Re: lwIP not using getaddrinfo()
Gisle Vanem gva...@broadpark.no wrote: It does. Trying that, I see lwIP uses getaddrinfo(), then calls gethostbyname() internally and then hangs forever waiting for some event: ... kernel32.dll!WaitForSingleObjectEx+0xa8 I see why. lwip_init() is called from easy.c. But the main input processing loop (polling the ifaces, checking timers, taking care of retransmissions etc.) is supposed to be called from an interrupt context. That's the idea on embedded systems where that is safe to do. This main-loop is missing in libcurl. On Windows (no interrupt context) one needs to call lwIP's tcpip_init(). This should create a threaded main-loop that gets everything going. Ref. lwip-root/src/contrib/ports/win32/test.c Yang are you there? What's your idea on this, since you added the lwIP stuff? What's the motivation for calling lwip_init() only? AFAICS, this doesn't call the required WinPcap init stuff. How can we best make libcurl+lwIP support embedded and Win32 targets? --gv --- List admin: http://cool.haxx.se/list/listinfo/curl-library Etiquette: http://curl.haxx.se/mail/etiquette.html
lwIP not using getaddrinfo()
Playing with lwIP, I see libcurl (Win32/MSVC) doesn't use getaddrinfo(). Although lwIP has it. This stack-trace shows it: ... lwip.dll!sys_arch_sem_wait+0xbb lwip.dll!netconn_gethostbyname+0xb6 lwip.dll!lwip_gethostbyname_r+0x87 curl.exe!Curl_ipv4_resolve_r+0x78 curl.exe!Curl_resolver_getaddrinfo+0x6b curl.exe!Curl_resolv+0xf0 curl.exe!Curl_resolv_timeout+0x2c curl.exe!resolve_server+0x12d curl.exe!create_conn+0x4ea curl.exe!Curl_connect+0x1d curl.exe!connect_host+0x27 curl.exe!Curl_do_perform+0x42 curl.exe!Curl_perform+0x17 curl.exe!curl_easy_perform+0xa0 curl.exe!operate+0x244e curl.exe!main+0x42 ... But I cannot make sense of the messy #ifdef-ing to select the correct resolver. We have been told for like 10 years that gethostbyname() has been deprecated. At least on Windows. So someone help me fix this. --gv --- List admin: http://cool.haxx.se/list/listinfo/curl-library Etiquette: http://curl.haxx.se/mail/etiquette.html
Re: lwIP not using getaddrinfo()
On Thu, 22 Sep 2011, Gisle Vanem wrote: But I cannot make sense of the messy #ifdef-ing to select the correct resolver. We have been told for like 10 years that gethostbyname() has been deprecated. At least on Windows. So someone help me fix this. It currently depends on ENABLE_IPV6, which in lib/setup.h (line 495) will define CURLRES_IPV6 then. Does lwIP support IPv6? Otherwise I guess you can leave ENABLE_IPV6 undefined and just explicity define CURLRES_IPV6 and undefine CURLRES_IPV4, -- / daniel.haxx.se --- List admin: http://cool.haxx.se/list/listinfo/curl-library Etiquette: http://curl.haxx.se/mail/etiquette.html
Re: lwIP not using getaddrinfo()
Daniel Stenberg dan...@haxx.se wrote: On Thu, 22 Sep 2011, Gisle Vanem wrote: But I cannot make sense of the messy #ifdef-ing to select the correct resolver. We have been told for like 10 years that gethostbyname() has been deprecated. At least on Windows. So someone help me fix this. It currently depends on ENABLE_IPV6, which in lib/setup.h (line 495) will define CURLRES_IPV6 then. Does lwIP support IPv6? Otherwise I guess you can leave ENABLE_IPV6 undefined and just explicity define CURLRES_IPV6 and undefine CURLRES_IPV4, It does. Trying that, I see lwIP uses getaddrinfo(), then calls gethostbyname() internally and then hangs forever waiting for some event: ... kernel32.dll!WaitForSingleObjectEx+0xa8 kernel32.dll!WaitForSingleObject+0x12 lwip.dll!sys_arch_sem_wait+0xbb lwip.dll!netconn_gethostbyname+0xb6 lwip.dll!lwip_gethostbyname+0x11 libcurl.dll!Curl_getaddrinfo+0x43 libcurl.dll!Curl_resolv+0xd1 libcurl.dll!Curl_resolv_timeout+0x44 libcurl.dll!resolve_server+0x12d libcurl.dll!create_conn+0x4ea libcurl.dll!Curl_connect+0x1d libcurl.dll!Curl_do_perform+0x5a libcurl.dll!Curl_perform+0x17 libcurl.dll!curl_easy_perform+0xa0 curl.exe!operate+0x2468 ... Must check further. --gv --- List admin: http://cool.haxx.se/list/listinfo/curl-library Etiquette: http://curl.haxx.se/mail/etiquette.html
