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5a54df971e
2006-02-21 Paul Jakma <paul.jakma@sun.com>
* sockunion.c: (sockunion_{su2str,log}) Use XSTRDUP.
Particularly with _su2str, as that string gets XFREEd,
which can be annoying if run debug code in memory.c.
762 lines
16 KiB
C
762 lines
16 KiB
C
/* Socket union related function.
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* Copyright (c) 1997, 98 Kunihiro Ishiguro
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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 GNU Zebra; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#include <zebra.h>
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#include "prefix.h"
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#include "vty.h"
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#include "sockunion.h"
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#include "memory.h"
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#include "str.h"
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#include "log.h"
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#ifndef HAVE_INET_ATON
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int
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inet_aton (const char *cp, struct in_addr *inaddr)
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{
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int dots = 0;
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register u_long addr = 0;
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register u_long val = 0, base = 10;
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do
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{
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register char c = *cp;
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switch (c)
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{
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case '0': case '1': case '2': case '3': case '4': case '5':
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case '6': case '7': case '8': case '9':
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val = (val * base) + (c - '0');
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break;
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case '.':
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if (++dots > 3)
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return 0;
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case '\0':
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if (val > 255)
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return 0;
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addr = addr << 8 | val;
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val = 0;
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break;
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default:
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return 0;
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}
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} while (*cp++) ;
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if (dots < 3)
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addr <<= 8 * (3 - dots);
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if (inaddr)
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inaddr->s_addr = htonl (addr);
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return 1;
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}
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#endif /* ! HAVE_INET_ATON */
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#ifndef HAVE_INET_PTON
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int
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inet_pton (int family, const char *strptr, void *addrptr)
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{
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if (family == AF_INET)
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{
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struct in_addr in_val;
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if (inet_aton (strptr, &in_val))
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{
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memcpy (addrptr, &in_val, sizeof (struct in_addr));
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return 1;
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}
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return 0;
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}
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errno = EAFNOSUPPORT;
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return -1;
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}
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#endif /* ! HAVE_INET_PTON */
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#ifndef HAVE_INET_NTOP
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const char *
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inet_ntop (int family, const void *addrptr, char *strptr, size_t len)
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{
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unsigned char *p = (unsigned char *) addrptr;
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if (family == AF_INET)
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{
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char temp[INET_ADDRSTRLEN];
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snprintf(temp, sizeof(temp), "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
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if (strlen(temp) >= len)
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{
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errno = ENOSPC;
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return NULL;
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}
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strcpy(strptr, temp);
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return strptr;
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}
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errno = EAFNOSUPPORT;
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return NULL;
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}
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#endif /* ! HAVE_INET_NTOP */
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const char *
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inet_sutop (union sockunion *su, char *str)
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{
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switch (su->sa.sa_family)
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{
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case AF_INET:
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inet_ntop (AF_INET, &su->sin.sin_addr, str, INET_ADDRSTRLEN);
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break;
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#ifdef HAVE_IPV6
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case AF_INET6:
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inet_ntop (AF_INET6, &su->sin6.sin6_addr, str, INET6_ADDRSTRLEN);
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break;
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#endif /* HAVE_IPV6 */
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}
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return str;
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}
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int
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str2sockunion (const char *str, union sockunion *su)
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{
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int ret;
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memset (su, 0, sizeof (union sockunion));
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ret = inet_pton (AF_INET, str, &su->sin.sin_addr);
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if (ret > 0) /* Valid IPv4 address format. */
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{
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su->sin.sin_family = AF_INET;
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#ifdef HAVE_SIN_LEN
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su->sin.sin_len = sizeof(struct sockaddr_in);
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#endif /* HAVE_SIN_LEN */
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return 0;
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}
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#ifdef HAVE_IPV6
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ret = inet_pton (AF_INET6, str, &su->sin6.sin6_addr);
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if (ret > 0) /* Valid IPv6 address format. */
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{
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su->sin6.sin6_family = AF_INET6;
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#ifdef SIN6_LEN
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su->sin6.sin6_len = sizeof(struct sockaddr_in6);
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#endif /* SIN6_LEN */
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return 0;
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}
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#endif /* HAVE_IPV6 */
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return -1;
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}
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const char *
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sockunion2str (union sockunion *su, char *buf, size_t len)
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{
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if (su->sa.sa_family == AF_INET)
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return inet_ntop (AF_INET, &su->sin.sin_addr, buf, len);
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#ifdef HAVE_IPV6
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else if (su->sa.sa_family == AF_INET6)
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return inet_ntop (AF_INET6, &su->sin6.sin6_addr, buf, len);
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#endif /* HAVE_IPV6 */
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return NULL;
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}
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union sockunion *
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sockunion_str2su (const char *str)
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{
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int ret;
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union sockunion *su;
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su = XMALLOC (MTYPE_SOCKUNION, sizeof (union sockunion));
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memset (su, 0, sizeof (union sockunion));
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ret = inet_pton (AF_INET, str, &su->sin.sin_addr);
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if (ret > 0) /* Valid IPv4 address format. */
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{
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su->sin.sin_family = AF_INET;
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#ifdef HAVE_SIN_LEN
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su->sin.sin_len = sizeof(struct sockaddr_in);
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#endif /* HAVE_SIN_LEN */
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return su;
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}
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#ifdef HAVE_IPV6
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ret = inet_pton (AF_INET6, str, &su->sin6.sin6_addr);
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if (ret > 0) /* Valid IPv6 address format. */
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{
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su->sin6.sin6_family = AF_INET6;
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#ifdef SIN6_LEN
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su->sin6.sin6_len = sizeof(struct sockaddr_in6);
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#endif /* SIN6_LEN */
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return su;
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}
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#endif /* HAVE_IPV6 */
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XFREE (MTYPE_SOCKUNION, su);
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return NULL;
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}
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char *
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sockunion_su2str (union sockunion *su)
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{
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char str[SU_ADDRSTRLEN];
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switch (su->sa.sa_family)
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{
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case AF_INET:
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inet_ntop (AF_INET, &su->sin.sin_addr, str, sizeof (str));
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break;
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#ifdef HAVE_IPV6
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case AF_INET6:
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inet_ntop (AF_INET6, &su->sin6.sin6_addr, str, sizeof (str));
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break;
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#endif /* HAVE_IPV6 */
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}
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return XSTRDUP (MTYPE_TMP, str);
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}
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/* Return socket of sockunion. */
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int
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sockunion_socket (union sockunion *su)
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{
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int sock;
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sock = socket (su->sa.sa_family, SOCK_STREAM, 0);
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if (sock < 0)
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{
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zlog (NULL, LOG_WARNING, "Can't make socket : %s", safe_strerror (errno));
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return -1;
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}
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return sock;
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}
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/* Return accepted new socket file descriptor. */
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int
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sockunion_accept (int sock, union sockunion *su)
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{
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socklen_t len;
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int client_sock;
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len = sizeof (union sockunion);
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client_sock = accept (sock, (struct sockaddr *) su, &len);
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/* Convert IPv4 compatible IPv6 address to IPv4 address. */
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#ifdef HAVE_IPV6
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if (su->sa.sa_family == AF_INET6)
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{
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if (IN6_IS_ADDR_V4MAPPED (&su->sin6.sin6_addr))
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{
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struct sockaddr_in sin;
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memset (&sin, 0, sizeof (struct sockaddr_in));
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sin.sin_family = AF_INET;
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memcpy (&sin.sin_addr, ((char *)&su->sin6.sin6_addr) + 12, 4);
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memcpy (su, &sin, sizeof (struct sockaddr_in));
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}
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}
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#endif /* HAVE_IPV6 */
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return client_sock;
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}
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/* Return sizeof union sockunion. */
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static int
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sockunion_sizeof (union sockunion *su)
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{
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int ret;
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ret = 0;
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switch (su->sa.sa_family)
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{
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case AF_INET:
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ret = sizeof (struct sockaddr_in);
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break;
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#ifdef HAVE_IPV6
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case AF_INET6:
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ret = sizeof (struct sockaddr_in6);
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break;
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#endif /* AF_INET6 */
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}
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return ret;
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}
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/* return sockunion structure : this function should be revised. */
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static char *
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sockunion_log (union sockunion *su)
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{
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static char buf[SU_ADDRSTRLEN];
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switch (su->sa.sa_family)
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{
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case AF_INET:
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snprintf (buf, SU_ADDRSTRLEN, "%s", inet_ntoa (su->sin.sin_addr));
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break;
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#ifdef HAVE_IPV6
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case AF_INET6:
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snprintf (buf, SU_ADDRSTRLEN, "%s",
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inet_ntop (AF_INET6, &(su->sin6.sin6_addr), buf, SU_ADDRSTRLEN));
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break;
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#endif /* HAVE_IPV6 */
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default:
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snprintf (buf, SU_ADDRSTRLEN, "af_unknown %d ", su->sa.sa_family);
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break;
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}
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return (XSTRDUP (MTYPE_TMP, buf));
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}
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/* sockunion_connect returns
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-1 : error occured
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0 : connect success
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1 : connect is in progress */
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enum connect_result
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sockunion_connect (int fd, union sockunion *peersu, unsigned short port,
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unsigned int ifindex)
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{
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int ret;
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int val;
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union sockunion su;
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memcpy (&su, peersu, sizeof (union sockunion));
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switch (su.sa.sa_family)
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{
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case AF_INET:
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su.sin.sin_port = port;
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break;
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#ifdef HAVE_IPV6
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case AF_INET6:
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su.sin6.sin6_port = port;
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#ifdef KAME
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if (IN6_IS_ADDR_LINKLOCAL(&su.sin6.sin6_addr) && ifindex)
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{
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#ifdef HAVE_SIN6_SCOPE_ID
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/* su.sin6.sin6_scope_id = ifindex; */
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#ifdef MUSICA
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su.sin6.sin6_scope_id = ifindex;
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#endif
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#endif /* HAVE_SIN6_SCOPE_ID */
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#ifndef MUSICA
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SET_IN6_LINKLOCAL_IFINDEX (su.sin6.sin6_addr, ifindex);
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#endif
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}
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#endif /* KAME */
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break;
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#endif /* HAVE_IPV6 */
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}
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/* Make socket non-block. */
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val = fcntl (fd, F_GETFL, 0);
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fcntl (fd, F_SETFL, val|O_NONBLOCK);
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/* Call connect function. */
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ret = connect (fd, (struct sockaddr *) &su, sockunion_sizeof (&su));
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/* Immediate success */
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if (ret == 0)
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{
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fcntl (fd, F_SETFL, val);
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return connect_success;
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}
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/* If connect is in progress then return 1 else it's real error. */
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if (ret < 0)
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{
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if (errno != EINPROGRESS)
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{
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zlog_info ("can't connect to %s fd %d : %s",
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sockunion_log (&su), fd, safe_strerror (errno));
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return connect_error;
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}
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}
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fcntl (fd, F_SETFL, val);
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return connect_in_progress;
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}
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/* Make socket from sockunion union. */
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int
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sockunion_stream_socket (union sockunion *su)
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{
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int sock;
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if (su->sa.sa_family == 0)
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su->sa.sa_family = AF_INET_UNION;
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sock = socket (su->sa.sa_family, SOCK_STREAM, 0);
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if (sock < 0)
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zlog (NULL, LOG_WARNING, "can't make socket sockunion_stream_socket");
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return sock;
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}
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/* Bind socket to specified address. */
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int
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sockunion_bind (int sock, union sockunion *su, unsigned short port,
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union sockunion *su_addr)
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{
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int size = 0;
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int ret;
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if (su->sa.sa_family == AF_INET)
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{
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size = sizeof (struct sockaddr_in);
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su->sin.sin_port = htons (port);
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#ifdef HAVE_SIN_LEN
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su->sin.sin_len = size;
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#endif /* HAVE_SIN_LEN */
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if (su_addr == NULL)
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su->sin.sin_addr.s_addr = htonl (INADDR_ANY);
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}
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#ifdef HAVE_IPV6
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else if (su->sa.sa_family == AF_INET6)
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{
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size = sizeof (struct sockaddr_in6);
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su->sin6.sin6_port = htons (port);
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#ifdef SIN6_LEN
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su->sin6.sin6_len = size;
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#endif /* SIN6_LEN */
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if (su_addr == NULL)
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{
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#if defined(LINUX_IPV6) || defined(NRL)
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memset (&su->sin6.sin6_addr, 0, sizeof (struct in6_addr));
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#else
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su->sin6.sin6_addr = in6addr_any;
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#endif /* LINUX_IPV6 */
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}
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}
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#endif /* HAVE_IPV6 */
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ret = bind (sock, (struct sockaddr *)su, size);
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if (ret < 0)
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zlog (NULL, LOG_WARNING, "can't bind socket : %s", safe_strerror (errno));
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return ret;
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}
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int
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sockopt_reuseaddr (int sock)
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{
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int ret;
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int on = 1;
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ret = setsockopt (sock, SOL_SOCKET, SO_REUSEADDR,
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(void *) &on, sizeof (on));
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if (ret < 0)
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{
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zlog (NULL, LOG_WARNING, "can't set sockopt SO_REUSEADDR to socket %d", sock);
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return -1;
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}
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return 0;
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}
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#ifdef SO_REUSEPORT
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int
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sockopt_reuseport (int sock)
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{
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int ret;
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int on = 1;
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ret = setsockopt (sock, SOL_SOCKET, SO_REUSEPORT,
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(void *) &on, sizeof (on));
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if (ret < 0)
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{
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zlog (NULL, LOG_WARNING, "can't set sockopt SO_REUSEPORT to socket %d", sock);
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return -1;
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}
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return 0;
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}
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#else
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int
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sockopt_reuseport (int sock)
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{
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return 0;
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}
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#endif /* 0 */
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int
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sockopt_ttl (int family, int sock, int ttl)
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{
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int ret;
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#ifdef IP_TTL
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if (family == AF_INET)
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{
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ret = setsockopt (sock, IPPROTO_IP, IP_TTL,
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(void *) &ttl, sizeof (int));
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if (ret < 0)
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{
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zlog (NULL, LOG_WARNING, "can't set sockopt IP_TTL %d to socket %d", ttl, sock);
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return -1;
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}
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return 0;
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}
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#endif /* IP_TTL */
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#ifdef HAVE_IPV6
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if (family == AF_INET6)
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{
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ret = setsockopt (sock, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
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(void *) &ttl, sizeof (int));
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if (ret < 0)
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{
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zlog (NULL, LOG_WARNING, "can't set sockopt IPV6_UNICAST_HOPS %d to socket %d",
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ttl, sock);
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return -1;
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}
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return 0;
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}
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#endif /* HAVE_IPV6 */
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return 0;
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}
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/* If same family and same prefix return 1. */
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int
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sockunion_same (union sockunion *su1, union sockunion *su2)
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{
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int ret = 0;
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if (su1->sa.sa_family != su2->sa.sa_family)
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return 0;
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switch (su1->sa.sa_family)
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{
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case AF_INET:
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ret = memcmp (&su1->sin.sin_addr, &su2->sin.sin_addr,
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sizeof (struct in_addr));
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break;
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#ifdef HAVE_IPV6
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case AF_INET6:
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ret = memcmp (&su1->sin6.sin6_addr, &su2->sin6.sin6_addr,
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sizeof (struct in6_addr));
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break;
|
|
#endif /* HAVE_IPV6 */
|
|
}
|
|
if (ret == 0)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* After TCP connection is established. Get local address and port. */
|
|
union sockunion *
|
|
sockunion_getsockname (int fd)
|
|
{
|
|
int ret;
|
|
socklen_t len;
|
|
union
|
|
{
|
|
struct sockaddr sa;
|
|
struct sockaddr_in sin;
|
|
#ifdef HAVE_IPV6
|
|
struct sockaddr_in6 sin6;
|
|
#endif /* HAVE_IPV6 */
|
|
char tmp_buffer[128];
|
|
} name;
|
|
union sockunion *su;
|
|
|
|
memset (&name, 0, sizeof name);
|
|
len = sizeof name;
|
|
|
|
ret = getsockname (fd, (struct sockaddr *)&name, &len);
|
|
if (ret < 0)
|
|
{
|
|
zlog_warn ("Can't get local address and port by getsockname: %s",
|
|
safe_strerror (errno));
|
|
return NULL;
|
|
}
|
|
|
|
if (name.sa.sa_family == AF_INET)
|
|
{
|
|
su = XCALLOC (MTYPE_SOCKUNION, sizeof (union sockunion));
|
|
memcpy (su, &name, sizeof (struct sockaddr_in));
|
|
return su;
|
|
}
|
|
#ifdef HAVE_IPV6
|
|
if (name.sa.sa_family == AF_INET6)
|
|
{
|
|
su = XCALLOC (MTYPE_SOCKUNION, sizeof (union sockunion));
|
|
memcpy (su, &name, sizeof (struct sockaddr_in6));
|
|
|
|
if (IN6_IS_ADDR_V4MAPPED (&su->sin6.sin6_addr))
|
|
{
|
|
struct sockaddr_in sin;
|
|
|
|
sin.sin_family = AF_INET;
|
|
memcpy (&sin.sin_addr, ((char *)&su->sin6.sin6_addr) + 12, 4);
|
|
sin.sin_port = su->sin6.sin6_port;
|
|
memcpy (su, &sin, sizeof (struct sockaddr_in));
|
|
}
|
|
return su;
|
|
}
|
|
#endif /* HAVE_IPV6 */
|
|
return NULL;
|
|
}
|
|
|
|
/* After TCP connection is established. Get remote address and port. */
|
|
union sockunion *
|
|
sockunion_getpeername (int fd)
|
|
{
|
|
int ret;
|
|
socklen_t len;
|
|
union
|
|
{
|
|
struct sockaddr sa;
|
|
struct sockaddr_in sin;
|
|
#ifdef HAVE_IPV6
|
|
struct sockaddr_in6 sin6;
|
|
#endif /* HAVE_IPV6 */
|
|
char tmp_buffer[128];
|
|
} name;
|
|
union sockunion *su;
|
|
|
|
memset (&name, 0, sizeof name);
|
|
len = sizeof name;
|
|
ret = getpeername (fd, (struct sockaddr *)&name, &len);
|
|
if (ret < 0)
|
|
{
|
|
zlog (NULL, LOG_WARNING, "Can't get remote address and port: %s",
|
|
safe_strerror (errno));
|
|
return NULL;
|
|
}
|
|
|
|
if (name.sa.sa_family == AF_INET)
|
|
{
|
|
su = XCALLOC (MTYPE_SOCKUNION, sizeof (union sockunion));
|
|
memcpy (su, &name, sizeof (struct sockaddr_in));
|
|
return su;
|
|
}
|
|
#ifdef HAVE_IPV6
|
|
if (name.sa.sa_family == AF_INET6)
|
|
{
|
|
su = XCALLOC (MTYPE_SOCKUNION, sizeof (union sockunion));
|
|
memcpy (su, &name, sizeof (struct sockaddr_in6));
|
|
|
|
if (IN6_IS_ADDR_V4MAPPED (&su->sin6.sin6_addr))
|
|
{
|
|
struct sockaddr_in sin;
|
|
|
|
sin.sin_family = AF_INET;
|
|
memcpy (&sin.sin_addr, ((char *)&su->sin6.sin6_addr) + 12, 4);
|
|
sin.sin_port = su->sin6.sin6_port;
|
|
memcpy (su, &sin, sizeof (struct sockaddr_in));
|
|
}
|
|
return su;
|
|
}
|
|
#endif /* HAVE_IPV6 */
|
|
return NULL;
|
|
}
|
|
|
|
/* Print sockunion structure */
|
|
static void __attribute__ ((unused))
|
|
sockunion_print (union sockunion *su)
|
|
{
|
|
if (su == NULL)
|
|
return;
|
|
|
|
switch (su->sa.sa_family)
|
|
{
|
|
case AF_INET:
|
|
printf ("%s\n", inet_ntoa (su->sin.sin_addr));
|
|
break;
|
|
#ifdef HAVE_IPV6
|
|
case AF_INET6:
|
|
{
|
|
char buf [SU_ADDRSTRLEN];
|
|
|
|
printf ("%s\n", inet_ntop (AF_INET6, &(su->sin6.sin6_addr),
|
|
buf, sizeof (buf)));
|
|
}
|
|
break;
|
|
#endif /* HAVE_IPV6 */
|
|
|
|
#ifdef AF_LINK
|
|
case AF_LINK:
|
|
{
|
|
struct sockaddr_dl *sdl;
|
|
|
|
sdl = (struct sockaddr_dl *)&(su->sa);
|
|
printf ("link#%d\n", sdl->sdl_index);
|
|
}
|
|
break;
|
|
#endif /* AF_LINK */
|
|
default:
|
|
printf ("af_unknown %d\n", su->sa.sa_family);
|
|
break;
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_IPV6
|
|
static int
|
|
in6addr_cmp (struct in6_addr *addr1, struct in6_addr *addr2)
|
|
{
|
|
unsigned int i;
|
|
u_char *p1, *p2;
|
|
|
|
p1 = (u_char *)addr1;
|
|
p2 = (u_char *)addr2;
|
|
|
|
for (i = 0; i < sizeof (struct in6_addr); i++)
|
|
{
|
|
if (p1[i] > p2[i])
|
|
return 1;
|
|
else if (p1[i] < p2[i])
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif /* HAVE_IPV6 */
|
|
|
|
int
|
|
sockunion_cmp (union sockunion *su1, union sockunion *su2)
|
|
{
|
|
if (su1->sa.sa_family > su2->sa.sa_family)
|
|
return 1;
|
|
if (su1->sa.sa_family < su2->sa.sa_family)
|
|
return -1;
|
|
|
|
if (su1->sa.sa_family == AF_INET)
|
|
{
|
|
if (ntohl (su1->sin.sin_addr.s_addr) == ntohl (su2->sin.sin_addr.s_addr))
|
|
return 0;
|
|
if (ntohl (su1->sin.sin_addr.s_addr) > ntohl (su2->sin.sin_addr.s_addr))
|
|
return 1;
|
|
else
|
|
return -1;
|
|
}
|
|
#ifdef HAVE_IPV6
|
|
if (su1->sa.sa_family == AF_INET6)
|
|
return in6addr_cmp (&su1->sin6.sin6_addr, &su2->sin6.sin6_addr);
|
|
#endif /* HAVE_IPV6 */
|
|
return 0;
|
|
}
|
|
|
|
/* Duplicate sockunion. */
|
|
union sockunion *
|
|
sockunion_dup (union sockunion *su)
|
|
{
|
|
union sockunion *dup = XCALLOC (MTYPE_SOCKUNION, sizeof (union sockunion));
|
|
memcpy (dup, su, sizeof (union sockunion));
|
|
return dup;
|
|
}
|
|
|
|
void
|
|
sockunion_free (union sockunion *su)
|
|
{
|
|
XFREE (MTYPE_SOCKUNION, su);
|
|
}
|