database/mariadb-columnstore-engine
1
0
Fork 0
mirror of https://github.com/mariadb-corporation/mariadb-columnstore-engine.git synced 2025-11-03 17:13:17 +03:00
Code Activity
Files
ae2f6092de54b779ba0178b2a78cb15f4735c38e
mariadb-columnstore-engine/net-snmp/net-snmp-5.2.1.2/snmplib/snmpTCPIPv6Domain.c
david hill f6afc42dd0 the begginning
2016-01-06 14:08:59 -06:00

481 lines
12 KiB
C
Raw Blame History

#include <net-snmp/net-snmp-config.h>
#ifdef SNMP_TRANSPORT_TCPIPV6_DOMAIN
/*
* hack-o-matic for Cygwin to use winsock2
*/
#if defined(cygwin)
#undef HAVE_UNISTD_H
#undef HAVE_NETINET_IN_H
#undef HAVE_ARPA_INET_H
#undef HAVE_NET_IF_H
#undef HAVE_NETDB_H
#undef HAVE_SYS_PARAM_H
#undef HAVE_SYS_SELECT_H
#undef HAVE_SYS_SOCKET_H
#undef HAVE_IN_ADDR_T
#endif
#include <stdio.h>
#include <sys/types.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 defined(HAVE_WINSOCK_H) || defined(cygwin)
/*
* Windows IPv6 support is part of WinSock2 only
*/
#include <winsock2.h>
#include <ws2tcpip.h>
extern const char *inet_ntop(int, const void*, char*, size_t);
#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_FCNTL_H
#include <fcntl.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/snmpUDPIPv6Domain.h>
#include <net-snmp/library/snmpTCPIPv6Domain.h>
oid netsnmp_TCPIPv6Domain[] = { TRANSPORT_DOMAIN_TCP_IPV6 };
static netsnmp_tdomain tcp6Domain;
/*
* Return a string representing the address in data, or else the "far end"
* address if data is NULL.
*/
static char *
netsnmp_tcp6_fmtaddr(netsnmp_transport *t, void *data, int len)
{
struct sockaddr_in6 *to = NULL;
DEBUGMSGTL(("netsnmp_tcp6", "fmtaddr: t = %p, data = %p, len = %d\n", t,
data, len));
if (data != NULL && len == sizeof(struct sockaddr_in6)) {
to = (struct sockaddr_in6 *) data;
} else if (t != NULL && t->data != NULL) {
to = (struct sockaddr_in6 *) t->data;
}
if (to == NULL) {
return strdup("TCP/IPv6: unknown");
} else {
char addr[INET6_ADDRSTRLEN];
char tmp[INET6_ADDRSTRLEN + 8];
sprintf(tmp, "TCP/IPv6: [%s]:%hd",
inet_ntop(AF_INET6, (void *) &(to->sin6_addr), addr,
INET6_ADDRSTRLEN), ntohs(to->sin6_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_tcp6_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) {
DEBUGMSGTL(("netsnmp_tcp6", "recv fd %d err %d (\"%s\")\n",
t->sock, errno, strerror(errno)));
return -1;
}
}
DEBUGMSGTL(("netsnmp_tcp6", "recv fd %d got %d bytes\n", t->sock, rc));
} else {
return -1;
}
if (opaque != NULL && olength != NULL) {
if (t->data_length > 0) {
if ((*opaque = malloc(t->data_length)) != NULL) {
memcpy(*opaque, t->data, t->data_length);
*olength = t->data_length;
} else {
*olength = 0;
}
} else {
*opaque = NULL;
*olength = 0;
}
}
return rc;
}
static int
netsnmp_tcp6_send(netsnmp_transport *t, void *buf, int size,
void **opaque, int *olength)
{
int rc = -1;
if (t != NULL && t->sock >= 0) {
while (rc < 0) {
rc = send(t->sock, buf, size, 0);
if (rc < 0 && errno != EINTR) {
break;
}
}
}
return rc;
}
static int
netsnmp_tcp6_close(netsnmp_transport *t)
{
int rc = -1;
if (t != NULL && t->sock >= 0) {
DEBUGMSGTL(("netsnmp_tcp6", "close fd %d\n", t->sock));
#ifndef HAVE_CLOSESOCKET
rc = close(t->sock);
#else
rc = closesocket(t->sock);
#endif
t->sock = -1;
}
return rc;
}
static int
netsnmp_tcp6_accept(netsnmp_transport *t)
{
struct sockaddr_in6 *farend = NULL;
int newsock = -1, sockflags = 0;
socklen_t farendlen = sizeof(struct sockaddr_in6);
char *string = NULL;
farend = (struct sockaddr_in6 *) malloc(sizeof(struct sockaddr_in6));
if (farend == NULL) {
/*
* Indicate that the acceptance of this socket failed.
*/
DEBUGMSGTL(("netsnmp_tcp6", "accept: malloc failed\n"));
return -1;
}
if (t != NULL && t->sock >= 0) {
newsock = accept(t->sock, (struct sockaddr *) farend, &farendlen);
if (newsock < 0) {
DEBUGMSGTL(("netsnmp_tcp6","accept failed rc %d errno %d \"%s\"\n",
newsock, errno, strerror(errno)));
free(farend);
return newsock;
}
if (t->data != NULL) {
free(t->data);
}
t->data = farend;
t->data_length = farendlen;
string = netsnmp_tcp6_fmtaddr(NULL, farend, farendlen);
DEBUGMSGTL(("netsnmp_tcp6", "accept succeeded (from %s)\n", string));
free(string);
/*
* Try to make the new socket blocking.
*/
#ifdef WIN32
ioctlsocket(newsock, FIONBIO, &sockflags);
#else
if ((sockflags = fcntl(newsock, F_GETFL, 0)) >= 0) {
fcntl(newsock, F_SETFL, (sockflags & ~O_NONBLOCK));
} else {
DEBUGMSGTL(("netsnmp_tcp6", "accept: couldn't f_getfl of fd %d\n",
newsock));
}
#endif
/*
* Allow user to override the send and receive buffers. Default is
* to use os default. Don't worry too much about errors --
* just plough on regardless.
*/
netsnmp_sock_buffer_set(newsock, SO_SNDBUF, 1, 0);
netsnmp_sock_buffer_set(newsock, SO_RCVBUF, 1, 0);
return newsock;
} else {
free(farend);
return -1;
}
}
/*
* Open a TCP/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_tcp6_transport(struct sockaddr_in6 *addr, int local)
{
netsnmp_transport *t = NULL;
int rc = 0;
char *string = NULL;
if (addr == NULL || addr->sin6_family != AF_INET6) {
return NULL;
}
t = (netsnmp_transport *) malloc(sizeof(netsnmp_transport));
if (t == NULL) {
return NULL;
}
memset(t, 0, sizeof(netsnmp_transport));
string = netsnmp_tcp6_fmtaddr(NULL, (void *)addr,
sizeof(struct sockaddr_in6));
DEBUGMSGTL(("netsnmp_tcp6", "open %s %s\n", local ? "local" : "remote",
string));
free(string);
memset(t, 0, sizeof(netsnmp_transport));
t->data = malloc(sizeof(struct sockaddr_in6));
if (t->data == NULL) {
netsnmp_transport_free(t);
return NULL;
}
t->data_length = sizeof(struct sockaddr_in6);
memcpy(t->data, addr, sizeof(struct sockaddr_in6));
t->domain = netsnmp_TCPIPv6Domain;
t->domain_length = sizeof(netsnmp_TCPIPv6Domain) / sizeof(oid);
t->sock = socket(PF_INET6, SOCK_STREAM, 0);
if (t->sock < 0) {
netsnmp_transport_free(t);
return NULL;
}
t->flags = NETSNMP_TRANSPORT_FLAG_STREAM;
if (local) {
int sockflags = 0, opt = 1;
/*
* This session is inteneded 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.
*/
t->flags |= NETSNMP_TRANSPORT_FLAG_LISTEN;
t->local = malloc(18);
if (t->local == NULL) {
netsnmp_tcp6_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;
/*
* We should set SO_REUSEADDR too.
*/
setsockopt(t->sock, SOL_SOCKET, SO_REUSEADDR, (void *)&opt, sizeof(opt));
rc = bind(t->sock, (struct sockaddr *) addr,
sizeof(struct sockaddr_in6));
if (rc != 0) {
netsnmp_tcp6_close(t);
netsnmp_transport_free(t);
return NULL;
}
/*
* Since we are going to be letting select() tell us when connections
* are ready to be accept()ed, we need to make the socket n0n-blocking
* to avoid the race condition described in W. R. Stevens, ``Unix
* Network Programming Volume I Second Edition'', pp. 422--4, which
* could otherwise wedge the agent.
*/
#ifdef WIN32
opt = 1;
ioctlsocket(t->sock, FIONBIO, &opt);
#else
sockflags = fcntl(t->sock, F_GETFL, 0);
fcntl(t->sock, F_SETFL, sockflags | O_NONBLOCK);
#endif
/*
* Now sit here and wait for connections to arrive.
*/
rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
if (rc != 0) {
netsnmp_tcp6_close(t);
netsnmp_transport_free(t);
return NULL;
}
/*
* no buffer size on listen socket - doesn't make sense
*/
} else {
t->remote = malloc(18);
if (t->remote == NULL) {
netsnmp_tcp6_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;
/*
* This is a client-type session, so attempt to connect to the far
* end. We don't go non-blocking here because it's not obvious what
* you'd then do if you tried to do snmp_sends before the connection
* had completed. So this can block.
*/
rc = connect(t->sock, (struct sockaddr *) addr,
sizeof(struct sockaddr_in6));
DEBUGMSGTL(("netsnmp_tcp6", "connect returns %d\n", rc));
if (rc < 0) {
netsnmp_tcp6_close(t);
netsnmp_transport_free(t);
return NULL;
}
/*
* Allow user to override the send and receive buffers. Default is
* to use os default. Don't worry too much about errors --
* just plough on regardless.
*/
netsnmp_sock_buffer_set(t->sock, SO_SNDBUF, local, 0);
netsnmp_sock_buffer_set(t->sock, SO_RCVBUF, local, 0);
}
/*
* Message size is not limited by this transport (hence msgMaxSize
* is equal to the maximum legal size of an SNMP message).
*/
t->msgMaxSize = 0x7fffffff;
t->f_recv = netsnmp_tcp6_recv;
t->f_send = netsnmp_tcp6_send;
t->f_close = netsnmp_tcp6_close;
t->f_accept = netsnmp_tcp6_accept;
t->f_fmtaddr = netsnmp_tcp6_fmtaddr;
return t;
}
netsnmp_transport *
netsnmp_tcp6_create_tstring(const char *string, int local)
{
struct sockaddr_in6 addr;
if (netsnmp_sockaddr_in6(&addr, string, 0)) {
return netsnmp_tcp6_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_tcp6_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_tcp6_transport(&addr, local);
}
return NULL;
}
void
netsnmp_tcp6_ctor(void)
{
tcp6Domain.name = netsnmp_TCPIPv6Domain;
tcp6Domain.name_length = sizeof(netsnmp_TCPIPv6Domain) / sizeof(oid);
tcp6Domain.f_create_from_tstring = netsnmp_tcp6_create_tstring;
tcp6Domain.f_create_from_ostring = netsnmp_tcp6_create_ostring;
tcp6Domain.prefix = calloc(4, sizeof(char *));
tcp6Domain.prefix[0] = "tcp6";
tcp6Domain.prefix[1] = "tcpv6";
tcp6Domain.prefix[2] = "tcpipv6";
netsnmp_tdomain_register(&tcp6Domain);
}
#endif /* SNMP_TRANSPORT_TCPIPV6_DOMAIN */
View Git Blame Copy Permalink