resolve: move dns routines into shared

1 files changed, 0 insertions, 613 deletions

diff --git a/src/resolve/resolved-dns-domain.c b/src/resolve/resolved-dns-domain.c
deleted file mode 100644
index e1eb3ddfe5..0000000000
--- a/src/resolve/resolved-dns-domain.c
+++ /dev/null
@@ -1,613 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2014 Lennart Poettering
-
-  systemd 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.
-
-  systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
- ***/
-
-#ifdef HAVE_LIBIDN
-#include <idna.h>
-#include <stringprep.h>
-#endif
-
-#include "resolved-dns-domain.h"
-
-int dns_label_unescape(const char **name, char *dest, size_t sz) {
-        const char *n;
-        char *d;
-        int r = 0;
-
-        assert(name);
-        assert(*name);
-        assert(dest);
-
-        n = *name;
-        d = dest;
-
-        for (;;) {
-                if (*n == '.') {
-                        n++;
-                        break;
-                }
-
-                if (*n == 0)
-                        break;
-
-                if (sz <= 0)
-                        return -ENOSPC;
-
-                if (r >= DNS_LABEL_MAX)
-                        return -EINVAL;
-
-                if (*n == '\\') {
-                        /* Escaped character */
-
-                        n++;
-
-                        if (*n == 0)
-                                /* Ending NUL */
-                                return -EINVAL;
-
-                        else if (*n == '\\' || *n == '.') {
-                                /* Escaped backslash or dot */
-                                *(d++) = *(n++);
-                                sz--;
-                                r++;
-
-                        } else if (n[0] >= '0' && n[0] <= '9') {
-                                unsigned k;
-
-                                /* Escaped literal ASCII character */
-
-                                if (!(n[1] >= '0' && n[1] <= '9') ||
-                                    !(n[2] >= '0' && n[2] <= '9'))
-                                        return -EINVAL;
-
-                                k = ((unsigned) (n[0] - '0') * 100) +
-                                        ((unsigned) (n[1] - '0') * 10) +
-                                        ((unsigned) (n[2] - '0'));
-
-                                /* Don't allow CC characters or anything that doesn't fit in 8bit */
-                                if (k < ' ' || k > 255 || k == 127)
-                                        return -EINVAL;
-
-                                *(d++) = (char) k;
-                                sz--;
-                                r++;
-
-                                n += 3;
-                        } else
-                                return -EINVAL;
-
-                } else if ((uint8_t) *n >= (uint8_t) ' ' && *n != 127) {
-
-                        /* Normal character */
-                        *(d++) = *(n++);
-                        sz--;
-                        r++;
-                } else
-                        return -EINVAL;
-        }
-
-        /* Empty label that is not at the end? */
-        if (r == 0 && *n)
-                return -EINVAL;
-
-        if (sz >= 1)
-                *d = 0;
-
-        *name = n;
-        return r;
-}
-
-int dns_label_escape(const char *p, size_t l, char **ret) {
-        _cleanup_free_ char *s = NULL;
-        char *q;
-        int r;
-
-        assert(p);
-        assert(ret);
-
-        if (l > DNS_LABEL_MAX)
-                return -EINVAL;
-
-        s = malloc(l * 4 + 1);
-        if (!s)
-                return -ENOMEM;
-
-        q = s;
-        while (l > 0) {
-
-                if (*p == '.' || *p == '\\') {
-
-                        /* Dot or backslash */
-                        *(q++) = '\\';
-                        *(q++) = *p;
-
-                } else if (*p == '_' ||
-                           *p == '-' ||
-                           (*p >= '0' && *p <= '9') ||
-                           (*p >= 'a' && *p <= 'z') ||
-                           (*p >= 'A' && *p <= 'Z')) {
-
-                        /* Proper character */
-                        *(q++) = *p;
-                } else if ((uint8_t) *p >= (uint8_t) ' ' && *p != 127) {
-
-                        /* Everything else */
-                        *(q++) = '\\';
-                        *(q++) = '0' + (char) ((uint8_t) *p / 100);
-                        *(q++) = '0' + (char) (((uint8_t) *p / 10) % 10);
-                        *(q++) = '0' + (char) ((uint8_t) *p % 10);
-
-                } else
-                        return -EINVAL;
-
-                p++;
-                l--;
-        }
-
-        *q = 0;
-        *ret = s;
-        r = q - s;
-        s = NULL;
-
-        return r;
-}
-
-int dns_label_apply_idna(const char *encoded, size_t encoded_size, char *decoded, size_t decoded_max) {
-#ifdef HAVE_LIBIDN
-        _cleanup_free_ uint32_t *input = NULL;
-        size_t input_size;
-        const char *p;
-        bool contains_8bit = false;
-
-        assert(encoded);
-        assert(decoded);
-        assert(decoded_max >= DNS_LABEL_MAX);
-
-        if (encoded_size <= 0)
-                return 0;
-
-        for (p = encoded; p < encoded + encoded_size; p++)
-                if ((uint8_t) *p > 127)
-                        contains_8bit = true;
-
-        if (!contains_8bit)
-                return 0;
-
-        input = stringprep_utf8_to_ucs4(encoded, encoded_size, &input_size);
-        if (!input)
-                return -ENOMEM;
-
-        if (idna_to_ascii_4i(input, input_size, decoded, 0) != 0)
-                return -EINVAL;
-
-        return strlen(decoded);
-#else
-        return 0;
-#endif
-}
-
-int dns_label_undo_idna(const char *encoded, size_t encoded_size, char *decoded, size_t decoded_max) {
-#ifdef HAVE_LIBIDN
-        size_t input_size, output_size;
-        _cleanup_free_ uint32_t *input = NULL;
-        _cleanup_free_ char *result = NULL;
-        uint32_t *output = NULL;
-        size_t w;
-
-        /* To be invoked after unescaping */
-
-        assert(encoded);
-        assert(decoded);
-
-        if (encoded_size < sizeof(IDNA_ACE_PREFIX)-1)
-                return 0;
-
-        if (memcmp(encoded, IDNA_ACE_PREFIX, sizeof(IDNA_ACE_PREFIX) -1) != 0)
-                return 0;
-
-        input = stringprep_utf8_to_ucs4(encoded, encoded_size, &input_size);
-        if (!input)
-                return -ENOMEM;
-
-        output_size = input_size;
-        output = newa(uint32_t, output_size);
-
-        idna_to_unicode_44i(input, input_size, output, &output_size, 0);
-
-        result = stringprep_ucs4_to_utf8(output, output_size, NULL, &w);
-        if (!result)
-                return -ENOMEM;
-        if (w <= 0)
-                return 0;
-        if (w+1 > decoded_max)
-                return -EINVAL;
-
-        memcpy(decoded, result, w+1);
-        return w;
-#else
-        return 0;
-#endif
-}
-
-int dns_name_normalize(const char *s, char **_ret) {
-        _cleanup_free_ char *ret = NULL;
-        size_t n = 0, allocated = 0;
-        const char *p = s;
-        bool first = true;
-        int r;
-
-        assert(s);
-
-        for (;;) {
-                _cleanup_free_ char *t = NULL;
-                char label[DNS_LABEL_MAX];
-                int k;
-
-                r = dns_label_unescape(&p, label, sizeof(label));
-                if (r < 0)
-                        return r;
-                if (r == 0) {
-                        if (*p != 0)
-                                return -EINVAL;
-                        break;
-                }
-
-                k = dns_label_undo_idna(label, r, label, sizeof(label));
-                if (k < 0)
-                        return k;
-                if (k > 0)
-                        r = k;
-
-                r = dns_label_escape(label, r, &t);
-                if (r < 0)
-                        return r;
-
-                if (!GREEDY_REALLOC(ret, allocated, n + !first + strlen(t) + 1))
-                        return -ENOMEM;
-
-                if (!first)
-                        ret[n++] = '.';
-                else
-                        first = false;
-
-                memcpy(ret + n, t, r);
-                n += r;
-        }
-
-        if (n > DNS_NAME_MAX)
-                return -EINVAL;
-
-        if (!GREEDY_REALLOC(ret, allocated, n + 1))
-                return -ENOMEM;
-
-        ret[n] = 0;
-
-        if (_ret) {
-                *_ret = ret;
-                ret = NULL;
-        }
-
-        return 0;
-}
-
-unsigned long dns_name_hash_func(const void *s, const uint8_t hash_key[HASH_KEY_SIZE]) {
-        const char *p = s;
-        unsigned long ul = hash_key[0];
-        int r;
-
-        assert(p);
-
-        while (*p) {
-                char label[DNS_LABEL_MAX+1];
-                int k;
-
-                r = dns_label_unescape(&p, label, sizeof(label));
-                if (r < 0)
-                        break;
-
-                k = dns_label_undo_idna(label, r, label, sizeof(label));
-                if (k < 0)
-                        break;
-                if (k > 0)
-                        r = k;
-
-                label[r] = 0;
-                ascii_strlower(label);
-
-                ul = ul * hash_key[1] + ul + string_hash_func(label, hash_key);
-        }
-
-        return ul;
-}
-
-int dns_name_compare_func(const void *a, const void *b) {
-        const char *x = a, *y = b;
-        int r, q, k, w;
-
-        assert(a);
-        assert(b);
-
-        for (;;) {
-                char la[DNS_LABEL_MAX+1], lb[DNS_LABEL_MAX+1];
-
-                if (*x == 0 && *y == 0)
-                        return 0;
-
-                r = dns_label_unescape(&x, la, sizeof(la));
-                q = dns_label_unescape(&y, lb, sizeof(lb));
-                if (r < 0 || q < 0)
-                        return r - q;
-
-                k = dns_label_undo_idna(la, r, la, sizeof(la));
-                w = dns_label_undo_idna(lb, q, lb, sizeof(lb));
-                if (k < 0 || w < 0)
-                        return k - w;
-                if (k > 0)
-                        r = k;
-                if (w > 0)
-                        r = w;
-
-                la[r] = lb[q] = 0;
-                r = strcasecmp(la, lb);
-                if (r != 0)
-                        return r;
-        }
-}
-
-const struct hash_ops dns_name_hash_ops = {
-        .hash = dns_name_hash_func,
-        .compare = dns_name_compare_func
-};
-
-int dns_name_equal(const char *x, const char *y) {
-        int r, q, k, w;
-
-        assert(x);
-        assert(y);
-
-        for (;;) {
-                char la[DNS_LABEL_MAX+1], lb[DNS_LABEL_MAX+1];
-
-                if (*x == 0 && *y == 0)
-                        return true;
-
-                r = dns_label_unescape(&x, la, sizeof(la));
-                if (r < 0)
-                        return r;
-
-                k = dns_label_undo_idna(la, r, la, sizeof(la));
-                if (k < 0)
-                        return k;
-                if (k > 0)
-                        r = k;
-
-                q = dns_label_unescape(&y, lb, sizeof(lb));
-                if (q < 0)
-                        return q;
-                w = dns_label_undo_idna(lb, q, lb, sizeof(lb));
-                if (w < 0)
-                        return w;
-                if (w > 0)
-                        q = w;
-
-                la[r] = lb[q] = 0;
-                if (strcasecmp(la, lb))
-                        return false;
-        }
-}
-
-int dns_name_endswith(const char *name, const char *suffix) {
-        const char *n, *s, *saved_n = NULL;
-        int r, q, k, w;
-
-        assert(name);
-        assert(suffix);
-
-        n = name;
-        s = suffix;
-
-        for (;;) {
-                char ln[DNS_LABEL_MAX+1], ls[DNS_LABEL_MAX+1];
-
-                r = dns_label_unescape(&n, ln, sizeof(ln));
-                if (r < 0)
-                        return r;
-                k = dns_label_undo_idna(ln, r, ln, sizeof(ln));
-                if (k < 0)
-                        return k;
-                if (k > 0)
-                        r = k;
-
-                if (!saved_n)
-                        saved_n = n;
-
-                q = dns_label_unescape(&s, ls, sizeof(ls));
-                if (q < 0)
-                        return q;
-                w = dns_label_undo_idna(ls, q, ls, sizeof(ls));
-                if (w < 0)
-                        return w;
-                if (w > 0)
-                        q = w;
-
-                if (r == 0 && q == 0)
-                        return true;
-                if (r == 0 && saved_n == n)
-                        return false;
-
-                ln[r] = ls[q] = 0;
-
-                if (r != q || strcasecmp(ln, ls)) {
-
-                        /* Not the same, let's jump back, and try with the next label again */
-                        s = suffix;
-                        n = saved_n;
-                        saved_n = NULL;
-                }
-        }
-}
-
-int dns_name_reverse(int family, const union in_addr_union *a, char **ret) {
-        const uint8_t *p;
-        int r;
-
-        assert(a);
-        assert(ret);
-
-        p = (const uint8_t*) a;
-
-        if (family == AF_INET)
-                r = asprintf(ret, "%u.%u.%u.%u.in-addr.arpa", p[3], p[2], p[1], p[0]);
-        else if (family == AF_INET6)
-                r = asprintf(ret, "%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.%c.ip6.arpa",
-                             hexchar(p[15] & 0xF), hexchar(p[15] >> 4), hexchar(p[14] & 0xF), hexchar(p[14] >> 4),
-                             hexchar(p[13] & 0xF), hexchar(p[13] >> 4), hexchar(p[12] & 0xF), hexchar(p[12] >> 4),
-                             hexchar(p[11] & 0xF), hexchar(p[11] >> 4), hexchar(p[10] & 0xF), hexchar(p[10] >> 4),
-                             hexchar(p[ 9] & 0xF), hexchar(p[ 9] >> 4), hexchar(p[ 8] & 0xF), hexchar(p[ 8] >> 4),
-                             hexchar(p[ 7] & 0xF), hexchar(p[ 7] >> 4), hexchar(p[ 6] & 0xF), hexchar(p[ 6] >> 4),
-                             hexchar(p[ 5] & 0xF), hexchar(p[ 5] >> 4), hexchar(p[ 4] & 0xF), hexchar(p[ 4] >> 4),
-                             hexchar(p[ 3] & 0xF), hexchar(p[ 3] >> 4), hexchar(p[ 2] & 0xF), hexchar(p[ 2] >> 4),
-                             hexchar(p[ 1] & 0xF), hexchar(p[ 1] >> 4), hexchar(p[ 0] & 0xF), hexchar(p[ 0] >> 4));
-        else
-                return -EAFNOSUPPORT;
-        if (r < 0)
-                return -ENOMEM;
-
-        return 0;
-}
-
-int dns_name_address(const char *p, int *family, union in_addr_union *address) {
-        int r;
-
-        assert(p);
-        assert(family);
-        assert(address);
-
-        r = dns_name_endswith(p, "in-addr.arpa");
-        if (r < 0)
-                return r;
-        if (r > 0) {
-                uint8_t a[4];
-                unsigned i;
-
-                for (i = 0; i < ELEMENTSOF(a); i++) {
-                        char label[DNS_LABEL_MAX+1];
-
-                        r = dns_label_unescape(&p, label, sizeof(label));
-                        if (r < 0)
-                                return r;
-                        if (r == 0)
-                                return -EINVAL;
-                        if (r > 3)
-                                return -EINVAL;
-
-                        r = safe_atou8(label, &a[i]);
-                        if (r < 0)
-                                return r;
-                }
-
-                r = dns_name_equal(p, "in-addr.arpa");
-                if (r <= 0)
-                        return r;
-
-                *family = AF_INET;
-                address->in.s_addr = htobe32(((uint32_t) a[3] << 24) |
-                                             ((uint32_t) a[2] << 16) |
-                                             ((uint32_t) a[1] << 8) |
-                                              (uint32_t) a[0]);
-
-                return 1;
-        }
-
-        r = dns_name_endswith(p, "ip6.arpa");
-        if (r < 0)
-                return r;
-        if (r > 0) {
-                struct in6_addr a;
-                unsigned i;
-
-                for (i = 0; i < ELEMENTSOF(a.s6_addr); i++) {
-                        char label[DNS_LABEL_MAX+1];
-                        int x, y;
-
-                        r = dns_label_unescape(&p, label, sizeof(label));
-                        if (r <= 0)
-                                return r;
-                        if (r != 1)
-                                return -EINVAL;
-                        x = unhexchar(label[0]);
-                        if (x < 0)
-                                return -EINVAL;
-
-                        r = dns_label_unescape(&p, label, sizeof(label));
-                        if (r <= 0)
-                                return r;
-                        if (r != 1)
-                                return -EINVAL;
-                        y = unhexchar(label[0]);
-                        if (y < 0)
-                                return -EINVAL;
-
-                        a.s6_addr[ELEMENTSOF(a.s6_addr) - i - 1] = (uint8_t) y << 4 | (uint8_t) x;
-                }
-
-                r = dns_name_equal(p, "ip6.arpa");
-                if (r <= 0)
-                        return r;
-
-                *family = AF_INET6;
-                address->in6 = a;
-                return 1;
-        }
-
-        return 0;
-}
-
-int dns_name_root(const char *name) {
-        char label[DNS_LABEL_MAX+1];
-        int r;
-
-        assert(name);
-
-        r = dns_label_unescape(&name, label, sizeof(label));
-        if (r < 0)
-                return r;
-
-        return r == 0 && *name == 0;
-}
-
-int dns_name_single_label(const char *name) {
-        char label[DNS_LABEL_MAX+1];
-        int r;
-
-        assert(name);
-
-        r = dns_label_unescape(&name, label, sizeof(label));
-        if (r < 0)
-                return r;
-        if (r == 0)
-                return 0;
-
-        r = dns_label_unescape(&name, label, sizeof(label));
-        if (r < 0)
-                return r;
-
-        return r == 0 && *name == 0;
-}