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mariadb-columnstore-engine/net-snmp/net-snmp-5.2.1.2/snmplib/snmpIPXDomain.c
david hill f6afc42dd0 the begginning
2016-01-06 14:08:59 -06:00

428 lines
11 KiB
C
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#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
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#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/snmpIPXDomain.h>
#define SNMP_IPX_DEFAULT_PORT 36879 /* Specified in RFC 1420. */
static netsnmp_tdomain ipxDomain;
/*
* Return a string representing the address in data, or else the "far end"
* address if data is NULL.
*/
static char *
netsnmp_ipx_fmtaddr(netsnmp_transport *t, void *data, int len)
{
struct sockaddr_ipx *to = NULL;
if (data != NULL && len == sizeof(struct sockaddr_ipx)) {
to = (struct sockaddr_ipx *) data;
} else if (t != NULL && t->data != NULL) {
to = (struct sockaddr_ipx *) t->data;
}
if (to == NULL) {
return strdup("IPX: unknown");
} else {
char tmp[64];
sprintf(tmp, "IPX: %08X:%02X%02X%02X%02X%02X%02X/%hu",
ntohl(to->sipx_network), to->sipx_node[0],
to->sipx_node[1], to->sipx_node[2], to->sipx_node[3],
to->sipx_node[4], to->sipx_node[5], ntohs(to->sipx_port));
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_ipx_recv(netsnmp_transport *t, void *buf, int size,
void **opaque, int *olength)
{
int rc = -1, fromlen = sizeof(struct sockaddr);
struct sockaddr *from;
if (t != NULL && t->sock >= 0) {
from = (struct sockaddr *)malloc(sizeof(struct sockaddr_ipx));
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) {
char *string = netsnmp_ipx_fmtaddr(NULL, from, fromlen);
DEBUGMSGTL(("netsnmp_ipx","recvfrom fd %d got %d bytes(from %s)\n",
t->sock, rc, string));
free(string);
} else {
DEBUGMSGTL(("netsnmp_ipx", "recvfrom fd %d err %d (\"%s\")\n",
t->sock, errno, strerror(errno)));
}
*opaque = (void *) from;
*olength = sizeof(struct sockaddr_ipx);
}
return rc;
}
static int
netsnmp_ipx_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_ipx)) {
to = (struct sockaddr *) (*opaque);
} else if (t != NULL && t->data != NULL &&
t->data_length == sizeof(struct sockaddr_ipx)) {
to = (struct sockaddr *) (t->data);
}
if (to != NULL && t != NULL && t->sock >= 0) {
char *string = netsnmp_ipx_fmtaddr(NULL, (void *)to,
sizeof(struct sockaddr_ipx));
DEBUGMSGTL(("netsnmp_ipx", "send %d bytes from %p to %s on fd %d\n",
size, buf, string, t->sock));
free(string);
while (rc < 0) {
rc = sendto(t->sock, buf, size, 0, to, sizeof(struct sockaddr));
if (rc < 0 && errno != EINTR) {
break;
}
}
}
return rc;
}
static int
netsnmp_ipx_close(netsnmp_transport *t)
{
int rc = -1;
if (t->sock >= 0) {
#ifndef HAVE_CLOSESOCKET
rc = close(t->sock);
#else
rc = closesocket(t->sock);
#endif
t->sock = -1;
}
return rc;
}
/*
* Open a IPX-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_ipx_transport(struct sockaddr_ipx *addr, int local)
{
netsnmp_transport *t = NULL;
int rc = 0;
char *string = NULL;
if (addr == NULL || addr->sipx_family != AF_IPX) {
return NULL;
}
t = (netsnmp_transport *) malloc(sizeof(netsnmp_transport));
if (t == NULL) {
return NULL;
}
string = netsnmp_ipx_fmtaddr(NULL, (void *)addr,
sizeof(struct sockaddr_ipx));
DEBUGMSGTL(("netsnmp_ipx", "open %s %s\n", local ? "local" : "remote",
string));
free(string);
memset(t, 0, sizeof(netsnmp_transport));
t->domain = netsnmpIPXDomain;
t->domain_length = netsnmpIPXDomain_len;
t->sock = socket(AF_IPX, SOCK_DGRAM, AF_IPX);
if (t->sock < 0) {
netsnmp_transport_free(t);
return NULL;
}
if (local) {
t->local = malloc(12);
if (t->local == NULL) {
netsnmp_transport_free(t);
return NULL;
}
memcpy(&(t->local[00]), (u_char *) & (addr->sipx_network), 4);
memcpy(&(t->local[04]), (u_char *) & (addr->sipx_node), 6);
memcpy(&(t->local[10]), (u_char *) & (addr->sipx_port), 2);
t->local_length = 12;
/*
* This session is inteneded as a server, so we must bind on to the
* given address (which may include a particular network and/or node
* address, but definitely includes a port number).
*/
rc = bind(t->sock, (struct sockaddr *) addr,
sizeof(struct sockaddr));
if (rc != 0) {
netsnmp_ipx_close(t);
netsnmp_transport_free(t);
return NULL;
}
t->data = NULL;
t->data_length = 0;
} else {
t->remote = malloc(12);
if (t->remote == NULL) {
netsnmp_transport_free(t);
return NULL;
}
memcpy(&(t->remote[00]), (u_char *) & (addr->sipx_network), 4);
memcpy(&(t->remote[04]), (u_char *) & (addr->sipx_node), 6);
memcpy(&(t->remote[10]), (u_char *) & (addr->sipx_port), 2);
t->remote_length = 12;
/*
* This is a client session. Save the address in the
* transport-specific data pointer for later use by snmp_ipx_send.
*/
t->data = malloc(sizeof(struct sockaddr_ipx));
if (t->data == NULL) {
netsnmp_transport_free(t);
return NULL;
}
memcpy(t->data, addr, sizeof(struct sockaddr_ipx));
t->data_length = sizeof(struct sockaddr_ipx);
}
/*
* Maximum size of an IPX PDU is 576 bytes including a 30-byte header.
* Ridiculous!
*/
t->msgMaxSize = 576 - 30;
t->f_recv = netsnmp_ipx_recv;
t->f_send = netsnmp_ipx_send;
t->f_close = netsnmp_ipx_close;
t->f_accept = NULL;
t->f_fmtaddr = netsnmp_ipx_fmtaddr;
return t;
}
/*
* Attempt to parse a string of the form [%08x]:%12x[/%d] where the parts
* are the network number, the node address and the port in that order.
*/
int
netsnmp_sockaddr_ipx(struct sockaddr_ipx *addr, const char *peername)
{
char *cp = NULL;
unsigned int network = 0, i = 0;
if (addr == NULL) {
return 0;
}
memset(addr, 0, sizeof(struct sockaddr_ipx));
DEBUGMSGTL(("netsnmp_sockaddr_ipx", "addr %p, peername \"%s\"\n",
addr, peername ? peername : "[NIL]"));
addr->sipx_family = AF_IPX;
addr->sipx_type = 4; /* Specified in RFC 1420. */
if (peername == NULL) {
return 0;
}
/*
* Skip leading white space.
*/
while (*peername && isspace((int) *peername)) {
peername++;
}
if (!*peername) {
/*
* Completely blank address. Let this mean "any network, any address,
* default SNMP port".
*/
addr->sipx_network = htonl(0);
for (i = 0; i < 6; i++) {
addr->sipx_node[i] = 0;
}
addr->sipx_port = htons(SNMP_IPX_DEFAULT_PORT);
return 1;
}
/*
* Try to get a leading network address.
*/
network = strtoul(peername, &cp, 16);
if (cp != peername) {
DEBUGMSGTL(("netsnmp_sockaddr_ipx", "network parsed okay\n"));
addr->sipx_network = htonl(network);
peername = cp;
} else {
DEBUGMSGTL(("netsnmp_sockaddr_ipx",
"no network part of address\n"));
addr->sipx_network = htonl(0);
}
if (*peername == ':') {
/*
* Okay we are looking for a node number plus optionally a port here.
*/
int node[6] = { 0, 0, 0, 0, 0, 0 }, rc = 0;
unsigned short port = 0;
rc = sscanf(peername, ":%02X%02X%02X%02X%02X%02X/%hu",
&node[0], &node[1], &node[2], &node[3], &node[4],
&node[5], &port);
if (rc < 6) {
DEBUGMSGTL(("netsnmp_sockaddr_ipx",
"no node -- fail (rc %d)\n", rc));
return 0;
} else if (rc == 6) {
DEBUGMSGTL(("netsnmp_sockaddr_ipx", "node, no port\n"));
for (i = 0; i < 6; i++) {
addr->sipx_node[i] = node[i];
}
addr->sipx_port = htons(SNMP_IPX_DEFAULT_PORT);
} else if (rc == 7) {
DEBUGMSGTL(("netsnmp_sockaddr_ipx", "node and port\n"));
for (i = 0; i < 6; i++) {
addr->sipx_node[i] = node[i];
}
addr->sipx_port = htons(port);
}
} else if (*peername == '/') {
/*
* Okay we are just looking for a port number here.
*/
unsigned short port = 0;
for (i = 0; i < 6; i++) {
addr->sipx_node[i] = 0;
}
if (sscanf(peername, "/%hu", &port) != 1) {
DEBUGMSGTL(("netsnmp_sockaddr_ipx", "no port\n"));
addr->sipx_port = htons(SNMP_IPX_DEFAULT_PORT);
} else {
addr->sipx_port = htons(port);
}
} else {
return 0;
}
return 1;
}
netsnmp_transport *
netsnmp_ipx_create_tstring(const char *string, int local)
{
struct sockaddr_ipx addr;
if (netsnmp_sockaddr_ipx(&addr, string)) {
return netsnmp_ipx_transport(&addr, local);
} else {
return NULL;
}
}
netsnmp_transport *
netsnmp_ipx_create_ostring(const u_char * o, size_t o_len, int local)
{
struct sockaddr_ipx addr;
if (o_len == 12) {
addr.sipx_family = AF_IPX;
memcpy((u_char *) & (addr.sipx_network), &(o[00]), 4);
memcpy((u_char *) & (addr.sipx_node), &(o[04]), 6);
memcpy((u_char *) & (addr.sipx_port), &(o[10]), 2);
return netsnmp_ipx_transport(&addr, local);
}
return NULL;
}
void
netsnmp_ipx_ctor(void)
{
ipxDomain.name = netsnmpIPXDomain;
ipxDomain.name_length = netsnmpIPXDomain_len;
ipxDomain.prefix = calloc(2, sizeof(char *));
ipxDomain.prefix[0] = "ipx";
ipxDomain.f_create_from_tstring = netsnmp_ipx_create_tstring;
ipxDomain.f_create_from_ostring = netsnmp_ipx_create_ostring;
netsnmp_tdomain_register(&ipxDomain);
}
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