static int
netsnmp_tcp6_accept(netsnmp_transport *t)
{
struct sockaddr_in6 *farend = NULL;
int newsock = -1;
socklen_t farendlen = sizeof(struct sockaddr_in6);
char *str = 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 = (int) 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;
str = netsnmp_tcp6_fmtaddr(NULL, farend, farendlen);
DEBUGMSGTL(("netsnmp_tcp6", "accept succeeded (from %s)\n", str));
free(str);
/*
* Try to make the new socket blocking.
*/
if (netsnmp_set_non_blocking_mode(newsock, FALSE) < 0)
DEBUGMSGTL(("netsnmp_tcp6",
"accept: couldn't f_getfl of fd %d\n", newsock));
/*
* 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;
}
}
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 *str = 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;
str = netsnmp_tcp6_fmtaddr(NULL, farend, farendlen);
DEBUGMSGTL(("netsnmp_tcp6", "accept succeeded (from %s)\n", str));
free(str);
/*
* 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
return newsock;
} else {
free(farend);
return -1;
}
}
netsnmp_transport *
netsnmp_tcp6_transport(struct sockaddr_in6 *addr, int local)
{
netsnmp_transport *t = NULL;
int rc = 0;
char *str = 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));
str = netsnmp_tcp6_fmtaddr(NULL, (void *)addr,
sizeof(struct sockaddr_in6));
DEBUGMSGTL(("netsnmp_tcp6", "open %s %s\n", local ? "local" : "remote",
str));
free(str);
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.
*/
#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
t->flags |= NETSNMP_TRANSPORT_FLAG_LISTEN;
t->local = (unsigned char*)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 {
