in6_addr));
+
+ e->next = NULL;
+ if (*end != NULL) {
+ (*end)->next = e;
+ *end = e;
+ } else {
+ *end = *begin = e;
+ }
+ }
+ return 0;
+}
+
+void
+netsnmp_udp6_parse_security(const char *token, char *param)
+{
+ char secName[VACMSTRINGLEN + 1];
+ size_t secNameLen;
+ char contextName[VACMSTRINGLEN + 1];
+ size_t contextNameLen;
+ char community[COMMUNITY_MAX_LEN + 1];
+ size_t communityLen;
+ char source[300]; /* dns-name(253)+/(1)+mask(45)+\0(1) */
+ struct in6_addr mask;
+
+ /*
+ * Get security, source address/netmask and community strings.
+ */
+
+ param = copy_nword( param, secName, sizeof(secName));
+ if (strcmp(secName, "-Cn") == 0) {
+ if (!param) {
+ config_perror("missing CONTEXT_NAME parameter");
+ return;
+ }
+ param = copy_nword( param, contextName, sizeof(contextName));
+ contextNameLen = strlen(contextName) + 1;
+ if (contextNameLen > VACMSTRINGLEN) {
+ config_perror("context name too long");
+ return;
+ }
+ if (!param) {
+ config_perror("missing NAME parameter");
+ return;
+ }
+ param = copy_nword( param, secName, sizeof(secName));
+ } else {
+ contextNameLen = 0;
+ }
+
+ secNameLen = strlen(secName) + 1;
+ if (secNameLen == 1) {
+ config_perror("empty NAME parameter");
+ return;
+ } else if (secNameLen > VACMSTRINGLEN) {
+ config_perror("security name too long");
+ return;
+ }
+
+ if (!param) {
+ config_perror("missing SOURCE parameter");
+ return;
+ }
+ param = copy_nword( param, source, sizeof(source));
+ if (source[0] == '\0') {
+ config_perror("empty SOURCE parameter");
+ return;
+ }
+ if (strncmp(source, EXAMPLE_NETWORK, strlen(EXAMPLE_NETWORK)) == 0) {
+ config_perror("example config NETWORK not properly configured");
+ return;
+ }
+
+ if (!param) {
+ config_perror("missing COMMUNITY parameter");
+ return;
+ }
+ param = copy_nword( param, community, sizeof(community));
+ if (community[0] == '\0') {
+ config_perror("empty COMMUNITY parameter");
+ return;
+ }
+ communityLen = strlen(community) + 1;
+ if (communityLen >= COMMUNITY_MAX_LEN) {
+ config_perror("community name too long");
+ return;
+ }
+ if (communityLen == sizeof(EXAMPLE_COMMUNITY) &&
+ memcmp(community, EXAMPLE_COMMUNITY, sizeof(EXAMPLE_COMMUNITY)) == 0) {
+ config_perror("example config COMMUNITY not properly configured");
+ return;
+ }
+
+ /* Possible mask cases
+ * "default" <=> 0::0/0
+ * <hostname>[/] <=> <hostname>/128
+ * <hostname>/number <=> <hostname>/number
+ * <hostname>/<mask> <=> <hostname>/<mask>
+ */
+ {
+ /* Deal with the "default" case first. */
+ const int isdefault = strcmp(source, "default") == 0;
+
+ if (isdefault) {
+ memset(mask.s6_addr, '\0', sizeof(mask.s6_addr));
+ } else {
+ /* Split the source/netmask parts */
+ char *strmask = strchr(source, '/');
+ if (strmask != NULL)
+ /* Mask given. */
+ *strmask++ = '\0';
+
+ /* Try to interpret the mask */
+ if (strmask == NULL || *strmask == '\0') {
+ /* No mask was given. Assume /128 */
+ memset(mask.s6_addr, '\xff', sizeof(mask.s6_addr));
+ } else {
+ /* Try to interpret mask as a "number of 1 bits". */
+ char* cp;
+ long masklength = strtol(strmask, &cp, 10);
+ if (*cp == '\0') {
+ if (0 <= masklength && masklength <= 128) {
+ const int j = masklength / 8;
+ const int jj = masklength % 8;
+ memset(mask.s6_addr, '\xff', j);
+ if (j < 16) {
+ mask.s6_addr[j] = ((uint8_t)~0U << (8 - jj));
+ memset(mask.s6_addr + j + 1, '\0', 15 - j);
+ }
+ } else {
+ config_perror("bad mask length");
+ return;
+ }
+ }
+ /* Try to interpret mask numerically. */
+ else if (inet_pton(AF_INET6, strmask, &mask) != 1) {
+ config_perror("bad mask");
+ return;
+ }
+ }
+ }
+
+ {
+ struct sockaddr_in6 pton_addr;
+ struct addrinfo hints, *res = NULL;
+ memset(&hints, '\0', sizeof(hints));
+
+ /* First check if default, otherwise try to parse as a numeric
+ * address, if that also fails try to lookup the address */
+ if (isdefault) {
+ memset(&pton_addr.sin6_addr.s6_addr, '\0',
+ sizeof(struct in6_addr));
+ } else if (inet_pton(AF_INET6, source, &pton_addr.sin6_addr) != 1) {
+ /* Nope, wasn't a numeric address. Must be a hostname. */
+#if HAVE_GETADDRINFO
+ int gai_error;
+
+ hints.ai_family = AF_INET6;
+ hints.ai_socktype = SOCK_DGRAM;
+ gai_error = netsnmp_getaddrinfo(source, NULL, &hints, &res);
+ if (gai_error != 0) {
+ config_perror(gai_strerror(gai_error));
+ return;
+ }
+#else
+ config_perror("getaddrinfo() not available");
+ return;
+#endif
+ }
+ if (res == NULL) {
+ hints.ai_addrlen = sizeof(pton_addr);
+ hints.ai_addr = (struct sockaddr*)&pton_addr;
+ hints.ai_next = NULL;
+ res = &hints;
+ }
+
+ {
+ struct addrinfo *run;
+ int failed = 0;
+ com2Sec6Entry *begin = NULL, *end = NULL;
+
+ for (run = res; run && !failed; run = run->ai_next)
+ failed =
+ create_com2Sec6Entry(run, &mask,
+ secName, secNameLen,
+ contextName, contextNameLen,
+ community, communityLen,
+ &begin, &end);
+
+ if (failed) {
+ /* Free eventually allocated chunks */
+ while (begin) {
+ end = begin;
+ begin = begin->next;
+ free(end);
+ }
+ } else if (com2Sec6ListLast != NULL) {
+ com2Sec6ListLast->next = begin;
+ com2Sec6ListLast = end;
+ } else {
+ com2Sec6List = begin;
+ com2Sec6ListLast = end;
+ }
+ }
+#if HAVE_GETADDRINFO
+ if (res != &hints)
+ freeaddrinfo(res);
+#endif
+ }
+ }
+}
+
+void
+netsnmp_udp6_com2Sec6List_free(void)
+{
+ com2Sec6Entry *e = com2Sec6List;
+ while (e != NULL) {
+ com2Sec6Entry *tmp = e;
+ e = e->next;
+ free(tmp);
+ }
+ com2Sec6List = com2Sec6ListLast = NULL;
+}
+
+#endif /* support for community based SNMP */
+
+void
+netsnmp_udp6_agent_config_tokens_register(void)
+{
+#if !defined(NETSNMP_DISABLE_SNMPV1) || !defined(NETSNMP_DISABLE_SNMPV2C)
+ register_app_config_handler("com2sec6", netsnmp_udp6_parse_security,
+ netsnmp_udp6_com2Sec6List_free,
+ "[-Cn CONTEXT] secName IPv6-network-address[/netmask] community");
+#endif /* support for community based SNMP */
+}
+
+
+
+#if !defined(NETSNMP_DISABLE_SNMPV1) || !defined(NETSNMP_DISABLE_SNMPV2C)
+
+/*
+ * Return 0 if there are no com2sec entries, or return 1 if there ARE com2sec
+ * entries. On return, if a com2sec entry matched the passed parameters,
+ * then *secName points at the appropriate security name, or is NULL if the
+ * parameters did not match any com2sec entry.
+ */
+
+int
+netsnmp_udp6_getSecName(void *opaque, int olength,
+ const char *community,
+ int community_len,
+ const char **secName, const char **contextName)
+{
+ const com2Sec6Entry *c;
+ struct sockaddr_in6 *from = (struct sockaddr_in6 *) opaque;
+ char *ztcommunity = NULL;
+ char str6[INET6_ADDRSTRLEN];
+
+ if (secName != NULL) {
+ *secName = NULL; /* Haven't found anything yet */
+ }
+
+ /*
+ * Special case if there are NO entries (as opposed to no MATCHING
+ * entries).
+ */
+
+ if (com2Sec6List == NULL) {
+ DEBUGMSGTL(("netsnmp_udp6_getSecName", "no com2sec entries\n"));
+ return 0;
+ }
+
+ /*
+ * If there is no IPv6 source address, then there can be no valid security
+ * name.
+ */
+
+ if (opaque == NULL || olength != sizeof(struct sockaddr_in6)
+ || from->sin6_family != PF_INET6) {
+ DEBUGMSGTL(("netsnmp_udp6_getSecName",
+ "no IPv6 source address in PDU?\n"));
+ return 1;
+ }
+
+ ztcommunity = (char *) malloc(community_len + 1);
+ if (ztcommunity != NULL) {
+ memcpy(ztcommunity, community, community_len);
+ ztcommunity[community_len] = '\0';
+ }
+
+ inet_ntop(AF_INET6, &from->sin6_addr, str6, sizeof(str6));
+ DEBUGMSGTL(("netsnmp_udp6_getSecName", "resolve <\"%s\", %s>\n",
+ ztcommunity ? ztcommunity : "<malloc error>", str6));
+
+ for (c = com2Sec6List; c != NULL; c = c->next) {
+ {
+ char buf1[INET6_ADDRSTRLEN];
+ char buf2[INET6_ADDRSTRLEN];
+ DEBUGMSGTL(("netsnmp_udp6_getSecName",
+ "compare <\"%s\", %s/%s>", c->community,
+ inet_ntop(AF_INET6, &c->network, buf1, sizeof(buf1)),
+ inet_ntop(AF_INET6, &c->mask, buf2, sizeof(buf2))));
+ }
+ if ((community_len == (int)strlen(c->community)) &&
+ (memcmp(community, c->community, community_len) == 0)) {
+ int i, ok = 1;
+ for (i = 0; ok && i < 16; ++i)
+ if ((from->sin6_addr.s6_addr[i] & c->mask.s6_addr[i]) !=
+ c->network.s6_addr[i])
+ ok = 0;
+ if (ok) {
+ DEBUGMSG(("netsnmp_udp6_getSecName", "... SUCCESS\n"));
+ if (secName != NULL) {
+ *secName = c->secName;
+ *contextName = c->contextName;
+ }
+ }
+ }
+ }
+ DEBUGMSG(("netsnmp_udp6_getSecName", "... nope\n"));
+
+ if (ztcommunity != NULL) {
+ free(ztcommunity);
+ }
+ return 1;
+}
+#endif /* support for community based SNMP */
+
+netsnmp_transport *
+netsnmp_udp6_create_tstring(const char *str, int local,
+ const char *default_target)
+{
+ struct sockaddr_in6 addr;
+
+ if (netsnmp_sockaddr_in6_2(&addr, str, default_target)) {
+ return netsnmp_udp6_transport(&addr, local);
+ } else {
+ return NULL;
+ }
+}
+
+
+/*
+ * See:
+ *
+ * http://www.ietf.org/internet-drafts/draft-ietf-ops-taddress-mib-01.txt
+ *
+ * (or newer equivalent) for details of the TC which we are using for
+ * the mapping here.
+ */
+
+netsnmp_transport *
+netsnmp_udp6_create_ostring(const u_char * o, size_t o_len, int local)
+{
+ struct sockaddr_in6 addr;
+
+ if (o_len == 18) {
+ memset((u_char *) & addr, 0, sizeof(struct sockaddr_in6));
+ addr.sin6_family = AF_INET6;
+ memcpy((u_char *) & (addr.sin6_addr.s6_addr), o, 16);
+ addr.sin6_port = (o[16] << 8) + o[17];
+ return netsnmp_udp6_transport(&addr, local);
+ }
+ return NULL;
+}
+
+
+void
+netsnmp_udpipv6_ctor(void)
+{
+ udp6Domain.name = netsnmp_UDPIPv6Domain;
+ udp6Domain.name_length = sizeof(netsnmp_UDPIPv6Domain) / sizeof(oid);
+ udp6Domain.f_create_from_tstring = NULL;
+ udp6Domain.f_create_from_tstring_new = netsnmp_udp6_create_tstring;
+ udp6Domain.f_create_from_ostring = netsnmp_udp6_create_ostring;
+ udp6Domain.prefix = (const char**)calloc(5, sizeof(char *));
+ udp6Domain.prefix[0] = "udp6";
+ udp6Domain.prefix[1] = "ipv6";
+ udp6Domain.prefix[2] = "udpv6";
+ udp6Domain.prefix[3] = "udpipv6";
+
+ netsnmp_tdomain_register(&udp6Domain);
+}
+
+#else
+
+#ifdef NETSNMP_DLL
+/* need this hook for win32 MSVC++ DLL build */
+void
+netsnmp_udp6_agent_config_tokens_register(void)
+{ }
+#endif
+
+#endif /* NETSNMP_TRANSPORT_UDPIPV6_DOMAIN */
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-04 14:21:43 +0000