diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/basic/string-util.c | 23 | ||||
| -rw-r--r-- | src/basic/string-util.h | 4 | ||||
| -rw-r--r-- | src/resolve/resolved-dns-dnssec.c | 8 | ||||
| -rw-r--r-- | src/resolve/resolved-dns-packet.c | 8 | ||||
| -rw-r--r-- | src/shared/dns-domain.c | 18 |
5 files changed, 32 insertions, 29 deletions
diff --git a/src/basic/string-util.c b/src/basic/string-util.c index 8178c7093f..849e457439 100644 --- a/src/basic/string-util.c +++ b/src/basic/string-util.c @@ -317,14 +317,33 @@ char *truncate_nl(char *s) { return s; } +char ascii_tolower(char x) { + + if (x >= 'A' && x <= 'Z') + return x - 'A' + 'a'; + + return x; +} + char *ascii_strlower(char *t) { char *p; assert(t); for (p = t; *p; p++) - if (*p >= 'A' && *p <= 'Z') - *p = *p - 'A' + 'a'; + *p = ascii_tolower(*p); + + return t; +} + +char *ascii_strlower_n(char *t, size_t n) { + size_t i; + + if (n <= 0) + return t; + + for (i = 0; i < n; i++) + t[i] = ascii_tolower(t[i]); return t; } diff --git a/src/basic/string-util.h b/src/basic/string-util.h index b59b9b5a71..1ac6bcd6f8 100644 --- a/src/basic/string-util.h +++ b/src/basic/string-util.h @@ -130,7 +130,9 @@ char *strstrip(char *s); char *delete_chars(char *s, const char *bad); char *truncate_nl(char *s); -char *ascii_strlower(char *path); +char ascii_tolower(char x); +char *ascii_strlower(char *s); +char *ascii_strlower_n(char *s, size_t n); bool chars_intersect(const char *a, const char *b) _pure_; diff --git a/src/resolve/resolved-dns-dnssec.c b/src/resolve/resolved-dns-dnssec.c index e71939d999..d5eda6a6dd 100644 --- a/src/resolve/resolved-dns-dnssec.c +++ b/src/resolve/resolved-dns-dnssec.c @@ -890,8 +890,6 @@ int dnssec_canonicalize(const char *n, char *buffer, size_t buffer_max) { return -ENOBUFS; for (;;) { - size_t i; - r = dns_label_unescape(&n, buffer, buffer_max); if (r < 0) return r; @@ -918,11 +916,7 @@ int dnssec_canonicalize(const char *n, char *buffer, size_t buffer_max) { if (memchr(buffer, '.', r)) return -EINVAL; - for (i = 0; i < (size_t) r; i ++) { - if (buffer[i] >= 'A' && buffer[i] <= 'Z') - buffer[i] = buffer[i] - 'A' + 'a'; - } - + ascii_strlower_n(buffer, (size_t) r); buffer[r] = '.'; buffer += r + 1; diff --git a/src/resolve/resolved-dns-packet.c b/src/resolve/resolved-dns-packet.c index 8a360a29fb..a8a8632491 100644 --- a/src/resolve/resolved-dns-packet.c +++ b/src/resolve/resolved-dns-packet.c @@ -466,12 +466,8 @@ int dns_packet_append_label(DnsPacket *p, const char *d, size_t l, bool canonica /* Generate in canonical form, as defined by DNSSEC * RFC 4034, Section 6.2, i.e. all lower-case. */ - for (i = 0; i < l; i++) { - if (d[i] >= 'A' && d[i] <= 'Z') - w[i] = (uint8_t) (d[i] - 'A' + 'a'); - else - w[i] = (uint8_t) d[i]; - } + for (i = 0; i < l; i++) + w[i] = (uint8_t) ascii_tolower(d[i]); } else /* Otherwise, just copy the string unaltered. This is * essential for DNS-SD, where the casing of labels diff --git a/src/shared/dns-domain.c b/src/shared/dns-domain.c index 68404ca9e5..3848a0518d 100644 --- a/src/shared/dns-domain.c +++ b/src/shared/dns-domain.c @@ -913,19 +913,11 @@ int dns_name_to_wire_format(const char *domain, uint8_t *buffer, size_t len, boo if (r < 0) return r; - if (canonical) { - size_t i; - - /* Optionally, output the name in DNSSEC - * canonical format, as described in RFC 4034, - * section 6.2. Or in other words: in - * lower-case. */ - - for (i = 0; i < (size_t) r; i++) { - if (out[i] >= 'A' && out[i] <= 'Z') - out[i] = out[i] - 'A' + 'a'; - } - } + /* Optionally, output the name in DNSSEC canonical + * format, as described in RFC 4034, section 6.2. Or + * in other words: in lower-case. */ + if (canonical) + ascii_strlower_n((char*) out, (size_t) r); /* Fill label length, move forward */ *label_length = r; |