diff options
| author | Lennart Poettering <lennart@poettering.net> | 2015-11-25 21:56:48 +0100 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2015-11-25 22:00:07 +0100 |
| commit | 422baca0f230913158078fddf884e06c8c64a316 (patch) | |
| tree | f43086c3de4206488dbc7f8accaad9c629da93ca /src/libsystemd-network/dhcp6-option.c | |
| parent | 7e8131e9c6c150732503899a092206578fdc13de (diff) | |
dns-domain: rework dns_label_escape() to not imply memory allocation
The new dns_label_escape() call now operates on a buffer passed in,
similar to dns_label_unescape(). This should make decoding a bit faster,
and nicer.
Diffstat (limited to 'src/libsystemd-network/dhcp6-option.c')
| -rw-r--r-- | src/libsystemd-network/dhcp6-option.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/src/libsystemd-network/dhcp6-option.c b/src/libsystemd-network/dhcp6-option.c index 62023a9e49..850212aea1 100644 --- a/src/libsystemd-network/dhcp6-option.c +++ b/src/libsystemd-network/dhcp6-option.c @@ -360,7 +360,6 @@ int dhcp6_option_parse_domainname(const uint8_t *optval, uint16_t optlen, char * /* End of name */ break; else if (c <= 63) { - _cleanup_free_ char *t = NULL; const char *label; /* Literal label */ @@ -369,21 +368,20 @@ int dhcp6_option_parse_domainname(const uint8_t *optval, uint16_t optlen, char * if (pos > optlen) return -EMSGSIZE; - r = dns_label_escape(label, c, &t); - if (r < 0) - goto fail; - - if (!GREEDY_REALLOC0(ret, allocated, n + !first + strlen(t) + 1)) { + if (!GREEDY_REALLOC(ret, allocated, n + !first + DNS_LABEL_ESCAPED_MAX)) { r = -ENOMEM; goto fail; } - if (!first) - ret[n++] = '.'; - else + if (first) first = false; + else + ret[n++] = '.'; + + r = dns_label_escape(label, c, ret + n, DNS_LABEL_ESCAPED_MAX); + if (r < 0) + goto fail; - memcpy(ret + n, t, r); n += r; continue; } else { |