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Moved socket and socket-raw implementations to plugins

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This commit is contained in:
Martin Willi
2010-02-26 11:44:32 +01:00
parent c711687c00
commit dab0560497
17 changed files with 733 additions and 167 deletions
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src/charon/network/socket-raw.c
-761
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@@ -1,761 +0,0 @@
/*
* Copyright (C) 2006 Tobias Brunner, Daniel Roethlisberger
* Copyright (C) 2005-2008 Martin Willi
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
/* for struct in6_pktinfo */
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/udp.h>
#include <linux/types.h>
#include <linux/filter.h>
#include <net/if.h>
#include "socket.h"
#include <daemon.h>
#include <threading/thread.h>
/* constants for packet handling */
#define IP_LEN sizeof(struct iphdr)
#define IP6_LEN sizeof(struct ip6_hdr)
#define UDP_LEN sizeof(struct udphdr)
#define MARKER_LEN sizeof(u_int32_t)
/* offsets for packet handling */
#define IP_PROTO_OFFSET 9
#define IP6_PROTO_OFFSET 6
#define IKE_VERSION_OFFSET 17
#define IKE_LENGTH_OFFSET 24
/* from linux/udp.h */
#ifndef UDP_ENCAP
#define UDP_ENCAP 100
#endif /*UDP_ENCAP*/
#ifndef UDP_ENCAP_ESPINUDP
#define UDP_ENCAP_ESPINUDP 2
#endif /*UDP_ENCAP_ESPINUDP*/
/* needed for older kernel headers */
#ifndef IPV6_2292PKTINFO
#define IPV6_2292PKTINFO 2
#endif /*IPV6_2292PKTINFO*/
typedef struct private_socket_t private_socket_t;
/**
* Private data of an socket_t object
*/
struct private_socket_t{
/**
* public functions
*/
socket_t public;
/**
* regular port
*/
int port;
/**
* port used for nat-t
*/
int natt_port;
/**
* raw receiver socket for IPv4
*/
int recv4;
/**
* raw receiver socket for IPv6
*/
int recv6;
/**
* send socket on regular port for IPv4
*/
int send4;
/**
* send socket on regular port for IPv6
*/
int send6;
/**
* send socket on nat-t port for IPv4
*/
int send4_natt;
/**
* send socket on nat-t port for IPv6
*/
int send6_natt;
};
/**
* implementation of socket_t.receive
*/
static status_t receiver(private_socket_t *this, packet_t **packet)
{
char buffer[MAX_PACKET];
chunk_t data;
packet_t *pkt;
struct udphdr *udp;
host_t *source = NULL, *dest = NULL;
int bytes_read = 0, data_offset;
bool oldstate;
fd_set rfds;
FD_ZERO(&rfds);
if (this->recv4)
{
FD_SET(this->recv4, &rfds);
}
if (this->recv6)
{
FD_SET(this->recv6, &rfds);
}
DBG2(DBG_NET, "waiting for data on raw sockets");
oldstate = thread_cancelability(TRUE);
if (select(max(this->recv4, this->recv6) + 1, &rfds, NULL, NULL, NULL) <= 0)
{
thread_cancelability(oldstate);
return FAILED;
}
thread_cancelability(oldstate);
if (this->recv4 && FD_ISSET(this->recv4, &rfds))
{
/* IPv4 raw sockets return the IP header. We read src/dest
* information directly from the raw header */
struct iphdr *ip;
struct sockaddr_in src, dst;
bytes_read = recv(this->recv4, buffer, MAX_PACKET, 0);
if (bytes_read < 0)
{
DBG1(DBG_NET, "error reading from IPv4 socket: %s", strerror(errno));
return FAILED;
}
DBG3(DBG_NET, "received IPv4 packet %b", buffer, bytes_read);
/* read source/dest from raw IP/UDP header */
if (bytes_read < IP_LEN + UDP_LEN + MARKER_LEN)
{
DBG1(DBG_NET, "received IPv4 packet too short (%d bytes)",
bytes_read);
return FAILED;
}
ip = (struct iphdr*) buffer;
udp = (struct udphdr*) (buffer + IP_LEN);
src.sin_family = AF_INET;
src.sin_addr.s_addr = ip->saddr;
src.sin_port = udp->source;
dst.sin_family = AF_INET;
dst.sin_addr.s_addr = ip->daddr;
dst.sin_port = udp->dest;
source = host_create_from_sockaddr((sockaddr_t*)&src);
dest = host_create_from_sockaddr((sockaddr_t*)&dst);
pkt = packet_create();
pkt->set_source(pkt, source);
pkt->set_destination(pkt, dest);
DBG2(DBG_NET, "received packet: from %#H to %#H", source, dest);
data_offset = IP_LEN + UDP_LEN;
/* remove non esp marker */
if (dest->get_port(dest) == IKEV2_NATT_PORT)
{
data_offset += MARKER_LEN;
}
/* fill in packet */
data.len = bytes_read - data_offset;
data.ptr = malloc(data.len);
memcpy(data.ptr, buffer + data_offset, data.len);
pkt->set_data(pkt, data);
}
else if (this->recv6 && FD_ISSET(this->recv6, &rfds))
{
/* IPv6 raw sockets return no IP header. We must query
* src/dest via socket options/ancillary data */
struct msghdr msg;
struct cmsghdr *cmsgptr;
struct sockaddr_in6 src, dst;
struct iovec iov;
char ancillary[64];
msg.msg_name = &src;
msg.msg_namelen = sizeof(src);
iov.iov_base = buffer;
iov.iov_len = sizeof(buffer);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = ancillary;
msg.msg_controllen = sizeof(ancillary);
msg.msg_flags = 0;
bytes_read = recvmsg(this->recv6, &msg, 0);
if (bytes_read < 0)
{
DBG1(DBG_NET, "error reading from IPv6 socket: %s", strerror(errno));
return FAILED;
}
DBG3(DBG_NET, "received IPv6 packet %b", buffer, bytes_read);
if (bytes_read < IP_LEN + UDP_LEN + MARKER_LEN)
{
DBG3(DBG_NET, "received IPv6 packet too short (%d bytes)",
bytes_read);
return FAILED;
}
/* read ancillary data to get destination address */
for (cmsgptr = CMSG_FIRSTHDR(&msg); cmsgptr != NULL;
cmsgptr = CMSG_NXTHDR(&msg, cmsgptr))
{
if (cmsgptr->cmsg_len == 0)
{
DBG1(DBG_NET, "error reading IPv6 ancillary data");
return FAILED;
}
if (cmsgptr->cmsg_level == SOL_IPV6 &&
cmsgptr->cmsg_type == IPV6_2292PKTINFO)
{
struct in6_pktinfo *pktinfo;
pktinfo = (struct in6_pktinfo*)CMSG_DATA(cmsgptr);
memset(&dst, 0, sizeof(dst));
memcpy(&dst.sin6_addr, &pktinfo->ipi6_addr, sizeof(dst.sin6_addr));
dst.sin6_family = AF_INET6;
udp = (struct udphdr*) (buffer);
dst.sin6_port = udp->dest;
src.sin6_port = udp->source;
dest = host_create_from_sockaddr((sockaddr_t*)&dst);
}
}
/* ancillary data missing? */
if (dest == NULL)
{
DBG1(DBG_NET, "error reading IPv6 packet header");
return FAILED;
}
source = host_create_from_sockaddr((sockaddr_t*)&src);
pkt = packet_create();
pkt->set_source(pkt, source);
pkt->set_destination(pkt, dest);
DBG2(DBG_NET, "received packet: from %#H to %#H", source, dest);
data_offset = UDP_LEN;
/* remove non esp marker */
if (dest->get_port(dest) == IKEV2_NATT_PORT)
{
data_offset += MARKER_LEN;
}
/* fill in packet */
data.len = bytes_read - data_offset;
data.ptr = malloc(data.len);
memcpy(data.ptr, buffer + data_offset, data.len);
pkt->set_data(pkt, data);
}
else
{
/* oops, shouldn't happen */
return FAILED;
}
/* return packet */
*packet = pkt;
return SUCCESS;
}
/**
* implementation of socket_t.send
*/
status_t sender(private_socket_t *this, packet_t *packet)
{
int sport, skt, family;
ssize_t bytes_sent;
chunk_t data, marked;
host_t *src, *dst;
struct msghdr msg;
struct cmsghdr *cmsg;
struct iovec iov;
src = packet->get_source(packet);
dst = packet->get_destination(packet);
data = packet->get_data(packet);
DBG2(DBG_NET, "sending packet: from %#H to %#H", src, dst);
/* send data */
sport = src->get_port(src);
family = dst->get_family(dst);
if (sport == IKEV2_UDP_PORT)
{
if (family == AF_INET)
{
skt = this->send4;
}
else
{
skt = this->send6;
}
}
else if (sport == IKEV2_NATT_PORT)
{
if (family == AF_INET)
{
skt = this->send4_natt;
}
else
{
skt = this->send6_natt;
}
/* NAT keepalives without marker */
if (data.len != 1 || data.ptr[0] != 0xFF)
{
/* add non esp marker to packet */
if (data.len > MAX_PACKET - MARKER_LEN)
{
DBG1(DBG_NET, "unable to send packet: it's too big (%d bytes)",
data.len);
return FAILED;
}
marked = chunk_alloc(data.len + MARKER_LEN);
memset(marked.ptr, 0, MARKER_LEN);
memcpy(marked.ptr + MARKER_LEN, data.ptr, data.len);
/* let the packet do the clean up for us */
packet->set_data(packet, marked);
data = marked;
}
}
else
{
DBG1(DBG_NET, "unable to locate a send socket for port %d", sport);
return FAILED;
}
memset(&msg, 0, sizeof(struct msghdr));
msg.msg_name = dst->get_sockaddr(dst);;
msg.msg_namelen = *dst->get_sockaddr_len(dst);
iov.iov_base = data.ptr;
iov.iov_len = data.len;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_flags = 0;
if (!src->is_anyaddr(src))
{
if (family == AF_INET)
{
char buf[CMSG_SPACE(sizeof(struct in_pktinfo))];
struct in_pktinfo *pktinfo;
struct sockaddr_in *sin;
msg.msg_control = buf;
msg.msg_controllen = sizeof(buf);
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_IP;
cmsg->cmsg_type = IP_PKTINFO;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
pktinfo = (struct in_pktinfo*)CMSG_DATA(cmsg);
memset(pktinfo, 0, sizeof(struct in_pktinfo));
sin = (struct sockaddr_in*)src->get_sockaddr(src);
memcpy(&pktinfo->ipi_spec_dst, &sin->sin_addr, sizeof(struct in_addr));
}
else
{
char buf[CMSG_SPACE(sizeof(struct in6_pktinfo))];
struct in6_pktinfo *pktinfo;
struct sockaddr_in6 *sin;
msg.msg_control = buf;
msg.msg_controllen = sizeof(buf);
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_IPV6;
cmsg->cmsg_type = IPV6_2292PKTINFO;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
pktinfo = (struct in6_pktinfo*)CMSG_DATA(cmsg);
memset(pktinfo, 0, sizeof(struct in6_pktinfo));
sin = (struct sockaddr_in6*)src->get_sockaddr(src);
memcpy(&pktinfo->ipi6_addr, &sin->sin6_addr, sizeof(struct in6_addr));
}
}
bytes_sent = sendmsg(skt, &msg, 0);
if (bytes_sent != data.len)
{
DBG1(DBG_NET, "error writing to socket: %s", strerror(errno));
return FAILED;
}
return SUCCESS;
}
/**
* open a socket to send packets
*/
static int open_send_socket(private_socket_t *this, int family, u_int16_t port)
{
int on = TRUE;
int type = UDP_ENCAP_ESPINUDP;
struct sockaddr_storage addr;
u_int sol;
int skt;
memset(&addr, 0, sizeof(addr));
/* precalculate constants depending on address family */
switch (family)
{
case AF_INET:
{
struct sockaddr_in *sin = (struct sockaddr_in *)&addr;
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = INADDR_ANY;
sin->sin_port = htons(port);
sol = SOL_IP;
break;
}
case AF_INET6:
{
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&addr;
sin6->sin6_family = AF_INET6;
memcpy(&sin6->sin6_addr, &in6addr_any, sizeof(in6addr_any));
sin6->sin6_port = htons(port);
sol = SOL_IPV6;
break;
}
default:
return 0;
}
skt = socket(family, SOCK_DGRAM, IPPROTO_UDP);
if (skt < 0)
{
DBG1(DBG_NET, "could not open send socket: %s", strerror(errno));
return 0;
}
if (setsockopt(skt, SOL_SOCKET, SO_REUSEADDR, (void*)&on, sizeof(on)) < 0)
{
DBG1(DBG_NET, "unable to set SO_REUSEADDR on send socket: %s",
strerror(errno));
close(skt);
return 0;
}
/* bind the send socket */
if (bind(skt, (struct sockaddr *)&addr, sizeof(addr)) < 0)
{
DBG1(DBG_NET, "unable to bind send socket: %s",
strerror(errno));
close(skt);
return 0;
}
if (family == AF_INET)
{
/* enable UDP decapsulation globally, only for one socket needed */
if (setsockopt(skt, SOL_UDP, UDP_ENCAP, &type, sizeof(type)) < 0)
{
DBG1(DBG_NET, "unable to set UDP_ENCAP: %s; NAT-T may fail",
strerror(errno));
}
}
return skt;
}
/**
* open a socket to receive packets
*/
static int open_recv_socket(private_socket_t *this, int family)
{
int skt;
int on = TRUE;
u_int proto_offset, ip_len, sol, udp_header, ike_header;
/* precalculate constants depending on address family */
switch (family)
{
case AF_INET:
proto_offset = IP_PROTO_OFFSET;
ip_len = IP_LEN;
sol = SOL_IP;
break;
case AF_INET6:
proto_offset = IP6_PROTO_OFFSET;
ip_len = 0; /* IPv6 raw sockets contain no IP header */
sol = SOL_IPV6;
break;
default:
return 0;
}
udp_header = ip_len;
ike_header = ip_len + UDP_LEN;
/* This filter code filters out all non-IKEv2 traffic on
* a SOCK_RAW IP_PROTP_UDP socket. Handling of other
* IKE versions is done in pluto.
*/
struct sock_filter ikev2_filter_code[] =
{
/* Destination Port must be either port or natt_port */
BPF_STMT(BPF_LD+BPF_H+BPF_ABS, udp_header + 2),
BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, IKEV2_UDP_PORT, 1, 0),
BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, IKEV2_NATT_PORT, 5, 12),
/* port */
/* IKE version must be 2.0 */
BPF_STMT(BPF_LD+BPF_B+BPF_ABS, ike_header + IKE_VERSION_OFFSET),
BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, 0x20, 0, 10),
/* packet length is length in IKEv2 header + ip header + udp header */
BPF_STMT(BPF_LD+BPF_W+BPF_ABS, ike_header + IKE_LENGTH_OFFSET),
BPF_STMT(BPF_ALU+BPF_ADD+BPF_K, ip_len + UDP_LEN),
BPF_STMT(BPF_RET+BPF_A, 0),
/* natt_port */
/* nat-t: check for marker */
BPF_STMT(BPF_LD+BPF_W+BPF_ABS, ike_header),
BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, 0, 0, 5),
/* nat-t: IKE version must be 2.0 */
BPF_STMT(BPF_LD+BPF_B+BPF_ABS, ike_header + MARKER_LEN + IKE_VERSION_OFFSET),
BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, 0x20, 0, 3),
/* nat-t: packet length is length in IKEv2 header + ip header + udp header + non esp marker */
BPF_STMT(BPF_LD+BPF_W+BPF_ABS, ike_header + MARKER_LEN + IKE_LENGTH_OFFSET),
BPF_STMT(BPF_ALU+BPF_ADD+BPF_K, ip_len + UDP_LEN + MARKER_LEN),
BPF_STMT(BPF_RET+BPF_A, 0),
/* packet doesn't match, ignore */
BPF_STMT(BPF_RET+BPF_K, 0),
};
/* Filter struct to use with setsockopt */
struct sock_fprog ikev2_filter = {
sizeof(ikev2_filter_code) / sizeof(struct sock_filter),
ikev2_filter_code
};
/* set up a raw socket */
skt = socket(family, SOCK_RAW, IPPROTO_UDP);
if (skt < 0)
{
DBG1(DBG_NET, "unable to create raw socket: %s", strerror(errno));
return 0;
}
if (setsockopt(skt, SOL_SOCKET, SO_ATTACH_FILTER,
&ikev2_filter, sizeof(ikev2_filter)) < 0)
{
DBG1(DBG_NET, "unable to attach IKEv2 filter to raw socket: %s",
strerror(errno));
close(skt);
return 0;
}
if (family == AF_INET6 &&
/* we use IPV6_2292PKTINFO, as IPV6_PKTINFO is defined as
* 2 or 50 depending on kernel header version */
setsockopt(skt, sol, IPV6_2292PKTINFO, &on, sizeof(on)) < 0)
{
DBG1(DBG_NET, "unable to set IPV6_PKTINFO on raw socket: %s",
strerror(errno));
close(skt);
return 0;
}
return skt;
}
/**
* enumerator for underlying sockets
*/
typedef struct {
/** implements enumerator_t */
enumerator_t public;
/** sockets we enumerate */
private_socket_t *socket;
/** counter */
int index;
} socket_enumerator_t;
/**
* enumerate function for socket_enumerator_t
*/
static bool enumerate(socket_enumerator_t *this, int *fd, int *family, int *port)
{
static const struct {
int fd_offset;
int family;
int port;
} sockets[] = {
{ offsetof(private_socket_t, recv4), AF_INET, IKEV2_UDP_PORT },
{ offsetof(private_socket_t, recv6), AF_INET6, IKEV2_UDP_PORT },
{ offsetof(private_socket_t, send4), AF_INET, IKEV2_UDP_PORT },
{ offsetof(private_socket_t, send6), AF_INET6, IKEV2_UDP_PORT },
{ offsetof(private_socket_t, send4_natt), AF_INET, IKEV2_NATT_PORT },
{ offsetof(private_socket_t, send6_natt), AF_INET6, IKEV2_NATT_PORT }
};
while(++this->index < countof(sockets))
{
int sock = *(int*)((char*)this->socket + sockets[this->index].fd_offset);
if (!sock)
{
continue;
}
*fd = sock;
*family = sockets[this->index].family;
*port = sockets[this->index].port;
return TRUE;
}
return FALSE;
}
/**
* implementation of socket_t.create_enumerator
*/
static enumerator_t *create_enumerator(private_socket_t *this)
{
socket_enumerator_t *enumerator;
enumerator = malloc_thing(socket_enumerator_t);
enumerator->index = -1;
enumerator->socket = this;
enumerator->public.enumerate = (void*)enumerate;
enumerator->public.destroy = (void*)free;
return &enumerator->public;
}
/**
* implementation of socket_t.destroy
*/
static void destroy(private_socket_t *this)
{
if (this->recv4)
{
close(this->recv4);
}
if (this->recv6)
{
close(this->recv6);
}
if (this->send4)
{
close(this->send4);
}
if (this->send6)
{
close(this->send6);
}
if (this->send4_natt)
{
close(this->send4_natt);
}
if (this->send6_natt)
{
close(this->send6_natt);
}
free(this);
}
/*
* See header for description
*/
socket_t *socket_create()
{
private_socket_t *this = malloc_thing(private_socket_t);
/* public functions */
this->public.send = (status_t(*)(socket_t*, packet_t*))sender;
this->public.receive = (status_t(*)(socket_t*, packet_t**))receiver;
this->public.create_enumerator = (enumerator_t*(*)(socket_t*))create_enumerator;
this->public.destroy = (void(*)(socket_t*)) destroy;
this->recv4 = 0;
this->recv6 = 0;
this->send4 = 0;
this->send6 = 0;
this->send4_natt = 0;
this->send6_natt = 0;
this->recv4 = open_recv_socket(this, AF_INET);
if (this->recv4 == 0)
{
DBG1(DBG_NET, "could not open IPv4 receive socket, IPv4 disabled");
}
else
{
this->send4 = open_send_socket(this, AF_INET, IKEV2_UDP_PORT);
if (this->send4 == 0)
{
DBG1(DBG_NET, "could not open IPv4 send socket, IPv4 disabled");
close(this->recv4);
}
else
{
this->send4_natt = open_send_socket(this, AF_INET, IKEV2_NATT_PORT);
if (this->send4_natt == 0)
{
DBG1(DBG_NET, "could not open IPv4 NAT-T send socket");
}
}
}
this->recv6 = open_recv_socket(this, AF_INET6);
if (this->recv6 == 0)
{
DBG1(DBG_NET, "could not open IPv6 receive socket, IPv6 disabled");
}
else
{
this->send6 = open_send_socket(this, AF_INET6, IKEV2_UDP_PORT);
if (this->send6 == 0)
{
DBG1(DBG_NET, "could not open IPv6 send socket, IPv6 disabled");
close(this->recv6);
}
else
{
this->send6_natt = open_send_socket(this, AF_INET6, IKEV2_NATT_PORT);
if (this->send6_natt == 0)
{
DBG1(DBG_NET, "could not open IPv6 NAT-T send socket");
}
}
}
if (!(this->send4 || this->send6) || !(this->recv4 || this->recv6))
{
DBG1(DBG_NET, "could not create any sockets");
destroy(this);
charon->kill(charon, "socket initialization failed");
}
return (socket_t*)this;
}
src/charon/network/socket.c
-685
View File
@@ -1,685 +0,0 @@
/*
* Copyright (C) 2006-2009 Tobias Brunner
* Copyright (C) 2006 Daniel Roethlisberger
* Copyright (C) 2005-2007 Martin Willi
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
/* for struct in6_pktinfo */
#define _GNU_SOURCE
#ifdef __sun
#define _XPG4_2
#define __EXTENSIONS__
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/udp.h>
#include <net/if.h>
#ifdef __APPLE__
#include <sys/sysctl.h>
#endif
#include "socket.h"
#include <daemon.h>
#include <threading/thread.h>
/* length of non-esp marker */
#define MARKER_LEN sizeof(u_int32_t)
/* from linux/udp.h */
#ifndef UDP_ENCAP
#define UDP_ENCAP 100
#endif /*UDP_ENCAP*/
#ifndef UDP_ENCAP_ESPINUDP
#define UDP_ENCAP_ESPINUDP 2
#endif /*UDP_ENCAP_ESPINUDP*/
/* these are not defined on some platforms */
#ifndef SOL_IP
#define SOL_IP IPPROTO_IP
#endif
#ifndef SOL_IPV6
#define SOL_IPV6 IPPROTO_IPV6
#endif
#ifndef SOL_UDP
#define SOL_UDP IPPROTO_UDP
#endif
/* IPV6_RECVPKTINFO is defined in RFC 3542 which obsoletes RFC 2292 that
* previously defined IPV6_PKTINFO */
#ifndef IPV6_RECVPKTINFO
#define IPV6_RECVPKTINFO IPV6_PKTINFO
#endif
#ifndef IN6ADDR_ANY_INIT
#define IN6ADDR_ANY_INIT {{{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}}
#endif
#ifndef HAVE_IN6ADDR_ANY
static const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
#endif
typedef struct private_socket_t private_socket_t;
/**
* Private data of an socket_t object
*/
struct private_socket_t {
/**
* public functions
*/
socket_t public;
/**
* IPv4 socket (500)
*/
int ipv4;
/**
* IPv4 socket for NATT (4500)
*/
int ipv4_natt;
/**
* IPv6 socket (500)
*/
int ipv6;
/**
* IPv6 socket for NATT (4500)
*/
int ipv6_natt;
};
/**
* implementation of socket_t.receive
*/
static status_t receiver(private_socket_t *this, packet_t **packet)
{
char buffer[MAX_PACKET];
chunk_t data;
packet_t *pkt;
host_t *source = NULL, *dest = NULL;
int bytes_read = 0, data_offset;
bool oldstate;
fd_set rfds;
int max_fd = 0, selected = 0;
u_int16_t port = 0;
FD_ZERO(&rfds);
if (this->ipv4)
{
FD_SET(this->ipv4, &rfds);
}
if (this->ipv4_natt)
{
FD_SET(this->ipv4_natt, &rfds);
}
if (this->ipv6)
{
FD_SET(this->ipv6, &rfds);
}
if (this->ipv6_natt)
{
FD_SET(this->ipv6_natt, &rfds);
}
max_fd = max(max(this->ipv4, this->ipv4_natt), max(this->ipv6, this->ipv6_natt));
DBG2(DBG_NET, "waiting for data on sockets");
oldstate = thread_cancelability(TRUE);
if (select(max_fd + 1, &rfds, NULL, NULL, NULL) <= 0)
{
thread_cancelability(oldstate);
return FAILED;
}
thread_cancelability(oldstate);
if (FD_ISSET(this->ipv4, &rfds))
{
port = IKEV2_UDP_PORT;
selected = this->ipv4;
}
if (FD_ISSET(this->ipv4_natt, &rfds))
{
port = IKEV2_NATT_PORT;
selected = this->ipv4_natt;
}
if (FD_ISSET(this->ipv6, &rfds))
{
port = IKEV2_UDP_PORT;
selected = this->ipv6;
}
if (FD_ISSET(this->ipv6_natt, &rfds))
{
port = IKEV2_NATT_PORT;
selected = this->ipv6_natt;
}
if (selected)
{
struct msghdr msg;
struct cmsghdr *cmsgptr;
struct iovec iov;
char ancillary[64];
union {
struct sockaddr_in in4;
struct sockaddr_in6 in6;
} src;
msg.msg_name = &src;
msg.msg_namelen = sizeof(src);
iov.iov_base = buffer;
iov.iov_len = sizeof(buffer);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = ancillary;
msg.msg_controllen = sizeof(ancillary);
msg.msg_flags = 0;
bytes_read = recvmsg(selected, &msg, 0);
if (bytes_read < 0)
{
DBG1(DBG_NET, "error reading socket: %s", strerror(errno));
return FAILED;
}
DBG3(DBG_NET, "received packet %b", buffer, bytes_read);
if (bytes_read < MARKER_LEN)
{
DBG3(DBG_NET, "received packet too short (%d bytes)",
bytes_read);
return FAILED;
}
/* read ancillary data to get destination address */
for (cmsgptr = CMSG_FIRSTHDR(&msg); cmsgptr != NULL;
cmsgptr = CMSG_NXTHDR(&msg, cmsgptr))
{
if (cmsgptr->cmsg_len == 0)
{
DBG1(DBG_NET, "error reading ancillary data");
return FAILED;
}
#ifdef HAVE_IN6_PKTINFO
if (cmsgptr->cmsg_level == SOL_IPV6 &&
cmsgptr->cmsg_type == IPV6_PKTINFO)
{
struct in6_pktinfo *pktinfo;
pktinfo = (struct in6_pktinfo*)CMSG_DATA(cmsgptr);
struct sockaddr_in6 dst;
memset(&dst, 0, sizeof(dst));
memcpy(&dst.sin6_addr, &pktinfo->ipi6_addr, sizeof(dst.sin6_addr));
dst.sin6_family = AF_INET6;
dst.sin6_port = htons(port);
dest = host_create_from_sockaddr((sockaddr_t*)&dst);
}
#endif /* HAVE_IN6_PKTINFO */
if (cmsgptr->cmsg_level == SOL_IP &&
#ifdef IP_PKTINFO
cmsgptr->cmsg_type == IP_PKTINFO
#elif defined(IP_RECVDSTADDR)
cmsgptr->cmsg_type == IP_RECVDSTADDR
#else
FALSE
#endif
)
{
struct in_addr *addr;
struct sockaddr_in dst;
#ifdef IP_PKTINFO
struct in_pktinfo *pktinfo;
pktinfo = (struct in_pktinfo*)CMSG_DATA(cmsgptr);
addr = &pktinfo->ipi_addr;
#elif defined(IP_RECVDSTADDR)
addr = (struct in_addr*)CMSG_DATA(cmsgptr);
#endif
memset(&dst, 0, sizeof(dst));
memcpy(&dst.sin_addr, addr, sizeof(dst.sin_addr));
dst.sin_family = AF_INET;
dst.sin_port = htons(port);
dest = host_create_from_sockaddr((sockaddr_t*)&dst);
}
if (dest)
{
break;
}
}
if (dest == NULL)
{
DBG1(DBG_NET, "error reading IP header");
return FAILED;
}
source = host_create_from_sockaddr((sockaddr_t*)&src);
pkt = packet_create();
pkt->set_source(pkt, source);
pkt->set_destination(pkt, dest);
DBG2(DBG_NET, "received packet: from %#H to %#H", source, dest);
data_offset = 0;
/* remove non esp marker */
if (dest->get_port(dest) == IKEV2_NATT_PORT)
{
data_offset += MARKER_LEN;
}
/* fill in packet */
data.len = bytes_read - data_offset;
data.ptr = malloc(data.len);
memcpy(data.ptr, buffer + data_offset, data.len);
pkt->set_data(pkt, data);
}
else
{
/* oops, shouldn't happen */
return FAILED;
}
/* return packet */
*packet = pkt;
return SUCCESS;
}
/**
* implementation of socket_t.send
*/
status_t sender(private_socket_t *this, packet_t *packet)
{
int sport, skt, family;
ssize_t bytes_sent;
chunk_t data, marked;
host_t *src, *dst;
struct msghdr msg;
struct cmsghdr *cmsg;
struct iovec iov;
src = packet->get_source(packet);
dst = packet->get_destination(packet);
data = packet->get_data(packet);
DBG2(DBG_NET, "sending packet: from %#H to %#H", src, dst);
/* send data */
sport = src->get_port(src);
family = dst->get_family(dst);
if (sport == IKEV2_UDP_PORT)
{
if (family == AF_INET)
{
skt = this->ipv4;
}
else
{
skt = this->ipv6;
}
}
else if (sport == IKEV2_NATT_PORT)
{
if (family == AF_INET)
{
skt = this->ipv4_natt;
}
else
{
skt = this->ipv6_natt;
}
/* NAT keepalives without marker */
if (data.len != 1 || data.ptr[0] != 0xFF)
{
/* add non esp marker to packet */
if (data.len > MAX_PACKET - MARKER_LEN)
{
DBG1(DBG_NET, "unable to send packet: it's too big (%d bytes)",
data.len);
return FAILED;
}
marked = chunk_alloc(data.len + MARKER_LEN);
memset(marked.ptr, 0, MARKER_LEN);
memcpy(marked.ptr + MARKER_LEN, data.ptr, data.len);
/* let the packet do the clean up for us */
packet->set_data(packet, marked);
data = marked;
}
}
else
{
DBG1(DBG_NET, "unable to locate a send socket for port %d", sport);
return FAILED;
}
memset(&msg, 0, sizeof(struct msghdr));
msg.msg_name = dst->get_sockaddr(dst);;
msg.msg_namelen = *dst->get_sockaddr_len(dst);
iov.iov_base = data.ptr;
iov.iov_len = data.len;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_flags = 0;
if (!src->is_anyaddr(src))
{
if (family == AF_INET)
{
#if defined(IP_PKTINFO) || defined(IP_SENDSRCADDR)
struct in_addr *addr;
struct sockaddr_in *sin;
#ifdef IP_PKTINFO
char buf[CMSG_SPACE(sizeof(struct in_pktinfo))];
struct in_pktinfo *pktinfo;
#elif defined(IP_SENDSRCADDR)
char buf[CMSG_SPACE(sizeof(struct in_addr))];
#endif
msg.msg_control = buf;
msg.msg_controllen = sizeof(buf);
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_IP;
#ifdef IP_PKTINFO
cmsg->cmsg_type = IP_PKTINFO;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
pktinfo = (struct in_pktinfo*)CMSG_DATA(cmsg);
memset(pktinfo, 0, sizeof(struct in_pktinfo));
addr = &pktinfo->ipi_spec_dst;
#elif defined(IP_SENDSRCADDR)
cmsg->cmsg_type = IP_SENDSRCADDR;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_addr));
addr = (struct in_addr*)CMSG_DATA(cmsg);
#endif
sin = (struct sockaddr_in*)src->get_sockaddr(src);
memcpy(addr, &sin->sin_addr, sizeof(struct in_addr));
#endif /* IP_PKTINFO || IP_SENDSRCADDR */
}
#ifdef HAVE_IN6_PKTINFO
else
{
char buf[CMSG_SPACE(sizeof(struct in6_pktinfo))];
struct in6_pktinfo *pktinfo;
struct sockaddr_in6 *sin;
msg.msg_control = buf;
msg.msg_controllen = sizeof(buf);
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_IPV6;
cmsg->cmsg_type = IPV6_PKTINFO;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
pktinfo = (struct in6_pktinfo*)CMSG_DATA(cmsg);
memset(pktinfo, 0, sizeof(struct in6_pktinfo));
sin = (struct sockaddr_in6*)src->get_sockaddr(src);
memcpy(&pktinfo->ipi6_addr, &sin->sin6_addr, sizeof(struct in6_addr));
}
#endif /* HAVE_IN6_PKTINFO */
}
bytes_sent = sendmsg(skt, &msg, 0);
if (bytes_sent != data.len)
{
DBG1(DBG_NET, "error writing to socket: %s", strerror(errno));
return FAILED;
}
return SUCCESS;
}
/**
* open a socket to send and receive packets
*/
static int open_socket(private_socket_t *this, int family, u_int16_t port)
{
int on = TRUE;
struct sockaddr_storage addr;
socklen_t addrlen;
u_int sol, pktinfo = 0;
int skt;
memset(&addr, 0, sizeof(addr));
/* precalculate constants depending on address family */
switch (family)
{
case AF_INET:
{
struct sockaddr_in *sin = (struct sockaddr_in *)&addr;
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = INADDR_ANY;
sin->sin_port = htons(port);
addrlen = sizeof(struct sockaddr_in);
sol = SOL_IP;
#ifdef IP_PKTINFO
pktinfo = IP_PKTINFO;
#elif defined(IP_RECVDSTADDR)
pktinfo = IP_RECVDSTADDR;
#endif
break;
}
case AF_INET6:
{
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&addr;
sin6->sin6_family = AF_INET6;
memcpy(&sin6->sin6_addr, &in6addr_any, sizeof(in6addr_any));
sin6->sin6_port = htons(port);
addrlen = sizeof(struct sockaddr_in6);
sol = SOL_IPV6;
pktinfo = IPV6_RECVPKTINFO;
break;
}
default:
return 0;
}
skt = socket(family, SOCK_DGRAM, IPPROTO_UDP);
if (skt < 0)
{
DBG1(DBG_NET, "could not open socket: %s", strerror(errno));
return 0;
}
if (setsockopt(skt, SOL_SOCKET, SO_REUSEADDR, (void*)&on, sizeof(on)) < 0)
{
DBG1(DBG_NET, "unable to set SO_REUSEADDR on socket: %s", strerror(errno));
close(skt);
return 0;
}
/* bind the socket */
if (bind(skt, (struct sockaddr *)&addr, addrlen) < 0)
{
DBG1(DBG_NET, "unable to bind socket: %s", strerror(errno));
close(skt);
return 0;
}
/* get additional packet info on receive */
if (pktinfo > 0)
{
if (setsockopt(skt, sol, pktinfo, &on, sizeof(on)) < 0)
{
DBG1(DBG_NET, "unable to set IP_PKTINFO on socket: %s", strerror(errno));
close(skt);
return 0;
}
}
#ifndef __APPLE__
{
/* enable UDP decapsulation globally, only for one socket needed */
int type = UDP_ENCAP_ESPINUDP;
if (family == AF_INET && port == IKEV2_NATT_PORT &&
setsockopt(skt, SOL_UDP, UDP_ENCAP, &type, sizeof(type)) < 0)
{
DBG1(DBG_NET, "unable to set UDP_ENCAP: %s", strerror(errno));
}
}
#endif
return skt;
}
/**
* enumerator for underlying sockets
*/
typedef struct {
/** implements enumerator_t */
enumerator_t public;
/** sockets we enumerate */
private_socket_t *socket;
/** counter */
int index;
} socket_enumerator_t;
/**
* enumerate function for socket_enumerator_t
*/
static bool enumerate(socket_enumerator_t *this, int *fd, int *family, int *port)
{
static const struct {
int fd_offset;
int family;
int port;
} sockets[] = {
{ offsetof(private_socket_t, ipv4), AF_INET, IKEV2_UDP_PORT },
{ offsetof(private_socket_t, ipv6), AF_INET6, IKEV2_UDP_PORT },
{ offsetof(private_socket_t, ipv4_natt), AF_INET, IKEV2_NATT_PORT },
{ offsetof(private_socket_t, ipv6_natt), AF_INET6, IKEV2_NATT_PORT }
};
while(++this->index < countof(sockets))
{
int sock = *(int*)((char*)this->socket + sockets[this->index].fd_offset);
if (!sock)
{
continue;
}
*fd = sock;
*family = sockets[this->index].family;
*port = sockets[this->index].port;
return TRUE;
}
return FALSE;
}
/**
* implementation of socket_t.create_enumerator
*/
static enumerator_t *create_enumerator(private_socket_t *this)
{
socket_enumerator_t *enumerator;
enumerator = malloc_thing(socket_enumerator_t);
enumerator->index = -1;
enumerator->socket = this;
enumerator->public.enumerate = (void*)enumerate;
enumerator->public.destroy = (void*)free;
return &enumerator->public;
}
/**
* implementation of socket_t.destroy
*/
static void destroy(private_socket_t *this)
{
if (this->ipv4)
{
close(this->ipv4);
}
if (this->ipv4_natt)
{
close(this->ipv4_natt);
}
if (this->ipv6)
{
close(this->ipv6);
}
if (this->ipv6_natt)
{
close(this->ipv6_natt);
}
free(this);
}
/*
* See header for description
*/
socket_t *socket_create()
{
private_socket_t *this = malloc_thing(private_socket_t);
/* public functions */
this->public.send = (status_t(*)(socket_t*, packet_t*))sender;
this->public.receive = (status_t(*)(socket_t*, packet_t**))receiver;
this->public.create_enumerator = (enumerator_t*(*)(socket_t*))create_enumerator;
this->public.destroy = (void(*)(socket_t*)) destroy;
this->ipv4 = 0;
this->ipv6 = 0;
this->ipv4_natt = 0;
this->ipv6_natt = 0;
#ifdef __APPLE__
{
int natt_port = IKEV2_NATT_PORT;
if (sysctlbyname("net.inet.ipsec.esp_port", NULL, NULL, &natt_port,
sizeof(natt_port)) != 0)
{
DBG1(DBG_NET, "could not set net.inet.ipsec.esp_port to %d: %s",
natt_port, strerror(errno));
}
}
#endif
this->ipv4 = open_socket(this, AF_INET, IKEV2_UDP_PORT);
if (this->ipv4 == 0)
{
DBG1(DBG_NET, "could not open IPv4 socket, IPv4 disabled");
}
else
{
this->ipv4_natt = open_socket(this, AF_INET, IKEV2_NATT_PORT);
if (this->ipv4_natt == 0)
{
DBG1(DBG_NET, "could not open IPv4 NAT-T socket");
}
}
this->ipv6 = open_socket(this, AF_INET6, IKEV2_UDP_PORT);
if (this->ipv6 == 0)
{
DBG1(DBG_NET, "could not open IPv6 socket, IPv6 disabled");
}
else
{
this->ipv6_natt = open_socket(this, AF_INET6, IKEV2_NATT_PORT);
if (this->ipv6_natt == 0)
{
DBG1(DBG_NET, "could not open IPv6 NAT-T socket");
}
}
if (!this->ipv4 && !this->ipv6)
{
DBG1(DBG_NET, "could not create any sockets");
destroy(this);
charon->kill(charon, "socket initialization failed");
}
return (socket_t*)this;
}
src/charon/network/socket.h
+2 -33
View File
@@ -1,6 +1,6 @@
/*
* Copyright (C) 2006 Tobias Brunner, Daniel Roethlisberger
* Copyright (C) 2005-2008 Martin Willi
* Copyright (C) 2005-2010 Martin Willi
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
*
@@ -27,29 +27,10 @@ typedef struct socket_t socket_t;
#include <library.h>
#include <network/packet.h>
#include <utils/host.h>
#include <utils/enumerator.h>
/**
* Maximum size of a packet.
*
* 3000 Bytes should be sufficient, see IKEv2 RFC. However, to run our
* multi-CA test with 2 intermediate CAs, we increase that to 5000 bytes.
*/
#define MAX_PACKET 5000
/**
* Abstraction of all sockets (IPv4/IPv6 send/receive).
*
* All available sockets are bound and the receive function
* reads from them. There are actually two implementations:
* The first uses raw sockets to allow binding of other daemons (pluto) to
* UDP/500. An installed "Linux socket filter" filters out all non-IKEv2
* traffic and handles just IKEv2 messages. An other daemon (pluto) must
* handle all traffic separately, e.g. ignore IKEv2 traffic, since charon
* handles that.
* The other implementation uses normal sockets and is built if
* --disable-pluto is given to the configure script.
* Socket interface definition.
*/
struct socket_t {
@@ -85,18 +66,6 @@ struct socket_t {
* @return enumerator over (int fd, int family, int port)
*/
enumerator_t *(*create_enumerator) (socket_t *this);
/**
* Destroy socket.
*/
void (*destroy) (socket_t *this);
};
/**
* Create a socket_t, which binds multiple sockets.
*
* @return socket_t object
*/
socket_t *socket_create();
#endif /** SOCKET_H_ @}*/
src/charon/network/socket_manager.c
+145
View File
@@ -0,0 +1,145 @@
/*
* Copyright (C) 2010 Martin Willi
* Copyright (C) 2010 revosec AG
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "socket_manager.h"
#include <daemon.h>
#include <threading/thread.h>
#include <threading/rwlock.h>
#include <utils/linked_list.h>
typedef struct private_socket_manager_t private_socket_manager_t;
/**
* Private data of an socket_manager_t object.
*/
struct private_socket_manager_t {
/**
* Public socket_manager_t interface.
*/
socket_manager_t public;
/**
* List of registered socket
*/
linked_list_t *sockets;
/**
* Lock for sockets list
*/
rwlock_t *lock;
};
METHOD(socket_manager_t, receiver, status_t,
private_socket_manager_t *this, packet_t **packet)
{
socket_t *socket;
status_t status;
this->lock->read_lock(this->lock);
if (this->sockets->get_first(this->sockets, (void**)&socket) != SUCCESS)
{
DBG1(DBG_NET, "no socket implementation registered, receiving failed");
this->lock->unlock(this->lock);
return NOT_SUPPORTED;
}
/* receive is blocking and the thread can be cancelled */
thread_cleanup_push((thread_cleanup_t)this->lock->unlock, this->lock);
status = socket->receive(socket, packet);
thread_cleanup_pop(TRUE);
return status;
}
METHOD(socket_manager_t, sender, status_t,
private_socket_manager_t *this, packet_t *packet)
{
socket_t *socket;
status_t status;
this->lock->read_lock(this->lock);
if (this->sockets->get_first(this->sockets, (void**)&socket) != SUCCESS)
{
DBG1(DBG_NET, "no socket implementation registered, sending failed");
this->lock->unlock(this->lock);
return NOT_SUPPORTED;
}
status = socket->send(socket, packet);
this->lock->unlock(this->lock);
return status;
}
METHOD(socket_manager_t, create_enumerator, enumerator_t*,
private_socket_manager_t *this)
{
socket_t *socket;
this->lock->read_lock(this->lock);
if (this->sockets->get_first(this->sockets, (void**)&socket) != SUCCESS)
{
this->lock->unlock(this->lock);
return enumerator_create_empty();
}
return enumerator_create_cleaner(socket->create_enumerator(socket),
(void*)this->lock->unlock, this->lock);
}
METHOD(socket_manager_t, add_socket, void,
private_socket_manager_t *this, socket_t *socket)
{
this->lock->write_lock(this->lock);
this->sockets->insert_last(this->sockets, socket);
this->lock->unlock(this->lock);
}
METHOD(socket_manager_t, remove_socket, void,
private_socket_manager_t *this, socket_t *socket)
{
this->lock->write_lock(this->lock);
this->sockets->remove(this->sockets, socket, NULL);
this->lock->unlock(this->lock);
}
METHOD(socket_manager_t, destroy, void,
private_socket_manager_t *this)
{
this->sockets->destroy(this->sockets);
this->lock->destroy(this->lock);
free(this);
}
/**
* See header
*/
socket_manager_t *socket_manager_create()
{
private_socket_manager_t *this;
INIT(this,
.public = {
.send = _sender,
.receive = _receiver,
.create_enumerator = _create_enumerator,
.add_socket = _add_socket,
.remove_socket = _remove_socket,
.destroy = _destroy,
},
.sockets = linked_list_create(),
.lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
);
return &this->public;
}
src/charon/network/socket_manager.h
+81
View File
@@ -0,0 +1,81 @@
/*
* Copyright (C) 2010 Martin Willi
* Copyright (C) 2010 revosec AG
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
/**
* @defgroup socket_manager socket_manager
* @{ @ingroup network
*/
#ifndef SOCKET_MANAGER_H_
#define SOCKET_MANAGER_H_
#include <network/socket.h>
typedef struct socket_manager_t socket_manager_t;
/**
* Handle pluggable socket implementations and send/receive packets through it.
*/
struct socket_manager_t {
/**
* Receive a packet using the registered socket.
*
* @param packet allocated packet that has been received
* @return
* - SUCCESS when packet successfully received
* - FAILED when unable to receive
*/
status_t (*receive) (socket_manager_t *this, packet_t **packet);
/**
* Send a packet using the registered socket.
*
* @param packet packet to send out
* @return
* - SUCCESS when packet successfully sent
* - FAILED when unable to send
*/
status_t (*send) (socket_manager_t *this, packet_t *packet);
/**
* Enumerate all underlying socket file descriptors of the active socket.
*
* @return enumerator over (int fd, int family, int port)
*/
enumerator_t *(*create_enumerator) (socket_manager_t *this);
/**
* Register a socket implementation.
*/
void (*add_socket)(socket_manager_t *this, socket_t *socket);
/**
* Unregister a registered socket implementation.
*/
void (*remove_socket)(socket_manager_t *this, socket_t *socket);
/**
* Destroy a socket_manager_t.
*/
void (*destroy)(socket_manager_t *this);
};
/**
* Create a socket_manager instance.
*/
socket_manager_t *socket_manager_create();
#endif /** SOCKET_MANAGER_H_ @}*/