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/**
* Unix Socket
* (C) 2004-2010 Jack Lloyd
*
* Released under the terms of the Botan license
*/
#include <botan/unx_sock.h>
#include <botan/exceptn.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
namespace Botan {
/**
* Unix Socket Constructor
*/
Unix_Socket::Unix_Socket(const std::string& host, u16bit port) : peer(host)
{
sockfd = -1;
hostent* host_addr = ::gethostbyname(host.c_str());
if(host_addr == 0)
throw Stream_IO_Error("Unix_Socket: gethostbyname failed for " + host);
if(host_addr->h_addrtype != AF_INET) // FIXME
throw Stream_IO_Error("Unix_Socket: " + host + " has IPv6 address");
int fd = ::socket(PF_INET, SOCK_STREAM, 0);
if(fd == -1)
throw Stream_IO_Error("Unix_Socket: Unable to acquire socket");
sockaddr_in socket_info;
::memset(&socket_info, 0, sizeof(socket_info));
socket_info.sin_family = AF_INET;
socket_info.sin_port = htons(port);
socket_info.sin_addr = *(struct in_addr*)host_addr->h_addr; // FIXME
if(::connect(fd, (sockaddr*)&socket_info, sizeof(struct sockaddr)) != 0)
{
::close(fd);
throw Stream_IO_Error("Unix_Socket: connect failed");
}
sockfd = fd;
}
/**
* Unix Socket Constructor
*/
Unix_Socket::Unix_Socket(int fd, const std::string& peer_id)
{
sockfd = fd;
peer = peer_id;
}
/**
* Read from a Unix socket
*/
size_t Unix_Socket::read(byte buf[], size_t length)
{
if(sockfd == -1)
throw Stream_IO_Error("Unix_Socket::read: Socket not connected");
size_t got = 0;
while(length)
{
ssize_t this_time = ::recv(sockfd, buf + got, length, MSG_NOSIGNAL);
if(this_time == 0)
break;
if(this_time == -1)
{
if(errno == EINTR)
this_time = 0;
else
throw Stream_IO_Error("Unix_Socket::read: Socket read failed");
}
got += this_time;
length -= this_time;
}
return got;
}
/**
* Write to a Unix socket
*/
void Unix_Socket::write(const byte buf[], size_t length)
{
if(sockfd == -1)
throw Stream_IO_Error("Unix_Socket::write: Socket not connected");
size_t offset = 0;
while(length)
{
ssize_t sent = ::send(sockfd, buf + offset, length, MSG_NOSIGNAL);
if(sent == -1)
{
if(errno == EINTR)
sent = 0;
else
throw Stream_IO_Error("Unix_Socket::write: Socket write failed");
}
offset += sent;
length -= sent;
}
}
/**
* Close a Unix socket
*/
void Unix_Socket::close()
{
if(sockfd != -1)
{
if(::close(sockfd) != 0)
throw Stream_IO_Error("Unix_Socket::close failed");
sockfd = -1;
}
}
/**
* Return the peer's name
*/
std::string Unix_Socket::peer_id() const
{
return peer;
}
/**
* Unix Server Socket Constructor
*/
Unix_Server_Socket::Unix_Server_Socket(u16bit port)
{
sockfd = -1;
int fd = ::socket(PF_INET, SOCK_STREAM, 0);
if(fd == -1)
throw Stream_IO_Error("Unix_Server_Socket: Unable to acquire socket");
sockaddr_in socket_info;
::memset(&socket_info, 0, sizeof(socket_info));
socket_info.sin_family = AF_INET;
socket_info.sin_port = htons(port);
// FIXME: support limiting listeners
socket_info.sin_addr.s_addr = INADDR_ANY;
if(::bind(fd, (sockaddr*)&socket_info, sizeof(struct sockaddr)) != 0)
{
::close(fd);
throw Stream_IO_Error("Unix_Server_Socket: bind failed");
}
if(listen(fd, 100) != 0) // FIXME: totally arbitrary
{
::close(fd);
throw Stream_IO_Error("Unix_Server_Socket: listen failed");
}
sockfd = fd;
}
/**
* Close a Unix socket
*/
void Unix_Server_Socket::close()
{
if(sockfd != -1)
{
if(::close(sockfd) != 0)
throw Stream_IO_Error("Unix_Server_Socket::close failed");
sockfd = -1;
}
}
/**
* Accept a new connection
*/
Socket* Unix_Server_Socket::accept()
{
// FIXME: grab IP of remote side, use gethostbyaddr, store as peer_id
int retval = ::accept(sockfd, 0, 0);
if(retval == -1)
throw Stream_IO_Error("Unix_Server_Socket: accept failed");
return new Unix_Socket(retval);
}
}
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