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53c550d894
The ioctl SIOCGIFCONF does not return IPv6 addresses, so this function does not work for IPv6 addresses. Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
/*
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ctdb system specific code to manage raw sockets on linux
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Copyright (C) Ronnie Sahlberg 2007
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Copyright (C) Andrew Tridgell 2007
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "replace.h"
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#include "system/network.h"
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#include "lib/util/debug.h"
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#include "protocol/protocol.h"
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#include "common/logging.h"
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#include "common/system.h"
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/*
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uint16 checksum for n bytes
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*/
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uint32_t uint16_checksum(uint16_t *data, size_t n)
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{
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uint32_t sum=0;
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while (n>=2) {
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sum += (uint32_t)ntohs(*data);
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data++;
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n -= 2;
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}
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if (n == 1) {
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sum += (uint32_t)ntohs(*(uint8_t *)data);
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}
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return sum;
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}
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/*
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see if we currently have an interface with the given IP
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we try to bind to it, and if that fails then we don't have that IP
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on an interface
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*/
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bool ctdb_sys_have_ip(ctdb_sock_addr *_addr)
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{
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int s;
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int ret;
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ctdb_sock_addr __addr = *_addr;
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ctdb_sock_addr *addr = &__addr;
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socklen_t addrlen = 0;
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switch (addr->sa.sa_family) {
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case AF_INET:
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addr->ip.sin_port = 0;
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addrlen = sizeof(struct sockaddr_in);
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break;
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case AF_INET6:
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addr->ip6.sin6_port = 0;
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addrlen = sizeof(struct sockaddr_in6);
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break;
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}
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s = socket(addr->sa.sa_family, SOCK_STREAM, IPPROTO_TCP);
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if (s == -1) {
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return false;
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}
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ret = bind(s, (struct sockaddr *)addr, addrlen);
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close(s);
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return ret == 0;
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}
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