build: Build mlibc + add distclean target

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 0 insertions, 512 deletions

diff --git a/lib/mlibc/options/posix/generic/lookup.cpp b/lib/mlibc/options/posix/generic/lookup.cpp
deleted file mode 100644
index f877fe5..0000000
--- a/lib/mlibc/options/posix/generic/lookup.cpp
+++ /dev/null
@@ -1,512 +0,0 @@
-#include <mlibc/lookup.hpp>
-#include <mlibc/resolv_conf.hpp>
-#include <mlibc/debug.hpp>
-#include <bits/ensure.h>
-
-#include <frg/string.hpp>
-#include <mlibc/allocator.hpp>
-#include <string.h>
-#include <errno.h>
-#include <arpa/inet.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <ctype.h>
-
-namespace mlibc {
-
-namespace {
-	constexpr unsigned int RECORD_A = 1;
-	constexpr unsigned int RECORD_CNAME = 5;
-	constexpr unsigned int RECORD_PTR = 12;
-}
-
-static frg::string<MemoryAllocator> read_dns_name(char *buf, char *&it) {
-	frg::string<MemoryAllocator> res{getAllocator()};
-	while (true) {
-		char code = *it++;
-		if ((code & 0xC0) == 0xC0) {
-			// pointer
-			uint8_t offset = ((code & 0x3F) << 8) | *it++;
-			auto offset_it = buf + offset;
-			return res + read_dns_name(buf, offset_it);
-		} else if (!(code & 0xC0)) {
-			if (!code)
-				break;
-
-			for (int i = 0; i < code; i++)
-				res += (*it++);
-
-			if (*it)
-				res += '.';
-		} else {
-			break;
-		}
-	}
-
-	return res;
-}
-
-int lookup_name_dns(struct lookup_result &buf, const char *name,
-		frg::string<MemoryAllocator> &canon_name) {
-	frg::string<MemoryAllocator> request{getAllocator()};
-
-	int num_q = 1;
-	struct dns_header header;
-	header.identification = htons(123);
-	header.flags = htons(0x100);
-	header.no_q = htons(num_q);
-	header.no_ans = htons(0);
-	header.no_auths = htons(0);
-	header.no_additional = htons(0);
-
-	request.resize(sizeof(header));
-	memcpy(request.data(), &header, sizeof(header));
-
-	const char *end = name;
-	while (*end != '\0') {
-		end = strchrnul(name, '.');
-		size_t length = end - name;
-		frg::string_view substring{name, length};
-		name += length + 1;
-		request += char(length);
-		request += substring;
-	}
-
-	request += char(0);
-	// set question type to fetch A records
-	request += 0;
-	request += 1;
-	// set CLASS to IN
-	request += 0;
-	request += 1;
-
-	struct sockaddr_in sin = {};
-	sin.sin_family = AF_INET;
-	// TODO(geert): we could probably make this use the service lookup
-	// for dns
-	sin.sin_port = htons(53);
-
-	auto nameserver = get_nameserver();
-	if (!inet_aton(nameserver ? nameserver->name.data() : "127.0.0.1", &sin.sin_addr)) {
-		mlibc::infoLogger() << "lookup_name_dns(): inet_aton() failed!" << frg::endlog;
-		return -EAI_SYSTEM;
-	}
-
-	int fd = socket(AF_INET, SOCK_DGRAM, 0);
-	if (fd < 0) {
-		mlibc::infoLogger() << "lookup_name_dns(): socket() failed" << frg::endlog;
-		return -EAI_SYSTEM;
-	}
-
-	size_t sent = sendto(fd, request.data(), request.size(), 0,
-			(struct sockaddr*)&sin, sizeof(sin));
-	if (sent != request.size()) {
-		mlibc::infoLogger() << "lookup_name_dns(): sendto() failed to send everything" << frg::endlog;
-		return -EAI_SYSTEM;
-	}
-
-	char response[256];
-	ssize_t rlen;
-	int num_ans = 0;
-	while ((rlen = recvfrom(fd, response, 256, 0, NULL, NULL)) >= 0) {
-		if ((size_t)rlen < sizeof(struct dns_header))
-			continue;
-		auto response_header = reinterpret_cast<struct dns_header*>(response);
-		if (response_header->identification != header.identification)
-			return -EAI_FAIL;
-
-		auto it = response + sizeof(struct dns_header);
-		for (int i = 0; i < ntohs(response_header->no_q); i++) {
-			auto dns_name = read_dns_name(response, it);
-			(void) dns_name;
-			it += 4;
-		}
-
-		for (int i = 0; i < ntohs(response_header->no_ans); i++) {
-			struct dns_addr_buf buffer;
-			auto dns_name = read_dns_name(response, it);
-
-			uint16_t rr_type = (it[0] << 8) | it[1];
-			uint16_t rr_class = (it[2] << 8) | it[3];
-			uint16_t rr_length = (it[8] << 8) | it[9];
-			it += 10;
-			(void)rr_class;
-
-			switch (rr_type) {
-				case RECORD_A:
-					memcpy(buffer.addr, it, rr_length);
-					it += rr_length;
-					buffer.family = AF_INET;
-					buffer.name = std::move(dns_name);
-					buf.buf.push(std::move(buffer));
-					break;
-				case RECORD_CNAME:
-					canon_name = read_dns_name(response, it);
-					buf.aliases.push(std::move(dns_name));
-					break;
-				default:
-					mlibc::infoLogger() << "lookup_name_dns: unknown rr type "
-						<< rr_type << frg::endlog;
-					break;
-			}
-		}
-		num_ans += ntohs(response_header->no_ans);
-
-		if (num_ans >= num_q)
-			break;
-	}
-
-	close(fd);
-	return buf.buf.size();
-}
-
-int lookup_addr_dns(frg::span<char> name, frg::array<uint8_t, 16> &addr, int family) {
-	frg::string<MemoryAllocator> request{getAllocator()};
-
-	int num_q = 1;
-	struct dns_header header;
-	header.identification = htons(123);
-	header.flags = htons(0x100);
-	header.no_q = htons(num_q);
-	header.no_ans = htons(0);
-	header.no_auths = htons(0);
-	header.no_additional = htons(0);
-
-	request.resize(sizeof(header));
-	memcpy(request.data(), &header, sizeof(header));
-
-	char addr_str[64];
-	if(!inet_ntop(family, addr.data(), addr_str, sizeof(addr_str))) {
-		switch(errno) {
-			case EAFNOSUPPORT:
-				return -EAI_FAMILY;
-			case ENOSPC:
-				return -EAI_OVERFLOW;
-			default:
-				return -EAI_FAIL;
-		}
-	}
-	frg::string<MemoryAllocator> req_str{getAllocator(), addr_str};
-	req_str += ".in-addr.arpa";
-
-	frg::string_view req_view{req_str.data(), req_str.size()};
-	size_t ptr = 0;
-	do {
-		size_t next = req_view.find_first('.', ptr);
-		size_t length = next != (size_t)-1 ? next - ptr : req_view.size() - ptr;
-		frg::string_view substring = req_view.sub_string(ptr, length);
-		request += char(length);
-		request += substring;
-		ptr = next + 1;
-	} while(ptr != 0);
-
-	request += char(0);
-	// set question type to fetch PTR records
-	request += 0;
-	request += 12;
-	// set CLASS to IN
-	request += 0;
-	request += 1;
-
-
-	struct sockaddr_in sin = {};
-	sin.sin_family = AF_INET;
-	// TODO(geert): we could probably make this use the service lookup
-	// for dns
-	sin.sin_port = htons(53);
-
-	auto nameserver = get_nameserver();
-	if (!inet_aton(nameserver ? nameserver->name.data() : "127.0.0.1", &sin.sin_addr)) {
-		mlibc::infoLogger() << "lookup_name_dns(): inet_aton() failed!" << frg::endlog;
-		return -EAI_SYSTEM;
-	}
-
-	int fd = socket(AF_INET, SOCK_DGRAM, 0);
-	if (fd < 0) {
-		mlibc::infoLogger() << "lookup_name_dns(): socket() failed" << frg::endlog;
-		return -EAI_SYSTEM;
-	}
-
-	size_t sent = sendto(fd, request.data(), request.size(), 0,
-			(struct sockaddr*)&sin, sizeof(sin));
-	if (sent != request.size()) {
-		mlibc::infoLogger() << "lookup_name_dns(): sendto() failed to send everything" << frg::endlog;
-		return -EAI_SYSTEM;
-	}
-
-	char response[256];
-	ssize_t rlen;
-	int num_ans = 0;
-	while ((rlen = recvfrom(fd, response, 256, 0, NULL, NULL)) >= 0) {
-		if ((size_t)rlen < sizeof(struct dns_header))
-			continue;
-		auto response_header = reinterpret_cast<struct dns_header*>(response);
-		if (response_header->identification != header.identification)
-			return -EAI_FAIL;
-
-		auto it = response + sizeof(struct dns_header);
-		for (int i = 0; i < ntohs(response_header->no_q); i++) {
-			auto dns_name = read_dns_name(response, it);
-			(void) dns_name;
-			it += 4;
-		}
-
-		for (int i = 0; i < ntohs(response_header->no_ans); i++) {
-			struct dns_addr_buf buffer;
-			auto dns_name = read_dns_name(response, it);
-
-			uint16_t rr_type = (it[0] << 8) | it[1];
-			uint16_t rr_class = (it[2] << 8) | it[3];
-			uint16_t rr_length = (it[8] << 8) | it[9];
-			it += 10;
-			(void)rr_class;
-			(void)rr_length;
-
-			(void)dns_name;
-
-			switch (rr_type) {
-				case RECORD_PTR: {
-					auto ptr_name = read_dns_name(response, it);
-					if (ptr_name.size() >= name.size())
-						return -EAI_OVERFLOW;
-					std::copy(ptr_name.begin(), ptr_name.end(), name.data());
-					name.data()[ptr_name.size()] = '\0';
-					return 1;
-				}
-				default:
-					mlibc::infoLogger() << "lookup_addr_dns: unknown rr type "
-						<< rr_type << frg::endlog;
-					break;
-			}
-			num_ans += ntohs(response_header->no_ans);
-
-			if (num_ans >= num_q)
-				break;
-		}
-	}
-
-	close(fd);
-	return 0;
-}
-
-int lookup_name_hosts(struct lookup_result &buf, const char *name,
-		frg::string<MemoryAllocator> &canon_name) {
-	auto file = fopen("/etc/hosts", "r");
-	if (!file) {
-		switch (errno) {
-			case ENOENT:
-			case ENOTDIR:
-			case EACCES:
-				return -EAI_SERVICE;
-			default:
-				return -EAI_SYSTEM;
-		}
-	}
-
-	char line[128];
-	int name_length = strlen(name);
-	while (fgets(line, 128, file)) {
-		char *pos;
-		// same way to deal with comments as in services.cpp
-		if ((pos = strchr(line, '#'))) {
-			*pos++ = '\n';
-			*pos = '\0';
-		}
-
-		for(pos = line + 1; (pos = strstr(pos, name)) &&
-				(!isspace(pos[-1]) || !isspace(pos[name_length])); pos++);
-		if (!pos)
-			continue;
-
-		for (pos = line; !isspace(*pos); pos++);
-		*pos = '\0';
-
-		// TODO(geert): we assume ipv4 for now
-		struct in_addr addr;
-		if (!inet_aton(line, &addr))
-			continue;
-
-		pos++;
-		for(; *pos && isspace(*pos); pos++);
-		char *end;
-		for(end = pos; *end && !isspace(*end); end++);
-
-		struct dns_addr_buf buffer;
-		memcpy(buffer.addr, &addr, 4);
-		buffer.family = AF_INET;
-		buffer.name = frg::string<MemoryAllocator>{pos,
-			static_cast<size_t>(end - pos), getAllocator()};
-		canon_name = buffer.name;
-
-		buf.buf.push(std::move(buffer));
-
-		pos = end;
-		while (pos[1]) {
-			for (; *pos && isspace(*pos); pos++);
-			for (end = pos; *end && !isspace(*end); end++);
-			auto name = frg::string<MemoryAllocator>{pos,
-				static_cast<size_t>(end - pos), getAllocator()};
-			buf.aliases.push(std::move(name));
-			pos = end;
-		}
-	}
-
-	fclose(file);
-	return buf.buf.size();
-}
-
-int lookup_addr_hosts(frg::span<char> name, frg::array<uint8_t, 16> &addr, int family) {
-	auto file = fopen("/etc/hosts", "r");
-	if (!file) {
-		switch (errno) {
-			case ENOENT:
-			case ENOTDIR:
-			case EACCES:
-				return -EAI_SERVICE;
-			default:
-				return -EAI_SYSTEM;
-		}
-	}
-
-	// Buffer to hold ASCII version of address
-	char addr_str[64];
-	if(!inet_ntop(family, addr.data(), addr_str, sizeof(addr_str))) {
-		switch(errno) {
-			case EAFNOSUPPORT:
-				return -EAI_FAMILY;
-			case ENOSPC:
-				return -EAI_OVERFLOW;
-			default:
-				return -EAI_FAIL;
-		}
-	}
-	int addr_str_len = strlen(addr_str);
-
-	char line[128];
-	while (fgets(line, 128, file)) {
-		char *pos;
-		// same way to deal with comments as in services.cpp
-		if ((pos = strchr(line, '#'))) {
-			*pos++ = '\n';
-			*pos = '\0';
-		}
-		if (strncmp(line, addr_str, addr_str_len))
-			continue;
-
-		for (pos = line + addr_str_len + 1; isspace(*pos); pos++);
-		char *begin = pos;
-		for (; !isspace(*pos); pos++);
-		char *end = pos;
-
-		size_t size = end - begin;
-		if (size >= name.size())
-			return -EAI_OVERFLOW;
-		std::copy(begin, end, name.data());
-		name.data()[size] = '\0';
-		return 1;
-	}
-	return 0;
-}
-
-int lookup_name_null(struct lookup_result &buf, int flags, int family) {
-	if (flags & AI_PASSIVE) {
-		if (family != AF_INET6) {
-			struct dns_addr_buf addr_buf;
-			addr_buf.family = AF_INET;
-
-			in_addr_t addr = INADDR_ANY;
-			memcpy(&addr_buf.addr, &addr, 4);
-
-			buf.buf.push_back(addr_buf);
-		}
-		if (family != AF_INET) {
-			struct dns_addr_buf addr_buf;
-			addr_buf.family = AF_INET6;
-
-			struct in6_addr addr = IN6ADDR_ANY_INIT;
-			memcpy(&addr_buf.addr, &addr, 16);
-
-			buf.buf.push_back(addr_buf);
-		}
-	} else {
-		if (family != AF_INET6) {
-			struct dns_addr_buf addr_buf;
-			addr_buf.family = AF_INET;
-
-			in_addr_t addr = INADDR_LOOPBACK;
-			memcpy(&addr_buf.addr, &addr, 4);
-
-			buf.buf.push_back(addr_buf);
-		}
-		if (family != AF_INET) {
-			struct dns_addr_buf addr_buf;
-			addr_buf.family = AF_INET6;
-
-			struct in6_addr addr = IN6ADDR_LOOPBACK_INIT;
-			memcpy(&addr_buf.addr, &addr, 16);
-
-			buf.buf.push_back(addr_buf);
-		}
-	}
-	return buf.buf.size();
-}
-
-int lookup_name_ip(struct lookup_result &buf, const char *name, int family) {
-	if (family == AF_INET) {
-		in_addr_t addr = 0;
-		int res = inet_pton(AF_INET, name, &addr);
-
-		if (res <= 0)
-			return -EAI_NONAME;
-
-		struct dns_addr_buf addr_buf;
-		addr_buf.family = AF_INET;
-		memcpy(&addr_buf.addr, &addr, 4);
-
-		buf.buf.push_back(addr_buf);
-		return 1;
-	}
-
-	if (family == AF_INET6) {
-		struct in6_addr addr{0};
-		int res = inet_pton(AF_INET6, name, &addr);
-
-		if (res <= 0)
-			return -EAI_NONAME;
-
-		struct dns_addr_buf addr_buf;
-		addr_buf.family = AF_INET6;
-		memcpy(&addr_buf.addr, &addr, 16);
-
-		buf.buf.push_back(addr_buf);
-		return 1;
-	}
-
-	// If no family was specified we try ipv4 and then ipv6.
-	in_addr_t addr4 = 0;
-	int res = inet_pton(AF_INET, name, &addr4);
-
-	if (res > 0) {
-		struct dns_addr_buf addr_buf;
-		addr_buf.family = AF_INET;
-		memcpy(&addr_buf.addr, &addr4, 4);
-
-		buf.buf.push_back(addr_buf);
-		return 1;
-	}
-
-	struct in6_addr addr6{0};
-	res = inet_pton(AF_INET6, name, &addr6);
-
-	if (res <= 0)
-		return -EAI_NONAME;
-
-	struct dns_addr_buf addr_buf;
-	addr_buf.family = AF_INET6;
-	memcpy(&addr_buf.addr, &addr6, 16);
-
-	buf.buf.push_back(addr_buf);
-	return 1;
-}
-
-} // namespace mlibc