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am 3773d35e: Make the DNS resolver accept domain names with an underscore.

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Merge commit '3773d35eb98e22b5edab4d82fb72bdf86ff80494'

* commit '3773d35eb98e22b5edab4d82fb72bdf86ff80494':
  Make the DNS resolver accept domain names with an underscore.
This commit is contained in:
David 'Digit' Turner 2009-07-28 15:27:33 -07:00 committed by Android Git Automerger
commit 9cfb12e6bc
1 changed files with 8 additions and 1 deletions
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9
libc/netbsd/resolv/res_comp.c
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@ -147,6 +147,12 @@ dn_skipname(const u_char *ptr, const u_char *eom) {
* tell us anything about network-format data. The rest of the BIND system
* is not careful about this, but for some reason, we're doing it right here.
*/
/* BIONIC: We also accept underscores in the middle of labels.
* This extension is needed to make resolution on some VPN networks
* work properly.
*/
#define PERIOD 0x2e
#define hyphenchar(c) ((c) == 0x2d)
#define bslashchar(c) ((c) == 0x5c)
@ -155,9 +161,10 @@ dn_skipname(const u_char *ptr, const u_char *eom) {
#define alphachar(c) (((c) >= 0x41 && (c) <= 0x5a) \
|| ((c) >= 0x61 && (c) <= 0x7a))
#define digitchar(c) ((c) >= 0x30 && (c) <= 0x39)
#define underscorechar(c) ((c) == 0x5f)
#define borderchar(c) (alphachar(c) || digitchar(c))
#define middlechar(c) (borderchar(c) || hyphenchar(c))
#define middlechar(c) (borderchar(c) || hyphenchar(c) || underscorechar(c))
#define domainchar(c) ((c) > 0x20 && (c) < 0x7f)
int