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enhanced httpd's dns handling

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This commit is contained in:
hyung-hwan 2014-08-05 16:55:15 +00:00
parent ccb6ddcefd
commit 4f4f42ae4f
6 changed files with 110 additions and 31 deletions
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10
qse/include/qse/http/stdhttpd.h
View File

@ -142,12 +142,20 @@ enum qse_httpd_serverstd_opt_t
};
typedef enum qse_httpd_serverstd_opt_t qse_httpd_serverstd_opt_t;
#define QSE_HTTPD_DNSSTD_DEFAULT_TMOUT 10
#define QSE_HTTPD_DNSSTD_DEFAULT_TMOUT 3
#define QSE_HTTPD_DNSSTD_DEFAULT_RESENDS 2
#define QSE_HTTPD_DNSSTD_DEFAULT_CACHE_TTL 120
#define QSE_HTTPD_DNSSTD_DEFAULT_CACHE_NEGTTL 10
#define QSE_HTTPD_DNSSTD_DEFAULT_CACHE_MINTTL 2
struct qse_httpd_dnsstd_t
{
qse_nwad_t nwad;
qse_ntime_t tmout;
qse_uint32_t resends;
qse_uint32_t cache_ttl;
qse_uint32_t cache_minttl; /* minimum ttl */
qse_uint32_t cache_negttl; /* negative ttl */
};
typedef struct qse_httpd_dnsstd_t qse_httpd_dnsstd_t;

2
qse/lib/cmn/tmr.c
View File

@ -170,7 +170,6 @@ void qse_tmr_remove (qse_tmr_t* tmr, qse_size_t index)
QSE_ASSERT (index < tmr->size);
printf ("tmr_remove.....>>>>>>>>>>>>size=>%d index=>%d\n", (int)tmr->size, (int)index);
item = tmr->event[index];
tmr->event[index].updater (tmr, index, QSE_TMR_INVALID, tmr->event[index].ctx);
@ -187,7 +186,6 @@ qse_size_t qse_tmr_insert (qse_tmr_t* tmr, const qse_tmr_event_t* event)
{
qse_size_t index = tmr->size;
printf ("tmr_insert ......size => %d\n", (int)tmr->size);
if (index >= tmr->capa)
{
qse_tmr_event_t* tmp;

50
qse/lib/http/httpd-proxy.c
View File

@ -35,13 +35,14 @@ struct task_proxy_arg_t
typedef struct task_proxy_t task_proxy_t;
struct task_proxy_t
{
#define PROXY_INIT_FAILED (1 << 0)
#define PROXY_RAW (1 << 1)
#define PROXY_RESOL_PEER_NAME (1 << 2)
#define PROXY_UNKNOWN_PEER_NWAD (1 << 3)
#define PROXY_X_FORWARDED_FOR (1 << 4)
#define PROXY_VIA (1 << 5)
#define PROXY_VIA_RETURNING (1 << 6)
#define PROXY_INIT_FAILED (1 << 0)
#define PROXY_RAW (1 << 1)
#define PROXY_RESOLVE_PEER_NAME (1 << 2)
#define PROXY_PEER_NAME_RESOLVED (1 << 3)
#define PROXY_PEER_NAME_UNRESOLVED (1 << 4)
#define PROXY_X_FORWARDED_FOR (1 << 5)
#define PROXY_VIA (1 << 6)
#define PROXY_VIA_RETURNING (1 << 7)
int flags;
qse_httpd_t* httpd;
qse_httpd_client_t* client;
@ -907,7 +908,7 @@ static int task_init_proxy (
{
qse_mchar_t* colon;
proxy->flags |= PROXY_RESOL_PEER_NAME;
proxy->flags |= PROXY_RESOLVE_PEER_NAME;
proxy->peer_name = proxy->pseudonym + len + 1;
qse_mbscpy (proxy->peer_name, arg->rsrc->dst.str);
@ -1794,9 +1795,10 @@ static void on_peer_name_resolved (qse_httpd_t* httpd, const qse_mchar_t* name,
qse_httpd_task_t* task = (qse_httpd_task_t*)ctx;
task_proxy_t* proxy = (task_proxy_t*)task->ctx;
QSE_ASSERT (proxy->flags & PROXY_RESOL_PEER_NAME);
QSE_ASSERT (proxy->flags & PROXY_RESOLVE_PEER_NAME);
QSE_ASSERT (!(proxy->flags & (PROXY_PEER_NAME_RESOLVED | PROXY_PEER_NAME_UNRESOLVED)));
proxy->flags &= ~PROXY_RESOL_PEER_NAME;
proxy->flags &= ~PROXY_RESOLVE_PEER_NAME;
if (nwad)
{
@ -1807,11 +1809,13 @@ static void on_peer_name_resolved (qse_httpd_t* httpd, const qse_mchar_t* name,
if (proxy->peer.local.type == QSE_NWAD_NX)
proxy->peer.local.type = proxy->peer.nwad.type;
proxy->flags |= PROXY_PEER_NAME_RESOLVED;
}
else
{
/* resolution failure. */
proxy->flags |= PROXY_INIT_FAILED | PROXY_UNKNOWN_PEER_NWAD;
proxy->flags |= PROXY_INIT_FAILED | PROXY_PEER_NAME_UNRESOLVED;
}
if (qse_httpd_activatetasktrigger (httpd, proxy->client, task) <= -1)
@ -1832,13 +1836,28 @@ static int task_main_proxy (
if (proxy->flags & PROXY_INIT_FAILED)
{
if (proxy->flags & PROXY_UNKNOWN_PEER_NWAD) http_errnum = 404; /* 404 Not Found */
if (proxy->flags & PROXY_PEER_NAME_UNRESOLVED) http_errnum = 404; /* 404 Not Found */
goto oops;
}
if (proxy->flags & PROXY_RESOL_PEER_NAME)
#if 0
if (proxy->flags & PROXY_REWRITE_URL)
{
if (qse_httpd_rewriteurl (httpd, proxy->url, on_url_rewritten, task) <= -1) goto oops;
if (proxy->flags & PROXY_INIT_FAILED) goto oops;
if ((proxy->flags & PROXY_RESOL_REWRITE_URL) &&
qse_httpd_inactivatetasktrigger (httpd, client, task) <= -1) goto oops;
return 1;
}
#endif
if (proxy->flags & PROXY_RESOLVE_PEER_NAME)
{
/* arrange to resolve a host name and return */
QSE_ASSERT (proxy->peer_name != QSE_NULL);
if (qse_httpd_resolname (httpd, proxy->peer_name, on_peer_name_resolved, task) <= -1) goto oops;
@ -1848,11 +1867,12 @@ static int task_main_proxy (
* called. */
if (proxy->flags & PROXY_INIT_FAILED)
{
if (proxy->flags & PROXY_UNKNOWN_PEER_NWAD) http_errnum = 404; /* 404 Not Found */
if (proxy->flags & PROXY_PEER_NAME_UNRESOLVED) http_errnum = 404; /* 404 Not Found */
goto oops;
}
if ((proxy->flags & PROXY_RESOL_PEER_NAME) &&
/* peer name is not resolved yet. */
if (!(proxy->flags & PROXY_PEER_NAME_RESOLVED) &&
qse_httpd_inactivatetasktrigger (httpd, client, task) <= -1) goto oops;
return 1;

71
qse/lib/http/httpd-std.c
View File

@ -2113,6 +2113,7 @@ struct dns_antrail_t
struct dns_ctx_t
{
qse_httpd_t* httpd;
qse_httpd_dns_t* dns;
qse_skad_t skad;
int skadlen;
@ -2144,6 +2145,7 @@ struct dns_req_t
dns_ctx_t* dc;
qse_size_t tmr_tmout;
int resends;
dns_req_t* next;
};
@ -2267,6 +2269,7 @@ static int dns_open (qse_httpd_t* httpd, qse_httpd_dns_t* dns)
if (dc == NULL) goto oops;
dc->httpd = httpd;
dc->dns = dns;
/* TODO: add static cache entries from /etc/hosts */
@ -2506,6 +2509,7 @@ static dns_ans_t* dns_get_answer_from_cache (dns_ctx_t* dc, const qse_mchar_t* n
static int dns_recv (qse_httpd_t* httpd, qse_httpd_dns_t* dns)
{
dns_ctx_t* dc = (dns_ctx_t*)dns->ctx;
httpd_xtn_t* httpd_xtn;
qse_skad_t fromaddr;
socklen_t fromlen;
@ -2516,7 +2520,7 @@ static int dns_recv (qse_httpd_t* httpd, qse_httpd_dns_t* dns)
printf ("DNS_RECV....\n");
/* TODO: delete requests that're not replied at all for long time */
httpd_xtn = qse_httpd_getxtn (httpd);
fromlen = QSE_SIZEOF(fromaddr);
len = recvfrom (dns->handle.i, buf, QSE_SIZEOF(buf), 0, (struct sockaddr*)&fromaddr, &fromlen);
@ -2534,7 +2538,6 @@ printf ("DNS_RECV....\n");
xid = (id >= QSE_COUNTOF(dc->reqs))? (id - QSE_COUNTOF(dc->reqs)): id;
printf ("%d qdcount %d ancount %d\n", id, qdcount, ancount);
if (xid >= 0 && xid < QSE_COUNTOF(dc->reqs) && hdr->qr && hdr->opcode == DNS_OPCODE_QUERY && qdcount >= 1)
{
qse_uint8_t* plptr = (qse_uint8_t*)(hdr + 1);
@ -2622,6 +2625,8 @@ printf ("invoking resoll with ipv6 \n");
if (nwad.type != QSE_NWAD_NX)
{
int ttl;
dns_remove_tmr_tmout (req);
req->resol (httpd, req->name, &nwad, req->ctx);
@ -2630,7 +2635,10 @@ printf ("invoking resoll with ipv6 \n");
else dc->reqs[xid] = req->next;
/*qse_httpd_freemem (httpd, req);*/
dns_cache_answer (dc, req, &nwad, qse_ntoh32(antrail->ttl));
ttl = httpd_xtn->dns.cache_ttl;
if (ttl > qse_ntoh32(antrail->ttl)) ttl = qse_ntoh32(antrail->ttl);
if (ttl < httpd_xtn->dns.cache_minttl) ttl = httpd_xtn->dns.cache_minttl;
dns_cache_answer (dc, req, &nwad, ttl);
goto done;
}
@ -2656,7 +2664,7 @@ printf ("invoking resoll with ipv6 \n");
else dc->reqs[xid] = req->next;
/*qse_httpd_freemem (httpd, req);*/
dns_cache_answer (dc, req, QSE_NULL, DNS_MIN_TTL);
dns_cache_answer (dc, req, QSE_NULL, httpd_xtn->dns.cache_negttl);
}
}
}
@ -2677,10 +2685,44 @@ printf (">>tmr_dns_tmout_updated %d %d\n", (int)req->tmr_tmout, (int)old_index);
static void tmr_dns_tmout_handle (qse_tmr_t* tmr, const qse_ntime_t* now, void* ctx)
{
/* destory the unanswered request if timed out */
dns_req_t* req = (dns_req_t*)ctx;
dns_req_t* preq, * xreq;
qse_uint16_t xid;
/* when this handler is called, the event should be removed from the timer */
QSE_ASSERT (req->tmr_tmout == QSE_TMR_INVALID);
/* TODO: resend?? + reschedule?? */
if (req->resends > 0)
{
httpd_xtn_t* httpd_xtn;
qse_tmr_event_t tmout_event;
httpd_xtn = qse_httpd_getxtn (req->dc->httpd);
qse_gettime (&tmout_event.when);
qse_addtime (&tmout_event.when, &httpd_xtn->dns.tmout, &tmout_event.when);
tmout_event.ctx = req;
tmout_event.handler = tmr_dns_tmout_handle;
tmout_event.updater = tmr_dns_tmout_updated;
if ((!(req->flags & DNS_REQ_A_NX) && req->qalen > 0 && sendto (req->dc->dns->handle.i, req->qa, req->qalen, 0, (struct sockaddr*)&req->dc->skad, req->dc->skadlen) != req->qalen) ||
(!(req->flags & DNS_REQ_AAAA_NX) && req->qaaaalen > 0 && sendto (req->dc->dns->handle.i, req->qaaaa, req->qaaaalen, 0, (struct sockaddr*)&req->dc->skad, req->dc->skadlen) != req->qaaaalen))
{
/* error. fall thru */
}
else
{
req->tmr_tmout = qse_tmr_insert (req->dc->httpd->tmr, &tmout_event);
if (req->tmr_tmout != QSE_TMR_INVALID)
{
req->resends--;
return; /* resend ok */
}
}
}
printf ("dns timed out....\n");
xid = req->seqa;
QSE_ASSERT (xid >= 0 && QSE_COUNTOF(req->dc->reqs));
@ -2690,32 +2732,32 @@ printf ("dns timed out....\n");
if (req == xreq) break;
}
/* this request that timed out must be inside the request list */
QSE_ASSERT (req == xreq);
/* detach the request off dc->reqs */
if (preq) preq->next = req->next;
else req->dc->reqs[xid] = req->next;
QSE_ASSERT (req->tmr_tmout == QSE_TMR_INVALID);
/* dns timed out. report that name resolution failed */
req->resol (req->dc->httpd, req->name, QSE_NULL, req->ctx);
/* i don't cache the items that have timed out */
qse_httpd_freemem (req->dc->httpd, req);
}
static int dns_send (qse_httpd_t* httpd, qse_httpd_dns_t* dns, const qse_mchar_t* name, qse_httpd_resol_t resol, void* ctx)
{
dns_ctx_t* dc = (dns_ctx_t*)dns->ctx;
httpd_xtn_t* httpd_xtn = qse_httpd_getxtn (httpd);
httpd_xtn_t* httpd_xtn;
qse_uint32_t seq;
dns_req_t* req;
qse_size_t name_len;
dns_ans_t* ans;
qse_tmr_event_t tmout_event;
httpd_xtn = qse_httpd_getxtn (httpd);
printf ("DNS REALLY SENING>>>>>>>>>>>>>>>>>>>>>>>\n");
ans = dns_get_answer_from_cache (dc, name);
@ -2775,8 +2817,7 @@ printf ("DNS REALLY SENING>>>>>>>>>>>>>>>>>>>>>>>\n");
tmout_event.ctx = req;
tmout_event.handler = tmr_dns_tmout_handle;
tmout_event.updater = tmr_dns_tmout_updated;
printf ("ABOUT TO REGISTER TMR_TMOUT...\n");
req->tmr_tmout = qse_tmr_insert (httpd->tmr, &tmout_event);
if (req->tmr_tmout == QSE_TMR_INVALID)
{
@ -2784,7 +2825,7 @@ printf ("ABOUT TO REGISTER TMR_TMOUT...\n");
qse_httpd_freemem (httpd, req);
return -1;
}
printf ("???? initial tmr_tmout => %d\n", (int)req->tmr_tmout);
req->resends = httpd_xtn->dns.resends;
if ((req->qalen > 0 && sendto (dns->handle.i, req->qa, req->qalen, 0, (struct sockaddr*)&dc->skad, dc->skadlen) != req->qalen) ||
(req->qaaaalen > 0 && sendto (dns->handle.i, req->qaaaa, req->qaaaalen, 0, (struct sockaddr*)&dc->skad, dc->skadlen) != req->qaaaalen))
@ -2837,7 +2878,6 @@ static int process_request (
* non-peek mode as well */
if (peek) qse_perdechttpstr (qse_htre_getqpath(req), qse_htre_getqpath(req));
if (peek && (httpd->opt.trait & QSE_HTTPD_LOGACT))
{
/* TODO: improve logging */
@ -4070,6 +4110,11 @@ int qse_httpd_loopstd (qse_httpd_t* httpd, const qse_httpd_dnsstd_t* dns)
{
httpd_xtn->dns.nwad.type = QSE_NWAD_NX;
httpd_xtn->dns.tmout.sec = QSE_HTTPD_DNSSTD_DEFAULT_TMOUT;
httpd_xtn->dns.tmout.nsec = 0;
httpd_xtn->dns.resends = QSE_HTTPD_DNSSTD_DEFAULT_RESENDS;
httpd_xtn->dns.cache_ttl = QSE_HTTPD_DNSSTD_DEFAULT_CACHE_TTL;
httpd_xtn->dns.cache_minttl = QSE_HTTPD_DNSSTD_DEFAULT_CACHE_MINTTL;
httpd_xtn->dns.cache_negttl = QSE_HTTPD_DNSSTD_DEFAULT_CACHE_NEGTTL;
}
return qse_httpd_loop (httpd);

1
qse/lib/http/httpd-task.c
View File

@ -185,6 +185,7 @@ static qse_httpd_task_t* entask_status (
switch (code)
{
case 301:
case 302:
case 307:
{
status_reloc_t* reloc;

7
qse/lib/http/httpd.c
View File

@ -1681,6 +1681,13 @@ printf ("DNS_SEND.........................\n");
return httpd->opt.scb.dns.send (httpd, &httpd->dns, name, resol, ctx);
}
#if 0
int qse_httpd_rewriteurl (qse_httpd_t* httpd, const qse_mchar_t* url, qse_httpd_rewrite_t rewrite, void* ctx)
{
return httpd->opt.scb.url.send (httpd, &httpd->dns, name, resol, ctx);
}
#endif
int qse_httpd_activatetasktrigger (qse_httpd_t* httpd, qse_httpd_client_t* client, qse_httpd_task_t* task)
{
int x, org_cmask;