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/* This file is part of GNU Dico.
Copyright (C) 1998, 1999, 2000, 2008, 2010 Sergey Poznyakoff
GNU Dico 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 3, or (at your option)
any later version.
GNU Dico 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 GNU Dico. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/un.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <intprops.h>
#include <inttostr.h>
#include <xdico.h>
#include <xalloc.h>
/*
* Return an IP address in host long notation from a host
* name or address in dot notation.
*/
IPADDR
get_ipaddr(char *host)
{
struct hostent *hp;
struct in_addr addr;
if (inet_aton(host, &addr))
return ntohl(addr.s_addr);
else if ((hp = gethostbyname(host)) == NULL)
return 0;
else
return ntohl(*(UINT4 *) hp->h_addr);
}
/*
* Return a printable host name (or IP address in dot notation)
* for the supplied IP address.
*/
char *
ip_hostname(IPADDR ipaddr)
{
struct hostent *hp;
UINT4 n_ipaddr;
n_ipaddr = htonl(ipaddr);
hp = gethostbyaddr((char *) &n_ipaddr, sizeof(struct in_addr),
AF_INET);
if (!hp) {
struct in_addr in;
in.s_addr = htonl(ipaddr);
return inet_ntoa(in);
}
return (char *) hp->h_name;
}
IPADDR
getmyip()
{
char myname[256];
gethostname(myname, sizeof(myname));
return get_ipaddr(myname);
}
int
str2port(char *str)
{
struct servent *serv;
char *p;
int port;
/* First try to read it from /etc/services */
serv = getservbyname(str, "tcp");
if (serv != NULL)
port = ntohs(serv->s_port);
else {
long l;
/* Not in services, maybe a number? */
l = strtol(str, &p, 0);
if (*p || l < 0 || l > USHRT_MAX)
return -1;
port = l;
}
return port;
}
static size_t
mu_stpcpy (char **pbuf, size_t *psize, const char *src)
{
size_t slen = strlen (src);
if (pbuf == NULL || *pbuf == NULL)
return slen;
else {
char *buf = *pbuf;
size_t size = *psize;
if (size > slen)
size = slen;
memcpy (buf, src, size);
*psize -= size;
*pbuf += size;
if (*psize)
**pbuf = 0;
else
(*pbuf)[-1] = 0;
return size;
}
}
#define S_UN_NAME(sa, salen) \
((salen < offsetof (struct sockaddr_un,sun_path)) ? "" : (sa)->sun_path)
void
sockaddr_to_str (const struct sockaddr *sa, int salen,
char *bufptr, size_t buflen,
size_t *plen)
{
char buf[INT_BUFSIZE_BOUND (uintmax_t)]; /* FIXME: too much */
size_t len = 0;
switch (sa->sa_family) {
case AF_INET:
{
struct sockaddr_in s_in = *(struct sockaddr_in *)sa;
len += mu_stpcpy (&bufptr, &buflen, inet_ntoa(s_in.sin_addr));
len += mu_stpcpy (&bufptr, &buflen, ":");
len += mu_stpcpy (&bufptr, &buflen, umaxtostr(ntohs (s_in.sin_port),
buf));
break;
}
case AF_UNIX:
{
struct sockaddr_un *s_un = (struct sockaddr_un *)sa;
if (S_UN_NAME(s_un, salen)[0] == 0)
len += mu_stpcpy (&bufptr, &buflen, "anonymous socket");
else {
len += mu_stpcpy (&bufptr, &buflen, "socket ");
len += mu_stpcpy (&bufptr, &buflen, s_un->sun_path);
}
break;
}
default:
len += mu_stpcpy (&bufptr, &buflen, "{Unsupported family: ");
len += mu_stpcpy (&bufptr, &buflen, umaxtostr (sa->sa_family, buf));
len += mu_stpcpy (&bufptr, &buflen, "}");
}
if (plen)
*plen = len + 1;
}
char *
sockaddr_to_astr (const struct sockaddr *sa, int salen)
{
size_t size;
char *p;
sockaddr_to_str(sa, salen, NULL, 0, &size);
p = xmalloc(size);
sockaddr_to_str(sa, salen, p, size, NULL);
return p;
}
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