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-rw-r--r--trunk/avahi-core/socket.c930
1 files changed, 0 insertions, 930 deletions
diff --git a/trunk/avahi-core/socket.c b/trunk/avahi-core/socket.c
deleted file mode 100644
index 9291f08..0000000
--- a/trunk/avahi-core/socket.c
+++ /dev/null
@@ -1,930 +0,0 @@
-/* $Id$ */
-
-/***
- This file is part of avahi.
-
- avahi is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as
- published by the Free Software Foundation; either version 2.1 of the
- License, or (at your option) any later version.
-
- avahi is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
- Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with avahi; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- USA.
-***/
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <inttypes.h>
-#include <errno.h>
-#include <string.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/time.h>
-#include <sys/ioctl.h>
-#ifdef HAVE_SYS_FILIO_H
-#include <sys/filio.h>
-#endif
-#include <assert.h>
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <net/if.h>
-#include <sys/uio.h>
-
-#ifdef IP_RECVIF
-#include <net/if_dl.h>
-#endif
-
-#include "dns.h"
-#include "fdutil.h"
-#include "socket.h"
-#include "log.h"
-#include "addr-util.h"
-
-/* this is a portability hack */
-#ifndef IPV6_ADD_MEMBERSHIP
-#ifdef IPV6_JOIN_GROUP
-#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
-#endif
-#endif
-
-#ifndef IPV6_DROP_MEMBERSHIP
-#ifdef IPV6_LEAVE_GROUP
-#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
-#endif
-#endif
-
-static void mdns_mcast_group_ipv4(struct sockaddr_in *ret_sa) {
- assert(ret_sa);
-
- memset(ret_sa, 0, sizeof(struct sockaddr_in));
- ret_sa->sin_family = AF_INET;
- ret_sa->sin_port = htons(AVAHI_MDNS_PORT);
- inet_pton(AF_INET, AVAHI_IPV4_MCAST_GROUP, &ret_sa->sin_addr);
-}
-
-static void mdns_mcast_group_ipv6(struct sockaddr_in6 *ret_sa) {
- assert(ret_sa);
-
- memset(ret_sa, 0, sizeof(struct sockaddr_in6));
- ret_sa->sin6_family = AF_INET6;
- ret_sa->sin6_port = htons(AVAHI_MDNS_PORT);
- inet_pton(AF_INET6, AVAHI_IPV6_MCAST_GROUP, &ret_sa->sin6_addr);
-}
-
-static void ipv4_address_to_sockaddr(struct sockaddr_in *ret_sa, const AvahiIPv4Address *a, uint16_t port) {
- assert(ret_sa);
- assert(a);
- assert(port > 0);
-
- memset(ret_sa, 0, sizeof(struct sockaddr_in));
- ret_sa->sin_family = AF_INET;
- ret_sa->sin_port = htons(port);
- memcpy(&ret_sa->sin_addr, a, sizeof(AvahiIPv4Address));
-}
-
-static void ipv6_address_to_sockaddr(struct sockaddr_in6 *ret_sa, const AvahiIPv6Address *a, uint16_t port) {
- assert(ret_sa);
- assert(a);
- assert(port > 0);
-
- memset(ret_sa, 0, sizeof(struct sockaddr_in6));
- ret_sa->sin6_family = AF_INET6;
- ret_sa->sin6_port = htons(port);
- memcpy(&ret_sa->sin6_addr, a, sizeof(AvahiIPv6Address));
-}
-
-int avahi_mdns_mcast_join_ipv4(int fd, const AvahiIPv4Address *a, int idx, int join) {
-#ifdef HAVE_STRUCT_IP_MREQN
- struct ip_mreqn mreq;
-#else
- struct ip_mreq mreq;
-#endif
- struct sockaddr_in sa;
-
- assert(fd >= 0);
- assert(idx >= 0);
- assert(a);
-
- memset(&mreq, 0, sizeof(mreq));
-#ifdef HAVE_STRUCT_IP_MREQN
- mreq.imr_ifindex = idx;
- mreq.imr_address.s_addr = a->address;
-#else
- mreq.imr_interface.s_addr = a->address;
-#endif
- mdns_mcast_group_ipv4(&sa);
- mreq.imr_multiaddr = sa.sin_addr;
-
- /* Some network drivers have issues with dropping membership of
- * mcast groups when the iface is down, but don't allow rejoining
- * when it comes back up. This is an ugly workaround */
- if (join)
- setsockopt(fd, IPPROTO_IP, IP_DROP_MEMBERSHIP, &mreq, sizeof(mreq));
-
- if (setsockopt(fd, IPPROTO_IP, join ? IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) {
- avahi_log_warn("%s failed: %s", join ? "IP_ADD_MEMBERSHIP" : "IP_DROP_MEMBERSHIP", strerror(errno));
- return -1;
- }
-
- return 0;
-}
-
-int avahi_mdns_mcast_join_ipv6(int fd, const AvahiIPv6Address *a, int idx, int join) {
- struct ipv6_mreq mreq6;
- struct sockaddr_in6 sa6;
-
- assert(fd >= 0);
- assert(idx >= 0);
- assert(a);
-
- memset(&mreq6, 0, sizeof(mreq6));
- mdns_mcast_group_ipv6 (&sa6);
- mreq6.ipv6mr_multiaddr = sa6.sin6_addr;
- mreq6.ipv6mr_interface = idx;
-
- if (join)
- setsockopt(fd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6));
-
- if (setsockopt(fd, IPPROTO_IPV6, join ? IPV6_ADD_MEMBERSHIP : IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
- avahi_log_warn("%s failed: %s", join ? "IPV6_ADD_MEMBERSHIP" : "IPV6_DROP_MEMBERSHIP", strerror(errno));
- return -1;
- }
-
- return 0;
-}
-
-static int reuseaddr(int fd) {
- int yes;
-
- yes = 1;
- if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("SO_REUSEADDR failed: %s", strerror(errno));
- return -1;
- }
-
-#ifdef SO_REUSEPORT
- yes = 1;
- if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("SO_REUSEPORT failed: %s", strerror(errno));
- return -1;
- }
-#endif
-
- return 0;
-}
-
-static int bind_with_warn(int fd, const struct sockaddr *sa, socklen_t l) {
-
- assert(fd >= 0);
- assert(sa);
- assert(l > 0);
-
- if (bind(fd, sa, l) < 0) {
-
- if (errno != EADDRINUSE) {
- avahi_log_warn("bind() failed: %s", strerror(errno));
- return -1;
- }
-
- avahi_log_warn("*** WARNING: Detected another %s mDNS stack running on this host. This makes mDNS unreliable and is thus not recommended. ***",
- sa->sa_family == AF_INET ? "IPv4" : "IPv6");
-
- /* Try again, this time with SO_REUSEADDR set */
- if (reuseaddr(fd) < 0)
- return -1;
-
- if (bind(fd, sa, l) < 0) {
- avahi_log_warn("bind() failed: %s", strerror(errno));
- return -1;
- }
- } else {
-
- /* We enable SO_REUSEADDR afterwards, to make sure that the
- * user may run other mDNS implementations if he really
- * wants. */
-
- if (reuseaddr(fd) < 0)
- return -1;
- }
-
- return 0;
-}
-
-static int ipv4_pktinfo(int fd) {
- int yes;
-
-#ifdef IP_PKTINFO
- yes = 1;
- if (setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IP_PKTINFO failed: %s", strerror(errno));
- return -1;
- }
-#else
-
-#ifdef IP_RECVINTERFACE
- yes = 1;
- if (setsockopt (fd, IPPROTO_IP, IP_RECVINTERFACE, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IP_RECVINTERFACE failed: %s", strerror(errno));
- return -1;
- }
-#elif defined(IP_RECVIF)
- yes = 1;
- if (setsockopt (fd, IPPROTO_IP, IP_RECVIF, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IP_RECVIF failed: %s", strerror(errno));
- return -1;
- }
-#endif
-
-#ifdef IP_RECVDSTADDR
- yes = 1;
- if (setsockopt (fd, IPPROTO_IP, IP_RECVDSTADDR, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IP_RECVDSTADDR failed: %s", strerror(errno));
- return -1;
- }
-#endif
-
-#endif /* IP_PKTINFO */
-
-#ifdef IP_RECVTTL
- yes = 1;
- if (setsockopt(fd, IPPROTO_IP, IP_RECVTTL, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IP_RECVTTL failed: %s", strerror(errno));
- return -1;
- }
-#endif
-
- return 0;
-}
-
-static int ipv6_pktinfo(int fd) {
- int yes;
-
-#ifdef IPV6_RECVPKTINFO
- yes = 1;
- if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IPV6_RECVPKTINFO failed: %s", strerror(errno));
- return -1;
- }
-#elif defined(IPV6_PKTINFO)
- yes = 1;
- if (setsockopt(fd, IPPROTO_IPV6, IPV6_PKTINFO, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IPV6_PKTINFO failed: %s", strerror(errno));
- return -1;
- }
-#endif
-
-#ifdef IPV6_RECVHOPS
- yes = 1;
- if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVHOPS, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IPV6_RECVHOPS failed: %s", strerror(errno));
- return -1;
- }
-#elif defined(IPV6_RECVHOPLIMIT)
- yes = 1;
- if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IPV6_RECVHOPLIMIT failed: %s", strerror(errno));
- return -1;
- }
-#elif defined(IPV6_HOPLIMIT)
- yes = 1;
- if (setsockopt(fd, IPPROTO_IPV6, IPV6_HOPLIMIT, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IPV6_HOPLIMIT failed: %s", strerror(errno));
- return -1;
- }
-#endif
-
- return 0;
-}
-
-int avahi_open_socket_ipv4(int no_reuse) {
- struct sockaddr_in local;
- int fd = -1, r, ittl;
- uint8_t ttl, cyes;
-
- if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
- avahi_log_warn("socket() failed: %s", strerror(errno));
- goto fail;
- }
-
- ttl = 255;
- if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)) < 0) {
- avahi_log_warn("IP_MULTICAST_TTL failed: %s", strerror(errno));
- goto fail;
- }
-
- ittl = 255;
- if (setsockopt(fd, IPPROTO_IP, IP_TTL, &ittl, sizeof(ittl)) < 0) {
- avahi_log_warn("IP_TTL failed: %s", strerror(errno));
- goto fail;
- }
-
- cyes = 1;
- if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &cyes, sizeof(cyes)) < 0) {
- avahi_log_warn("IP_MULTICAST_LOOP failed: %s", strerror(errno));
- goto fail;
- }
-
- memset(&local, 0, sizeof(local));
- local.sin_family = AF_INET;
- local.sin_port = htons(AVAHI_MDNS_PORT);
-
- if (no_reuse)
- r = bind(fd, (struct sockaddr*) &local, sizeof(local));
- else
- r = bind_with_warn(fd, (struct sockaddr*) &local, sizeof(local));
-
- if (r < 0)
- goto fail;
-
- if (ipv4_pktinfo (fd) < 0)
- goto fail;
-
- if (avahi_set_cloexec(fd) < 0) {
- avahi_log_warn("FD_CLOEXEC failed: %s", strerror(errno));
- goto fail;
- }
-
- if (avahi_set_nonblock(fd) < 0) {
- avahi_log_warn("O_NONBLOCK failed: %s", strerror(errno));
- goto fail;
- }
-
- return fd;
-
-fail:
- if (fd >= 0)
- close(fd);
-
- return -1;
-}
-
-int avahi_open_socket_ipv6(int no_reuse) {
- struct sockaddr_in6 sa, local;
- int fd = -1, yes, r;
- int ttl;
-
- mdns_mcast_group_ipv6(&sa);
-
- if ((fd = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
- avahi_log_warn("socket() failed: %s", strerror(errno));
- goto fail;
- }
-
- ttl = 255;
- if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof(ttl)) < 0) {
- avahi_log_warn("IPV6_MULTICAST_HOPS failed: %s", strerror(errno));
- goto fail;
- }
-
- ttl = 255;
- if (setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof(ttl)) < 0) {
- avahi_log_warn("IPV6_UNICAST_HOPS failed: %s", strerror(errno));
- goto fail;
- }
-
- yes = 1;
- if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IPV6_V6ONLY failed: %s", strerror(errno));
- goto fail;
- }
-
- yes = 1;
- if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IPV6_MULTICAST_LOOP failed: %s", strerror(errno));
- goto fail;
- }
-
- memset(&local, 0, sizeof(local));
- local.sin6_family = AF_INET6;
- local.sin6_port = htons(AVAHI_MDNS_PORT);
-
- if (no_reuse)
- r = bind(fd, (struct sockaddr*) &local, sizeof(local));
- else
- r = bind_with_warn(fd, (struct sockaddr*) &local, sizeof(local));
-
- if (r < 0)
- goto fail;
-
- if (ipv6_pktinfo(fd) < 0)
- goto fail;
-
- if (avahi_set_cloexec(fd) < 0) {
- avahi_log_warn("FD_CLOEXEC failed: %s", strerror(errno));
- goto fail;
- }
-
- if (avahi_set_nonblock(fd) < 0) {
- avahi_log_warn("O_NONBLOCK failed: %s", strerror(errno));
- goto fail;
- }
-
- return fd;
-
-fail:
- if (fd >= 0)
- close(fd);
-
- return -1;
-}
-
-static int sendmsg_loop(int fd, struct msghdr *msg, int flags) {
- assert(fd >= 0);
- assert(msg);
-
- for (;;) {
-
- if (sendmsg(fd, msg, flags) >= 0)
- break;
-
- if (errno != EAGAIN) {
- avahi_log_debug("sendmsg() failed: %s", strerror(errno));
- return -1;
- }
-
- if (avahi_wait_for_write(fd) < 0)
- return -1;
- }
-
- return 0;
-}
-
-int avahi_send_dns_packet_ipv4(
- int fd,
- AvahiIfIndex interface,
- AvahiDnsPacket *p,
- const AvahiIPv4Address *src_address,
- const AvahiIPv4Address *dst_address,
- uint16_t dst_port) {
-
- struct sockaddr_in sa;
- struct msghdr msg;
- struct iovec io;
-#ifdef IP_PKTINFO
- struct cmsghdr *cmsg;
- uint8_t cmsg_data[CMSG_SPACE(sizeof(struct in_pktinfo))];
-#elif defined(IP_SENDSRCADDR)
- struct cmsghdr *cmsg;
- uint8_t cmsg_data[CMSG_SPACE(sizeof(struct in_addr))];
-#endif
-
- assert(fd >= 0);
- assert(p);
- assert(avahi_dns_packet_check_valid(p) >= 0);
- assert(!dst_address || dst_port > 0);
-
- if (!dst_address)
- mdns_mcast_group_ipv4(&sa);
- else
- ipv4_address_to_sockaddr(&sa, dst_address, dst_port);
-
- memset(&io, 0, sizeof(io));
- io.iov_base = AVAHI_DNS_PACKET_DATA(p);
- io.iov_len = p->size;
-
- memset(&msg, 0, sizeof(msg));
- msg.msg_name = &sa;
- msg.msg_namelen = sizeof(sa);
- msg.msg_iov = &io;
- msg.msg_iovlen = 1;
- msg.msg_flags = 0;
- msg.msg_control = NULL;
- msg.msg_controllen = 0;
-
-#ifdef IP_PKTINFO
- if (interface > 0 || src_address) {
- struct in_pktinfo *pkti;
-
- memset(cmsg_data, 0, sizeof(cmsg_data));
- msg.msg_control = cmsg_data;
- msg.msg_controllen = sizeof(cmsg_data);
-
- cmsg = CMSG_FIRSTHDR(&msg);
- cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
- cmsg->cmsg_level = IPPROTO_IP;
- cmsg->cmsg_type = IP_PKTINFO;
-
- pkti = (struct in_pktinfo*) CMSG_DATA(cmsg);
-
- if (interface > 0)
- pkti->ipi_ifindex = interface;
-
- if (src_address)
- pkti->ipi_spec_dst.s_addr = src_address->address;
-
- msg.msg_controllen = cmsg->cmsg_len;
- }
-#elif defined(IP_SENDSRCADDR)
- if (src_address) {
- struct in_addr *addr;
-
- memset(cmsg_data, 0, sizeof(cmsg_data));
- msg.msg_control = cmsg_data;
- msg.msg_controllen = sizeof(cmsg_data);
-
- cmsg = CMSG_FIRSTHDR(&msg);
- cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_addr));
- cmsg->cmsg_level = IPPROTO_IP;
- cmsg->cmsg_type = IP_SENDSRCADDR;
-
- addr = (struct in_addr *)CMSG_DATA(cmsg);
- addr->s_addr = src_address->address;
-
- msg.msg_controllen = cmsg->cmsg_len;
-}
-#elif defined(IP_MULTICAST_IF)
- {
- struct in_addr any = { INADDR_ANY };
- if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, src_address ? (const void*) &src_address->address : (const void*) &any, sizeof(struct in_addr)) < 0) {
- avahi_log_warn("IP_MULTICAST_IF failed: %s", strerror(errno));
- return -1;
- }
- }
-#elif defined(__GNUC__)
-#warning "FIXME: We need some code to set the outgoing interface/local address here if IP_PKTINFO/IP_MULTICAST_IF is not available"
-#endif
-
- return sendmsg_loop(fd, &msg, 0);
-}
-
-int avahi_send_dns_packet_ipv6(int fd, AvahiIfIndex interface, AvahiDnsPacket *p, const AvahiIPv6Address *src_address, const AvahiIPv6Address *dst_address, uint16_t dst_port) {
- struct sockaddr_in6 sa;
- struct msghdr msg;
- struct iovec io;
- struct cmsghdr *cmsg;
- uint8_t cmsg_data[CMSG_SPACE(sizeof(struct in6_pktinfo))];
-
- assert(fd >= 0);
- assert(p);
- assert(avahi_dns_packet_check_valid(p) >= 0);
- assert(!dst_address || dst_port > 0);
-
- if (!dst_address)
- mdns_mcast_group_ipv6(&sa);
- else
- ipv6_address_to_sockaddr(&sa, dst_address, dst_port);
-
- memset(&io, 0, sizeof(io));
- io.iov_base = AVAHI_DNS_PACKET_DATA(p);
- io.iov_len = p->size;
-
- memset(&msg, 0, sizeof(msg));
- msg.msg_name = &sa;
- msg.msg_namelen = sizeof(sa);
- msg.msg_iov = &io;
- msg.msg_iovlen = 1;
- msg.msg_flags = 0;
-
- if (interface > 0 || src_address) {
- struct in6_pktinfo *pkti;
-
- memset(cmsg_data, 0, sizeof(cmsg_data));
- msg.msg_control = cmsg_data;
- msg.msg_controllen = sizeof(cmsg_data);
-
- cmsg = CMSG_FIRSTHDR(&msg);
- cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
- cmsg->cmsg_level = IPPROTO_IPV6;
- cmsg->cmsg_type = IPV6_PKTINFO;
-
- pkti = (struct in6_pktinfo*) CMSG_DATA(cmsg);
-
- if (interface > 0)
- pkti->ipi6_ifindex = interface;
-
- if (src_address)
- memcpy(&pkti->ipi6_addr, src_address->address, sizeof(src_address->address));
-
- msg.msg_controllen = cmsg->cmsg_len;
- } else {
- msg.msg_control = NULL;
- msg.msg_controllen = 0;
- }
-
- return sendmsg_loop(fd, &msg, 0);
-}
-
-AvahiDnsPacket *avahi_recv_dns_packet_ipv4(int fd, AvahiIPv4Address *ret_src_address, uint16_t *ret_src_port, AvahiIPv4Address *ret_dst_address, AvahiIfIndex *ret_iface, uint8_t *ret_ttl) {
- AvahiDnsPacket *p= NULL;
- struct msghdr msg;
- struct iovec io;
- size_t aux[1024 / sizeof(size_t)]; /* for alignment on ia64 ! */
- ssize_t l;
- struct cmsghdr *cmsg;
- int found_addr = 0;
- int ms;
- struct sockaddr_in sa;
-
- assert(fd >= 0);
-
- if (ioctl(fd, FIONREAD, &ms) < 0) {
- avahi_log_warn("ioctl(): %s", strerror(errno));
- goto fail;
- }
-
- p = avahi_dns_packet_new(ms + AVAHI_DNS_PACKET_EXTRA_SIZE);
-
- io.iov_base = AVAHI_DNS_PACKET_DATA(p);
- io.iov_len = p->max_size;
-
- memset(&msg, 0, sizeof(msg));
- msg.msg_name = &sa;
- msg.msg_namelen = sizeof(sa);
- msg.msg_iov = &io;
- msg.msg_iovlen = 1;
- msg.msg_control = aux;
- msg.msg_controllen = sizeof(aux);
- msg.msg_flags = 0;
-
- if ((l = recvmsg(fd, &msg, 0)) < 0) {
- avahi_log_warn("recvmsg(): %s", strerror(errno));
- goto fail;
- }
-
- if (sa.sin_addr.s_addr == INADDR_ANY) {
- /* Linux 2.4 behaves very strangely sometimes! */
- goto fail;
- }
-
- assert(!(msg.msg_flags & MSG_CTRUNC));
- assert(!(msg.msg_flags & MSG_TRUNC));
-
- p->size = (size_t) l;
-
- if (ret_src_port)
- *ret_src_port = avahi_port_from_sockaddr((struct sockaddr*) &sa);
-
- if (ret_src_address) {
- AvahiAddress a;
- avahi_address_from_sockaddr((struct sockaddr*) &sa, &a);
- *ret_src_address = a.data.ipv4;
- }
-
- if (ret_ttl)
- *ret_ttl = 255;
-
- if (ret_iface)
- *ret_iface = AVAHI_IF_UNSPEC;
-
- for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
-
- if (cmsg->cmsg_level == IPPROTO_IP) {
-
- switch (cmsg->cmsg_type) {
-#ifdef IP_RECVTTL
- case IP_RECVTTL:
-#endif
- case IP_TTL:
- if (ret_ttl)
- *ret_ttl = (uint8_t) (*(int *) CMSG_DATA(cmsg));
-
- break;
-
-#ifdef IP_PKTINFO
- case IP_PKTINFO: {
- struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg);
-
- if (ret_iface)
- *ret_iface = (int) i->ipi_ifindex;
-
- if (ret_dst_address)
- ret_dst_address->address = i->ipi_addr.s_addr;
-
- found_addr = 1;
-
- break;
- }
-#endif
-
-#ifdef IP_RECVIF
- case IP_RECVIF: {
- struct sockaddr_dl *sdl = (struct sockaddr_dl *) CMSG_DATA (cmsg);
-
- if (ret_iface)
-#ifdef __sun
- *ret_iface = *(uint_t*) sdl;
-#else
- *ret_iface = (int) sdl->sdl_index;
-#endif
-
- break;
- }
-#endif
-
-#ifdef IP_RECVDSTADDR
- case IP_RECVDSTADDR:
- if (ret_dst_address)
- memcpy(&ret_dst_address->address, CMSG_DATA (cmsg), 4);
-
- found_addr = 1;
- break;
-#endif
-
- default:
- avahi_log_warn("Unhandled cmsg_type : %d", cmsg->cmsg_type);
- break;
- }
- }
- }
-
- assert(found_addr);
-
- return p;
-
-fail:
- if (p)
- avahi_dns_packet_free(p);
-
- return NULL;
-}
-
-AvahiDnsPacket *avahi_recv_dns_packet_ipv6(int fd, AvahiIPv6Address *ret_src_address, uint16_t *ret_src_port, AvahiIPv6Address *ret_dst_address, AvahiIfIndex *ret_iface, uint8_t *ret_ttl) {
- AvahiDnsPacket *p = NULL;
- struct msghdr msg;
- struct iovec io;
- size_t aux[1024 / sizeof(size_t)];
- ssize_t l;
- int ms;
- struct cmsghdr *cmsg;
- int found_ttl = 0, found_iface = 0;
- struct sockaddr_in6 sa;
-
- assert(fd >= 0);
-
- if (ioctl(fd, FIONREAD, &ms) < 0) {
- avahi_log_warn("ioctl(): %s", strerror(errno));
- goto fail;
- }
-
- p = avahi_dns_packet_new(ms + AVAHI_DNS_PACKET_EXTRA_SIZE);
-
- io.iov_base = AVAHI_DNS_PACKET_DATA(p);
- io.iov_len = p->max_size;
-
- memset(&msg, 0, sizeof(msg));
- msg.msg_name = (struct sockaddr*) &sa;
- msg.msg_namelen = sizeof(sa);
-
- msg.msg_iov = &io;
- msg.msg_iovlen = 1;
- msg.msg_control = aux;
- msg.msg_controllen = sizeof(aux);
- msg.msg_flags = 0;
-
- if ((l = recvmsg(fd, &msg, 0)) < 0) {
- avahi_log_warn("recvmsg(): %s", strerror(errno));
- goto fail;
- }
-
- assert(!(msg.msg_flags & MSG_CTRUNC));
- assert(!(msg.msg_flags & MSG_TRUNC));
-
- p->size = (size_t) l;
-
- if (ret_src_port)
- *ret_src_port = avahi_port_from_sockaddr((struct sockaddr*) &sa);
-
- if (ret_src_address) {
- AvahiAddress a;
- avahi_address_from_sockaddr((struct sockaddr*) &sa, &a);
- *ret_src_address = a.data.ipv6;
- }
-
- for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
-
- if (cmsg->cmsg_level == IPPROTO_IPV6) {
-
- switch (cmsg->cmsg_type) {
-
- case IPV6_HOPLIMIT:
-
- if (ret_ttl)
- *ret_ttl = (uint8_t) (*(int *) CMSG_DATA(cmsg));
-
- found_ttl = 1;
-
- break;
-
- case IPV6_PKTINFO: {
- struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg);
-
- if (ret_iface)
- *ret_iface = i->ipi6_ifindex;
-
- if (ret_dst_address)
- memcpy(ret_dst_address->address, i->ipi6_addr.s6_addr, 16);
-
- found_iface = 1;
- break;
- }
-
- default:
- avahi_log_warn("Unhandled cmsg_type : %d", cmsg->cmsg_type);
- break;
- }
- }
- }
-
- assert(found_iface);
- assert(found_ttl);
-
- return p;
-
-fail:
- if (p)
- avahi_dns_packet_free(p);
-
- return NULL;
-}
-
-int avahi_open_unicast_socket_ipv4(void) {
- struct sockaddr_in local;
- int fd = -1;
-
- if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
- avahi_log_warn("socket() failed: %s", strerror(errno));
- goto fail;
- }
-
- memset(&local, 0, sizeof(local));
- local.sin_family = AF_INET;
-
- if (bind(fd, (struct sockaddr*) &local, sizeof(local)) < 0) {
- avahi_log_warn("bind() failed: %s", strerror(errno));
- goto fail;
- }
-
- if (ipv4_pktinfo(fd) < 0) {
- goto fail;
- }
-
- if (avahi_set_cloexec(fd) < 0) {
- avahi_log_warn("FD_CLOEXEC failed: %s", strerror(errno));
- goto fail;
- }
-
- if (avahi_set_nonblock(fd) < 0) {
- avahi_log_warn("O_NONBLOCK failed: %s", strerror(errno));
- goto fail;
- }
-
- return fd;
-
-fail:
- if (fd >= 0)
- close(fd);
-
- return -1;
-}
-
-int avahi_open_unicast_socket_ipv6(void) {
- struct sockaddr_in6 local;
- int fd = -1;
-
- if ((fd = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
- avahi_log_warn("socket() failed: %s", strerror(errno));
- goto fail;
- }
-
- memset(&local, 0, sizeof(local));
- local.sin6_family = AF_INET6;
-
- if (bind(fd, (struct sockaddr*) &local, sizeof(local)) < 0) {
- avahi_log_warn("bind() failed: %s", strerror(errno));
- goto fail;
- }
-
- if (ipv6_pktinfo(fd) < 0)
- goto fail;
-
- if (avahi_set_cloexec(fd) < 0) {
- avahi_log_warn("FD_CLOEXEC failed: %s", strerror(errno));
- goto fail;
- }
-
- if (avahi_set_nonblock(fd) < 0) {
- avahi_log_warn("O_NONBLOCK failed: %s", strerror(errno));
- goto fail;
- }
-
- return fd;
-
-fail:
- if (fd >= 0)
- close(fd);
-
- return -1;
-}
generated by cgit (git 2.34.1) at 2025-10-03 14:35:35 +0000