#include <errno.h>
#include <string.h>
#include <stdio.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/time.h>
-#include <net/if.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 "util.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) {
- g_assert(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) {
-
- g_assert(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, guint16 port) {
- g_assert(ret_sa);
- g_assert(a);
- g_assert(port > 0);
+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;
memcpy(&ret_sa->sin_addr, a, sizeof(AvahiIPv4Address));
}
-static void ipv6_address_to_sockaddr(struct sockaddr_in6 *ret_sa, const AvahiIPv6Address *a, guint16 port) {
- g_assert(ret_sa);
- g_assert(a);
- g_assert(port > 0);
+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;
memcpy(&ret_sa->sin6_addr, a, sizeof(AvahiIPv6Address));
}
-int avahi_mdns_mcast_join_ipv4(gint fd, gint idx) {
- struct ip_mreqn mreq;
+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;
- mdns_mcast_group_ipv4 (&sa);
-
+ assert(fd >= 0);
+ assert(idx >= 0);
+ assert(a);
+
memset(&mreq, 0, sizeof(mreq));
- mreq.imr_multiaddr = sa.sin_addr;
+#ifdef HAVE_STRUCT_IP_MREQN
mreq.imr_ifindex = idx;
-
- if (setsockopt(fd, SOL_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) {
- avahi_log_warn("IP_ADD_MEMBERSHIP failed: %s\n", strerror(errno));
+ 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(gint fd, gint idx) {
+int avahi_mdns_mcast_join_ipv6(int fd, const AvahiIPv6Address *a, int idx, int join) {
struct ipv6_mreq mreq6;
struct sockaddr_in6 sa6;
- mdns_mcast_group_ipv6 (&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 (setsockopt(fd, SOL_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
- avahi_log_warn("IPV6_ADD_MEMBERSHIP failed: %s\n", strerror(errno));
+ 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;
}
-int avahi_mdns_mcast_leave_ipv4(gint fd, gint idx) {
- struct ip_mreqn mreq;
- struct sockaddr_in sa;
+static int reuseaddr(int fd) {
+ int yes;
- mdns_mcast_group_ipv4 (&sa);
-
- memset(&mreq, 0, sizeof(mreq));
- mreq.imr_multiaddr = sa.sin_addr;
- mreq.imr_ifindex = idx;
-
- if (setsockopt(fd, SOL_IP, IP_DROP_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) {
- avahi_log_warn("IP_DROP_MEMBERSHIP failed: %s\n", strerror(errno));
+ yes = 1;
+ if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0) {
+ avahi_log_warn("SO_REUSEADDR failed: %s", strerror(errno));
return -1;
}
-
- return 0;
-}
-
-int avahi_mdns_mcast_leave_ipv6(gint fd, gint idx) {
- struct ipv6_mreq mreq6;
- struct sockaddr_in6 sa6;
-
- mdns_mcast_group_ipv6 (&sa6);
-
- memset(&mreq6, 0, sizeof(mreq6));
- mreq6.ipv6mr_multiaddr = sa6.sin6_addr;
- mreq6.ipv6mr_interface = idx;
-
- if (setsockopt(fd, SOL_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
- avahi_log_warn("IPV6_DROP_MEMBERSHIP failed: %s\n", strerror(errno));
+
+#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 gint bind_with_warn(int fd, const struct sockaddr *sa, socklen_t l) {
- gint yes;
+static int bind_with_warn(int fd, const struct sockaddr *sa, socklen_t l) {
- g_assert(fd >= 0);
- g_assert(sa);
- g_assert(l > 0);
+ assert(fd >= 0);
+ assert(sa);
+ assert(l > 0);
if (bind(fd, sa, l) < 0) {
if (errno != EADDRINUSE) {
- avahi_log_warn("bind() failed: %s\n", strerror(errno));
+ avahi_log_warn("bind() failed: %s", strerror(errno));
return -1;
}
sa->sa_family == AF_INET ? "IPv4" : "IPv6");
/* Try again, this time with SO_REUSEADDR set */
- yes = 1;
- if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("SO_REUSEADDR failed: %s\n", strerror(errno));
+ if (reuseaddr(fd) < 0)
return -1;
- }
-
+
if (bind(fd, sa, l) < 0) {
- avahi_log_warn("bind() failed: %s\n", strerror(errno));
+ avahi_log_warn("bind() failed: %s", strerror(errno));
return -1;
}
} else {
* user may run other mDNS implementations if he really
* wants. */
- yes = 1;
- if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("SO_REUSEADDR failed: %s\n", strerror(errno));
+ if (reuseaddr(fd) < 0)
return -1;
- }
}
return 0;
}
-gint avahi_open_socket_ipv4(void) {
+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, ttl, yes;
+ int fd = -1, r, ittl;
+ uint8_t ttl, cyes;
if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
- avahi_log_warn("socket() failed: %s\n", strerror(errno));
+ avahi_log_warn("socket() failed: %s", strerror(errno));
goto fail;
}
ttl = 255;
- if (setsockopt(fd, SOL_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)) < 0) {
- avahi_log_warn("IP_MULTICAST_TTL failed: %s\n", strerror(errno));
+ if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)) < 0) {
+ avahi_log_warn("IP_MULTICAST_TTL failed: %s", strerror(errno));
goto fail;
}
- ttl = 255;
- if (setsockopt(fd, SOL_IP, IP_TTL, &ttl, sizeof(ttl)) < 0) {
- avahi_log_warn("IP_TTL failed: %s\n", strerror(errno));
+ ittl = 255;
+ if (setsockopt(fd, IPPROTO_IP, IP_TTL, &ittl, sizeof(ittl)) < 0) {
+ avahi_log_warn("IP_TTL failed: %s", strerror(errno));
goto fail;
}
- yes = 1;
- if (setsockopt(fd, SOL_IP, IP_MULTICAST_LOOP, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IP_MULTICAST_LOOP failed: %s\n", strerror(errno));
+ 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;
}
local.sin_family = AF_INET;
local.sin_port = htons(AVAHI_MDNS_PORT);
- if (bind_with_warn(fd, (struct sockaddr*) &local, sizeof(local)) < 0)
- goto fail;
+ if (no_reuse)
+ r = bind(fd, (struct sockaddr*) &local, sizeof(local));
+ else
+ r = bind_with_warn(fd, (struct sockaddr*) &local, sizeof(local));
- yes = 1;
- if (setsockopt(fd, SOL_IP, IP_RECVTTL, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IP_RECVTTL failed: %s\n", strerror(errno));
+ if (r < 0)
goto fail;
- }
- yes = 1;
- if (setsockopt(fd, SOL_IP, IP_PKTINFO, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IP_PKTINFO failed: %s\n", strerror(errno));
- goto fail;
- }
-
+ if (ipv4_pktinfo (fd) < 0)
+ goto fail;
+
if (avahi_set_cloexec(fd) < 0) {
- avahi_log_warn("FD_CLOEXEC failed: %s\n", strerror(errno));
+ avahi_log_warn("FD_CLOEXEC failed: %s", strerror(errno));
goto fail;
}
if (avahi_set_nonblock(fd) < 0) {
- avahi_log_warn("O_NONBLOCK failed: %s\n", strerror(errno));
+ avahi_log_warn("O_NONBLOCK failed: %s", strerror(errno));
goto fail;
}
return -1;
}
-gint avahi_open_socket_ipv6(void) {
+int avahi_open_socket_ipv6(int no_reuse) {
struct sockaddr_in6 sa, local;
- int fd = -1, ttl, yes;
+ 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\n", strerror(errno));
+ avahi_log_warn("socket() failed: %s", strerror(errno));
goto fail;
}
ttl = 255;
- if (setsockopt(fd, SOL_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof(ttl)) < 0) {
- avahi_log_warn("IPV6_MULTICAST_HOPS failed: %s\n", strerror(errno));
+ 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, SOL_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof(ttl)) < 0) {
- avahi_log_warn("IPV6_UNICAST_HOPS failed: %s\n", strerror(errno));
+ 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, SOL_IPV6, IPV6_V6ONLY, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IPV6_V6ONLY failed: %s\n", strerror(errno));
+ 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, SOL_IPV6, IPV6_MULTICAST_LOOP, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IPV6_MULTICAST_LOOP failed: %s\n", strerror(errno));
+ if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &yes, sizeof(yes)) < 0) {
+ avahi_log_warn("IPV6_MULTICAST_LOOP failed: %s", strerror(errno));
goto fail;
}
local.sin6_family = AF_INET6;
local.sin6_port = htons(AVAHI_MDNS_PORT);
- if (bind_with_warn(fd, (struct sockaddr*) &local, sizeof(local)) < 0)
- goto fail;
+ if (no_reuse)
+ r = bind(fd, (struct sockaddr*) &local, sizeof(local));
+ else
+ r = bind_with_warn(fd, (struct sockaddr*) &local, sizeof(local));
- yes = 1;
- if (setsockopt(fd, SOL_IPV6, IPV6_HOPLIMIT, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IPV6_HOPLIMIT failed: %s\n", strerror(errno));
+ if (r < 0)
goto fail;
- }
- yes = 1;
- if (setsockopt(fd, SOL_IPV6, IPV6_PKTINFO, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IPV6_PKTINFO failed: %s\n", strerror(errno));
+ if (ipv6_pktinfo(fd) < 0)
goto fail;
- }
if (avahi_set_cloexec(fd) < 0) {
- avahi_log_warn("FD_CLOEXEC failed: %s\n", strerror(errno));
+ avahi_log_warn("FD_CLOEXEC failed: %s", strerror(errno));
goto fail;
}
if (avahi_set_nonblock(fd) < 0) {
- avahi_log_warn("O_NONBLOCK failed: %s\n", strerror(errno));
+ avahi_log_warn("O_NONBLOCK failed: %s", strerror(errno));
goto fail;
}
return -1;
}
-static gint sendmsg_loop(gint fd, struct msghdr *msg, gint flags) {
- g_assert(fd >= 0);
- g_assert(msg);
+static int sendmsg_loop(int fd, struct msghdr *msg, int flags) {
+ assert(fd >= 0);
+ assert(msg);
for (;;) {
break;
if (errno != EAGAIN) {
- avahi_log_debug("sendmsg() failed: %s\n", strerror(errno));
+ avahi_log_debug("sendmsg() failed: %s", strerror(errno));
return -1;
}
return 0;
}
-gint avahi_send_dns_packet_ipv4(gint fd, gint interface, AvahiDnsPacket *p, const AvahiIPv4Address *a, guint16 port) {
+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;
- struct in_pktinfo *pkti;
- uint8_t cmsg_data[sizeof(struct cmsghdr) + sizeof(struct in_pktinfo)];
+ 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
- g_assert(fd >= 0);
- g_assert(p);
- g_assert(avahi_dns_packet_check_valid(p) >= 0);
- g_assert(!a || port > 0);
+ assert(fd >= 0);
+ assert(p);
+ assert(avahi_dns_packet_check_valid(p) >= 0);
+ assert(!dst_address || dst_port > 0);
- if (!a)
+ if (!dst_address)
mdns_mcast_group_ipv4(&sa);
else
- ipv4_address_to_sockaddr(&sa, a, port);
+ 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(cmsg_data, 0, sizeof(cmsg_data));
- cmsg = (struct cmsghdr*) cmsg_data;
- cmsg->cmsg_len = sizeof(cmsg_data);
- cmsg->cmsg_level = IPPROTO_IP;
- cmsg->cmsg_type = IP_PKTINFO;
-
- pkti = (struct in_pktinfo*) (cmsg_data + sizeof(struct cmsghdr));
- pkti->ipi_ifindex = interface;
-
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 = cmsg_data;
- msg.msg_controllen = sizeof(cmsg_data);
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);
- return sendmsg_loop(fd, &msg, 0 /*MSG_DONTROUTE*/);
+ 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);
}
-gint avahi_send_dns_packet_ipv6(gint fd, gint interface, AvahiDnsPacket *p, const AvahiIPv6Address *a, guint16 port) {
+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;
- struct in6_pktinfo *pkti;
- uint8_t cmsg_data[sizeof(struct cmsghdr) + sizeof(struct in6_pktinfo)];
+ uint8_t cmsg_data[CMSG_SPACE(sizeof(struct in6_pktinfo))];
- g_assert(fd >= 0);
- g_assert(p);
- g_assert(avahi_dns_packet_check_valid(p) >= 0);
+ assert(fd >= 0);
+ assert(p);
+ assert(avahi_dns_packet_check_valid(p) >= 0);
+ assert(!dst_address || dst_port > 0);
- if (!a)
+ if (!dst_address)
mdns_mcast_group_ipv6(&sa);
else
- ipv6_address_to_sockaddr(&sa, a, port);
+ 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(cmsg_data, 0, sizeof(cmsg_data));
- cmsg = (struct cmsghdr*) cmsg_data;
- cmsg->cmsg_len = sizeof(cmsg_data);
- cmsg->cmsg_level = IPPROTO_IPV6;
- cmsg->cmsg_type = IPV6_PKTINFO;
-
- pkti = (struct in6_pktinfo*) (cmsg_data + sizeof(struct cmsghdr));
- pkti->ipi6_ifindex = interface;
-
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 = cmsg_data;
- msg.msg_controllen = sizeof(cmsg_data);
msg.msg_flags = 0;
- return sendmsg_loop(fd, &msg, 0 /*MSG_DONTROUTE*/);
+ 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(gint fd, struct sockaddr_in *ret_sa, AvahiIPv4Address *ret_dest_address, gint *ret_iface, guint8* ret_ttl) {
+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;
- uint8_t aux[1024];
+ size_t aux[1024 / sizeof(size_t)]; /* for alignment on ia64 ! */
ssize_t l;
struct cmsghdr *cmsg;
- gboolean found_ttl = FALSE, found_iface = FALSE;
- gint ms;
+ int found_addr = 0;
+ int ms;
+ struct sockaddr_in sa;
- g_assert(fd >= 0);
- g_assert(ret_sa);
- g_assert(ret_dest_address);
- g_assert(ret_iface);
- g_assert(ret_ttl);
+ assert(fd >= 0);
if (ioctl(fd, FIONREAD, &ms) < 0) {
avahi_log_warn("ioctl(): %s", strerror(errno));
io.iov_len = p->max_size;
memset(&msg, 0, sizeof(msg));
- msg.msg_name = ret_sa;
- msg.msg_namelen = sizeof(struct sockaddr_in);
+ msg.msg_name = &sa;
+ msg.msg_namelen = sizeof(sa);
msg.msg_iov = &io;
msg.msg_iovlen = 1;
msg.msg_control = aux;
goto fail;
}
- if (ret_sa->sin_addr.s_addr == INADDR_ANY) {
+ if (sa.sin_addr.s_addr == INADDR_ANY) {
/* Linux 2.4 behaves very strangely sometimes! */
-
- /*avahi_hexdump(AVAHI_DNS_PACKET_DATA(p), l); */
goto fail;
}
-
- g_assert(!(msg.msg_flags & MSG_CTRUNC));
- g_assert(!(msg.msg_flags & MSG_TRUNC));
+
+ assert(!(msg.msg_flags & MSG_CTRUNC));
+ assert(!(msg.msg_flags & MSG_TRUNC));
+
p->size = (size_t) l;
-
- *ret_ttl = 0;
-/* avahi_hexdump(msg.msg_control, msg.msg_controllen); */
-
- for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
+ 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;
+ }
-/* avahi_hexdump(CMSG_DATA(cmsg), cmsg->cmsg_len - sizeof(struct cmsghdr)); */
+ 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 == SOL_IP) {
+ 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
- if (cmsg->cmsg_type == IP_TTL) {
- *ret_ttl = (uint8_t) (*(int *) CMSG_DATA(cmsg));
- found_ttl = TRUE;
- } else if (cmsg->cmsg_type == IP_PKTINFO) {
- struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg);
- *ret_iface = (gint) i->ipi_ifindex;
- ret_dest_address->address = i->ipi_addr.s_addr;
- found_iface = TRUE;
+#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;
}
}
}
-/* avahi_log_debug("ttl=%u iface=%i", *ret_ttl, *ret_iface); */
-
- g_assert(found_iface);
- g_assert(found_ttl);
+ assert(found_addr);
return p;
return NULL;
}
-AvahiDnsPacket* avahi_recv_dns_packet_ipv6(gint fd, struct sockaddr_in6 *ret_sa, AvahiIPv6Address *ret_dest_address, gint *ret_iface, guint8* ret_ttl) {
+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;
- uint8_t aux[64];
+ size_t aux[1024 / sizeof(size_t)];
ssize_t l;
- gint ms;
-
+ int ms;
struct cmsghdr *cmsg;
- gboolean found_ttl = FALSE, found_iface = FALSE;
+ int found_ttl = 0, found_iface = 0;
+ struct sockaddr_in6 sa;
- g_assert(fd >= 0);
- g_assert(ret_sa);
- g_assert(ret_dest_address);
- g_assert(ret_iface);
- g_assert(ret_ttl);
+ assert(fd >= 0);
if (ioctl(fd, FIONREAD, &ms) < 0) {
avahi_log_warn("ioctl(): %s", strerror(errno));
io.iov_len = p->max_size;
memset(&msg, 0, sizeof(msg));
- msg.msg_name = ret_sa;
- msg.msg_namelen = sizeof(struct sockaddr_in6);
+ msg.msg_name = (struct sockaddr*) &sa;
+ msg.msg_namelen = sizeof(sa);
+
msg.msg_iov = &io;
msg.msg_iovlen = 1;
msg.msg_control = aux;
goto fail;
}
+ assert(!(msg.msg_flags & MSG_CTRUNC));
+ assert(!(msg.msg_flags & MSG_TRUNC));
+
p->size = (size_t) l;
-
- *ret_ttl = 0;
+
+ 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 == SOL_IPV6 && cmsg->cmsg_type == IPV6_HOPLIMIT) {
- *ret_ttl = (uint8_t) (*(int *) CMSG_DATA(cmsg));
- found_ttl = TRUE;
- }
-
- if (cmsg->cmsg_level == SOL_IPV6 && cmsg->cmsg_type == IPV6_PKTINFO) {
- struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg);
- *ret_iface = i->ipi6_ifindex;
- memcpy(ret_dest_address->address, i->ipi6_addr.s6_addr, 16);
- found_iface = TRUE;
+
+ 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;
+ }
}
}
- g_assert(found_iface);
- g_assert(found_ttl);
+ assert(found_iface);
+ assert(found_ttl);
return p;
return NULL;
}
-gint avahi_open_legacy_unicast_socket_ipv4(void) {
+int avahi_open_unicast_socket_ipv4(void) {
struct sockaddr_in local;
- int fd = -1, yes;
+ int fd = -1;
if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
- avahi_log_warn("socket() failed: %s\n", strerror(errno));
+ avahi_log_warn("socket() failed: %s", strerror(errno));
goto fail;
}
local.sin_family = AF_INET;
if (bind(fd, (struct sockaddr*) &local, sizeof(local)) < 0) {
- avahi_log_warn("bind() failed: %s\n", strerror(errno));
+ avahi_log_warn("bind() failed: %s", strerror(errno));
goto fail;
}
- yes = 1;
- if (setsockopt(fd, SOL_IP, IP_RECVTTL, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IP_RECVTTL failed: %s\n", strerror(errno));
- goto fail;
+ if (ipv4_pktinfo(fd) < 0) {
+ goto fail;
}
- yes = 1;
- if (setsockopt(fd, SOL_IP, IP_PKTINFO, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IP_PKTINFO failed: %s\n", strerror(errno));
- goto fail;
- }
-
if (avahi_set_cloexec(fd) < 0) {
- avahi_log_warn("FD_CLOEXEC failed: %s\n", strerror(errno));
+ avahi_log_warn("FD_CLOEXEC failed: %s", strerror(errno));
goto fail;
}
if (avahi_set_nonblock(fd) < 0) {
- avahi_log_warn("O_NONBLOCK failed: %s\n", strerror(errno));
+ avahi_log_warn("O_NONBLOCK failed: %s", strerror(errno));
goto fail;
}
return -1;
}
-gint avahi_open_legacy_unicast_socket_ipv6(void) {
- struct sockaddr_in local;
- int fd = -1, yes;
+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\n", strerror(errno));
+ avahi_log_warn("socket() failed: %s", strerror(errno));
goto fail;
}
memset(&local, 0, sizeof(local));
- local.sin_family = AF_INET;
+ local.sin6_family = AF_INET6;
if (bind(fd, (struct sockaddr*) &local, sizeof(local)) < 0) {
- avahi_log_warn("bind() failed: %s\n", strerror(errno));
+ avahi_log_warn("bind() failed: %s", strerror(errno));
goto fail;
}
- yes = 1;
- if (setsockopt(fd, SOL_IPV6, IPV6_HOPLIMIT, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IPV6_HOPLIMIT failed: %s\n", strerror(errno));
- goto fail;
- }
-
- yes = 1;
- if (setsockopt(fd, SOL_IPV6, IPV6_PKTINFO, &yes, sizeof(yes)) < 0) {
- avahi_log_warn("IPV6_PKTINFO failed: %s\n", strerror(errno));
+ if (ipv6_pktinfo(fd) < 0)
goto fail;
- }
if (avahi_set_cloexec(fd) < 0) {
- avahi_log_warn("FD_CLOEXEC failed: %s\n", strerror(errno));
+ avahi_log_warn("FD_CLOEXEC failed: %s", strerror(errno));
goto fail;
}
if (avahi_set_nonblock(fd) < 0) {
- avahi_log_warn("O_NONBLOCK failed: %s\n", strerror(errno));
+ avahi_log_warn("O_NONBLOCK failed: %s", strerror(errno));
goto fail;
}
projects / catta / blobdiff