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* disallow blank strings as service or host nameRich Felker2011-04-201-0/+3
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* fix bugs in ipv4 parsingRich Felker2011-04-201-1/+2
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* dns lookups: protect against cancellation and fix incorrect error codesRich Felker2011-04-181-4/+10
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* overhaul pthread cancellationRich Felker2011-04-176-28/+6
| | | | | | | | | | | | | | | | | | | | | | this patch improves the correctness, simplicity, and size of cancellation-related code. modulo any small errors, it should now be completely conformant, safe, and resource-leak free. the notion of entering and exiting cancellation-point context has been completely eliminated and replaced with alternative syscall assembly code for cancellable syscalls. the assembly is responsible for setting up execution context information (stack pointer and address of the syscall instruction) which the cancellation signal handler can use to determine whether the interrupted code was in a cancellable state. these changes eliminate race conditions in the previous generation of cancellation handling code (whereby a cancellation request received just prior to the syscall would not be processed, leaving the syscall to block, potentially indefinitely), and remedy an issue where non-cancellable syscalls made from signal handlers became cancellable if the signal handler interrupted a cancellation point. x86_64 asm is untested and may need a second try to get it right.
* optimize ntohl etc. in terms of bswap functionsRich Felker2011-04-124-20/+12
| | | | | | | we can do this without violating the namespace now that they are macros/inline functions rather than extern functions. the motivation is that gcc was generating giant, slow, horrible code for the old functions, and now generates a single byte-swapping instruction.
* workaround broken msghdr struct on 64bit linuxRich Felker2011-04-082-0/+21
| | | | | | | | | | | POSIX clearly specifies the type of msg_iovlen and msg_controllen, and Linux ignores it and makes them both size_t instead. to work around this we add padding (instead of just using the wrong types like glibc does), but we also need to patch-up the struct before passing it to the kernel in case the caller did not zero-fill it. if i could trust the kernel to just ignore the upper 32 bits, this would not be necessary, but i don't think it will ignore them...
* fix ipv6 address printing: 2001 appeared as 201, etc.Rich Felker2011-04-081-3/+5
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* fix broken dns response parsing code that made most ipv6 lookups failRich Felker2011-04-081-4/+6
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* return the requested string as the "canonical name" for numeric addressesRich Felker2011-04-081-0/+1
| | | | | | | | previously NULL was returned in ai_canonname, resulting in crashes in some callers. this behavior was incorrect. note however that the new behavior differs from glibc, which performs reverse dns lookups. POSIX is very clear that a reverse DNS lookup must not be performed for numeric addresses.
* fix uninitialized variables in dns lookup codeRich Felker2011-04-071-2/+2
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* add _res (__res_state()) dummyRich Felker2011-04-061-0/+9
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* implement if_indextoname and if_nametoindex functionsRich Felker2011-04-052-0/+36
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* fix all implicit conversion between signed/unsigned pointersRich Felker2011-03-251-1/+1
| | | | | | | sadly the C language does not specify any such implicit conversion, so this is not a matter of just fixing warnings (as gcc treats it) but actual errors. i would like to revisit a number of these changes and possibly revise the types used to reduce the number of casts required.
* cleanup socketcall syscall interface to ease porting to sane(r) archsRich Felker2011-02-1519-94/+17
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* another pointer signedness fixRich Felker2011-02-141-1/+1
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* initial check-in, version 0.5.0 v0.5.0Rich Felker2011-02-1255-0/+1570