diff options
Diffstat (limited to 'Utilities/cmlibuv/src/unix/android-ifaddrs.c')
| -rw-r--r-- | Utilities/cmlibuv/src/unix/android-ifaddrs.c | 713 |
1 files changed, 0 insertions, 713 deletions
diff --git a/Utilities/cmlibuv/src/unix/android-ifaddrs.c b/Utilities/cmlibuv/src/unix/android-ifaddrs.c deleted file mode 100644 index 4765cc0..0000000 --- a/Utilities/cmlibuv/src/unix/android-ifaddrs.c +++ /dev/null @@ -1,713 +0,0 @@ -/* -Copyright (c) 2013, Kenneth MacKay -Copyright (c) 2014, Emergya (Cloud4all, FP7/2007-2013 grant agreement #289016) -All rights reserved. - -Redistribution and use in source and binary forms, with or without modification, -are permitted provided that the following conditions are met: - * Redistributions of source code must retain the above copyright notice, this - list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above copyright notice, - this list of conditions and the following disclaimer in the documentation - and/or other materials provided with the distribution. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER OR CONTRIBUTORS 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. -*/ - -#include "uv/android-ifaddrs.h" -#include "uv-common.h" - -#include <string.h> -#include <stdlib.h> -#include <errno.h> -#include <unistd.h> -#include <sys/socket.h> -#include <net/if_arp.h> -#include <netinet/in.h> -#include <linux/netlink.h> -#include <linux/rtnetlink.h> -#include <linux/if_packet.h> - -typedef struct NetlinkList -{ - struct NetlinkList *m_next; - struct nlmsghdr *m_data; - unsigned int m_size; -} NetlinkList; - -static int netlink_socket(pid_t *p_pid) -{ - struct sockaddr_nl l_addr; - socklen_t l_len; - - int l_socket = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE); - if(l_socket < 0) - { - return -1; - } - - memset(&l_addr, 0, sizeof(l_addr)); - l_addr.nl_family = AF_NETLINK; - if(bind(l_socket, (struct sockaddr *)&l_addr, sizeof(l_addr)) < 0) - { - close(l_socket); - return -1; - } - - l_len = sizeof(l_addr); - if(getsockname(l_socket, (struct sockaddr *)&l_addr, &l_len) < 0) - { - close(l_socket); - return -1; - } - *p_pid = l_addr.nl_pid; - - return l_socket; -} - -static int netlink_send(int p_socket, int p_request) -{ - char l_buffer[NLMSG_ALIGN(sizeof(struct nlmsghdr)) + NLMSG_ALIGN(sizeof(struct rtgenmsg))]; - - struct nlmsghdr *l_hdr; - struct rtgenmsg *l_msg; - struct sockaddr_nl l_addr; - - memset(l_buffer, 0, sizeof(l_buffer)); - - l_hdr = (struct nlmsghdr *)l_buffer; - l_msg = (struct rtgenmsg *)NLMSG_DATA(l_hdr); - - l_hdr->nlmsg_len = NLMSG_LENGTH(sizeof(*l_msg)); - l_hdr->nlmsg_type = p_request; - l_hdr->nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; - l_hdr->nlmsg_pid = 0; - l_hdr->nlmsg_seq = p_socket; - l_msg->rtgen_family = AF_UNSPEC; - - memset(&l_addr, 0, sizeof(l_addr)); - l_addr.nl_family = AF_NETLINK; - return (sendto(p_socket, l_hdr, l_hdr->nlmsg_len, 0, (struct sockaddr *)&l_addr, sizeof(l_addr))); -} - -static int netlink_recv(int p_socket, void *p_buffer, size_t p_len) -{ - struct sockaddr_nl l_addr; - struct msghdr l_msg; - - struct iovec l_iov; - l_iov.iov_base = p_buffer; - l_iov.iov_len = p_len; - - for(;;) - { - int l_result; - l_msg.msg_name = (void *)&l_addr; - l_msg.msg_namelen = sizeof(l_addr); - l_msg.msg_iov = &l_iov; - l_msg.msg_iovlen = 1; - l_msg.msg_control = NULL; - l_msg.msg_controllen = 0; - l_msg.msg_flags = 0; - l_result = recvmsg(p_socket, &l_msg, 0); - - if(l_result < 0) - { - if(errno == EINTR) - { - continue; - } - return -2; - } - - /* Buffer was too small */ - if(l_msg.msg_flags & MSG_TRUNC) - { - return -1; - } - return l_result; - } -} - -static struct nlmsghdr *getNetlinkResponse(int p_socket, pid_t p_pid, int *p_size, int *p_done) -{ - size_t l_size = 4096; - void *l_buffer = NULL; - - for(;;) - { - int l_read; - - uv__free(l_buffer); - l_buffer = uv__malloc(l_size); - if (l_buffer == NULL) - { - return NULL; - } - - l_read = netlink_recv(p_socket, l_buffer, l_size); - *p_size = l_read; - if(l_read == -2) - { - uv__free(l_buffer); - return NULL; - } - if(l_read >= 0) - { - struct nlmsghdr *l_hdr; - 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)) - { - if((pid_t)l_hdr->nlmsg_pid != p_pid || (int)l_hdr->nlmsg_seq != p_socket) - { - continue; - } - - if(l_hdr->nlmsg_type == NLMSG_DONE) - { - *p_done = 1; - break; - } - - if(l_hdr->nlmsg_type == NLMSG_ERROR) - { - uv__free(l_buffer); - return NULL; - } - } - return l_buffer; - } - - l_size *= 2; - } -} - -static NetlinkList *newListItem(struct nlmsghdr *p_data, unsigned int p_size) -{ - NetlinkList *l_item = uv__malloc(sizeof(NetlinkList)); - if (l_item == NULL) - { - return NULL; - } - - l_item->m_next = NULL; - l_item->m_data = p_data; - l_item->m_size = p_size; - return l_item; -} - -static void freeResultList(NetlinkList *p_list) -{ - NetlinkList *l_cur; - while(p_list) - { - l_cur = p_list; - p_list = p_list->m_next; - uv__free(l_cur->m_data); - uv__free(l_cur); - } -} - -static NetlinkList *getResultList(int p_socket, int p_request, pid_t p_pid) -{ - int l_size; - int l_done; - NetlinkList *l_list; - NetlinkList *l_end; - - if(netlink_send(p_socket, p_request) < 0) - { - return NULL; - } - - l_list = NULL; - l_end = NULL; - - l_done = 0; - while(!l_done) - { - NetlinkList *l_item; - - struct nlmsghdr *l_hdr = getNetlinkResponse(p_socket, p_pid, &l_size, &l_done); - /* Error */ - if(!l_hdr) - { - freeResultList(l_list); - return NULL; - } - - l_item = newListItem(l_hdr, l_size); - if (!l_item) - { - freeResultList(l_list); - return NULL; - } - if(!l_list) - { - l_list = l_item; - } - else - { - l_end->m_next = l_item; - } - l_end = l_item; - } - return l_list; -} - -static size_t maxSize(size_t a, size_t b) -{ - return (a > b ? a : b); -} - -static size_t calcAddrLen(sa_family_t p_family, int p_dataSize) -{ - switch(p_family) - { - case AF_INET: - return sizeof(struct sockaddr_in); - case AF_INET6: - return sizeof(struct sockaddr_in6); - case AF_PACKET: - return maxSize(sizeof(struct sockaddr_ll), offsetof(struct sockaddr_ll, sll_addr) + p_dataSize); - default: - return maxSize(sizeof(struct sockaddr), offsetof(struct sockaddr, sa_data) + p_dataSize); - } -} - -static void makeSockaddr(sa_family_t p_family, struct sockaddr *p_dest, void *p_data, size_t p_size) -{ - switch(p_family) - { - case AF_INET: - memcpy(&((struct sockaddr_in*)p_dest)->sin_addr, p_data, p_size); - break; - case AF_INET6: - memcpy(&((struct sockaddr_in6*)p_dest)->sin6_addr, p_data, p_size); - break; - case AF_PACKET: - memcpy(((struct sockaddr_ll*)p_dest)->sll_addr, p_data, p_size); - ((struct sockaddr_ll*)p_dest)->sll_halen = p_size; - break; - default: - memcpy(p_dest->sa_data, p_data, p_size); - break; - } - p_dest->sa_family = p_family; -} - -static void addToEnd(struct ifaddrs **p_resultList, struct ifaddrs *p_entry) -{ - if(!*p_resultList) - { - *p_resultList = p_entry; - } - else - { - struct ifaddrs *l_cur = *p_resultList; - while(l_cur->ifa_next) - { - l_cur = l_cur->ifa_next; - } - l_cur->ifa_next = p_entry; - } -} - -static int interpretLink(struct nlmsghdr *p_hdr, struct ifaddrs **p_resultList) -{ - struct ifaddrs *l_entry; - - char *l_index; - char *l_name; - char *l_addr; - char *l_data; - - struct ifinfomsg *l_info = (struct ifinfomsg *)NLMSG_DATA(p_hdr); - - size_t l_nameSize = 0; - size_t l_addrSize = 0; - size_t l_dataSize = 0; - - size_t l_rtaSize = NLMSG_PAYLOAD(p_hdr, sizeof(struct ifinfomsg)); - struct rtattr *l_rta; - for(l_rta = IFLA_RTA(l_info); RTA_OK(l_rta, l_rtaSize); l_rta = RTA_NEXT(l_rta, l_rtaSize)) - { - size_t l_rtaDataSize = RTA_PAYLOAD(l_rta); - switch(l_rta->rta_type) - { - case IFLA_ADDRESS: - case IFLA_BROADCAST: - l_addrSize += NLMSG_ALIGN(calcAddrLen(AF_PACKET, l_rtaDataSize)); - break; - case IFLA_IFNAME: - l_nameSize += NLMSG_ALIGN(l_rtaSize + 1); - break; - case IFLA_STATS: - l_dataSize += NLMSG_ALIGN(l_rtaSize); - break; - default: - break; - } - } - - l_entry = uv__malloc(sizeof(struct ifaddrs) + sizeof(int) + l_nameSize + l_addrSize + l_dataSize); - if (l_entry == NULL) - { - return -1; - } - memset(l_entry, 0, sizeof(struct ifaddrs)); - l_entry->ifa_name = ""; - - l_index = ((char *)l_entry) + sizeof(struct ifaddrs); - l_name = l_index + sizeof(int); - l_addr = l_name + l_nameSize; - l_data = l_addr + l_addrSize; - - /* Save the interface index so we can look it up when handling the - * addresses. - */ - memcpy(l_index, &l_info->ifi_index, sizeof(int)); - - l_entry->ifa_flags = l_info->ifi_flags; - - l_rtaSize = NLMSG_PAYLOAD(p_hdr, sizeof(struct ifinfomsg)); - for(l_rta = IFLA_RTA(l_info); RTA_OK(l_rta, l_rtaSize); l_rta = RTA_NEXT(l_rta, l_rtaSize)) - { - void *l_rtaData = RTA_DATA(l_rta); - size_t l_rtaDataSize = RTA_PAYLOAD(l_rta); - switch(l_rta->rta_type) - { - case IFLA_ADDRESS: - case IFLA_BROADCAST: - { - size_t l_addrLen = calcAddrLen(AF_PACKET, l_rtaDataSize); - makeSockaddr(AF_PACKET, (struct sockaddr *)l_addr, l_rtaData, l_rtaDataSize); - ((struct sockaddr_ll *)l_addr)->sll_ifindex = l_info->ifi_index; - ((struct sockaddr_ll *)l_addr)->sll_hatype = l_info->ifi_type; - if(l_rta->rta_type == IFLA_ADDRESS) - { - l_entry->ifa_addr = (struct sockaddr *)l_addr; - } - else - { - l_entry->ifa_broadaddr = (struct sockaddr *)l_addr; - } - l_addr += NLMSG_ALIGN(l_addrLen); - break; - } - case IFLA_IFNAME: - strncpy(l_name, l_rtaData, l_rtaDataSize); - l_name[l_rtaDataSize] = '\0'; - l_entry->ifa_name = l_name; - break; - case IFLA_STATS: - memcpy(l_data, l_rtaData, l_rtaDataSize); - l_entry->ifa_data = l_data; - break; - default: - break; - } - } - - addToEnd(p_resultList, l_entry); - return 0; -} - -static struct ifaddrs *findInterface(int p_index, struct ifaddrs **p_links, int p_numLinks) -{ - int l_num = 0; - struct ifaddrs *l_cur = *p_links; - while(l_cur && l_num < p_numLinks) - { - char *l_indexPtr = ((char *)l_cur) + sizeof(struct ifaddrs); - int l_index; - memcpy(&l_index, l_indexPtr, sizeof(int)); - if(l_index == p_index) - { - return l_cur; - } - - l_cur = l_cur->ifa_next; - ++l_num; - } - return NULL; -} - -static int interpretAddr(struct nlmsghdr *p_hdr, struct ifaddrs **p_resultList, int p_numLinks) -{ - struct ifaddrmsg *l_info = (struct ifaddrmsg *)NLMSG_DATA(p_hdr); - struct ifaddrs *l_interface = findInterface(l_info->ifa_index, p_resultList, p_numLinks); - - size_t l_nameSize = 0; - size_t l_addrSize = 0; - - int l_addedNetmask = 0; - - size_t l_rtaSize = NLMSG_PAYLOAD(p_hdr, sizeof(struct ifaddrmsg)); - struct rtattr *l_rta; - struct ifaddrs *l_entry; - - char *l_name; - char *l_addr; - - for(l_rta = IFA_RTA(l_info); RTA_OK(l_rta, l_rtaSize); l_rta = RTA_NEXT(l_rta, l_rtaSize)) - { - size_t l_rtaDataSize = RTA_PAYLOAD(l_rta); - if(l_info->ifa_family == AF_PACKET) - { - continue; - } - - switch(l_rta->rta_type) - { - case IFA_ADDRESS: - case IFA_LOCAL: - l_addrSize += NLMSG_ALIGN(calcAddrLen(l_info->ifa_family, l_rtaDataSize)); - if((l_info->ifa_family == AF_INET || l_info->ifa_family == AF_INET6) && !l_addedNetmask) - { - /* Make room for netmask */ - l_addrSize += NLMSG_ALIGN(calcAddrLen(l_info->ifa_family, l_rtaDataSize)); - l_addedNetmask = 1; - } - break; - case IFA_BROADCAST: - l_addrSize += NLMSG_ALIGN(calcAddrLen(l_info->ifa_family, l_rtaDataSize)); - break; - case IFA_LABEL: - l_nameSize += NLMSG_ALIGN(l_rtaDataSize + 1); - break; - default: - break; - } - } - - l_entry = uv__malloc(sizeof(struct ifaddrs) + l_nameSize + l_addrSize); - if (l_entry == NULL) - { - return -1; - } - memset(l_entry, 0, sizeof(struct ifaddrs)); - l_entry->ifa_name = (l_interface ? l_interface->ifa_name : ""); - - l_name = ((char *)l_entry) + sizeof(struct ifaddrs); - l_addr = l_name + l_nameSize; - - l_entry->ifa_flags = l_info->ifa_flags; - if(l_interface) - { - l_entry->ifa_flags |= l_interface->ifa_flags; - } - - l_rtaSize = NLMSG_PAYLOAD(p_hdr, sizeof(struct ifaddrmsg)); - for(l_rta = IFA_RTA(l_info); RTA_OK(l_rta, l_rtaSize); l_rta = RTA_NEXT(l_rta, l_rtaSize)) - { - void *l_rtaData = RTA_DATA(l_rta); - size_t l_rtaDataSize = RTA_PAYLOAD(l_rta); - switch(l_rta->rta_type) - { - case IFA_ADDRESS: - case IFA_BROADCAST: - case IFA_LOCAL: - { - size_t l_addrLen = calcAddrLen(l_info->ifa_family, l_rtaDataSize); - makeSockaddr(l_info->ifa_family, (struct sockaddr *)l_addr, l_rtaData, l_rtaDataSize); - if(l_info->ifa_family == AF_INET6) - { - if(IN6_IS_ADDR_LINKLOCAL((struct in6_addr *)l_rtaData) || IN6_IS_ADDR_MC_LINKLOCAL((struct in6_addr *)l_rtaData)) - { - ((struct sockaddr_in6 *)l_addr)->sin6_scope_id = l_info->ifa_index; - } - } - - /* Apparently in a point-to-point network IFA_ADDRESS contains - * the dest address and IFA_LOCAL contains the local address - */ - if(l_rta->rta_type == IFA_ADDRESS) - { - if(l_entry->ifa_addr) - { - l_entry->ifa_dstaddr = (struct sockaddr *)l_addr; - } - else - { - l_entry->ifa_addr = (struct sockaddr *)l_addr; - } - } - else if(l_rta->rta_type == IFA_LOCAL) - { - if(l_entry->ifa_addr) - { - l_entry->ifa_dstaddr = l_entry->ifa_addr; - } - l_entry->ifa_addr = (struct sockaddr *)l_addr; - } - else - { - l_entry->ifa_broadaddr = (struct sockaddr *)l_addr; - } - l_addr += NLMSG_ALIGN(l_addrLen); - break; - } - case IFA_LABEL: - strncpy(l_name, l_rtaData, l_rtaDataSize); - l_name[l_rtaDataSize] = '\0'; - l_entry->ifa_name = l_name; - break; - default: - break; - } - } - - if(l_entry->ifa_addr && (l_entry->ifa_addr->sa_family == AF_INET || l_entry->ifa_addr->sa_family == AF_INET6)) - { - unsigned l_maxPrefix = (l_entry->ifa_addr->sa_family == AF_INET ? 32 : 128); - unsigned l_prefix = (l_info->ifa_prefixlen > l_maxPrefix ? l_maxPrefix : l_info->ifa_prefixlen); - unsigned char l_mask[16] = {0}; - unsigned i; - for(i=0; i<(l_prefix/8); ++i) - { - l_mask[i] = 0xff; - } - if(l_prefix % 8) - { - l_mask[i] = 0xff << (8 - (l_prefix % 8)); - } - - makeSockaddr(l_entry->ifa_addr->sa_family, (struct sockaddr *)l_addr, l_mask, l_maxPrefix / 8); - l_entry->ifa_netmask = (struct sockaddr *)l_addr; - } - - addToEnd(p_resultList, l_entry); - return 0; -} - -static int interpretLinks(int p_socket, pid_t p_pid, NetlinkList *p_netlinkList, struct ifaddrs **p_resultList) -{ - - int l_numLinks = 0; - 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 != p_pid || (int)l_hdr->nlmsg_seq != p_socket) - { - continue; - } - - if(l_hdr->nlmsg_type == NLMSG_DONE) - { - break; - } - - if(l_hdr->nlmsg_type == RTM_NEWLINK) - { - if(interpretLink(l_hdr, p_resultList) == -1) - { - return -1; - } - ++l_numLinks; - } - } - } - return l_numLinks; -} - -static int interpretAddrs(int p_socket, pid_t p_pid, NetlinkList *p_netlinkList, struct ifaddrs **p_resultList, int p_numLinks) -{ - 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 != p_pid || (int)l_hdr->nlmsg_seq != p_socket) - { - continue; - } - - if(l_hdr->nlmsg_type == NLMSG_DONE) - { - break; - } - - if(l_hdr->nlmsg_type == RTM_NEWADDR) - { - if (interpretAddr(l_hdr, p_resultList, p_numLinks) == -1) - { - return -1; - } - } - } - } - return 0; -} - -int getifaddrs(struct ifaddrs **ifap) -{ - int l_socket; - int l_result; - int l_numLinks; - pid_t l_pid; - NetlinkList *l_linkResults; - NetlinkList *l_addrResults; - - if(!ifap) - { - return -1; - } - *ifap = NULL; - - l_socket = netlink_socket(&l_pid); - if(l_socket < 0) - { - return -1; - } - - l_linkResults = getResultList(l_socket, RTM_GETLINK, l_pid); - if(!l_linkResults) - { - close(l_socket); - return -1; - } - - l_addrResults = getResultList(l_socket, RTM_GETADDR, l_pid); - if(!l_addrResults) - { - close(l_socket); - freeResultList(l_linkResults); - return -1; - } - - l_result = 0; - l_numLinks = interpretLinks(l_socket, l_pid, l_linkResults, ifap); - if(l_numLinks == -1 || interpretAddrs(l_socket, l_pid, l_addrResults, ifap, l_numLinks) == -1) - { - l_result = -1; - } - - freeResultList(l_linkResults); - freeResultList(l_addrResults); - close(l_socket); - return l_result; -} - -void freeifaddrs(struct ifaddrs *ifa) -{ - struct ifaddrs *l_cur; - while(ifa) - { - l_cur = ifa; - ifa = ifa->ifa_next; - uv__free(l_cur); - } -} |