![ken@kmackay.local](/assets/img/avatar_default.png)
3 changed files with 655 additions and 1 deletions
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android-ifaddrs |
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=============== |
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An implementation of getifaddrs() for Android. |
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An implementation of getifaddrs() for Android, since the NDK does not natively support it. Works just like you would expect on regular Linux. License information is present in each file. |
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/*
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Copyright (c) 2013, Kenneth MacKay |
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All rights reserved. |
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Redistribution and use in source and binary forms, with or without modification, |
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are permitted provided that the following conditions are met: |
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* Redistributions of source code must retain the above copyright notice, this |
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list of conditions and the following disclaimer. |
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* Redistributions in binary form must reproduce the above copyright notice, |
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this list of conditions and the following disclaimer in the documentation |
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and/or other materials provided with the distribution. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR |
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "ifaddrs.h" |
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#include <string.h> |
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#include <stdlib.h> |
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#include <errno.h> |
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#include <unistd.h> |
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#include <sys/socket.h> |
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#include <net/if_arp.h> |
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#include <netinet/in.h> |
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#include <linux/netlink.h> |
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#include <linux/rtnetlink.h> |
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typedef struct NetlinkList |
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{ |
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struct NetlinkList *m_next; |
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struct nlmsghdr *m_data; |
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unsigned int m_size; |
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} NetlinkList; |
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static int netlink_socket(void) |
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{ |
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int l_socket = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE); |
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if(l_socket < 0) |
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{ |
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return -1; |
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} |
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struct sockaddr_nl l_addr; |
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memset(&l_addr, 0, sizeof(l_addr)); |
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l_addr.nl_family = AF_NETLINK; |
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if(bind(l_socket, (struct sockaddr *)&l_addr, sizeof(l_addr)) < 0) |
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{ |
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close(l_socket); |
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return -1; |
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} |
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return l_socket; |
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} |
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static int netlink_send(int p_socket, int p_request) |
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{ |
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char l_buffer[NLMSG_ALIGN(sizeof(struct nlmsghdr)) + NLMSG_ALIGN(sizeof(struct rtgenmsg))]; |
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memset(l_buffer, 0, sizeof(l_buffer)); |
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struct nlmsghdr *l_hdr = (struct nlmsghdr *)l_buffer; |
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struct rtgenmsg *l_msg = (struct rtgenmsg *)NLMSG_DATA(l_hdr); |
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l_hdr->nlmsg_len = NLMSG_LENGTH(sizeof(*l_msg)); |
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l_hdr->nlmsg_type = p_request; |
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l_hdr->nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
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l_hdr->nlmsg_pid = 0; |
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l_hdr->nlmsg_seq = p_socket; |
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l_msg->rtgen_family = AF_UNSPEC; |
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struct sockaddr_nl l_addr; |
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memset(&l_addr, 0, sizeof(l_addr)); |
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l_addr.nl_family = AF_NETLINK; |
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return (sendto(p_socket, l_hdr, l_hdr->nlmsg_len, 0, (struct sockaddr *)&l_addr, sizeof(l_addr))); |
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} |
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static int netlink_recv(int p_socket, void *p_buffer, size_t p_len) |
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{ |
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struct msghdr l_msg; |
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struct iovec l_iov = { p_buffer, p_len }; |
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struct sockaddr_nl l_addr; |
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int l_result; |
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for(;;) |
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{ |
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l_msg.msg_name = (void *)&l_addr; |
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l_msg.msg_namelen = sizeof(l_addr); |
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l_msg.msg_iov = &l_iov; |
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l_msg.msg_iovlen = 1; |
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l_msg.msg_control = NULL; |
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l_msg.msg_controllen = 0; |
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l_msg.msg_flags = 0; |
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int l_result = recvmsg(p_socket, &l_msg, 0); |
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if(l_result < 0) |
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{ |
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if(errno == EINTR) |
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{ |
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continue; |
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} |
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return -2; |
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} |
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if(l_msg.msg_flags & MSG_TRUNC) |
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{ // buffer was too small
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return -1; |
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} |
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return l_result; |
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} |
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} |
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static struct nlmsghdr *getNetlinkResponse(int p_socket, int *p_size, int *p_done) |
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{ |
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size_t l_size = 4096; |
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void *l_buffer = NULL; |
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for(;;) |
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{ |
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free(l_buffer); |
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l_buffer = malloc(l_size); |
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int l_read = netlink_recv(p_socket, l_buffer, l_size); |
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*p_size = l_read; |
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if(l_read == -2) |
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{ |
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free(l_buffer); |
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return NULL; |
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} |
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if(l_read >= 0) |
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{ |
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pid_t l_pid = getpid(); |
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struct nlmsghdr *l_hdr; |
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for(l_hdr = (struct nlmsghdr *)l_buffer; NLMSG_OK(l_hdr, (unsigned int)l_read); l_hdr = (struct nlmsghdr *)NLMSG_NEXT(l_hdr, l_read)) |
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{ |
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if((pid_t)l_hdr->nlmsg_pid != l_pid || (int)l_hdr->nlmsg_seq != p_socket) |
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{ |
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continue; |
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} |
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if(l_hdr->nlmsg_type == NLMSG_DONE) |
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{ |
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*p_done = 1; |
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break; |
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} |
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if(l_hdr->nlmsg_type == NLMSG_ERROR) |
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{ |
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free(l_buffer); |
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return NULL; |
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} |
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} |
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return l_buffer; |
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} |
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l_size *= 2; |
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} |
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} |
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static NetlinkList *newListItem(struct nlmsghdr *p_data, unsigned int p_size) |
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{ |
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NetlinkList *l_item = malloc(sizeof(NetlinkList)); |
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l_item->m_next = NULL; |
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l_item->m_data = p_data; |
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l_item->m_size = p_size; |
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return l_item; |
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} |
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static void freeResultList(NetlinkList *p_list) |
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{ |
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NetlinkList *l_cur; |
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while(p_list) |
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{ |
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l_cur = p_list; |
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p_list = p_list->m_next; |
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free(l_cur->m_data); |
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free(l_cur); |
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} |
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} |
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static NetlinkList *getResultList(int p_socket, int p_request) |
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{ |
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if(netlink_send(p_socket, p_request) < 0) |
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{ |
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return NULL; |
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} |
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NetlinkList *l_list = NULL; |
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NetlinkList *l_end = NULL; |
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int l_size; |
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int l_done = 0; |
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while(!l_done) |
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{ |
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struct nlmsghdr *l_hdr = getNetlinkResponse(p_socket, &l_size, &l_done); |
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if(!l_hdr) |
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{ // error
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freeResultList(l_list); |
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return NULL; |
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} |
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NetlinkList *l_item = newListItem(l_hdr, l_size); |
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if(!l_list) |
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{ |
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l_list = l_item; |
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} |
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else |
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{ |
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l_end->m_next = l_item; |
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} |
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l_end = l_item; |
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} |
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return l_list; |
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} |
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static size_t maxSize(size_t a, size_t b) |
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{ |
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return (a > b ? a : b); |
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} |
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static size_t calcAddrLen(sa_family_t p_family, int p_dataSize) |
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{ |
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switch(p_family) |
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{ |
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case AF_INET: |
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return sizeof(struct sockaddr_in); |
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case AF_INET6: |
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return sizeof(struct sockaddr_in6); |
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case AF_PACKET: |
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return maxSize(sizeof(struct sockaddr_ll), offsetof(struct sockaddr_ll, sll_addr) + p_dataSize); |
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default: |
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return maxSize(sizeof(struct sockaddr), offsetof(struct sockaddr, sa_data) + p_dataSize); |
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} |
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} |
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static void makeSockaddr(sa_family_t p_family, struct sockaddr *p_dest, void *p_data, size_t p_size) |
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{ |
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switch(p_family) |
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{ |
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case AF_INET: |
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memcpy(&((struct sockaddr_in*)p_dest)->sin_addr, p_data, p_size); |
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break; |
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case AF_INET6: |
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memcpy(&((struct sockaddr_in6*)p_dest)->sin6_addr, p_data, p_size); |
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break; |
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case AF_PACKET: |
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memcpy(((struct sockaddr_ll*)p_dest)->sll_addr, p_data, p_size); |
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((struct sockaddr_ll*)p_dest)->sll_halen = p_size; |
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break; |
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default: |
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memcpy(p_dest->sa_data, p_data, p_size); |
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break; |
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} |
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p_dest->sa_family = p_family; |
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} |
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static void addToEnd(struct ifaddrs **p_resultList, struct ifaddrs *p_entry) |
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{ |
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if(!*p_resultList) |
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{ |
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*p_resultList = p_entry; |
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} |
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else |
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{ |
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struct ifaddrs *l_cur = *p_resultList; |
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while(l_cur->ifa_next) |
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{ |
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l_cur = l_cur->ifa_next; |
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} |
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l_cur->ifa_next = p_entry; |
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} |
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} |
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static void interpretLink(struct nlmsghdr *p_hdr, struct ifaddrs **p_links, struct ifaddrs **p_resultList) |
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{ |
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struct ifinfomsg *l_info = (struct ifinfomsg *)NLMSG_DATA(p_hdr); |
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size_t l_nameSize = 0; |
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size_t l_addrSize = 0; |
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size_t l_dataSize = 0; |
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size_t l_rtaSize = NLMSG_PAYLOAD(p_hdr, sizeof(struct ifinfomsg)); |
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struct rtattr *l_rta; |
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for(l_rta = (struct rtattr *)(((char *)l_info) + NLMSG_ALIGN(sizeof(struct ifinfomsg))); RTA_OK(l_rta, l_rtaSize); l_rta = RTA_NEXT(l_rta, l_rtaSize)) |
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{ |
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void *l_rtaData = RTA_DATA(l_rta); |
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size_t l_rtaDataSize = RTA_PAYLOAD(l_rta); |
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switch(l_rta->rta_type) |
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{ |
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case IFLA_ADDRESS: |
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case IFLA_BROADCAST: |
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l_addrSize += NLMSG_ALIGN(calcAddrLen(AF_PACKET, l_rtaDataSize)); |
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break; |
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case IFLA_IFNAME: |
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l_nameSize += NLMSG_ALIGN(l_rtaSize + 1); |
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break; |
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case IFLA_STATS: |
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l_dataSize += NLMSG_ALIGN(l_rtaSize); |
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break; |
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default: |
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break; |
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} |
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} |
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struct ifaddrs *l_entry = malloc(sizeof(struct ifaddrs) + l_nameSize + l_addrSize + l_dataSize); |
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memset(l_entry, 0, sizeof(struct ifaddrs)); |
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l_entry->ifa_name = ""; |
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char *l_name = ((char *)l_entry) + sizeof(struct ifaddrs); |
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char *l_addr = l_name + l_nameSize; |
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char *l_data = l_addr + l_addrSize; |
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l_entry->ifa_flags = l_info->ifi_flags; |
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l_rtaSize = NLMSG_PAYLOAD(p_hdr, sizeof(struct ifinfomsg)); |
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for(l_rta = (struct rtattr *)(((char *)l_info) + NLMSG_ALIGN(sizeof(struct ifinfomsg))); RTA_OK(l_rta, l_rtaSize); l_rta = RTA_NEXT(l_rta, l_rtaSize)) |
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{ |
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void *l_rtaData = RTA_DATA(l_rta); |
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size_t l_rtaDataSize = RTA_PAYLOAD(l_rta); |
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switch(l_rta->rta_type) |
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{ |
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case IFLA_ADDRESS: |
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case IFLA_BROADCAST: |
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{ |
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size_t l_addrLen = calcAddrLen(AF_PACKET, l_rtaDataSize); |
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makeSockaddr(AF_PACKET, (struct sockaddr *)l_addr, l_rtaData, l_rtaDataSize); |
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((struct sockaddr_ll *)l_addr)->sll_ifindex = l_info->ifi_index; |
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((struct sockaddr_ll *)l_addr)->sll_hatype = l_info->ifi_type; |
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if(l_rta->rta_type == IFLA_ADDRESS) |
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{ |
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l_entry->ifa_addr = (struct sockaddr *)l_addr; |
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} |
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else |
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{ |
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l_entry->ifa_broadaddr = (struct sockaddr *)l_addr; |
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} |
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l_addr += NLMSG_ALIGN(l_addrLen); |
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break; |
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} |
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case IFLA_IFNAME: |
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strncpy(l_name, l_rtaData, l_rtaDataSize); |
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l_name[l_rtaDataSize] = '\0'; |
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l_entry->ifa_name = l_name; |
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break; |
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case IFLA_STATS: |
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memcpy(l_data, l_rtaData, l_rtaDataSize); |
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l_entry->ifa_data = l_data; |
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break; |
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default: |
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break; |
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} |
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} |
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addToEnd(p_resultList, l_entry); |
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p_links[l_info->ifi_index - 1] = l_entry; |
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} |
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static void interpretAddr(struct nlmsghdr *p_hdr, struct ifaddrs **p_links, struct ifaddrs **p_resultList) |
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{ |
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struct ifaddrmsg *l_info = (struct ifaddrmsg *)NLMSG_DATA(p_hdr); |
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size_t l_nameSize = 0; |
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size_t l_addrSize = 0; |
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int l_addedNetmask = 0; |
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size_t l_rtaSize = NLMSG_PAYLOAD(p_hdr, sizeof(struct ifaddrmsg)); |
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struct rtattr *l_rta; |
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for(l_rta = (struct rtattr *)(((char *)l_info) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))); RTA_OK(l_rta, l_rtaSize); l_rta = RTA_NEXT(l_rta, l_rtaSize)) |
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{ |
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void *l_rtaData = RTA_DATA(l_rta); |
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size_t l_rtaDataSize = RTA_PAYLOAD(l_rta); |
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if(l_info->ifa_family == AF_PACKET) |
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{ |
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continue; |
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} |
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switch(l_rta->rta_type) |
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{ |
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case IFA_ADDRESS: |
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case IFA_LOCAL: |
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if((l_info->ifa_family == AF_INET || l_info->ifa_family == AF_INET6) && !l_addedNetmask) |
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{ // make room for netmask
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l_addrSize += NLMSG_ALIGN(calcAddrLen(l_info->ifa_family, l_rtaDataSize)); |
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l_addedNetmask = 1; |
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} |
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case IFA_BROADCAST: |
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l_addrSize += NLMSG_ALIGN(calcAddrLen(l_info->ifa_family, l_rtaDataSize)); |
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break; |
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case IFA_LABEL: |
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l_nameSize += NLMSG_ALIGN(l_rtaSize + 1); |
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break; |
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default: |
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break; |
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} |
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} |
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struct ifaddrs *l_entry = malloc(sizeof(struct ifaddrs) + l_nameSize + l_addrSize); |
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memset(l_entry, 0, sizeof(struct ifaddrs)); |
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l_entry->ifa_name = p_links[l_info->ifa_index - 1]->ifa_name; |
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char *l_name = ((char *)l_entry) + sizeof(struct ifaddrs); |
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char *l_addr = l_name + l_nameSize; |
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l_entry->ifa_flags = l_info->ifa_flags | p_links[l_info->ifa_index - 1]->ifa_flags; |
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l_rtaSize = NLMSG_PAYLOAD(p_hdr, sizeof(struct ifaddrmsg)); |
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for(l_rta = (struct rtattr *)(((char *)l_info) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))); RTA_OK(l_rta, l_rtaSize); l_rta = RTA_NEXT(l_rta, l_rtaSize)) |
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{ |
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void *l_rtaData = RTA_DATA(l_rta); |
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size_t l_rtaDataSize = RTA_PAYLOAD(l_rta); |
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switch(l_rta->rta_type) |
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{ |
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case IFA_ADDRESS: |
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case IFA_BROADCAST: |
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case IFA_LOCAL: |
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{ |
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size_t l_addrLen = calcAddrLen(l_info->ifa_family, l_rtaDataSize); |
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makeSockaddr(l_info->ifa_family, (struct sockaddr *)l_addr, l_rtaData, l_rtaDataSize); |
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if(l_info->ifa_family == AF_INET6) |
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{ |
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if(IN6_IS_ADDR_LINKLOCAL((struct in6_addr *)l_rtaData) || IN6_IS_ADDR_MC_LINKLOCAL((struct in6_addr *)l_rtaData)) |
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{ |
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((struct sockaddr_in6 *)l_addr)->sin6_scope_id = l_info->ifa_index; |
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} |
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} |
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if(l_rta->rta_type == IFA_ADDRESS) |
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{ // apparently in a point-to-point network IFA_ADDRESS contains the dest address and IFA_LOCAL contains the local address
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if(l_entry->ifa_addr) |
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{ |
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l_entry->ifa_dstaddr = (struct sockaddr *)l_addr; |
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} |
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else |
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{ |
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l_entry->ifa_addr = (struct sockaddr *)l_addr; |
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} |
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} |
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else if(l_rta->rta_type == IFA_LOCAL) |
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{ |
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if(l_entry->ifa_addr) |
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{ |
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l_entry->ifa_dstaddr = l_entry->ifa_addr; |
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} |
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l_entry->ifa_addr = (struct sockaddr *)l_addr; |
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} |
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else |
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{ |
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l_entry->ifa_broadaddr = (struct sockaddr *)l_addr; |
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} |
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l_addr += NLMSG_ALIGN(l_addrLen); |
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break; |
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} |
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case IFA_LABEL: |
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strncpy(l_name, l_rtaData, l_rtaDataSize); |
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l_name[l_rtaDataSize] = '\0'; |
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l_entry->ifa_name = l_name; |
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break; |
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default: |
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break; |
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} |
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} |
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if(l_entry->ifa_addr && (l_entry->ifa_addr->sa_family == AF_INET || l_entry->ifa_addr->sa_family == AF_INET6)) |
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{ |
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unsigned l_maxPrefix = (l_entry->ifa_addr->sa_family == AF_INET ? 32 : 128); |
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unsigned l_prefix = (l_info->ifa_prefixlen > l_maxPrefix ? l_maxPrefix : l_info->ifa_prefixlen); |
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char l_mask[16] = {0}; |
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unsigned i; |
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for(i=0; i<(l_prefix/8); ++i) |
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{ |
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l_mask[i] = 0xff; |
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} |
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l_mask[i] = 0xff << (8 - (l_prefix % 8)); |
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makeSockaddr(l_entry->ifa_addr->sa_family, (struct sockaddr *)l_addr, l_mask, l_maxPrefix / 8); |
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l_entry->ifa_netmask = (struct sockaddr *)l_addr; |
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} |
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addToEnd(p_resultList, l_entry); |
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} |
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|
||||
static void interpret(int p_socket, NetlinkList *p_netlinkList, struct ifaddrs **p_links, struct ifaddrs **p_resultList) |
||||
{ |
||||
pid_t l_pid = getpid(); |
||||
for(; p_netlinkList; p_netlinkList = p_netlinkList->m_next) |
||||
{ |
||||
unsigned int l_nlsize = p_netlinkList->m_size; |
||||
struct nlmsghdr *l_hdr; |
||||
for(l_hdr = p_netlinkList->m_data; NLMSG_OK(l_hdr, l_nlsize); l_hdr = NLMSG_NEXT(l_hdr, l_nlsize)) |
||||
{ |
||||
if((pid_t)l_hdr->nlmsg_pid != l_pid || (int)l_hdr->nlmsg_seq != p_socket) |
||||
{ |
||||
continue; |
||||
} |
||||
|
||||
if(l_hdr->nlmsg_type == NLMSG_DONE) |
||||
{ |
||||
break; |
||||
} |
||||
|
||||
if(l_hdr->nlmsg_type == RTM_NEWLINK) |
||||
{ |
||||
interpretLink(l_hdr, p_links, p_resultList); |
||||
} |
||||
else if(l_hdr->nlmsg_type == RTM_NEWADDR) |
||||
{ |
||||
interpretAddr(l_hdr, p_links, p_resultList); |
||||
} |
||||
} |
||||
} |
||||
} |
||||
|
||||
static unsigned countLinks(int p_socket, NetlinkList *p_netlinkList) |
||||
{ |
||||
unsigned l_links = 0; |
||||
pid_t l_pid = getpid(); |
||||
for(; p_netlinkList; p_netlinkList = p_netlinkList->m_next) |
||||
{ |
||||
unsigned int l_nlsize = p_netlinkList->m_size; |
||||
struct nlmsghdr *l_hdr; |
||||
for(l_hdr = p_netlinkList->m_data; NLMSG_OK(l_hdr, l_nlsize); l_hdr = NLMSG_NEXT(l_hdr, l_nlsize)) |
||||
{ |
||||
if((pid_t)l_hdr->nlmsg_pid != l_pid || (int)l_hdr->nlmsg_seq != p_socket) |
||||
{ |
||||
continue; |
||||
} |
||||
|
||||
if(l_hdr->nlmsg_type == NLMSG_DONE) |
||||
{ |
||||
break; |
||||
} |
||||
|
||||
if(l_hdr->nlmsg_type == RTM_NEWLINK) |
||||
{ |
||||
++l_links; |
||||
} |
||||
} |
||||
} |
||||
|
||||
return l_links; |
||||
} |
||||
|
||||
int getifaddrs(struct ifaddrs **ifap) |
||||
{ |
||||
if(!ifap) |
||||
{ |
||||
return -1; |
||||
} |
||||
*ifap = NULL; |
||||
|
||||
int l_socket = netlink_socket(); |
||||
if(l_socket < 0) |
||||
{ |
||||
return -1; |
||||
} |
||||
|
||||
NetlinkList *l_linkResults = getResultList(l_socket, RTM_GETLINK); |
||||
if(!l_linkResults) |
||||
{ |
||||
close(l_socket); |
||||
return -1; |
||||
} |
||||
|
||||
NetlinkList *l_addrResults = getResultList(l_socket, RTM_GETADDR); |
||||
if(!l_addrResults) |
||||
{ |
||||
close(l_socket); |
||||
freeResultList(l_linkResults); |
||||
return -1; |
||||
} |
||||
|
||||
unsigned l_numLinks = countLinks(l_socket, l_linkResults) + countLinks(l_socket, l_addrResults); |
||||
struct ifaddrs *l_links[l_numLinks]; |
||||
memset(l_links, 0, l_numLinks * sizeof(struct ifaddrs *)); |
||||
|
||||
interpret(l_socket, l_linkResults, l_links, ifap); |
||||
interpret(l_socket, l_addrResults, l_links, ifap); |
||||
|
||||
freeResultList(l_linkResults); |
||||
freeResultList(l_addrResults); |
||||
close(l_socket); |
||||
return 0; |
||||
} |
||||
|
||||
void freeifaddrs(struct ifaddrs *ifa) |
||||
{ |
||||
struct ifaddrs *l_cur; |
||||
while(ifa) |
||||
{ |
||||
l_cur = ifa; |
||||
ifa = ifa->ifa_next; |
||||
free(l_cur); |
||||
} |
||||
} |
@ -0,0 +1,54 @@
@@ -0,0 +1,54 @@
|
||||
/*
|
||||
* Copyright (c) 1995, 1999 |
||||
* Berkeley Software Design, Inc. All rights reserved. |
||||
* |
||||
* Redistribution and use in source and binary forms, with or without |
||||
* modification, are permitted provided that the following conditions |
||||
* are met: |
||||
* 1. Redistributions of source code must retain the above copyright |
||||
* notice, this list of conditions and the following disclaimer. |
||||
* |
||||
* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND |
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
||||
* ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE |
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
||||
* SUCH DAMAGE. |
||||
* |
||||
* BSDI ifaddrs.h,v 2.5 2000/02/23 14:51:59 dab Exp |
||||
*/ |
||||
|
||||
#ifndef _IFADDRS_H_ |
||||
#define _IFADDRS_H_ |
||||
|
||||
struct ifaddrs { |
||||
struct ifaddrs *ifa_next; |
||||
char *ifa_name; |
||||
unsigned int ifa_flags; |
||||
struct sockaddr *ifa_addr; |
||||
struct sockaddr *ifa_netmask; |
||||
struct sockaddr *ifa_dstaddr; |
||||
void *ifa_data; |
||||
}; |
||||
|
||||
/*
|
||||
* This may have been defined in <net/if.h>. Note that if <net/if.h> is |
||||
* to be included it must be included before this header file. |
||||
*/ |
||||
#ifndef ifa_broadaddr |
||||
#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ |
||||
#endif |
||||
|
||||
#include <sys/cdefs.h> |
||||
|
||||
__BEGIN_DECLS |
||||
extern int getifaddrs(struct ifaddrs **ifap); |
||||
extern void freeifaddrs(struct ifaddrs *ifa); |
||||
__END_DECLS |
||||
|
||||
#endif |
Loading…
Reference in new issue