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- #include "curl_setup.h"
- #include "http_proxy.h"
- #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_PROXY)
- #include <curl/curl.h>
- #ifdef USE_HYPER
- #include <hyper.h>
- #endif
- #include "sendf.h"
- #include "http.h"
- #include "url.h"
- #include "select.h"
- #include "progress.h"
- #include "cfilters.h"
- #include "cf-h1-proxy.h"
- #include "cf-h2-proxy.h"
- #include "connect.h"
- #include "curlx.h"
- #include "vtls/vtls.h"
- #include "transfer.h"
- #include "multiif.h"
- #include "vauth/vauth.h"
- #include "curl_printf.h"
- #include "curl_memory.h"
- #include "memdebug.h"
- static bool hd_name_eq(const char *n1, size_t n1len,
- const char *n2, size_t n2len)
- {
- return (n1len == n2len) ? strncasecompare(n1, n2, n1len) : FALSE;
- }
- static CURLcode dynhds_add_custom(struct Curl_easy *data,
- bool is_connect,
- struct dynhds *hds)
- {
- struct connectdata *conn = data->conn;
- char *ptr;
- struct curl_slist *h[2];
- struct curl_slist *headers;
- int numlists = 1;
- int i;
- enum Curl_proxy_use proxy;
- if(is_connect)
- proxy = HEADER_CONNECT;
- else
- proxy = conn->bits.httpproxy && !conn->bits.tunnel_proxy ?
- HEADER_PROXY : HEADER_SERVER;
- switch(proxy) {
- case HEADER_SERVER:
- h[0] = data->set.headers;
- break;
- case HEADER_PROXY:
- h[0] = data->set.headers;
- if(data->set.sep_headers) {
- h[1] = data->set.proxyheaders;
- numlists++;
- }
- break;
- case HEADER_CONNECT:
- if(data->set.sep_headers)
- h[0] = data->set.proxyheaders;
- else
- h[0] = data->set.headers;
- break;
- }
-
- for(i = 0; i < numlists; i++) {
- for(headers = h[i]; headers; headers = headers->next) {
- const char *name, *value;
- size_t namelen, valuelen;
-
- ptr = strchr(headers->data, ':');
- if(ptr) {
- name = headers->data;
- namelen = ptr - headers->data;
- ptr++;
- while(*ptr && ISSPACE(*ptr))
- ptr++;
- if(*ptr) {
- value = ptr;
- valuelen = strlen(value);
- }
- else {
-
- continue;
- }
- }
- else {
- ptr = strchr(headers->data, ';');
- if(!ptr) {
-
- continue;
- }
- name = headers->data;
- namelen = ptr - headers->data;
- ptr++;
- while(*ptr && ISSPACE(*ptr))
- ptr++;
- if(!*ptr) {
-
- value = "";
- valuelen = 0;
- }
- else {
-
- continue;
- }
- }
- DEBUGASSERT(name && value);
- if(data->state.aptr.host &&
-
- hd_name_eq(name, namelen, STRCONST("Host:")))
- ;
- else if(data->state.httpreq == HTTPREQ_POST_FORM &&
-
- hd_name_eq(name, namelen, STRCONST("Content-Type:")))
- ;
- else if(data->state.httpreq == HTTPREQ_POST_MIME &&
-
- hd_name_eq(name, namelen, STRCONST("Content-Type:")))
- ;
- else if(data->req.authneg &&
-
- hd_name_eq(name, namelen, STRCONST("Content-Length:")))
- ;
- else if(data->state.aptr.te &&
-
- hd_name_eq(name, namelen, STRCONST("Connection:")))
- ;
- else if((conn->httpversion >= 20) &&
- hd_name_eq(name, namelen, STRCONST("Transfer-Encoding:")))
-
- ;
- else if((hd_name_eq(name, namelen, STRCONST("Authorization:")) ||
- hd_name_eq(name, namelen, STRCONST("Cookie:"))) &&
-
- !Curl_auth_allowed_to_host(data))
- ;
- else {
- CURLcode result;
- result = Curl_dynhds_add(hds, name, namelen, value, valuelen);
- if(result)
- return result;
- }
- }
- }
- return CURLE_OK;
- }
- CURLcode Curl_http_proxy_get_destination(struct Curl_cfilter *cf,
- const char **phostname,
- int *pport, bool *pipv6_ip)
- {
- DEBUGASSERT(cf);
- DEBUGASSERT(cf->conn);
- if(cf->conn->bits.conn_to_host)
- *phostname = cf->conn->conn_to_host.name;
- else if(cf->sockindex == SECONDARYSOCKET)
- *phostname = cf->conn->secondaryhostname;
- else
- *phostname = cf->conn->host.name;
- if(cf->sockindex == SECONDARYSOCKET)
- *pport = cf->conn->secondary_port;
- else if(cf->conn->bits.conn_to_port)
- *pport = cf->conn->conn_to_port;
- else
- *pport = cf->conn->remote_port;
- if(*phostname != cf->conn->host.name)
- *pipv6_ip = (strchr(*phostname, ':') != NULL);
- else
- *pipv6_ip = cf->conn->bits.ipv6_ip;
- return CURLE_OK;
- }
- CURLcode Curl_http_proxy_create_CONNECT(struct httpreq **preq,
- struct Curl_cfilter *cf,
- struct Curl_easy *data,
- int http_version_major)
- {
- const char *hostname = NULL;
- char *authority = NULL;
- int port;
- bool ipv6_ip;
- CURLcode result;
- struct httpreq *req = NULL;
- result = Curl_http_proxy_get_destination(cf, &hostname, &port, &ipv6_ip);
- if(result)
- goto out;
- authority = aprintf("%s%s%s:%d", ipv6_ip ? "[" : "", hostname,
- ipv6_ip ?"]" : "", port);
- if(!authority) {
- result = CURLE_OUT_OF_MEMORY;
- goto out;
- }
- result = Curl_http_req_make(&req, "CONNECT", sizeof("CONNECT")-1,
- NULL, 0, authority, strlen(authority),
- NULL, 0);
- if(result)
- goto out;
-
- result = Curl_http_output_auth(data, cf->conn, req->method, HTTPREQ_GET,
- req->authority, TRUE);
- if(result)
- goto out;
-
- if(http_version_major == 1 &&
- !Curl_checkProxyheaders(data, cf->conn, STRCONST("Host"))) {
- result = Curl_dynhds_cadd(&req->headers, "Host", authority);
- if(result)
- goto out;
- }
- if(data->state.aptr.proxyuserpwd) {
- result = Curl_dynhds_h1_cadd_line(&req->headers,
- data->state.aptr.proxyuserpwd);
- if(result)
- goto out;
- }
- if(!Curl_checkProxyheaders(data, cf->conn, STRCONST("User-Agent")) &&
- data->set.str[STRING_USERAGENT] && *data->set.str[STRING_USERAGENT]) {
- result = Curl_dynhds_cadd(&req->headers, "User-Agent",
- data->set.str[STRING_USERAGENT]);
- if(result)
- goto out;
- }
- if(http_version_major == 1 &&
- !Curl_checkProxyheaders(data, cf->conn, STRCONST("Proxy-Connection"))) {
- result = Curl_dynhds_cadd(&req->headers, "Proxy-Connection", "Keep-Alive");
- if(result)
- goto out;
- }
- result = dynhds_add_custom(data, TRUE, &req->headers);
- out:
- if(result && req) {
- Curl_http_req_free(req);
- req = NULL;
- }
- free(authority);
- *preq = req;
- return result;
- }
- struct cf_proxy_ctx {
-
- struct Curl_cfilter *cf_protocol;
- };
- static CURLcode http_proxy_cf_connect(struct Curl_cfilter *cf,
- struct Curl_easy *data,
- bool blocking, bool *done)
- {
- struct cf_proxy_ctx *ctx = cf->ctx;
- CURLcode result;
- if(cf->connected) {
- *done = TRUE;
- return CURLE_OK;
- }
- CURL_TRC_CF(data, cf, "connect");
- connect_sub:
- result = cf->next->cft->do_connect(cf->next, data, blocking, done);
- if(result || !*done)
- return result;
- *done = FALSE;
- if(!ctx->cf_protocol) {
- struct Curl_cfilter *cf_protocol = NULL;
- int alpn = Curl_conn_cf_is_ssl(cf->next) ?
- cf->conn->proxy_alpn : CURL_HTTP_VERSION_1_1;
-
- switch(alpn) {
- case CURL_HTTP_VERSION_NONE:
- case CURL_HTTP_VERSION_1_0:
- case CURL_HTTP_VERSION_1_1:
- CURL_TRC_CF(data, cf, "installing subfilter for HTTP/1.1");
- infof(data, "CONNECT tunnel: HTTP/1.%d negotiated",
- (alpn == CURL_HTTP_VERSION_1_0) ? 0 : 1);
- result = Curl_cf_h1_proxy_insert_after(cf, data);
- if(result)
- goto out;
- cf_protocol = cf->next;
- break;
- #ifdef USE_NGHTTP2
- case CURL_HTTP_VERSION_2:
- CURL_TRC_CF(data, cf, "installing subfilter for HTTP/2");
- infof(data, "CONNECT tunnel: HTTP/2 negotiated");
- result = Curl_cf_h2_proxy_insert_after(cf, data);
- if(result)
- goto out;
- cf_protocol = cf->next;
- break;
- #endif
- default:
- infof(data, "CONNECT tunnel: unsupported ALPN(%d) negotiated", alpn);
- result = CURLE_COULDNT_CONNECT;
- goto out;
- }
- ctx->cf_protocol = cf_protocol;
-
- goto connect_sub;
- }
- else {
-
- DEBUGASSERT(ctx->cf_protocol);
- result = CURLE_OK;
- }
- out:
- if(!result) {
- cf->connected = TRUE;
- *done = TRUE;
- }
- return result;
- }
- void Curl_cf_http_proxy_get_host(struct Curl_cfilter *cf,
- struct Curl_easy *data,
- const char **phost,
- const char **pdisplay_host,
- int *pport)
- {
- (void)data;
- if(!cf->connected) {
- *phost = cf->conn->http_proxy.host.name;
- *pdisplay_host = cf->conn->http_proxy.host.dispname;
- *pport = (int)cf->conn->http_proxy.port;
- }
- else {
- cf->next->cft->get_host(cf->next, data, phost, pdisplay_host, pport);
- }
- }
- static void http_proxy_cf_destroy(struct Curl_cfilter *cf,
- struct Curl_easy *data)
- {
- struct cf_proxy_ctx *ctx = cf->ctx;
- (void)data;
- CURL_TRC_CF(data, cf, "destroy");
- free(ctx);
- }
- static void http_proxy_cf_close(struct Curl_cfilter *cf,
- struct Curl_easy *data)
- {
- struct cf_proxy_ctx *ctx = cf->ctx;
- CURL_TRC_CF(data, cf, "close");
- cf->connected = FALSE;
- if(ctx->cf_protocol) {
- struct Curl_cfilter *f;
-
- for(f = cf->next; f; f = f->next) {
- if(f == ctx->cf_protocol) {
-
- Curl_conn_cf_discard_sub(cf, ctx->cf_protocol, data, FALSE);
- break;
- }
- }
- ctx->cf_protocol = NULL;
- }
- if(cf->next)
- cf->next->cft->do_close(cf->next, data);
- }
- struct Curl_cftype Curl_cft_http_proxy = {
- "HTTP-PROXY",
- CF_TYPE_IP_CONNECT|CF_TYPE_PROXY,
- 0,
- http_proxy_cf_destroy,
- http_proxy_cf_connect,
- http_proxy_cf_close,
- Curl_cf_def_shutdown,
- Curl_cf_http_proxy_get_host,
- Curl_cf_def_adjust_pollset,
- Curl_cf_def_data_pending,
- Curl_cf_def_send,
- Curl_cf_def_recv,
- Curl_cf_def_cntrl,
- Curl_cf_def_conn_is_alive,
- Curl_cf_def_conn_keep_alive,
- Curl_cf_def_query,
- };
- CURLcode Curl_cf_http_proxy_insert_after(struct Curl_cfilter *cf_at,
- struct Curl_easy *data)
- {
- struct Curl_cfilter *cf;
- struct cf_proxy_ctx *ctx = NULL;
- CURLcode result;
- (void)data;
- ctx = calloc(1, sizeof(*ctx));
- if(!ctx) {
- result = CURLE_OUT_OF_MEMORY;
- goto out;
- }
- result = Curl_cf_create(&cf, &Curl_cft_http_proxy, ctx);
- if(result)
- goto out;
- ctx = NULL;
- Curl_conn_cf_insert_after(cf_at, cf);
- out:
- free(ctx);
- return result;
- }
- #endif
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