gvpe/src/sockinfo.C

/*
    sockinfo.C -- socket address management
    Copyright (C) 2003 Marc Lehmann <gvpe@schmorp.de>
    
    This file is part of GVPE.

    GVPE 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.
 
    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.
 
    You should have received a copy of the GNU General Public License
    along with gvpe; if not, write to the Free Software
    Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "config.h"

#include <netdb.h>

#include "gettext.h"

#include "sockinfo.h"
#include "slog.h"

// all ipv4-based protocols
#define PROTv4 (PROT_UDPv4 | PROT_TCPv4 | PROT_ICMPv4 | PROT_IPv4 | PROT_DNSv4)

void sockinfo::set (const sockaddr_in *sa, u8 prot_)
{
  host = sa->sin_addr.s_addr;
  port = prot_ & (PROT_IPv4 | PROT_ICMPv4) ? 0 : sa->sin_port;
  prot = prot_;
}

void sockinfo::set (const char *hostname, u16 port_, u8 prot_)
{
  prot = prot_;
  host = 0;
  port = htons (port_);

  if (prot & PROTv4
      && hostname)
    {
      struct hostent *he = gethostbyname (hostname);

      if (he
          && he->h_addrtype == AF_INET && he->h_length == 4 && he->h_addr_list[0])
        {
          //sa->sin_family = he->h_addrtype;
          memcpy (&host, he->h_addr_list[0], 4);
        }
      else
        slog (L_NOTICE, _("unable to resolve host '%s'"), hostname);
    }
}

void
sockinfo::set (const conf_node *conf, u8 prot_)
{
  if (prot_ == PROT_DNSv4)
    set (conf->dns_hostname, conf->dns_hostname ? conf->dns_port : 0, prot_);
  else
    set (conf->hostname,
         prot_ == PROT_UDPv4   ? conf->udp_port
         : prot_ == PROT_TCPv4 ? conf->tcp_port
         : prot_ == PROT_DNSv4 ? conf->dns_port
         : 0,
         prot_);
}

const sockaddr *
sockinfo::sav4() const
{
  static sockaddr_in sa;

  sa.sin_family      = AF_INET;
  sa.sin_port        = port;
  sa.sin_addr.s_addr = host;

  return (const sockaddr *)&sa;
}

static char hostport[10 + 15 + 1 + 5 + 1]; // proto / IPv4 : port

const char *
sockinfo::ntoa () const
{
  in_addr ia = { host };

  sprintf (hostport, "%.15s", inet_ntoa (ia));

  return hostport;
}

sockinfo::operator const char *() const
{
  in_addr ia = { host };

  sprintf (hostport, "%s/%.15s:%d", strprotocol (prot), inet_ntoa (ia), ntohs (port) & 0xffff);

  return hostport;
}

u8
sockinfo::supported_protocols (conf_node *conf)
{
  u8 protocols = prot;

  if (prot & (PROT_UDPv4 | PROT_TCPv4))
    protocols |= PROT_IPv4 | PROT_ICMPv4;

  if (conf
      && prot & PROTv4
      && conf->protocols & PROT_UDPv4
      && conf->udp_port)
    protocols |= PROT_UDPv4;

  if (conf
      && prot & PROTv4
      && conf->protocols & PROT_TCPv4
      && conf->tcp_port)
    protocols |= PROT_TCPv4;

  if (conf
      && prot & PROTv4
      && conf->protocols & PROT_DNSv4
      && conf->dns_port)
    protocols |= PROT_DNSv4;

  return protocols;
}

bool
sockinfo::upgrade_protocol (u8 prot_, conf_node *conf)
{
  if (prot_ == prot)
    return true;

  if (prot & PROTv4
      && prot_ & PROTv4)
    {
      if (prot_ & (PROT_IPv4 | PROT_ICMPv4))
        {
          prot = prot_;
          port = 0;
          return true;
        }

      if (conf
          && prot_ & PROT_UDPv4
          && conf->protocols & PROT_UDPv4
          && conf->udp_port)
        {
          prot = prot_;
          port = htons (conf->udp_port);
          return true;
        }

      if (conf
          && prot_ & PROT_TCPv4
          && conf->protocols & PROT_TCPv4
          && conf->tcp_port)
        {
          prot = prot_;
          port = htons (conf->tcp_port);
          return true;
        }

#if ENABLE_DNS
      if (conf
          && prot_ & PROT_DNSv4
          && conf->protocols & PROT_DNSv4
          && conf->dns_port)
        {
          set (::conf.dns_forw_host, ::conf.dns_forw_port, prot_);
          return true;
        }
#endif
    }

  return false;
}

bool
operator == (const sockinfo &a, const sockinfo &b)
{
  return a.host == b.host && a.port == b.port && a.prot == b.prot;
}

bool
operator < (const sockinfo &a, const sockinfo &b)
{
  return a.host < b.host
         || (a.host == b.host && (a.port < b.port
                                  || (a.port == b.port && a.prot < b.prot)));
}

Revision:	1.15
Committed:	Thu Mar 3 16:54:34 2005 UTC (19 years, 2 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.14:	+5 -3 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/*
2	pcg	1.4	sockinfo.C -- socket address management
3	pcg	1.15	Copyright (C) 2003 Marc Lehmann <gvpe@schmorp.de>
4	pcg	1.1
5	pcg	1.15	This file is part of GVPE.
6
7			GVPE is free software; you can redistribute it and/or modify
8	pcg	1.1	it under the terms of the GNU General Public License as published by
9			the Free Software Foundation; either version 2 of the License, or
10			(at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17			You should have received a copy of the GNU General Public License
18	pcg	1.15	along with gvpe; if not, write to the Free Software
19	pcg	1.1	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20			*/
21
22			#include "config.h"
23
24	pcg	1.2	#include <netdb.h>
25	pcg	1.1
26			#include "gettext.h"
27
28			#include "sockinfo.h"
29			#include "slog.h"
30
31	pcg	1.9	// all ipv4-based protocols
32	pcg	1.13	#define PROTv4 (PROT_UDPv4 \| PROT_TCPv4 \| PROT_ICMPv4 \| PROT_IPv4 \| PROT_DNSv4)
33	pcg	1.9
34	pcg	1.1	void sockinfo::set (const sockaddr_in *sa, u8 prot_)
35			{
36			host = sa->sin_addr.s_addr;
37	pcg	1.9	port = prot_ & (PROT_IPv4 \| PROT_ICMPv4) ? 0 : sa->sin_port;
38	pcg	1.1	prot = prot_;
39			}
40
41	pcg	1.8	void sockinfo::set (const char *hostname, u16 port_, u8 prot_)
42	pcg	1.1	{
43	pcg	1.3	prot = prot_;
44	pcg	1.1	host = 0;
45	pcg	1.8	port = htons (port_);
46	pcg	1.1
47	pcg	1.9	if (prot & PROTv4
48	pcg	1.8	&& hostname)
49	pcg	1.1	{
50	pcg	1.8	struct hostent *he = gethostbyname (hostname);
51	pcg	1.1
52			if (he
53			&& he->h_addrtype == AF_INET && he->h_length == 4 && he->h_addr_list[0])
54			{
55			//sa->sin_family = he->h_addrtype;
56			memcpy (&host, he->h_addr_list[0], 4);
57			}
58			else
59	pcg	1.8	slog (L_NOTICE, _("unable to resolve host '%s'"), hostname);
60	pcg	1.1	}
61			}
62
63	pcg	1.8	void
64			sockinfo::set (const conf_node *conf, u8 prot_)
65			{
66	pcg	1.14	if (prot_ == PROT_DNSv4)
67			set (conf->dns_hostname, conf->dns_hostname ? conf->dns_port : 0, prot_);
68			else
69			set (conf->hostname,
70			prot_ == PROT_UDPv4 ? conf->udp_port
71			: prot_ == PROT_TCPv4 ? conf->tcp_port
72			: prot_ == PROT_DNSv4 ? conf->dns_port
73			: 0,
74			prot_);
75	pcg	1.8	}
76	pcg	1.1
77			const sockaddr *
78			sockinfo::sav4() const
79			{
80			static sockaddr_in sa;
81
82			sa.sin_family = AF_INET;
83			sa.sin_port = port;
84			sa.sin_addr.s_addr = host;
85
86			return (const sockaddr *)&sa;
87			}
88
89	pcg	1.8	static char hostport[10 + 15 + 1 + 5 + 1]; // proto / IPv4 : port
90	pcg	1.1
91			const char *
92			sockinfo::ntoa () const
93			{
94			in_addr ia = { host };
95
96			sprintf (hostport, "%.15s", inet_ntoa (ia));
97
98			return hostport;
99			}
100
101			sockinfo::operator const char *() const
102			{
103			in_addr ia = { host };
104
105	pcg	1.4	sprintf (hostport, "%s/%.15s:%d", strprotocol (prot), inet_ntoa (ia), ntohs (port) & 0xffff);
106	pcg	1.1
107			return hostport;
108	pcg	1.4	}
109
110	pcg	1.5	u8
111			sockinfo::supported_protocols (conf_node *conf)
112			{
113			u8 protocols = prot;
114
115			if (prot & (PROT_UDPv4 \| PROT_TCPv4))
116	pcg	1.9	protocols \|= PROT_IPv4 \| PROT_ICMPv4;
117	pcg	1.5
118			if (conf
119	pcg	1.9	&& prot & PROTv4
120	pcg	1.5	&& conf->protocols & PROT_UDPv4
121			&& conf->udp_port)
122			protocols \|= PROT_UDPv4;
123
124			if (conf
125	pcg	1.9	&& prot & PROTv4
126	pcg	1.5	&& conf->protocols & PROT_TCPv4
127			&& conf->tcp_port)
128			protocols \|= PROT_TCPv4;
129	pcg	1.12
130			if (conf
131			&& prot & PROTv4
132	pcg	1.13	&& conf->protocols & PROT_DNSv4
133			&& conf->dns_port)
134	pcg	1.12	protocols \|= PROT_DNSv4;
135	pcg	1.5
136			return protocols;
137			}
138
139			bool
140			sockinfo::upgrade_protocol (u8 prot_, conf_node *conf)
141			{
142			if (prot_ == prot)
143			return true;
144
145	pcg	1.9	if (prot & PROTv4
146			&& prot_ & PROTv4)
147	pcg	1.5	{
148	pcg	1.9	if (prot_ & (PROT_IPv4 \| PROT_ICMPv4))
149	pcg	1.5	{
150			prot = prot_;
151			port = 0;
152			return true;
153			}
154
155			if (conf
156			&& prot_ & PROT_UDPv4
157			&& conf->protocols & PROT_UDPv4
158			&& conf->udp_port)
159			{
160			prot = prot_;
161	pcg	1.6	port = htons (conf->udp_port);
162	pcg	1.5	return true;
163			}
164
165			if (conf
166			&& prot_ & PROT_TCPv4
167			&& conf->protocols & PROT_TCPv4
168			&& conf->tcp_port)
169			{
170			prot = prot_;
171	pcg	1.6	port = htons (conf->tcp_port);
172	pcg	1.5	return true;
173			}
174	pcg	1.13
175	pcg	1.14	#if ENABLE_DNS
176	pcg	1.13	if (conf
177			&& prot_ & PROT_DNSv4
178			&& conf->protocols & PROT_DNSv4
179			&& conf->dns_port)
180			{
181			set (::conf.dns_forw_host, ::conf.dns_forw_port, prot_);
182			return true;
183			}
184	pcg	1.14	#endif
185	pcg	1.5	}
186
187			return false;
188			}
189
190	pcg	1.4	bool
191			operator == (const sockinfo &a, const sockinfo &b)
192			{
193			return a.host == b.host && a.port == b.port && a.prot == b.prot;
194			}
195
196			bool
197			operator < (const sockinfo &a, const sockinfo &b)
198			{
199			return a.host < b.host
200			\|\| (a.host == b.host && (a.port < b.port
201			\|\| (a.port == b.port && a.prot < b.prot)));
202	pcg	1.1	}
203