142 lines
3.3 KiB
C++
142 lines
3.3 KiB
C++
// src/ip.cc
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// This file is part of libpbe; see http://decimail.org
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// (C) 2004-2007 Philip Endecott
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#include "ip.hh"
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <netdb.h>
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#include <unistd.h>
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using namespace std;
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namespace pbe {
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ostream& operator<<(ostream& s, struct in_addr ip)
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{
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uint32_t i = ntohl(ip.s_addr);
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s << ((i&0xff000000)>>24)
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<< '.' << ((i&0x00ff0000)>>16)
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<< '.' << ((i&0x0000ff00)>>8)
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<< '.' << (i&0x000000ff);
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return s;
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}
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void HostLookupError::report(ostream& s) const {
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s << "host name lookup failed for " << hostname << ": "
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<< gai_strerror(error_code) << endl;
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}
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struct in_addr get_ip_address(string hostname)
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{
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struct addrinfo ai;
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memset(&ai, 0, sizeof(ai));
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ai.ai_family = AF_INET;
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struct addrinfo* res;
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int rc = getaddrinfo(hostname.c_str(), "", &ai, &res);
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if (rc) {
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throw HostLookupError(hostname,rc);
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}
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struct in_addr result = ((sockaddr_in *)(res->ai_addr))->sin_addr;
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freeaddrinfo(res);
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return result;
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}
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string get_own_hostname(void)
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{
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char name[256];
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int rc = gethostname(name,sizeof(name));
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if (rc!=0) {
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throw_ErrnoException("gethostname()");
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}
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struct addrinfo ai;
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memset(&ai, 0, sizeof(ai));
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ai. ai_flags = AI_CANONNAME;
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ai.ai_family = AF_INET;
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struct addrinfo* res;
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// FIXME Is there any way to specify a timeout?
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rc = getaddrinfo(name, "", &ai, &res);
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if (rc) {
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throw HostLookupError(name,rc);
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}
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string result(res->ai_canonname);
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freeaddrinfo(res);
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return result;
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}
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int tcp_client_connect(string server_name, int port)
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{
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struct sockaddr_in addr;
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addr.sin_family = AF_INET;
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addr.sin_addr = get_ip_address(server_name);
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addr.sin_port = htons(port);
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int fd = socket(PF_INET,SOCK_STREAM,0);
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if (fd==-1) {
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throw_ErrnoException("socket()");
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}
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// FIXME if we wanted to detect a timeout here we should make fd nonblocking;
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// this will cause connect() to return with errno==EINPROGRESS; we then select()
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// until fd is writeable (or times out), at which point we call getsockopt(SO_ERROR)
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// to get any connect error.
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int rc = connect(fd, (struct sockaddr*)&addr, sizeof(addr));
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if (rc==-1) {
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throw_ErrnoException("connect()");
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}
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return fd;
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}
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int local_client_connect(string address)
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{
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struct sockaddr_un addr;
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addr.sun_family = AF_LOCAL;
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strcpy(addr.sun_path,address.c_str());
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int fd = socket(PF_LOCAL,SOCK_STREAM,0);
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if (fd==-1) {
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throw_ErrnoException("socket()");
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}
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int rc = connect(fd, (struct sockaddr*)&addr, SUN_LEN(&addr));
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if (rc==-1) {
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throw_ErrnoException("connect()");
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}
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return fd;
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}
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};
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