// DNS-Stuff
GNUNET_NETWORK_STRUCT_BEGIN
/* FIXME: replace this one with the one from tcpip_tun.h! */
-struct dns_header
+struct GNUNET_TUN_DnsHeader
{
uint16_t id GNUNET_PACKED;
struct GNUNET_DNSPARSER_Flags flags;
size_t udp_payload_length)
{
struct GNUNET_DNSPARSER_Packet *p;
- const struct dns_header *dns;
+ const struct GNUNET_TUN_DnsHeader *dns;
size_t off;
unsigned int n;
unsigned int i;
- if (udp_payload_length < sizeof (struct dns_header))
+ if (udp_payload_length < sizeof (struct GNUNET_TUN_DnsHeader))
return NULL;
- dns = (const struct dns_header *) udp_payload;
- off = sizeof (struct dns_header);
+ dns = (const struct GNUNET_TUN_DnsHeader *) udp_payload;
+ off = sizeof (struct GNUNET_TUN_DnsHeader);
p = GNUNET_malloc (sizeof (struct GNUNET_DNSPARSER_Packet));
p->flags = dns->flags;
p->id = dns->id;
char **buf,
size_t *buf_length)
{
- struct dns_header dns;
+ struct GNUNET_TUN_DnsHeader dns;
size_t off;
char tmp[max];
unsigned int i;
dns.authority_rcount = htons (p->num_authority_records);
dns.additional_rcount = htons (p->num_additional_records);
- off = sizeof (struct dns_header);
+ off = sizeof (struct GNUNET_TUN_DnsHeader);
trc = GNUNET_NO;
for (i=0;i<p->num_queries;i++)
{
if (GNUNET_YES == trc)
dns.flags.message_truncated = 1;
- memcpy (tmp, &dns, sizeof (struct dns_header));
+ memcpy (tmp, &dns, sizeof (struct GNUNET_TUN_DnsHeader));
*buf = GNUNET_malloc (off);
*buf_length = off;
/* send response via hijacker */
reply_len = sizeof (struct GNUNET_MessageHeader);
- reply_len += sizeof (struct tun_header);
+ reply_len += sizeof (struct GNUNET_TUN_Layer2PacketHeader);
switch (rr->src_addr.ss_family)
{
case AF_INET:
- reply_len += sizeof (struct ip4_header);
+ reply_len += sizeof (struct GNUNET_TUN_IPv4Header);
break;
case AF_INET6:
- reply_len += sizeof (struct ip6_header);
+ reply_len += sizeof (struct GNUNET_TUN_IPv6Header);
break;
default:
GNUNET_break (0);
cleanup_rr (rr);
return;
}
- reply_len += sizeof (struct udp_packet);
+ reply_len += sizeof (struct GNUNET_TUN_UdpHeader);
reply_len += rr->payload_length;
if (reply_len >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
/* first, TUN header */
{
- struct tun_header tun;
+ struct GNUNET_TUN_Layer2PacketHeader tun;
tun.flags = htons (0);
if (rr->src_addr.ss_family == AF_INET)
tun.proto = htons (ETH_P_IPV4);
else
tun.proto = htons (ETH_P_IPV6);
- memcpy (&buf[off], &tun, sizeof (struct tun_header));
- off += sizeof (struct tun_header);
+ memcpy (&buf[off], &tun, sizeof (struct GNUNET_TUN_Layer2PacketHeader));
+ off += sizeof (struct GNUNET_TUN_Layer2PacketHeader);
}
/* now IP header */
{
struct sockaddr_in *src = (struct sockaddr_in *) &rr->src_addr;
struct sockaddr_in *dst = (struct sockaddr_in *) &rr->dst_addr;
- struct ip4_header ip;
+ struct GNUNET_TUN_IPv4Header ip;
spt = dst->sin_port;
dpt = src->sin_port;
- ip.header_length = sizeof (struct ip4_header) / 4;
+ ip.header_length = sizeof (struct GNUNET_TUN_IPv4Header) / 4;
ip.version = IPVERSION; /* aka 4 */
ip.diff_serv = 0;
ip.total_length = htons ((uint16_t) reply_len - off);
udp_crc_sum = GNUNET_CRYPTO_crc16_step (udp_crc_sum,
&tmp,
sizeof (uint16_t));
- tmp = htons (rr->payload_length + sizeof (struct udp_packet));
+ tmp = htons (rr->payload_length + sizeof (struct GNUNET_TUN_UdpHeader));
udp_crc_sum = GNUNET_CRYPTO_crc16_step (udp_crc_sum,
&tmp,
sizeof (uint16_t));
{
struct sockaddr_in6 *src = (struct sockaddr_in6 *) &rr->src_addr;
struct sockaddr_in6 *dst = (struct sockaddr_in6 *) &rr->dst_addr;
- struct ip6_header ip;
+ struct GNUNET_TUN_IPv6Header ip;
spt = dst->sin6_port;
dpt = src->sin6_port;
{
uint32_t tmp;
- tmp = htons (rr->payload_length + sizeof (struct udp_packet));
+ tmp = htons (rr->payload_length + sizeof (struct GNUNET_TUN_UdpHeader));
udp_crc_sum = GNUNET_CRYPTO_crc16_step (udp_crc_sum,
&tmp,
sizeof (uint32_t));
/* now UDP header */
{
- struct udp_packet udp;
+ struct GNUNET_TUN_UdpHeader udp;
udp.spt = spt;
udp.dpt = dpt;
{
case AF_INET:
dnsout = dnsout4;
- salen = sizeof (struct ip4_header);
+ salen = sizeof (struct GNUNET_TUN_IPv4Header);
break;
case AF_INET6:
dnsout = dnsout6;
- salen = sizeof (struct ip6_header);
+ salen = sizeof (struct GNUNET_TUN_IPv6Header);
break;
default:
GNUNET_break (0);
struct sockaddr_in addr4;
struct sockaddr_in6 addr6;
struct sockaddr *addr;
- struct dns_header *dns;
+ struct GNUNET_TUN_DnsHeader *dns;
socklen_t addrlen;
struct RequestRecord *rr;
ssize_t r;
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "recvfrom");
return;
}
- if (sizeof (struct dns_header) > r)
+ if (sizeof (struct GNUNET_TUN_DnsHeader) > r)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Received DNS response that is too small (%u bytes)"),
r);
return;
}
- dns = (struct dns_header *) buf;
+ dns = (struct GNUNET_TUN_DnsHeader *) buf;
rr = &requests[dns->id];
if (rr->phase != RP_INTERNET_DNS)
{
break;
case 2: /* update */
msize -= sizeof (struct GNUNET_DNS_Response);
- if ( (sizeof (struct dns_header) > msize) ||
+ if ( (sizeof (struct GNUNET_TUN_DnsHeader) > msize) ||
(RP_REQUEST_MONITOR == rr->phase) ||
(RP_RESPONSE_MONITOR == rr->phase) )
{
const struct GNUNET_MessageHeader *message)
{
uint16_t msize;
- const struct tun_header *tun;
- const struct ip4_header *ip4;
- const struct ip6_header *ip6;
- const struct udp_packet *udp;
- const struct dns_header *dns;
+ const struct GNUNET_TUN_Layer2PacketHeader *tun;
+ const struct GNUNET_TUN_IPv4Header *ip4;
+ const struct GNUNET_TUN_IPv6Header *ip6;
+ const struct GNUNET_TUN_UdpHeader *udp;
+ const struct GNUNET_TUN_DnsHeader *dns;
struct RequestRecord *rr;
struct sockaddr_in *srca4;
struct sockaddr_in6 *srca6;
struct sockaddr_in6 *dsta6;
msize = ntohs (message->size);
- if (msize < sizeof (struct GNUNET_MessageHeader) + sizeof (struct tun_header) + sizeof (struct ip4_header))
+ if (msize < sizeof (struct GNUNET_MessageHeader) + sizeof (struct GNUNET_TUN_Layer2PacketHeader) + sizeof (struct GNUNET_TUN_IPv4Header))
{
/* non-IP packet received on TUN!? */
GNUNET_break (0);
return;
}
msize -= sizeof (struct GNUNET_MessageHeader);
- tun = (const struct tun_header *) &message[1];
- msize -= sizeof (struct tun_header);
+ tun = (const struct GNUNET_TUN_Layer2PacketHeader *) &message[1];
+ msize -= sizeof (struct GNUNET_TUN_Layer2PacketHeader);
switch (ntohs (tun->proto))
{
case ETH_P_IPV4:
- ip4 = (const struct ip4_header *) &tun[1];
- if ( (msize < sizeof (struct ip4_header)) ||
+ ip4 = (const struct GNUNET_TUN_IPv4Header *) &tun[1];
+ if ( (msize < sizeof (struct GNUNET_TUN_IPv4Header)) ||
(ip4->version != IPVERSION) ||
- (ip4->header_length != sizeof (struct ip4_header) / 4) ||
+ (ip4->header_length != sizeof (struct GNUNET_TUN_IPv4Header) / 4) ||
(ntohs(ip4->total_length) != msize) ||
(ip4->protocol != IPPROTO_UDP) )
{
_("Received malformed IPv4-UDP packet on TUN interface.\n"));
return;
}
- udp = (const struct udp_packet*) &ip4[1];
- msize -= sizeof (struct ip4_header);
+ udp = (const struct GNUNET_TUN_UdpHeader*) &ip4[1];
+ msize -= sizeof (struct GNUNET_TUN_IPv4Header);
break;
case ETH_P_IPV6:
- ip6 = (const struct ip6_header *) &tun[1];
- if ( (msize < sizeof (struct ip6_header)) ||
+ ip6 = (const struct GNUNET_TUN_IPv6Header *) &tun[1];
+ if ( (msize < sizeof (struct GNUNET_TUN_IPv6Header)) ||
(ip6->version != 6) ||
(ntohs (ip6->payload_length) != msize) ||
(ip6->next_header != IPPROTO_UDP) )
_("Received malformed IPv6-UDP packet on TUN interface.\n"));
return;
}
- udp = (const struct udp_packet*) &ip6[1];
- msize -= sizeof (struct ip6_header);
+ udp = (const struct GNUNET_TUN_UdpHeader*) &ip6[1];
+ msize -= sizeof (struct GNUNET_TUN_IPv6Header);
break;
default:
/* non-IP packet received on TUN!? */
ntohs (tun->proto));
return;
}
- if (msize <= sizeof (struct udp_packet) + sizeof (struct dns_header))
+ if (msize <= sizeof (struct GNUNET_TUN_UdpHeader) + sizeof (struct GNUNET_TUN_DnsHeader))
{
/* non-DNS packet received on TUN, ignore */
GNUNET_STATISTICS_update (stats,
1, GNUNET_NO);
return;
}
- msize -= sizeof (struct udp_packet);
- dns = (const struct dns_header*) &udp[1];
+ msize -= sizeof (struct GNUNET_TUN_UdpHeader);
+ dns = (const struct GNUNET_TUN_DnsHeader*) &udp[1];
rr = &requests[dns->id];
/* clean up from previous request */
* Skeleton of the TCP header to send. Port numbers are to
* be replaced and the checksum may be updated as necessary.
*/
- struct tcp_packet tcp_header;
+ struct GNUNET_TUN_TcpHeader tcp_header;
/* followed by TCP payload */
};
* Skeleton of the TCP header to send. Port numbers are to
* be replaced and the checksum may be updated as necessary.
*/
- struct tcp_packet tcp_header;
+ struct GNUNET_TUN_TcpHeader tcp_header;
/* followed by IP address of the destination; either
'struct in_addr' or 'struct in6_addr', depending on af */
* Skeleton of the TCP header to send. Port numbers are to
* be replaced and the checksum may be updated as necessary. (The destination port number should not be changed, as it contains the desired destination port.)
*/
- struct tcp_packet tcp_header;
+ struct GNUNET_TUN_TcpHeader tcp_header;
/* followed by TCP payload */
};
* be the original destination address)
*/
static void
-udp_from_helper (const struct udp_packet *udp,
+udp_from_helper (const struct GNUNET_TUN_UdpHeader *udp,
size_t pktlen,
int af,
const void *destination_ip,
dbuf, sizeof (dbuf)),
(unsigned int) ntohs (udp->dpt));
}
- if (pktlen < sizeof (struct udp_packet))
+ if (pktlen < sizeof (struct GNUNET_TUN_UdpHeader))
{
/* blame kernel */
GNUNET_break (0);
return;
}
send_packet_to_mesh_tunnel (state->tunnel,
- &udp[1], pktlen - sizeof (struct udp_packet),
+ &udp[1], pktlen - sizeof (struct GNUNET_TUN_UdpHeader),
NULL,
state->serv != NULL
? GNUNET_MESSAGE_TYPE_VPN_SERVICE_UDP_BACK
* be the original destination address)
*/
static void
-tcp_from_helper (const struct tcp_packet *tcp,
+tcp_from_helper (const struct GNUNET_TUN_TcpHeader *tcp,
size_t pktlen,
int af,
const void *destination_ip,
{
struct TunnelState *state;
char buf[pktlen];
- struct tcp_packet *mtcp;
+ struct GNUNET_TUN_TcpHeader *mtcp;
{
char sbuf[INET6_ADDRSTRLEN];
dbuf, sizeof (dbuf)),
(unsigned int) ntohs (tcp->dpt));
}
- if (pktlen < sizeof (struct tcp_packet))
+ if (pktlen < sizeof (struct GNUNET_TUN_TcpHeader))
{
/* blame kernel */
GNUNET_break (0);
/* mug port numbers and crc to avoid information leakage;
sender will need to lookup the correct values anyway */
memcpy (buf, tcp, pktlen);
- mtcp = (struct tcp_packet *) buf;
+ mtcp = (struct GNUNET_TUN_TcpHeader *) buf;
mtcp->spt = 0;
mtcp->dpt = 0;
mtcp->crc = 0;
message_token (void *cls GNUNET_UNUSED, void *client GNUNET_UNUSED,
const struct GNUNET_MessageHeader *message)
{
- const struct tun_header *pkt_tun;
+ const struct GNUNET_TUN_Layer2PacketHeader *pkt_tun;
size_t size;
GNUNET_STATISTICS_update (stats,
return;
}
size = ntohs (message->size);
- if (size < sizeof (struct tun_header) + sizeof (struct GNUNET_MessageHeader))
+ if (size < sizeof (struct GNUNET_TUN_Layer2PacketHeader) + sizeof (struct GNUNET_MessageHeader))
{
GNUNET_break (0);
return;
GNUNET_STATISTICS_update (stats,
gettext_noop ("# Bytes received from TUN"),
size, GNUNET_NO);
- pkt_tun = (const struct tun_header *) &message[1];
- size -= sizeof (struct tun_header) + sizeof (struct GNUNET_MessageHeader);
+ pkt_tun = (const struct GNUNET_TUN_Layer2PacketHeader *) &message[1];
+ size -= sizeof (struct GNUNET_TUN_Layer2PacketHeader) + sizeof (struct GNUNET_MessageHeader);
switch (ntohs (pkt_tun->proto))
{
case ETH_P_IPV6:
{
- const struct ip6_header *pkt6;
+ const struct GNUNET_TUN_IPv6Header *pkt6;
- if (size < sizeof (struct ip6_header))
+ if (size < sizeof (struct GNUNET_TUN_IPv6Header))
{
/* Kernel to blame? */
GNUNET_break (0);
return;
}
- pkt6 = (struct ip6_header *) &pkt_tun[1];
+ pkt6 = (struct GNUNET_TUN_IPv6Header *) &pkt_tun[1];
if (size != ntohs (pkt6->payload_length))
{
/* Kernel to blame? */
GNUNET_break (0);
return;
}
- size -= sizeof (struct ip6_header);
+ size -= sizeof (struct GNUNET_TUN_IPv6Header);
switch (pkt6->next_header)
{
case IPPROTO_UDP:
- udp_from_helper ((const struct udp_packet *) &pkt6[1], size,
+ udp_from_helper ((const struct GNUNET_TUN_UdpHeader *) &pkt6[1], size,
AF_INET6,
&pkt6->destination_address,
&pkt6->source_address);
break;
case IPPROTO_TCP:
- tcp_from_helper ((const struct tcp_packet *) &pkt6[1], size,
+ tcp_from_helper ((const struct GNUNET_TUN_TcpHeader *) &pkt6[1], size,
AF_INET6,
&pkt6->destination_address,
&pkt6->source_address);
break;
case ETH_P_IPV4:
{
- const struct ip4_header *pkt4;
+ const struct GNUNET_TUN_IPv4Header *pkt4;
- if (size < sizeof (struct ip4_header))
+ if (size < sizeof (struct GNUNET_TUN_IPv4Header))
{
/* Kernel to blame? */
GNUNET_break (0);
return;
}
- pkt4 = (const struct ip4_header *) &pkt_tun[1];
+ pkt4 = (const struct GNUNET_TUN_IPv4Header *) &pkt_tun[1];
if (size != ntohs (pkt4->total_length))
{
/* Kernel to blame? */
GNUNET_break (0);
return;
}
- if (pkt4->header_length * 4 != sizeof (struct ip4_header))
+ if (pkt4->header_length * 4 != sizeof (struct GNUNET_TUN_IPv4Header))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("IPv4 packet options received. Ignored.\n"));
return;
}
- size -= sizeof (struct ip4_header);
+ size -= sizeof (struct GNUNET_TUN_IPv4Header);
switch (pkt4->protocol)
{
case IPPROTO_UDP:
- udp_from_helper ((const struct udp_packet *) &pkt4[1], size,
+ udp_from_helper ((const struct GNUNET_TUN_UdpHeader *) &pkt4[1], size,
AF_INET,
&pkt4->destination_address,
&pkt4->source_address);
case IPPROTO_TCP:
- tcp_from_helper ((const struct tcp_packet *) &pkt4[1], size,
+ tcp_from_helper ((const struct GNUNET_TUN_TcpHeader *) &pkt4[1], size,
AF_INET,
&pkt4->destination_address,
&pkt4->source_address);
static void
prepare_ipv4_packet (const void *payload, size_t payload_length,
int protocol,
- const struct tcp_packet *tcp_header,
+ const struct GNUNET_TUN_TcpHeader *tcp_header,
const struct SocketAddress *src_address,
const struct SocketAddress *dst_address,
- struct ip4_header *pkt4)
+ struct GNUNET_TUN_IPv4Header *pkt4)
{
size_t len;
switch (protocol)
{
case IPPROTO_UDP:
- len += sizeof (struct udp_packet);
+ len += sizeof (struct GNUNET_TUN_UdpHeader);
break;
case IPPROTO_TCP:
- len += sizeof (struct tcp_packet);
+ len += sizeof (struct GNUNET_TUN_TcpHeader);
GNUNET_assert (NULL != tcp_header);
break;
default:
GNUNET_break (0);
return;
}
- if (len + sizeof (struct ip4_header) > UINT16_MAX)
+ if (len + sizeof (struct GNUNET_TUN_IPv4Header) > UINT16_MAX)
{
GNUNET_break (0);
return;
}
pkt4->version = 4;
- pkt4->header_length = sizeof (struct ip4_header) / 4;
+ pkt4->header_length = sizeof (struct GNUNET_TUN_IPv4Header) / 4;
pkt4->diff_serv = 0;
- pkt4->total_length = htons ((uint16_t) (sizeof (struct ip4_header) + len));
+ pkt4->total_length = htons ((uint16_t) (sizeof (struct GNUNET_TUN_IPv4Header) + len));
pkt4->identification = (uint16_t) GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
UINT16_MAX + 1);
pkt4->flags = 0;
pkt4->checksum = 0;
pkt4->destination_address = dst_address->address.ipv4;
pkt4->source_address = src_address->address.ipv4;
- pkt4->checksum = GNUNET_CRYPTO_crc16_n (pkt4, sizeof (struct ip4_header));
+ pkt4->checksum = GNUNET_CRYPTO_crc16_n (pkt4, sizeof (struct GNUNET_TUN_IPv4Header));
switch (protocol)
{
case IPPROTO_UDP:
{
- struct udp_packet *pkt4_udp = (struct udp_packet *) &pkt4[1];
+ struct GNUNET_TUN_UdpHeader *pkt4_udp = (struct GNUNET_TUN_UdpHeader *) &pkt4[1];
pkt4_udp->spt = htons (src_address->port);
pkt4_udp->dpt = htons (dst_address->port);
break;
case IPPROTO_TCP:
{
- struct tcp_packet *pkt4_tcp = (struct tcp_packet *) &pkt4[1];
+ struct GNUNET_TUN_TcpHeader *pkt4_tcp = (struct GNUNET_TUN_TcpHeader *) &pkt4[1];
- memcpy (pkt4_tcp, tcp_header, sizeof (struct tcp_packet));
+ memcpy (pkt4_tcp, tcp_header, sizeof (struct GNUNET_TUN_TcpHeader));
memcpy (&pkt4_tcp[1], payload, payload_length);
pkt4_tcp->spt = htons (src_address->port);
pkt4_tcp->dpt = htons (dst_address->port);
static void
prepare_ipv6_packet (const void *payload, size_t payload_length,
int protocol,
- const struct tcp_packet *tcp_header,
+ const struct GNUNET_TUN_TcpHeader *tcp_header,
const struct SocketAddress *src_address,
const struct SocketAddress *dst_address,
- struct ip6_header *pkt6)
+ struct GNUNET_TUN_IPv6Header *pkt6)
{
size_t len;
switch (protocol)
{
case IPPROTO_UDP:
- len += sizeof (struct udp_packet);
+ len += sizeof (struct GNUNET_TUN_UdpHeader);
break;
case IPPROTO_TCP:
/* tcp_header (with port/crc not set) must be part of payload! */
- if (len < sizeof (struct tcp_packet))
+ if (len < sizeof (struct GNUNET_TUN_TcpHeader))
{
GNUNET_break (0);
return;
pkt6->version = 6;
pkt6->next_header = protocol;
- pkt6->payload_length = htons ((uint16_t) (len + sizeof (struct ip6_header)));
+ pkt6->payload_length = htons ((uint16_t) (len + sizeof (struct GNUNET_TUN_IPv6Header)));
pkt6->hop_limit = 255;
pkt6->destination_address = dst_address->address.ipv6;
pkt6->source_address = src_address->address.ipv6;
{
case IPPROTO_UDP:
{
- struct udp_packet *pkt6_udp = (struct udp_packet *) &pkt6[1];
+ struct GNUNET_TUN_UdpHeader *pkt6_udp = (struct GNUNET_TUN_UdpHeader *) &pkt6[1];
memcpy (&pkt6[1], payload, payload_length);
pkt6_udp->crc = 0;
break;
case IPPROTO_TCP:
{
- struct tcp_packet *pkt6_tcp = (struct tcp_packet *) pkt6;
+ struct GNUNET_TUN_TcpHeader *pkt6_tcp = (struct GNUNET_TUN_TcpHeader *) pkt6;
memcpy (pkt6_tcp, payload, payload_length);
pkt6_tcp->crc = 0;
static void
send_tcp_packet_via_tun (const struct SocketAddress *destination_address,
const struct SocketAddress *source_address,
- const struct tcp_packet *tcp_header,
+ const struct GNUNET_TUN_TcpHeader *tcp_header,
const void *payload, size_t payload_length)
{
size_t len;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Sending packet with %u bytes TCP payload via TUN\n",
(unsigned int) payload_length);
- len = sizeof (struct GNUNET_MessageHeader) + sizeof (struct tun_header);
+ len = sizeof (struct GNUNET_MessageHeader) + sizeof (struct GNUNET_TUN_Layer2PacketHeader);
switch (source_address->af)
{
case AF_INET:
- len += sizeof (struct ip4_header);
+ len += sizeof (struct GNUNET_TUN_IPv4Header);
break;
case AF_INET6:
- len += sizeof (struct ip6_header);
+ len += sizeof (struct GNUNET_TUN_IPv6Header);
break;
default:
GNUNET_break (0);
{
char buf[len];
struct GNUNET_MessageHeader *hdr;
- struct tun_header *tun;
+ struct GNUNET_TUN_Layer2PacketHeader *tun;
hdr= (struct GNUNET_MessageHeader *) buf;
hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_HELPER);
hdr->size = htons (len);
- tun = (struct tun_header*) &hdr[1];
+ tun = (struct GNUNET_TUN_Layer2PacketHeader*) &hdr[1];
tun->flags = htons (0);
switch (source_address->af)
{
case AF_INET:
{
- struct ip4_header * ipv4 = (struct ip4_header*) &tun[1];
+ struct GNUNET_TUN_IPv4Header * ipv4 = (struct GNUNET_TUN_IPv4Header*) &tun[1];
tun->proto = htons (ETH_P_IPV4);
prepare_ipv4_packet (payload, payload_length,
break;
case AF_INET6:
{
- struct ip6_header * ipv6 = (struct ip6_header*) &tun[1];
+ struct GNUNET_TUN_IPv6Header * ipv6 = (struct GNUNET_TUN_IPv6Header*) &tun[1];
tun->proto = htons (ETH_P_IPV6);
prepare_ipv6_packet (payload, payload_length,
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Sending packet with %u bytes UDP payload via TUN\n",
(unsigned int) payload_length);
- len = sizeof (struct GNUNET_MessageHeader) + sizeof (struct tun_header);
+ len = sizeof (struct GNUNET_MessageHeader) + sizeof (struct GNUNET_TUN_Layer2PacketHeader);
switch (source_address->af)
{
case AF_INET:
- len += sizeof (struct ip4_header);
+ len += sizeof (struct GNUNET_TUN_IPv4Header);
break;
case AF_INET6:
- len += sizeof (struct ip6_header);
+ len += sizeof (struct GNUNET_TUN_IPv6Header);
break;
default:
GNUNET_break (0);
return;
}
- len += sizeof (struct udp_packet);
+ len += sizeof (struct GNUNET_TUN_UdpHeader);
len += payload_length;
if (len >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
{
char buf[len];
struct GNUNET_MessageHeader *hdr;
- struct tun_header *tun;
+ struct GNUNET_TUN_Layer2PacketHeader *tun;
hdr= (struct GNUNET_MessageHeader *) buf;
hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_HELPER);
hdr->size = htons (len);
- tun = (struct tun_header*) &hdr[1];
+ tun = (struct GNUNET_TUN_Layer2PacketHeader*) &hdr[1];
tun->flags = htons (0);
switch (source_address->af)
{
case AF_INET:
{
- struct ip4_header * ipv4 = (struct ip4_header*) &tun[1];
+ struct GNUNET_TUN_IPv4Header * ipv4 = (struct GNUNET_TUN_IPv4Header*) &tun[1];
tun->proto = htons (ETH_P_IPV4);
prepare_ipv4_packet (payload, payload_length,
break;
case AF_INET6:
{
- struct ip6_header * ipv6 = (struct ip6_header*) &tun[1];
+ struct GNUNET_TUN_IPv6Header * ipv6 = (struct GNUNET_TUN_IPv6Header*) &tun[1];
tun->proto = htons (ETH_P_IPV6);
prepare_ipv6_packet (payload, payload_length,
* @brief standard TCP/IP network structs and IP checksum calculations for TUN interaction
* @author Philipp Toelke
* @author Christian Grothoff
- *
- * TODO:
- * - currently does not follow our naming conventions
*/
-#ifndef TCPIP_TUN_H
-#define TCPIP_TUN_H
+#ifndef GNUNET_TUN_LIB_H
+#define GNUNET_TUN_LIB_H
-#include "platform.h"
#include "gnunet_util_lib.h"
/* see http://www.iana.org/assignments/ethernet-numbers */
#ifndef ETH_P_IPV4
+/**
+ * Number for IPv4
+ */
#define ETH_P_IPV4 0x0800
#endif
#ifndef ETH_P_IPV6
+/**
+ * Number for IPv6
+ */
#define ETH_P_IPV6 0x86DD
#endif
GNUNET_NETWORK_STRUCT_BEGIN
+
/**
* Header from Linux TUN interface.
*/
-struct tun_header
+struct GNUNET_TUN_Layer2PacketHeader
{
/**
* Some flags (unused).
/**
* Standard IPv4 header.
*/
-struct ip4_header
+struct GNUNET_TUN_IPv4Header
{
unsigned header_length:4 GNUNET_PACKED;
unsigned version:4 GNUNET_PACKED;
struct in_addr destination_address GNUNET_PACKED;
};
+
/**
* Standard IPv6 header.
*/
-struct ip6_header
+struct GNUNET_TUN_IPv6Header
{
unsigned traffic_class_h:4 GNUNET_PACKED;
unsigned version:4 GNUNET_PACKED;
struct in6_addr destination_address GNUNET_PACKED;
};
-#define TCP_FLAG_SYN 2
/**
* TCP packet header (FIXME: rename!)
*/
-struct tcp_packet
+struct GNUNET_TUN_TcpHeader
{
unsigned spt:16 GNUNET_PACKED;
unsigned dpt:16 GNUNET_PACKED;
unsigned urg:16 GNUNET_PACKED;
};
+
/**
* UDP packet header (FIXME: rename!)
*/
-struct udp_packet
+struct GNUNET_TUN_UdpHeader
{
uint16_t spt GNUNET_PACKED;
uint16_t dpt GNUNET_PACKED;
uint16_t crc GNUNET_PACKED;
};
+
/**
* DNS header.
*/
-struct dns_header
+struct GNUNET_TUN_DnsHeader
{
uint16_t id GNUNET_PACKED;
uint16_t flags GNUNET_PACKED;
uint16_t nscount GNUNET_PACKED;
uint16_t arcount GNUNET_PACKED;
};
-GNUNET_NETWORK_STRUCT_END
-
-
-
-
-
+GNUNET_NETWORK_STRUCT_END
#endif
tun.c
libgnunettun_la_LIBADD = \
$(top_builddir)/src/util/libgnunetutil.la $(XLIB)
-libgnunethello_la_LDFLAGS = \
+libgnunettun_la_LDFLAGS = \
$(GN_LIB_LDFLAGS)
size_t alen;
size_t mlen;
int is_new;
- const struct udp_packet *udp;
- const struct tcp_packet *tcp;
+ const struct GNUNET_TUN_UdpHeader *udp;
+ const struct GNUNET_TUN_TcpHeader *tcp;
uint16_t spt;
uint16_t dpt;
{
case IPPROTO_UDP:
{
- if (payload_length < sizeof (struct udp_packet))
+ if (payload_length < sizeof (struct GNUNET_TUN_UdpHeader))
{
/* blame kernel? */
GNUNET_break (0);
break;
case IPPROTO_TCP:
{
- if (payload_length < sizeof (struct tcp_packet))
+ if (payload_length < sizeof (struct GNUNET_TUN_TcpHeader))
{
/* blame kernel? */
GNUNET_break (0);
struct GNUNET_EXIT_UdpServiceMessage *usm;
mlen = sizeof (struct GNUNET_EXIT_UdpServiceMessage) +
- payload_length - sizeof (struct udp_packet);
+ payload_length - sizeof (struct GNUNET_TUN_UdpHeader);
if (mlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
GNUNET_break (0);
usm->service_descriptor = destination->details.service_destination.service_descriptor;
memcpy (&usm[1],
&udp[1],
- payload_length - sizeof (struct udp_packet));
+ payload_length - sizeof (struct GNUNET_TUN_UdpHeader));
}
else
{
void *payload;
mlen = sizeof (struct GNUNET_EXIT_UdpInternetMessage) +
- alen + payload_length - sizeof (struct udp_packet);
+ alen + payload_length - sizeof (struct GNUNET_TUN_UdpHeader);
if (mlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
GNUNET_break (0);
}
memcpy (payload,
&udp[1],
- payload_length - sizeof (struct udp_packet));
+ payload_length - sizeof (struct GNUNET_TUN_UdpHeader));
}
break;
case IPPROTO_TCP:
struct GNUNET_EXIT_TcpServiceStartMessage *tsm;
mlen = sizeof (struct GNUNET_EXIT_TcpServiceStartMessage) +
- payload_length - sizeof (struct tcp_packet);
+ payload_length - sizeof (struct GNUNET_TUN_TcpHeader);
if (mlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
GNUNET_break (0);
tsm->tcp_header = *tcp;
memcpy (&tsm[1],
&tcp[1],
- payload_length - sizeof (struct tcp_packet));
+ payload_length - sizeof (struct GNUNET_TUN_TcpHeader));
}
else
{
void *payload;
mlen = sizeof (struct GNUNET_EXIT_TcpInternetStartMessage) +
- alen + payload_length - sizeof (struct tcp_packet);
+ alen + payload_length - sizeof (struct GNUNET_TUN_TcpHeader);
if (mlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
GNUNET_break (0);
}
memcpy (payload,
&tcp[1],
- payload_length - sizeof (struct tcp_packet));
+ payload_length - sizeof (struct GNUNET_TUN_TcpHeader));
}
}
else
struct GNUNET_EXIT_TcpDataMessage *tdm;
mlen = sizeof (struct GNUNET_EXIT_TcpDataMessage) +
- alen + payload_length - sizeof (struct tcp_packet);
+ alen + payload_length - sizeof (struct GNUNET_TUN_TcpHeader);
if (mlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
GNUNET_break (0);
tdm->tcp_header = *tcp;
memcpy (&tdm[1],
&tcp[1],
- payload_length - sizeof (struct tcp_packet));
+ payload_length - sizeof (struct GNUNET_TUN_TcpHeader));
}
break;
default:
message_token (void *cls GNUNET_UNUSED, void *client GNUNET_UNUSED,
const struct GNUNET_MessageHeader *message)
{
- const struct tun_header *tun;
+ const struct GNUNET_TUN_Layer2PacketHeader *tun;
size_t mlen;
GNUNET_HashCode key;
struct DestinationEntry *de;
1, GNUNET_NO);
mlen = ntohs (message->size);
if ( (ntohs (message->type) != GNUNET_MESSAGE_TYPE_VPN_HELPER) ||
- (mlen < sizeof (struct GNUNET_MessageHeader) + sizeof (struct tun_header)) )
+ (mlen < sizeof (struct GNUNET_MessageHeader) + sizeof (struct GNUNET_TUN_Layer2PacketHeader)) )
{
GNUNET_break (0);
return;
}
- tun = (const struct tun_header *) &message[1];
- mlen -= (sizeof (struct GNUNET_MessageHeader) + sizeof (struct tun_header));
+ tun = (const struct GNUNET_TUN_Layer2PacketHeader *) &message[1];
+ mlen -= (sizeof (struct GNUNET_MessageHeader) + sizeof (struct GNUNET_TUN_Layer2PacketHeader));
switch (ntohs (tun->proto))
{
case ETH_P_IPV6:
{
- const struct ip6_header *pkt6;
+ const struct GNUNET_TUN_IPv6Header *pkt6;
- if (mlen < sizeof (struct ip6_header))
+ if (mlen < sizeof (struct GNUNET_TUN_IPv6Header))
{
/* blame kernel */
GNUNET_break (0);
return;
}
- pkt6 = (const struct ip6_header *) &tun[1];
+ pkt6 = (const struct GNUNET_TUN_IPv6Header *) &tun[1];
get_destination_key_from_ip (AF_INET6,
&pkt6->destination_address,
&key);
&pkt6->source_address,
&pkt6->destination_address,
&pkt6[1],
- mlen - sizeof (struct ip6_header));
+ mlen - sizeof (struct GNUNET_TUN_IPv6Header));
}
break;
case ETH_P_IPV4:
{
- struct ip4_header *pkt4;
+ struct GNUNET_TUN_IPv4Header *pkt4;
- if (mlen < sizeof (struct ip4_header))
+ if (mlen < sizeof (struct GNUNET_TUN_IPv4Header))
{
/* blame kernel */
GNUNET_break (0);
return;
}
- pkt4 = (struct ip4_header *) &tun[1];
+ pkt4 = (struct GNUNET_TUN_IPv4Header *) &tun[1];
get_destination_key_from_ip (AF_INET,
&pkt4->destination_address,
&key);
sizeof (buf)));
return;
}
- if (pkt4->header_length * 4 != sizeof (struct ip4_header))
+ if (pkt4->header_length * 4 != sizeof (struct GNUNET_TUN_IPv4Header))
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Received IPv4 packet with options (dropping it)\n"));
&pkt4->source_address,
&pkt4->destination_address,
&pkt4[1],
- mlen - sizeof (struct ip4_header));
+ mlen - sizeof (struct GNUNET_TUN_IPv4Header));
}
break;
default:
{
case AF_INET:
{
- size_t size = sizeof (struct ip4_header)
- + sizeof (struct udp_packet)
+ size_t size = sizeof (struct GNUNET_TUN_IPv4Header)
+ + sizeof (struct GNUNET_TUN_UdpHeader)
+ sizeof (struct GNUNET_MessageHeader) +
- sizeof (struct tun_header) +
+ sizeof (struct GNUNET_TUN_Layer2PacketHeader) +
mlen;
{
char buf[size];
struct GNUNET_MessageHeader *msg = (struct GNUNET_MessageHeader *) buf;
- struct tun_header *tun = (struct tun_header*) &msg[1];
- struct ip4_header *ipv4 = (struct ip4_header *) &tun[1];
- struct udp_packet *udp = (struct udp_packet *) &ipv4[1];
+ struct GNUNET_TUN_Layer2PacketHeader *tun = (struct GNUNET_TUN_Layer2PacketHeader*) &msg[1];
+ struct GNUNET_TUN_IPv4Header *ipv4 = (struct GNUNET_TUN_IPv4Header *) &tun[1];
+ struct GNUNET_TUN_UdpHeader *udp = (struct GNUNET_TUN_UdpHeader *) &ipv4[1];
msg->type = htons (GNUNET_MESSAGE_TYPE_VPN_HELPER);
msg->size = htons (size);
tun->flags = htons (0);
tun->proto = htons (ETH_P_IPV4);
ipv4->version = 4;
- ipv4->header_length = sizeof (struct ip4_header) / 4;
+ ipv4->header_length = sizeof (struct GNUNET_TUN_IPv4Header) / 4;
ipv4->diff_serv = 0;
- ipv4->total_length = htons (sizeof (struct ip4_header) +
- sizeof (struct udp_packet) +
+ ipv4->total_length = htons (sizeof (struct GNUNET_TUN_IPv4Header) +
+ sizeof (struct GNUNET_TUN_UdpHeader) +
mlen);
ipv4->identification = (uint16_t) GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
UINT16_MAX + 1);
ipv4->source_address = ts->destination_ip.v4;
ipv4->destination_address = ts->source_ip.v4;
ipv4->checksum =
- GNUNET_CRYPTO_crc16_n (ipv4, sizeof (struct ip4_header));
+ GNUNET_CRYPTO_crc16_n (ipv4, sizeof (struct GNUNET_TUN_IPv4Header));
if (0 == ntohs (reply->source_port))
udp->spt = htons (ts->destination_port);
else
udp->dpt = htons (ts->source_port);
else
udp->dpt = reply->destination_port;
- udp->len = htons (mlen + sizeof (struct udp_packet));
+ udp->len = htons (mlen + sizeof (struct GNUNET_TUN_UdpHeader));
udp->crc = 0; // FIXME: optional, but we might want to calculate this one anyway
memcpy (&udp[1],
&reply[1],
break;
case AF_INET6:
{
- size_t size = sizeof (struct ip6_header)
- + sizeof (struct udp_packet)
+ size_t size = sizeof (struct GNUNET_TUN_IPv6Header)
+ + sizeof (struct GNUNET_TUN_UdpHeader)
+ sizeof (struct GNUNET_MessageHeader) +
- sizeof (struct tun_header) +
+ sizeof (struct GNUNET_TUN_Layer2PacketHeader) +
mlen;
{
char buf[size];
struct GNUNET_MessageHeader *msg = (struct GNUNET_MessageHeader *) buf;
- struct tun_header *tun = (struct tun_header*) &msg[1];
- struct ip6_header *ipv6 = (struct ip6_header *) &tun[1];
- struct udp_packet *udp = (struct udp_packet *) &ipv6[1];
+ struct GNUNET_TUN_Layer2PacketHeader *tun = (struct GNUNET_TUN_Layer2PacketHeader*) &msg[1];
+ struct GNUNET_TUN_IPv6Header *ipv6 = (struct GNUNET_TUN_IPv6Header *) &tun[1];
+ struct GNUNET_TUN_UdpHeader *udp = (struct GNUNET_TUN_UdpHeader *) &ipv6[1];
msg->type = htons (GNUNET_MESSAGE_TYPE_VPN_HELPER);
msg->size = htons (size);
tun->flags = htons (0);
ipv6->version = 6;
ipv6->traffic_class_l = 0;
ipv6->flow_label = 0;
- ipv6->payload_length = htons (sizeof (struct udp_packet) + sizeof (struct ip6_header) + mlen);
+ ipv6->payload_length = htons (sizeof (struct GNUNET_TUN_UdpHeader) + sizeof (struct GNUNET_TUN_IPv6Header) + mlen);
ipv6->next_header = IPPROTO_UDP;
ipv6->hop_limit = 255;
ipv6->source_address = ts->destination_ip.v6;
udp->dpt = htons (ts->source_port);
else
udp->dpt = reply->destination_port;
- udp->len = htons (mlen + sizeof (struct udp_packet));
+ udp->len = htons (mlen + sizeof (struct GNUNET_TUN_UdpHeader));
udp->crc = 0;
memcpy (&udp[1],
&reply[1],
{
case AF_INET:
{
- size_t size = sizeof (struct ip4_header)
- + sizeof (struct tcp_packet)
+ size_t size = sizeof (struct GNUNET_TUN_IPv4Header)
+ + sizeof (struct GNUNET_TUN_TcpHeader)
+ sizeof (struct GNUNET_MessageHeader) +
- sizeof (struct tun_header) +
+ sizeof (struct GNUNET_TUN_Layer2PacketHeader) +
mlen;
{
char buf[size];
struct GNUNET_MessageHeader *msg = (struct GNUNET_MessageHeader *) buf;
- struct tun_header *tun = (struct tun_header*) &msg[1];
- struct ip4_header *ipv4 = (struct ip4_header *) &tun[1];
- struct tcp_packet *tcp = (struct tcp_packet *) &ipv4[1];
+ struct GNUNET_TUN_Layer2PacketHeader *tun = (struct GNUNET_TUN_Layer2PacketHeader*) &msg[1];
+ struct GNUNET_TUN_IPv4Header *ipv4 = (struct GNUNET_TUN_IPv4Header *) &tun[1];
+ struct GNUNET_TUN_TcpHeader *tcp = (struct GNUNET_TUN_TcpHeader *) &ipv4[1];
msg->type = htons (GNUNET_MESSAGE_TYPE_VPN_HELPER);
msg->size = htons (size);
tun->flags = htons (0);
tun->proto = htons (ETH_P_IPV4);
ipv4->version = 4;
- ipv4->header_length = sizeof (struct ip4_header) / 4;
+ ipv4->header_length = sizeof (struct GNUNET_TUN_IPv4Header) / 4;
ipv4->diff_serv = 0;
- ipv4->total_length = htons (sizeof (struct ip4_header) +
- sizeof (struct tcp_packet) +
+ ipv4->total_length = htons (sizeof (struct GNUNET_TUN_IPv4Header) +
+ sizeof (struct GNUNET_TUN_TcpHeader) +
mlen);
ipv4->identification = (uint16_t) GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
UINT16_MAX + 1);
ipv4->source_address = ts->destination_ip.v4;
ipv4->destination_address = ts->source_ip.v4;
ipv4->checksum =
- GNUNET_CRYPTO_crc16_n (ipv4, sizeof (struct ip4_header));
+ GNUNET_CRYPTO_crc16_n (ipv4, sizeof (struct GNUNET_TUN_IPv4Header));
*tcp = data->tcp_header;
tcp->spt = htons (ts->destination_port);
tcp->dpt = htons (ts->source_port);
sum = GNUNET_CRYPTO_crc16_step (sum,
&ipv4->source_address,
2 * sizeof (struct in_addr));
- tmp = htonl ((IPPROTO_TCP << 16) | (mlen + sizeof (struct tcp_packet)));
+ tmp = htonl ((IPPROTO_TCP << 16) | (mlen + sizeof (struct GNUNET_TUN_TcpHeader)));
sum = GNUNET_CRYPTO_crc16_step (sum, &tmp, sizeof (uint32_t));
- sum = GNUNET_CRYPTO_crc16_step (sum, tcp, mlen + sizeof (struct tcp_packet));
+ sum = GNUNET_CRYPTO_crc16_step (sum, tcp, mlen + sizeof (struct GNUNET_TUN_TcpHeader));
tcp->crc = GNUNET_CRYPTO_crc16_finish (sum);
}
(void) GNUNET_HELPER_send (helper_handle,
break;
case AF_INET6:
{
- size_t size = sizeof (struct ip6_header)
- + sizeof (struct tcp_packet)
+ size_t size = sizeof (struct GNUNET_TUN_IPv6Header)
+ + sizeof (struct GNUNET_TUN_TcpHeader)
+ sizeof (struct GNUNET_MessageHeader) +
- sizeof (struct tun_header) +
+ sizeof (struct GNUNET_TUN_Layer2PacketHeader) +
mlen;
{
char buf[size];
struct GNUNET_MessageHeader *msg = (struct GNUNET_MessageHeader *) buf;
- struct tun_header *tun = (struct tun_header*) &msg[1];
- struct ip6_header *ipv6 = (struct ip6_header *) &tun[1];
- struct tcp_packet *tcp = (struct tcp_packet *) &ipv6[1];
+ struct GNUNET_TUN_Layer2PacketHeader *tun = (struct GNUNET_TUN_Layer2PacketHeader*) &msg[1];
+ struct GNUNET_TUN_IPv6Header *ipv6 = (struct GNUNET_TUN_IPv6Header *) &tun[1];
+ struct GNUNET_TUN_TcpHeader *tcp = (struct GNUNET_TUN_TcpHeader *) &ipv6[1];
msg->type = htons (GNUNET_MESSAGE_TYPE_VPN_HELPER);
msg->size = htons (size);
tun->flags = htons (0);
ipv6->version = 6;
ipv6->traffic_class_l = 0;
ipv6->flow_label = 0;
- ipv6->payload_length = htons (sizeof (struct tcp_packet) + sizeof (struct ip6_header) + mlen);
+ ipv6->payload_length = htons (sizeof (struct GNUNET_TUN_TcpHeader) + sizeof (struct GNUNET_TUN_IPv6Header) + mlen);
ipv6->next_header = IPPROTO_TCP;
ipv6->hop_limit = 255;
ipv6->source_address = ts->destination_ip.v6;
uint32_t tmp;
sum = GNUNET_CRYPTO_crc16_step (sum, &ipv6->source_address, 2 * sizeof (struct in6_addr));
- tmp = htonl (sizeof (struct tcp_packet) + mlen);
+ tmp = htonl (sizeof (struct GNUNET_TUN_TcpHeader) + mlen);
sum = GNUNET_CRYPTO_crc16_step (sum, &tmp, sizeof (uint32_t));
tmp = htonl (IPPROTO_TCP);
sum = GNUNET_CRYPTO_crc16_step (sum, &tmp, sizeof (uint32_t));
sum = GNUNET_CRYPTO_crc16_step (sum, tcp,
- sizeof (struct tcp_packet) + mlen);
+ sizeof (struct GNUNET_TUN_TcpHeader) + mlen);
tcp->crc = GNUNET_CRYPTO_crc16_finish (sum);
}
(void) GNUNET_HELPER_send (helper_handle,
projects / oweals / gnunet.git / commitdiff