nc: port nc 1.10 to busybox

1 files changed, 0 insertions, 163 deletions

diff --git a/ipsvd/udp_io.c b/ipsvd/udp_io.c
deleted file mode 100644
index 592d98b58..000000000
--- a/ipsvd/udp_io.c
+++ /dev/null
@@ -1,163 +0,0 @@
-/* Thus far used only by udpsvd.c */
-
-void socket_want_pktinfo(int fd);
-ssize_t send_to_from(int fd, void *buf, size_t len, int flags,
-		const struct sockaddr *from, const struct sockaddr *to,
-		socklen_t tolen);
-ssize_t recv_from_to(int fd, void *buf, size_t len, int flags,
-		struct sockaddr *from, struct sockaddr *to,
-		socklen_t sa_size);
-
-/*
- * This asks kernel to let us know dst addr/port of incoming packets
- * We don't check for errors here. Not supported == won't be used
- */
-void
-socket_want_pktinfo(int fd)
-{
-#ifdef IP_PKTINFO
-	setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &const_int_1, sizeof(int));
-#endif
-#if ENABLE_FEATURE_IPV6 && defined(IPV6_PKTINFO)
-	setsockopt(fd, IPPROTO_IPV6, IPV6_PKTINFO, &const_int_1, sizeof(int));
-#endif
-}
-
-
-#ifdef UNUSED
-ssize_t
-send_to_from(int fd, void *buf, size_t len, int flags,
-		const struct sockaddr *from, const struct sockaddr *to,
-		socklen_t tolen)
-{
-#ifndef IP_PKTINFO
-	return sendto(fd, buf, len, flags, to, tolen);
-#else
-	struct iovec iov[1];
-	struct msghdr msg;
-	char cbuf[sizeof(struct in_pktinfo)
-#if ENABLE_FEATURE_IPV6 && defined(IPV6_PKTINFO)
-		| sizeof(struct in6_pktinfo) /* (a|b) is poor man's max(a,b) */
-#endif
-	];
-	struct cmsghdr* cmsgptr;
-
-	if (from->sa_family != AF_INET
-#if ENABLE_FEATURE_IPV6
-	 && from->sa_family != AF_INET6
-#endif
-	) {
-		/* ANY local address */
-		return sendto(fd, buf, len, flags, to, tolen);
-	}
-	
-	/* man recvmsg and man cmsg is needed to make sense of code below */
-
-	iov[0].iov_base = buf;
-	iov[0].iov_len = len;
-
-	memset(cbuf, 0, sizeof(cbuf));
-
-	memset(&msg, 0, sizeof(msg));
-	msg.msg_name = (void *)(struct sockaddr *)to; /* or compiler will annoy us */
-	msg.msg_namelen = tolen;
-	msg.msg_iov = iov;
-	msg.msg_iovlen = 1;
-	msg.msg_control = cbuf;
-	msg.msg_controllen = sizeof(cbuf);
-	msg.msg_flags = flags;
-
-	cmsgptr = CMSG_FIRSTHDR(&msg);
-	if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
-		struct in_pktinfo *pktptr;
-		cmsgptr->cmsg_level = IPPROTO_IP;
-		cmsgptr->cmsg_type = IP_PKTINFO;
-		cmsgptr->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
-		pktptr = (struct in_pktinfo *)(CMSG_DATA(cmsgptr));
-		/* pktptr->ipi_ifindex = 0; -- already done by memset(cbuf...) */
-		pktptr->ipi_spec_dst = ((struct sockaddr_in*)from)->sin_addr;
-	}
-#if ENABLE_FEATURE_IPV6 && defined(IPV6_PKTINFO)
-	else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
-		struct in6_pktinfo *pktptr;
-		cmsgptr->cmsg_level = IPPROTO_IPV6;
-		cmsgptr->cmsg_type = IPV6_PKTINFO;
-		cmsgptr->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
-		pktptr = (struct in6_pktinfo *)(CMSG_DATA(cmsgptr));
-		/* pktptr->ipi6_ifindex = 0; -- already done by memset(cbuf...) */
-		pktptr->ipi6_addr = ((struct sockaddr_in6*)from)->sin6_addr;
-	}
-#endif
-	return sendmsg(fd, &msg, flags);
-#endif
-}
-#endif /* UNUSED */
-
-/* NB: this will never set port# in 'to'!
- * _Only_ IP/IPv6 address part of 'to' is _maybe_ modified.
- * Typical usage is to preinit 'to' with "default" value
- * before calling recv_from_to(). */
-ssize_t
-recv_from_to(int fd, void *buf, size_t len, int flags,
-		struct sockaddr *from, struct sockaddr *to,
-		socklen_t sa_size)
-{
-#ifndef IP_PKTINFO
-	return recvfrom(fd, buf, len, flags, from, &sa_size);
-#else
-	/* man recvmsg and man cmsg is needed to make sense of code below */
-	struct iovec iov[1];
-	union {
-		char cmsg[CMSG_SPACE(sizeof(struct in_pktinfo))];
-		char cmsg6[CMSG_SPACE(sizeof(struct in6_pktinfo))];
-	} u;
-	struct cmsghdr *cmsgptr;
-	struct msghdr msg;
-	socklen_t recv_length;
-
-	iov[0].iov_base = buf;
-	iov[0].iov_len = len;
-
-	memset(&msg, 0, sizeof(msg));
-	msg.msg_name = (struct sockaddr *)from;
-	msg.msg_namelen = sa_size;
-	msg.msg_iov = iov;
-	msg.msg_iovlen = 1;
-	msg.msg_control = &u;
-	msg.msg_controllen = sizeof(u);
-
-	recv_length = recvmsg(fd, &msg, flags);
-	if (recv_length < 0)
-		return recv_length;
-
-	/* Here we try to retrieve destination IP and memorize it */
-	for (cmsgptr = CMSG_FIRSTHDR(&msg);
-			cmsgptr != NULL;
-			cmsgptr = CMSG_NXTHDR(&msg, cmsgptr)
-	) {
-		if (cmsgptr->cmsg_level == IPPROTO_IP
-		 && cmsgptr->cmsg_type == IP_PKTINFO
-		) {
-#define pktinfo(cmsgptr) ( (struct in_pktinfo*)(CMSG_DATA(cmsgptr)) )
-			to->sa_family = AF_INET;
-			((struct sockaddr_in*)to)->sin_addr = pktinfo(cmsgptr)->ipi_addr;
-			/* ((struct sockaddr_in*)to)->sin_port = 123; */
-#undef pktinfo
-			break;
-		}
-#if ENABLE_FEATURE_IPV6 && defined(IPV6_PKTINFO)
-		if (cmsgptr->cmsg_level == IPPROTO_IPV6
-		 && cmsgptr->cmsg_type == IPV6_PKTINFO
-		) {
-#define pktinfo(cmsgptr) ( (struct in6_pktinfo*)(CMSG_DATA(cmsgptr)) )
-			to->sa_family = AF_INET6;
-			((struct sockaddr_in6*)to)->sin6_addr = pktinfo(cmsgptr)->ipi6_addr;
-			/* ((struct sockaddr_in6*)to)->sin6_port = 123; */
-#undef pktinfo
-			break;
-		}
-#endif
-	}
-	return recv_length;
-#endif
-}