/*
* singleipconnect()
*
* Note that even on connect fail it returns CURLE_OK, but with 'sock' set to
* CURL_SOCKET_BAD. Other errors will however return proper errors.
*
* singleipconnect() connects to the given IP only, and it may return without
* having connected.
*/
static CURLcode
singleipconnect(struct connectdata *conn,
const Curl_addrinfo *ai,
curl_socket_t *sockp)
{
struct Curl_sockaddr_ex addr;
int rc;
int error = 0;
bool isconnected = FALSE;
struct SessionHandle *data = conn->data;
curl_socket_t sockfd;
CURLcode res = CURLE_OK;
char ipaddress[MAX_IPADR_LEN];
long port;
*sockp = CURL_SOCKET_BAD;
res = Curl_socket(conn, ai, &addr, &sockfd);
if(res)
/* Failed to create the socket, but still return OK since we signal the
lack of socket as well. This allows the parent function to keep looping
over alternative addresses/socket families etc. */
return CURLE_OK;
/* store remote address and port used in this connection attempt */
if(!getaddressinfo((struct sockaddr*)&addr.sa_addr,
ipaddress, &port)) {
/* malformed address or bug in inet_ntop, try next address */
error = ERRNO;
failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
error, Curl_strerror(conn, error));
Curl_closesocket(conn, sockfd);
return CURLE_OK;
}
infof(data, " Trying %s...\n", ipaddress);
if(data->set.tcp_nodelay)
tcpnodelay(conn, sockfd);
nosigpipe(conn, sockfd);
Curl_sndbufset(sockfd);
if(data->set.tcp_keepalive)
tcpkeepalive(data, sockfd);
if(data->set.fsockopt) {
/* activate callback for setting socket options */
error = data->set.fsockopt(data->set.sockopt_client,
sockfd,
CURLSOCKTYPE_IPCXN);
if(error == CURL_SOCKOPT_ALREADY_CONNECTED)
isconnected = TRUE;
else if(error) {
Curl_closesocket(conn, sockfd); /* close the socket and bail out */
return CURLE_ABORTED_BY_CALLBACK;
}
}
/* possibly bind the local end to an IP, interface or port */
res = bindlocal(conn, sockfd, addr.family);
if(res) {
Curl_closesocket(conn, sockfd); /* close socket and bail out */
if(res == CURLE_UNSUPPORTED_PROTOCOL) {
/* The address family is not supported on this interface.
We can continue trying addresses */
return CURLE_OK;
}
return res;
}
/* set socket non-blocking */
curlx_nonblock(sockfd, TRUE);
conn->connecttime = Curl_tvnow();
if(conn->num_addr > 1)
Curl_expire(data, conn->timeoutms_per_addr);
/* Connect TCP sockets, bind UDP */
if(!isconnected && (conn->socktype == SOCK_STREAM)) {
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
if(-1 == rc)
error = SOCKERRNO;
}
else {
*sockp = sockfd;
return CURLE_OK;
}
#ifdef ENABLE_IPV6
conn->bits.ipv6 = (addr.family == AF_INET6)?TRUE:FALSE;
#endif
if(-1 == rc) {
switch(error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN)
#if (EAGAIN) != (EWOULDBLOCK)
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
#endif
res = CURLE_OK;
break;
default:
/* unknown error, fallthrough and try another address! */
infof(data, "Immediate connect fail for %s: %s\n",
ipaddress, Curl_strerror(conn,error));
data->state.os_errno = error;
/* connect failed */
Curl_closesocket(conn, sockfd);
res = CURLE_COULDNT_CONNECT;
}
}
if(!res)
*sockp = sockfd;
return res;
}
/*
* curl_easy_pause() allows an application to pause or unpause a specific
* transfer and direction. This function sets the full new state for the
* current connection this easy handle operates on.
*
* NOTE: if you have the receiving paused and you call this function to remove
* the pausing, you may get your write callback called at this point.
*
* Action is a bitmask consisting of CURLPAUSE_* bits in curl/curl.h
*/
CURLcode curl_easy_pause(CURL *curl, int action)
{
struct SessionHandle *data = (struct SessionHandle *)curl;
struct SingleRequest *k = &data->req;
CURLcode result = CURLE_OK;
/* first switch off both pause bits */
int newstate = k->keepon &~ (KEEP_RECV_PAUSE| KEEP_SEND_PAUSE);
/* set the new desired pause bits */
newstate |= ((action & CURLPAUSE_RECV)?KEEP_RECV_PAUSE:0) |
((action & CURLPAUSE_SEND)?KEEP_SEND_PAUSE:0);
/* put it back in the keepon */
k->keepon = newstate;
if(!(newstate & KEEP_RECV_PAUSE) && data->state.tempwrite) {
/* we have a buffer for sending that we now seem to be able to deliver
since the receive pausing is lifted! */
/* get the pointer, type and length in local copies since the function may
return PAUSE again and then we'll get a new copy allocted and stored in
the tempwrite variables */
char *tempwrite = data->state.tempwrite;
char *freewrite = tempwrite; /* store this pointer to free it later */
size_t tempsize = data->state.tempwritesize;
int temptype = data->state.tempwritetype;
size_t chunklen;
/* clear tempwrite here just to make sure it gets cleared if there's no
further use of it, and make sure we don't clear it after the function
invoke as it may have been set to a new value by then */
data->state.tempwrite = NULL;
/* since the write callback API is define to never exceed
CURL_MAX_WRITE_SIZE bytes in a single call, and since we may in fact
have more data than that in our buffer here, we must loop sending the
data in multiple calls until there's no data left or we get another
pause returned.
A tricky part is that the function we call will "buffer" the data
itself when it pauses on a particular buffer, so we may need to do some
extra trickery if we get a pause return here.
*/
do {
chunklen = (tempsize > CURL_MAX_WRITE_SIZE)?CURL_MAX_WRITE_SIZE:tempsize;
result = Curl_client_write(data->easy_conn,
temptype, tempwrite, chunklen);
if(result)
/* failures abort the loop at once */
break;
if(data->state.tempwrite && (tempsize - chunklen)) {
/* Ouch, the reading is again paused and the block we send is now
"cached". If this is the final chunk we can leave it like this, but
if we have more chunks that are cached after this, we need to free
the newly cached one and put back a version that is truly the entire
contents that is saved for later
*/
char *newptr;
/* note that tempsize is still the size as before the callback was
used, and thus the whole piece of data to keep */
newptr = realloc(data->state.tempwrite, tempsize);
if(!newptr) {
free(data->state.tempwrite); /* free old area */
data->state.tempwrite = NULL;
result = CURLE_OUT_OF_MEMORY;
/* tempwrite will be freed further down */
break;
}
data->state.tempwrite = newptr; /* store new pointer */
memcpy(newptr, tempwrite, tempsize);
data->state.tempwritesize = tempsize; /* store new size */
/* tempwrite will be freed further down */
break; /* go back to pausing until further notice */
}
else {
tempsize -= chunklen; /* left after the call above */
tempwrite += chunklen; /* advance the pointer */
}
} while((result == CURLE_OK) && tempsize);
free(freewrite); /* this is unconditionally no longer used */
}
/* if there's no error and we're not pausing both directions, we want
to have this handle checked soon */
if(!result &&
((newstate&(KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) !=
(KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) )
Curl_expire(data, 1); /* get this handle going again */
return result;
}
/*
* curl_easy_pause() allows an application to pause or unpause a specific
* transfer and direction. This function sets the full new state for the
* current connection this easy handle operates on.
*
* NOTE: if you have the receiving paused and you call this function to remove
* the pausing, you may get your write callback called at this point.
*
* Action is a bitmask consisting of CURLPAUSE_* bits in curl/curl.h
*/
CURLcode curl_easy_pause(struct Curl_easy *data, int action)
{
struct SingleRequest *k = &data->req;
CURLcode result = CURLE_OK;
/* first switch off both pause bits */
int newstate = k->keepon &~ (KEEP_RECV_PAUSE| KEEP_SEND_PAUSE);
/* set the new desired pause bits */
newstate |= ((action & CURLPAUSE_RECV)?KEEP_RECV_PAUSE:0) |
((action & CURLPAUSE_SEND)?KEEP_SEND_PAUSE:0);
/* put it back in the keepon */
k->keepon = newstate;
if(!(newstate & KEEP_RECV_PAUSE) && data->state.tempcount) {
/* there are buffers for sending that can be delivered as the receive
pausing is lifted! */
unsigned int i;
unsigned int count = data->state.tempcount;
struct tempbuf writebuf[3]; /* there can only be three */
struct connectdata *conn = data->easy_conn;
struct Curl_easy *saved_data = NULL;
/* copy the structs to allow for immediate re-pausing */
for(i = 0; i < data->state.tempcount; i++) {
writebuf[i] = data->state.tempwrite[i];
data->state.tempwrite[i].buf = NULL;
}
data->state.tempcount = 0;
/* set the connection's current owner */
if(conn->data != data) {
saved_data = conn->data;
conn->data = data;
}
for(i = 0; i < count; i++) {
/* even if one function returns error, this loops through and frees all
buffers */
if(!result)
result = Curl_client_chop_write(conn,
writebuf[i].type,
writebuf[i].buf,
writebuf[i].len);
free(writebuf[i].buf);
}
/* recover previous owner of the connection */
if(saved_data)
conn->data = saved_data;
if(result)
return result;
}
/* if there's no error and we're not pausing both directions, we want
to have this handle checked soon */
if(!result &&
((newstate&(KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) !=
(KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) )
Curl_expire(data, 0, EXPIRE_RUN_NOW); /* get this handle going again */
return result;
}
CURLcode Curl_connecthost(struct connectdata *conn, /* context */
const struct Curl_dns_entry *remotehost, /* use this one */
curl_socket_t *sockconn, /* the connected socket */
Curl_addrinfo **addr, /* the one we used */
bool *connected) /* really connected? */
{
struct SessionHandle *data = conn->data;
curl_socket_t sockfd = CURL_SOCKET_BAD;
int aliasindex;
int num_addr;
Curl_addrinfo *ai;
Curl_addrinfo *curr_addr;
struct timeval after;
struct timeval before = Curl_tvnow();
/*************************************************************
* Figure out what maximum time we have left
*************************************************************/
long timeout_ms= DEFAULT_CONNECT_TIMEOUT;
long timeout_per_addr;
*connected = FALSE; /* default to not connected */
if(data->set.timeout || data->set.connecttimeout) {
long has_passed;
/* Evaluate in milliseconds how much time that has passed */
has_passed = Curl_tvdiff(Curl_tvnow(), data->progress.t_startsingle);
#ifndef min
#define min(a, b) ((a) < (b) ? (a) : (b))
#endif
/* get the most strict timeout of the ones converted to milliseconds */
if(data->set.timeout && data->set.connecttimeout) {
if (data->set.timeout < data->set.connecttimeout)
timeout_ms = data->set.timeout*1000;
else
timeout_ms = data->set.connecttimeout*1000;
}
else if(data->set.timeout)
timeout_ms = data->set.timeout*1000;
else
timeout_ms = data->set.connecttimeout*1000;
/* subtract the passed time */
timeout_ms -= has_passed;
if(timeout_ms < 0) {
/* a precaution, no need to continue if time already is up */
failf(data, "Connection time-out");
return CURLE_OPERATION_TIMEOUTED;
}
}
Curl_expire(data, timeout_ms);
/* Max time for each address */
num_addr = Curl_num_addresses(remotehost->addr);
timeout_per_addr = timeout_ms / num_addr;
ai = remotehost->addr;
/* Below is the loop that attempts to connect to all IP-addresses we
* know for the given host. One by one until one IP succeeds.
*/
if(data->state.used_interface == Curl_if_multi)
/* don't hang when doing multi */
timeout_per_addr = 0;
/*
* Connecting with a Curl_addrinfo chain
*/
for (curr_addr = ai, aliasindex=0; curr_addr;
curr_addr = curr_addr->ai_next, aliasindex++) {
/* start connecting to the IP curr_addr points to */
sockfd = singleipconnect(conn, curr_addr, timeout_per_addr, connected);
if(sockfd != CURL_SOCKET_BAD)
break;
/* get a new timeout for next attempt */
after = Curl_tvnow();
timeout_ms -= Curl_tvdiff(after, before);
if(timeout_ms < 0) {
failf(data, "connect() timed out!");
return CURLE_OPERATION_TIMEOUTED;
}
before = after;
} /* end of connect-to-each-address loop */
if (sockfd == CURL_SOCKET_BAD) {
/* no good connect was made */
*sockconn = CURL_SOCKET_BAD;
failf(data, "couldn't connect to host");
return CURLE_COULDNT_CONNECT;
}
/* leave the socket in non-blocking mode */
/* store the address we use */
if(addr)
*addr = curr_addr;
/* allow NULL-pointers to get passed in */
if(sockconn)
*sockconn = sockfd; /* the socket descriptor we've connected */
data->info.numconnects++; /* to track the number of connections made */
return CURLE_OK;
}
CURLcode Curl_is_connected(struct connectdata *conn,
int sockindex,
bool *connected)
{
int rc;
struct SessionHandle *data = conn->data;
CURLcode code = CURLE_OK;
curl_socket_t sockfd = conn->sock[sockindex];
long allow = DEFAULT_CONNECT_TIMEOUT;
long allow_total = 0;
long has_passed;
curlassert(sockindex >= FIRSTSOCKET && sockindex <= SECONDARYSOCKET);
*connected = FALSE; /* a very negative world view is best */
/* Evaluate in milliseconds how much time that has passed */
has_passed = Curl_tvdiff(Curl_tvnow(), data->progress.t_startsingle);
/* subtract the most strict timeout of the ones */
if(data->set.timeout && data->set.connecttimeout) {
if (data->set.timeout < data->set.connecttimeout)
allow_total = allow = data->set.timeout*1000;
else
allow = data->set.connecttimeout*1000;
}
else if(data->set.timeout) {
allow_total = allow = data->set.timeout*1000;
}
else if(data->set.connecttimeout) {
allow = data->set.connecttimeout*1000;
}
if(has_passed > allow ) {
/* time-out, bail out, go home */
failf(data, "Connection time-out after %ld ms", has_passed);
return CURLE_OPERATION_TIMEOUTED;
}
if(conn->bits.tcpconnect) {
/* we are connected already! */
Curl_expire(data, allow_total);
*connected = TRUE;
return CURLE_OK;
}
Curl_expire(data, allow);
/* check for connect without timeout as we want to return immediately */
rc = waitconnect(sockfd, 0);
if(WAITCONN_CONNECTED == rc) {
int error;
if (verifyconnect(sockfd, &error)) {
/* we are connected, awesome! */
*connected = TRUE;
return CURLE_OK;
}
/* nope, not connected for real */
data->state.os_errno = error;
infof(data, "Connection failed\n");
if(trynextip(conn, sockindex, connected)) {
code = CURLE_COULDNT_CONNECT;
}
}
else if(WAITCONN_TIMEOUT != rc) {
int error = 0;
/* nope, not connected */
if (WAITCONN_FDSET_ERROR == rc) {
(void)verifyconnect(sockfd, &error);
data->state.os_errno = error;
infof(data, "%s\n",Curl_strerror(conn,error));
}
else
infof(data, "Connection failed\n");
if(trynextip(conn, sockindex, connected)) {
error = Curl_sockerrno();
data->state.os_errno = error;
failf(data, "Failed connect to %s:%d; %s",
conn->host.name, conn->port, Curl_strerror(conn,error));
code = CURLE_COULDNT_CONNECT;
}
}
/*
* If the connection failed here, we should attempt to connect to the "next
* address" for the given host.
*/
return code;
}
/*
* singleipconnect()
*
* Note that even on connect fail it returns CURLE_OK, but with 'sock' set to
* CURL_SOCKET_BAD. Other errors will however return proper errors.
*
* singleipconnect() connects to the given IP only, and it may return without
* having connected if used from the multi interface.
*/
static CURLcode
singleipconnect(struct connectdata *conn,
const Curl_addrinfo *ai,
long timeout_ms,
curl_socket_t *sockp,
bool *connected)
{
struct Curl_sockaddr_ex addr;
int rc;
int error;
bool isconnected = FALSE;
struct SessionHandle *data = conn->data;
curl_socket_t sockfd;
CURLcode res = CURLE_OK;
#if defined(ENABLE_IPV6) && defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID)
struct sockaddr_in6 * const sa6 = (void *)&addr.sa_addr;
#endif
*sockp = CURL_SOCKET_BAD;
/*
* The Curl_sockaddr_ex structure is basically libcurl's external API
* curl_sockaddr structure with enough space available to directly hold
* any protocol-specific address structures. The variable declared here
* will be used to pass / receive data to/from the fopensocket callback
* if this has been set, before that, it is initialized from parameters.
*/
addr.family = ai->ai_family;
addr.socktype = conn->socktype;
addr.protocol = conn->socktype==SOCK_DGRAM?IPPROTO_UDP:ai->ai_protocol;
addr.addrlen = ai->ai_addrlen;
if(addr.addrlen > sizeof(struct Curl_sockaddr_storage))
addr.addrlen = sizeof(struct Curl_sockaddr_storage);
memcpy(&addr.sa_addr, ai->ai_addr, addr.addrlen);
*connected = FALSE; /* default is not connected */
if(data->set.fopensocket)
/*
* If the opensocket callback is set, all the destination address
* information is passed to the callback. Depending on this information the
* callback may opt to abort the connection, this is indicated returning
* CURL_SOCKET_BAD; otherwise it will return a not-connected socket. When
* the callback returns a valid socket the destination address information
* might have been changed and this 'new' address will actually be used
* here to connect.
*/
sockfd = data->set.fopensocket(data->set.opensocket_client,
CURLSOCKTYPE_IPCXN,
(struct curl_sockaddr *)&addr);
else
/* opensocket callback not set, so simply create the socket now */
sockfd = socket(addr.family, addr.socktype, addr.protocol);
if(sockfd == CURL_SOCKET_BAD)
/* no socket, no connection */
return CURLE_OK;
#if defined(ENABLE_IPV6) && defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID)
if(conn->scope && (addr.family == AF_INET6))
sa6->sin6_scope_id = conn->scope;
#endif
/* store remote address and port used in this connection attempt */
if(!getaddressinfo((struct sockaddr*)&addr.sa_addr,
conn->primary_ip, &conn->primary_port)) {
/* malformed address or bug in inet_ntop, try next address */
error = ERRNO;
failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
error, Curl_strerror(conn, error));
Curl_closesocket(conn, sockfd);
return CURLE_OK;
}
memcpy(conn->ip_addr_str, conn->primary_ip, MAX_IPADR_LEN);
infof(data, " Trying %s... ", conn->ip_addr_str);
Curl_persistconninfo(conn);
#ifdef ENABLE_IPV6
if(addr.family == AF_INET6)
conn->bits.ipv6 = TRUE;
#endif
if(data->set.tcp_nodelay)
tcpnodelay(conn, sockfd);
nosigpipe(conn, sockfd);
Curl_sndbufset(sockfd);
if(data->set.fsockopt) {
/* activate callback for setting socket options */
error = data->set.fsockopt(data->set.sockopt_client,
sockfd,
CURLSOCKTYPE_IPCXN);
if(error == CURL_SOCKOPT_ALREADY_CONNECTED)
isconnected = TRUE;
else if(error) {
Curl_closesocket(conn, sockfd); /* close the socket and bail out */
return CURLE_ABORTED_BY_CALLBACK;
}
}
/* possibly bind the local end to an IP, interface or port */
res = bindlocal(conn, sockfd, addr.family);
if(res) {
Curl_closesocket(conn, sockfd); /* close socket and bail out */
return res;
}
/* set socket non-blocking */
curlx_nonblock(sockfd, TRUE);
/* Connect TCP sockets, bind UDP */
if(!isconnected && (conn->socktype == SOCK_STREAM)) {
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
conn->connecttime = Curl_tvnow();
if(conn->num_addr > 1)
Curl_expire(data, conn->timeoutms_per_addr);
}
else
rc = 0;
if(-1 == rc) {
error = SOCKERRNO;
switch (error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN)
#if (EAGAIN) != (EWOULDBLOCK)
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
#endif
rc = waitconnect(conn, sockfd, timeout_ms);
if(WAITCONN_ABORTED == rc) {
Curl_closesocket(conn, sockfd);
return CURLE_ABORTED_BY_CALLBACK;
}
break;
default:
/* unknown error, fallthrough and try another address! */
failf(data, "Failed to connect to %s: %s",
conn->ip_addr_str, Curl_strerror(conn,error));
data->state.os_errno = error;
break;
}
}
/* The 'WAITCONN_TIMEOUT == rc' comes from the waitconnect(), and not from
connect(). We can be sure of this since connect() cannot return 1. */
if((WAITCONN_TIMEOUT == rc) &&
(data->state.used_interface == Curl_if_multi)) {
/* Timeout when running the multi interface */
*sockp = sockfd;
return CURLE_OK;
}
if(!isconnected)
isconnected = verifyconnect(sockfd, &error);
if(!rc && isconnected) {
/* we are connected, awesome! */
*connected = TRUE; /* this is a true connect */
infof(data, "connected\n");
Curl_updateconninfo(conn, sockfd);
*sockp = sockfd;
return CURLE_OK;
}
else if(WAITCONN_TIMEOUT == rc)
infof(data, "Timeout\n");
else {
data->state.os_errno = error;
infof(data, "%s\n", Curl_strerror(conn, error));
}
/* connect failed or timed out */
Curl_closesocket(conn, sockfd);
return CURLE_OK;
}
/* frame->hd.type is either NGHTTP2_HEADERS or NGHTTP2_PUSH_PROMISE */
static int on_header(nghttp2_session *session, const nghttp2_frame *frame,
const uint8_t *name, size_t namelen,
const uint8_t *value, size_t valuelen,
uint8_t flags,
void *userp)
{
struct HTTP *stream;
struct SessionHandle *data_s;
int32_t stream_id = frame->hd.stream_id;
struct connectdata *conn = (struct connectdata *)userp;
(void)flags;
DEBUGASSERT(stream_id); /* should never be a zero stream ID here */
/* get the stream from the hash based on Stream ID */
data_s = nghttp2_session_get_stream_user_data(session, stream_id);
if(!data_s)
/* Receiving a Stream ID not in the hash should not happen, this is an
internal error more than anything else! */
return NGHTTP2_ERR_CALLBACK_FAILURE;
stream = data_s->req.protop;
if(!stream) {
failf(data_s, "Internal NULL stream! 5\n");
return NGHTTP2_ERR_CALLBACK_FAILURE;
}
if(stream->bodystarted)
/* Ignore trailer or HEADERS not mapped to HTTP semantics. The
consequence is handled in on_frame_recv(). */
return 0;
/* Store received PUSH_PROMISE headers to be used when the subsequent
PUSH_PROMISE callback comes */
if(frame->hd.type == NGHTTP2_PUSH_PROMISE) {
char *h;
if(!stream->push_headers) {
stream->push_headers_alloc = 10;
stream->push_headers = malloc(stream->push_headers_alloc *
sizeof(char *));
stream->push_headers_used = 0;
}
else if(stream->push_headers_used ==
stream->push_headers_alloc) {
char **headp;
stream->push_headers_alloc *= 2;
headp = realloc(stream->push_headers,
stream->push_headers_alloc * sizeof(char *));
if(!headp) {
free(stream->push_headers);
stream->push_headers = NULL;
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
}
stream->push_headers = headp;
}
h = aprintf("%s:%s", name, value);
if(h)
stream->push_headers[stream->push_headers_used++] = h;
return 0;
}
if(namelen == sizeof(":status") - 1 &&
memcmp(":status", name, namelen) == 0) {
/* nghttp2 guarantees :status is received first and only once, and
value is 3 digits status code, and decode_status_code always
succeeds. */
stream->status_code = decode_status_code(value, valuelen);
DEBUGASSERT(stream->status_code != -1);
Curl_add_buffer(stream->header_recvbuf, "HTTP/2.0 ", 9);
Curl_add_buffer(stream->header_recvbuf, value, valuelen);
Curl_add_buffer(stream->header_recvbuf, "\r\n", 2);
data_s->state.drain++;
/* if we receive data for another handle, wake that up */
if(conn->data != data_s)
Curl_expire(data_s, 1);
DEBUGF(infof(data_s, "h2 status: HTTP/2 %03d\n",
stream->status_code));
return 0;
}
/* nghttp2 guarantees that namelen > 0, and :status was already
received, and this is not pseudo-header field . */
/* convert to a HTTP1-style header */
Curl_add_buffer(stream->header_recvbuf, name, namelen);
Curl_add_buffer(stream->header_recvbuf, ":", 1);
Curl_add_buffer(stream->header_recvbuf, value, valuelen);
Curl_add_buffer(stream->header_recvbuf, "\r\n", 2);
data_s->state.drain++;
/* if we receive data for another handle, wake that up */
if(conn->data != data_s)
Curl_expire(data_s, 1);
DEBUGF(infof(data_s, "h2 header: %.*s: %.*s\n", namelen, name, valuelen,
value));
return 0; /* 0 is successful */
}
static int on_frame_recv(nghttp2_session *session, const nghttp2_frame *frame,
void *userp)
{
struct connectdata *conn = (struct connectdata *)userp;
struct http_conn *httpc = NULL;
struct SessionHandle *data_s = NULL;
struct HTTP *stream = NULL;
static int lastStream = -1;
int rv;
size_t left, ncopy;
int32_t stream_id = frame->hd.stream_id;
if(!stream_id) {
/* stream ID zero is for connection-oriented stuff */
return 0;
}
data_s = nghttp2_session_get_stream_user_data(session,
frame->hd.stream_id);
if(lastStream != frame->hd.stream_id) {
lastStream = frame->hd.stream_id;
}
if(!data_s) {
DEBUGF(infof(conn->data,
"No SessionHandle associated with stream: %x\n",
stream_id));
return 0;
}
stream = data_s->req.protop;
if(!stream)
return NGHTTP2_ERR_CALLBACK_FAILURE;
DEBUGF(infof(data_s, "on_frame_recv() header %x stream %x\n",
frame->hd.type, stream_id));
conn = data_s->easy_conn;
assert(conn);
assert(conn->data == data_s);
httpc = &conn->proto.httpc;
switch(frame->hd.type) {
case NGHTTP2_DATA:
/* If body started on this stream, then receiving DATA is illegal. */
if(!stream->bodystarted) {
rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
stream_id, NGHTTP2_PROTOCOL_ERROR);
if(nghttp2_is_fatal(rv)) {
return NGHTTP2_ERR_CALLBACK_FAILURE;
}
}
break;
case NGHTTP2_HEADERS:
if(frame->headers.cat == NGHTTP2_HCAT_REQUEST)
break;
if(stream->bodystarted) {
/* Only valid HEADERS after body started is trailer HEADERS. We
ignores trailer HEADERS for now. nghttp2 guarantees that it
has END_STREAM flag set. */
break;
}
/* nghttp2 guarantees that :status is received, and we store it to
stream->status_code */
DEBUGASSERT(stream->status_code != -1);
/* Only final status code signals the end of header */
if(stream->status_code / 100 != 1) {
stream->bodystarted = TRUE;
stream->status_code = -1;
}
Curl_add_buffer(stream->header_recvbuf, "\r\n", 2);
left = stream->header_recvbuf->size_used - stream->nread_header_recvbuf;
ncopy = MIN(stream->len, left);
memcpy(&stream->mem[stream->memlen],
stream->header_recvbuf->buffer + stream->nread_header_recvbuf,
ncopy);
stream->nread_header_recvbuf += ncopy;
DEBUGF(infof(data_s, "Store %zu bytes headers from stream %u at %p\n",
ncopy, stream_id, stream->mem));
stream->len -= ncopy;
stream->memlen += ncopy;
data_s->state.drain++;
{
/* get the pointer from userp again since it was re-assigned above */
struct connectdata *conn_s = (struct connectdata *)userp;
/* if we receive data for another handle, wake that up */
if(conn_s->data != data_s)
Curl_expire(data_s, 1);
}
break;
case NGHTTP2_PUSH_PROMISE:
rv = push_promise(data_s, conn, &frame->push_promise);
if(rv) { /* deny! */
rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
frame->push_promise.promised_stream_id,
NGHTTP2_CANCEL);
if(nghttp2_is_fatal(rv)) {
return rv;
}
}
break;
case NGHTTP2_SETTINGS:
{
uint32_t max_conn = httpc->settings.max_concurrent_streams;
DEBUGF(infof(conn->data, "Got SETTINGS for stream %u!\n", stream_id));
httpc->settings.max_concurrent_streams =
nghttp2_session_get_remote_settings(
session, NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS);
httpc->settings.enable_push =
nghttp2_session_get_remote_settings(
session, NGHTTP2_SETTINGS_ENABLE_PUSH);
DEBUGF(infof(conn->data, "MAX_CONCURRENT_STREAMS == %d\n",
httpc->settings.max_concurrent_streams));
DEBUGF(infof(conn->data, "ENABLE_PUSH == %s\n",
httpc->settings.enable_push?"TRUE":"false"));
if(max_conn != httpc->settings.max_concurrent_streams) {
/* only signal change if the value actually changed */
infof(conn->data,
"Connection state changed (MAX_CONCURRENT_STREAMS updated)!\n");
Curl_multi_connchanged(conn->data->multi);
}
}
break;
default:
DEBUGF(infof(conn->data, "Got frame type %x for stream %u!\n",
frame->hd.type, stream_id));
break;
}
return 0;
}
