diff options
Diffstat (limited to 'Utilities/cmcurl/lib/cfilters.c')
| -rw-r--r-- | Utilities/cmcurl/lib/cfilters.c | 502 |
1 files changed, 502 insertions, 0 deletions
diff --git a/Utilities/cmcurl/lib/cfilters.c b/Utilities/cmcurl/lib/cfilters.c new file mode 100644 index 0000000000..bcb33da771 --- /dev/null +++ b/Utilities/cmcurl/lib/cfilters.c @@ -0,0 +1,502 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al. + * + * This software is licensed as described in the file COPYING, which + * you should have received as part of this distribution. The terms + * are also available at https://curl.se/docs/copyright.html. + * + * You may opt to use, copy, modify, merge, publish, distribute and/or sell + * copies of the Software, and permit persons to whom the Software is + * furnished to do so, under the terms of the COPYING file. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + * SPDX-License-Identifier: curl + * + ***************************************************************************/ + +#include "curl_setup.h" + +#include "urldata.h" +#include "strerror.h" +#include "cfilters.h" +#include "connect.h" +#include "url.h" /* for Curl_safefree() */ +#include "sendf.h" +#include "sockaddr.h" /* required for Curl_sockaddr_storage */ +#include "multiif.h" +#include "progress.h" +#include "warnless.h" +#include "http_proxy.h" +#include "socks.h" +#include "vtls/vtls.h" + +/* The last 3 #include files should be in this order */ +#include "curl_printf.h" +#include "curl_memory.h" +#include "memdebug.h" + +#ifndef ARRAYSIZE +#define ARRAYSIZE(A) (sizeof(A)/sizeof((A)[0])) +#endif + + +void Curl_cf_def_destroy_this(struct Curl_cfilter *cf, struct Curl_easy *data) +{ + (void)cf; + (void)data; +} + +CURLcode Curl_cf_def_setup(struct Curl_cfilter *cf, + struct Curl_easy *data, + const struct Curl_dns_entry *remotehost) +{ + DEBUGASSERT(cf->next); + return cf->next->cft->setup(cf->next, data, remotehost); +} + +void Curl_cf_def_attach_data(struct Curl_cfilter *cf, + struct Curl_easy *data) +{ + (void)cf; + (void)data; +} + +void Curl_cf_def_detach_data(struct Curl_cfilter *cf, + struct Curl_easy *data) +{ + (void)cf; + (void)data; +} + +void Curl_cf_def_close(struct Curl_cfilter *cf, struct Curl_easy *data) +{ + DEBUGASSERT(cf->next); + cf->connected = FALSE; + cf->next->cft->close(cf->next, data); +} + +CURLcode Curl_cf_def_connect(struct Curl_cfilter *cf, + struct Curl_easy *data, + bool blocking, bool *done) +{ + DEBUGASSERT(cf->next); + return cf->next->cft->connect(cf->next, data, blocking, done); +} + +void Curl_cf_def_get_host(struct Curl_cfilter *cf, struct Curl_easy *data, + const char **phost, const char **pdisplay_host, + int *pport) +{ + DEBUGASSERT(cf->next); + cf->next->cft->get_host(cf->next, data, phost, pdisplay_host, pport); +} + +int Curl_cf_def_get_select_socks(struct Curl_cfilter *cf, + struct Curl_easy *data, + curl_socket_t *socks) +{ + DEBUGASSERT(cf->next); + return cf->next->cft->get_select_socks(cf->next, data, socks); +} + +bool Curl_cf_def_data_pending(struct Curl_cfilter *cf, + const struct Curl_easy *data) +{ + DEBUGASSERT(cf->next); + return cf->next->cft->has_data_pending(cf->next, data); +} + +ssize_t Curl_cf_def_send(struct Curl_cfilter *cf, struct Curl_easy *data, + const void *buf, size_t len, CURLcode *err) +{ + DEBUGASSERT(cf->next); + return cf->next->cft->do_send(cf->next, data, buf, len, err); +} + +ssize_t Curl_cf_def_recv(struct Curl_cfilter *cf, struct Curl_easy *data, + char *buf, size_t len, CURLcode *err) +{ + DEBUGASSERT(cf->next); + return cf->next->cft->do_recv(cf->next, data, buf, len, err); +} + +void Curl_conn_cf_discard_all(struct Curl_easy *data, + struct connectdata *conn, int index) +{ + struct Curl_cfilter *cfn, *cf = conn->cfilter[index]; + + if(cf) { + conn->cfilter[index] = NULL; + while(cf) { + cfn = cf->next; + cf->cft->destroy(cf, data); + free(cf); + cf = cfn; + } + } +} + +void Curl_conn_close(struct Curl_easy *data, int index) +{ + struct Curl_cfilter *cf; + + DEBUGASSERT(data->conn); + /* it is valid to call that without filters being present */ + cf = data->conn->cfilter[index]; + if(cf) { + cf->cft->close(cf, data); + } +} + +ssize_t Curl_conn_recv(struct Curl_easy *data, int num, char *buf, + size_t len, CURLcode *code) +{ + struct Curl_cfilter *cf; + ssize_t nread; + + DEBUGASSERT(data); + DEBUGASSERT(data->conn); + cf = data->conn->cfilter[num]; + while(cf && !cf->connected) { + cf = cf->next; + } + if(cf) { + nread = cf->cft->do_recv(cf, data, buf, len, code); + /* DEBUGF(infof(data, "Curl_conn_recv(handle=%p, index=%d)" + "-> %ld, err=%d", data, num, nread, *code));*/ + return nread; + } + failf(data, "no filter connected, conn=%ld, sockindex=%d", + data->conn->connection_id, num); + *code = CURLE_FAILED_INIT; + return -1; +} + +ssize_t Curl_conn_send(struct Curl_easy *data, int num, + const void *mem, size_t len, CURLcode *code) +{ + struct Curl_cfilter *cf; + ssize_t nwritten; + + DEBUGASSERT(data); + DEBUGASSERT(data->conn); + cf = data->conn->cfilter[num]; + while(cf && !cf->connected) { + cf = cf->next; + } + if(cf) { + nwritten = cf->cft->do_send(cf, data, mem, len, code); + /* DEBUGF(infof(data, "Curl_conn_send(handle=%p, index=%d, len=%ld)" + " -> %ld, err=%d", data, num, len, nwritten, *code));*/ + return nwritten; + } + failf(data, "no filter connected, conn=%ld, sockindex=%d", + data->conn->connection_id, num); + *code = CURLE_FAILED_INIT; + return -1; +} + +CURLcode Curl_cf_create(struct Curl_cfilter **pcf, + const struct Curl_cftype *cft, + void *ctx) +{ + struct Curl_cfilter *cf; + CURLcode result = CURLE_OUT_OF_MEMORY; + + DEBUGASSERT(cft); + cf = calloc(sizeof(*cf), 1); + if(!cf) + goto out; + + cf->cft = cft; + cf->ctx = ctx; + result = CURLE_OK; +out: + *pcf = cf; + return result; +} + +void Curl_conn_cf_add(struct Curl_easy *data, + struct connectdata *conn, + int index, + struct Curl_cfilter *cf) +{ + (void)data; + DEBUGASSERT(conn); + DEBUGASSERT(!cf->conn); + DEBUGASSERT(!cf->next); + + DEBUGF(infof(data, CMSGI(conn, index, "cf_add(filter=%s)"), + cf->cft->name)); + cf->next = conn->cfilter[index]; + cf->conn = conn; + cf->sockindex = index; + conn->cfilter[index] = cf; +} + +void Curl_conn_cf_discard(struct Curl_cfilter *cf, struct Curl_easy *data) +{ + struct Curl_cfilter **pprev = &cf->conn->cfilter[cf->sockindex]; + + /* remove from chain if still in there */ + DEBUGASSERT(cf); + while (*pprev) { + if (*pprev == cf) { + *pprev = cf->next; + break; + } + pprev = &((*pprev)->next); + } + cf->cft->destroy(cf, data); + free(cf); +} + +ssize_t Curl_conn_cf_send(struct Curl_cfilter *cf, struct Curl_easy *data, + const void *buf, size_t len, CURLcode *err) +{ + return cf->cft->do_send(cf, data, buf, len, err); +} + +ssize_t Curl_conn_cf_recv(struct Curl_cfilter *cf, struct Curl_easy *data, + char *buf, size_t len, CURLcode *err) +{ + return cf->cft->do_recv(cf, data, buf, len, err); +} + +CURLcode Curl_conn_setup(struct Curl_easy *data, + struct connectdata *conn, + int sockindex, + const struct Curl_dns_entry *remotehost, + int ssl_mode) +{ + struct Curl_cfilter *cf; + CURLcode result; + + DEBUGASSERT(data); + /* If no filter is set, we have the "default" setup of connection filters. + * The filter chain from botton to top will be: + * - SOCKET socket filter for outgoing connection to remotehost + * if http_proxy tunneling is engaged: + * - SSL if proxytype is CURLPROXY_HTTPS + * - HTTP_PROXY_TUNNEL + * otherwise, if socks_proxy is engaged: + * - SOCKS_PROXY_TUNNEL + * - SSL if conn->handler has PROTOPT_SSL + */ + if(!conn->cfilter[sockindex]) { + DEBUGF(infof(data, DMSGI(data, sockindex, "setup, init filter chain"))); + result = Curl_conn_socket_set(data, conn, sockindex); + if(result) + goto out; + +#ifndef CURL_DISABLE_PROXY + if(conn->bits.socksproxy) { + result = Curl_conn_socks_proxy_add(data, conn, sockindex); + if(result) + goto out; + } + + if(conn->bits.httpproxy) { +#ifdef USE_SSL + if(conn->http_proxy.proxytype == CURLPROXY_HTTPS) { + result = Curl_ssl_cfilter_proxy_add(data, conn, sockindex); + if(result) + goto out; + } +#endif /* USE_SSL */ + +#if !defined(CURL_DISABLE_HTTP) + if(conn->bits.tunnel_proxy) { + result = Curl_conn_http_proxy_add(data, conn, sockindex); + if(result) + goto out; + } +#endif /* !CURL_DISABLE_HTTP */ + } +#endif /* !CURL_DISABLE_PROXY */ + +#ifdef USE_SSL + if(ssl_mode == CURL_CF_SSL_ENABLE + || (ssl_mode != CURL_CF_SSL_DISABLE + && conn->handler->flags & PROTOPT_SSL)) { + result = Curl_ssl_cfilter_add(data, conn, sockindex); + if(result) + goto out; + } +#else + (void)ssl_mode; +#endif /* USE_SSL */ + +#if !defined(CURL_DISABLE_PROXY) && !defined(CURL_DISABLE_HTTP) + if(data->set.haproxyprotocol) { + result = Curl_conn_haproxy_add(data, conn, sockindex); + if(result) + goto out; + } +#endif /* !CURL_DISABLE_PROXY && !CURL_DISABLE_HTTP */ + + } + DEBUGASSERT(conn->cfilter[sockindex]); + cf = data->conn->cfilter[sockindex]; + result = cf->cft->setup(cf, data, remotehost); + +out: + return result; +} + +CURLcode Curl_conn_connect(struct Curl_easy *data, + int sockindex, + bool blocking, + bool *done) +{ + struct Curl_cfilter *cf; + CURLcode result; + + DEBUGASSERT(data); + + cf = data->conn->cfilter[sockindex]; + DEBUGASSERT(cf); + result = cf->cft->connect(cf, data, blocking, done); + + DEBUGF(infof(data, DMSGI(data, sockindex, "connect(block=%d)-> %d, done=%d"), + blocking, result, *done)); + return result; +} + +bool Curl_conn_is_connected(struct connectdata *conn, int sockindex) +{ + struct Curl_cfilter *cf; + + cf = conn->cfilter[sockindex]; + return cf && cf->connected; +} + +bool Curl_conn_is_ip_connected(struct Curl_easy *data, int sockindex) +{ + struct Curl_cfilter *cf; + + cf = data->conn->cfilter[sockindex]; + while(cf) { + if(cf->connected) + return TRUE; + if(cf->cft->flags & CF_TYPE_IP_CONNECT) + return FALSE; + cf = cf->next; + } + return FALSE; +} + +bool Curl_conn_is_ssl(struct Curl_easy *data, int sockindex) +{ + struct Curl_cfilter *cf = data->conn? data->conn->cfilter[sockindex] : NULL; + + (void)data; + for(; cf; cf = cf->next) { + if(cf->cft->flags & CF_TYPE_SSL) + return TRUE; + if(cf->cft->flags & CF_TYPE_IP_CONNECT) + return FALSE; + } + return FALSE; +} + + +bool Curl_conn_data_pending(struct Curl_easy *data, int sockindex) +{ + struct Curl_cfilter *cf; + + (void)data; + DEBUGASSERT(data); + DEBUGASSERT(data->conn); + if(Curl_recv_has_postponed_data(data->conn, sockindex)) + return TRUE; + + cf = data->conn->cfilter[sockindex]; + while(cf && !cf->connected) { + cf = cf->next; + } + if(cf) { + return cf->cft->has_data_pending(cf, data); + } + return FALSE; +} + +int Curl_conn_get_select_socks(struct Curl_easy *data, int sockindex, + curl_socket_t *socks) +{ + struct Curl_cfilter *cf; + + DEBUGASSERT(data); + DEBUGASSERT(data->conn); + cf = data->conn->cfilter[sockindex]; + if(cf) { + return cf->cft->get_select_socks(cf, data, socks); + } + return GETSOCK_BLANK; +} + +void Curl_conn_attach_data(struct connectdata *conn, + struct Curl_easy *data) +{ + size_t i; + struct Curl_cfilter *cf; + + for(i = 0; i < ARRAYSIZE(conn->cfilter); ++i) { + cf = conn->cfilter[i]; + if(cf) { + while(cf) { + cf->cft->attach_data(cf, data); + cf = cf->next; + } + } + } +} + +void Curl_conn_detach_data(struct connectdata *conn, + struct Curl_easy *data) +{ + size_t i; + struct Curl_cfilter *cf; + + for(i = 0; i < ARRAYSIZE(conn->cfilter); ++i) { + cf = conn->cfilter[i]; + if(cf) { + while(cf) { + cf->cft->detach_data(cf, data); + cf = cf->next; + } + } + } +} + +void Curl_conn_get_host(struct Curl_easy *data, int sockindex, + const char **phost, const char **pdisplay_host, + int *pport) +{ + struct Curl_cfilter *cf; + + DEBUGASSERT(data->conn); + cf = data->conn->cfilter[sockindex]; + if(cf) { + cf->cft->get_host(cf, data, phost, pdisplay_host, pport); + } + else { + /* Some filter ask during shutdown for this, mainly for debugging + * purposes. We hand out the defaults, however this is not always + * accurate, as the connction might be tunneled, etc. But all that + * state is already gone here. */ + *phost = data->conn->host.name; + *pdisplay_host = data->conn->host.dispname; + *pport = data->conn->remote_port; + } +} + + |