/* v/http.c ** */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "all.h" #include "vere/vere.h" #include #include typedef struct _u3_h2o_serv { h2o_globalconf_t fig_u; // h2o global config h2o_context_t ctx_u; // h2o ctx h2o_accept_ctx_t cep_u; // h2o accept ctx h2o_hostconf_t* hos_u; // h2o host config h2o_handler_t* han_u; // h2o request handler } u3_h2o_serv; static void _proxy_serv_free(u3_prox* lis_u); static void _proxy_serv_close(u3_prox* lis_u); static u3_prox* _proxy_serv_new(u3_http* htp_u, c3_s por_s, c3_o sec); static u3_prox* _proxy_serv_start(u3_prox* lis_u); static void _http_serv_free(u3_http* htp_u); static void _http_serv_start_all(void); static void _http_form_free(void); static const c3_i TCP_BACKLOG = 16; /* _http_vec_to_meth(): convert h2o_iovec_t to meth */ static u3_weak _http_vec_to_meth(h2o_iovec_t vec_u) { return ( 0 == strncmp(vec_u.base, "GET", vec_u.len) ) ? c3__get : ( 0 == strncmp(vec_u.base, "PUT", vec_u.len) ) ? c3__put : ( 0 == strncmp(vec_u.base, "POST", vec_u.len) ) ? c3__post : ( 0 == strncmp(vec_u.base, "HEAD", vec_u.len) ) ? c3__head : ( 0 == strncmp(vec_u.base, "CONNECT", vec_u.len) ) ? c3__conn : ( 0 == strncmp(vec_u.base, "DELETE", vec_u.len) ) ? c3__delt : ( 0 == strncmp(vec_u.base, "OPTIONS", vec_u.len) ) ? c3__opts : ( 0 == strncmp(vec_u.base, "TRACE", vec_u.len) ) ? c3__trac : // TODO ?? // ( 0 == strncmp(vec_u.base, "PATCH", vec_u.len) ) ? c3__patc : u3_none; } /* _http_vec_to_atom(): convert h2o_iovec_t to atom (cord) */ static u3_noun _http_vec_to_atom(h2o_iovec_t vec_u) { return u3i_bytes(vec_u.len, (const c3_y*)vec_u.base); } /* _http_vec_to_octs(): convert h2o_iovec_t to (unit octs) */ static u3_noun _http_vec_to_octs(h2o_iovec_t vec_u) { if ( 0 == vec_u.len ) { return u3_nul; } // XX correct size_t -> atom? return u3nt(u3_nul, u3i_chubs(1, (const c3_d*)&vec_u.len), _http_vec_to_atom(vec_u)); } /* _http_vec_from_octs(): convert (unit octs) to h2o_iovec_t */ static h2o_iovec_t _http_vec_from_octs(u3_noun oct) { if ( u3_nul == oct ) { return h2o_iovec_init(0, 0); } // 2GB max if ( c3n == u3a_is_cat(u3h(u3t(oct))) ) { u3m_bail(c3__fail); } c3_w len_w = u3h(u3t(oct)); c3_y* buf_y = c3_malloc(1 + len_w); buf_y[len_w] = 0; u3r_bytes(0, len_w, buf_y, u3t(u3t(oct))); u3z(oct); return h2o_iovec_init(buf_y, len_w); } /* _http_heds_to_noun(): convert h2o_header_t to (list (pair @t @t)) */ static u3_noun _http_heds_to_noun(h2o_header_t* hed_u, c3_d hed_d) { u3_noun hed = u3_nul; c3_d dex_d = hed_d; h2o_header_t deh_u; while ( 0 < dex_d ) { deh_u = hed_u[--dex_d]; hed = u3nc(u3nc(_http_vec_to_atom(*deh_u.name), _http_vec_to_atom(deh_u.value)), hed); } return hed; } /* _http_heds_free(): free header linked list */ static void _http_heds_free(u3_hhed* hed_u) { while ( hed_u ) { u3_hhed* nex_u = hed_u->nex_u; free(hed_u->nam_c); free(hed_u->val_c); free(hed_u); hed_u = nex_u; } } /* _http_hed_new(): create u3_hhed from nam/val cords */ static u3_hhed* _http_hed_new(u3_atom nam, u3_atom val) { c3_w nam_w = u3r_met(3, nam); c3_w val_w = u3r_met(3, val); u3_hhed* hed_u = c3_malloc(sizeof(*hed_u)); hed_u->nam_c = c3_malloc(1 + nam_w); hed_u->val_c = c3_malloc(1 + val_w); hed_u->nam_c[nam_w] = 0; hed_u->val_c[val_w] = 0; hed_u->nex_u = 0; hed_u->nam_w = nam_w; hed_u->val_w = val_w; u3r_bytes(0, nam_w, (c3_y*)hed_u->nam_c, nam); u3r_bytes(0, val_w, (c3_y*)hed_u->val_c, val); return hed_u; } /* _http_heds_from_noun(): convert (list (pair @t @t)) to u3_hhed */ static u3_hhed* _http_heds_from_noun(u3_noun hed) { u3_noun deh = hed; u3_noun i_hed; u3_hhed* hed_u = 0; while ( u3_nul != hed ) { i_hed = u3h(hed); u3_hhed* nex_u = _http_hed_new(u3h(i_hed), u3t(i_hed)); nex_u->nex_u = hed_u; hed_u = nex_u; hed = u3t(hed); } u3z(deh); return hed_u; } /* _http_req_find(): find http request in connection by sequence. */ static u3_hreq* _http_req_find(u3_hcon* hon_u, c3_w seq_l) { u3_hreq* req_u = hon_u->req_u; // XX glories of linear search // while ( req_u ) { if ( seq_l == req_u->seq_l ) { return req_u; } req_u = req_u->nex_u; } return 0; } /* _http_req_link(): link http request to connection */ static void _http_req_link(u3_hcon* hon_u, u3_hreq* req_u) { req_u->hon_u = hon_u; req_u->seq_l = hon_u->seq_l++; req_u->nex_u = hon_u->req_u; if ( 0 != req_u->nex_u ) { req_u->nex_u->pre_u = req_u; } hon_u->req_u = req_u; } /* _http_req_unlink(): remove http request from connection */ static void _http_req_unlink(u3_hreq* req_u) { if ( 0 != req_u->pre_u ) { req_u->pre_u->nex_u = req_u->nex_u; if ( 0 != req_u->nex_u ) { req_u->nex_u->pre_u = req_u->pre_u; } } else { req_u->hon_u->req_u = req_u->nex_u; if ( 0 != req_u->nex_u ) { req_u->nex_u->pre_u = 0; } } } /* _http_req_to_duct(): translate srv/con/req to duct */ static u3_noun _http_req_to_duct(u3_hreq* req_u) { return u3nt(u3_blip, c3__http, u3nq(u3dc("scot", c3_s2('u','v'), req_u->hon_u->htp_u->sev_l), u3dc("scot", c3_s2('u','d'), req_u->hon_u->coq_l), u3dc("scot", c3_s2('u','d'), req_u->seq_l), u3_nul)); } /* _http_req_kill(): kill http request in %eyre. */ static void _http_req_kill(u3_hreq* req_u) { u3_noun pox = _http_req_to_duct(req_u); u3v_plan(pox, u3nc(c3__thud, u3_nul)); } /* _http_req_done(): request finished, deallocation callback */ static void _http_req_done(void* ptr_v) { u3_hreq* req_u = (u3_hreq*)ptr_v; // client canceled request if ( u3_rsat_plan == req_u->sat_e ) { _http_req_kill(req_u); } if ( 0 != req_u->tim_u ) { uv_close((uv_handle_t*)req_u->tim_u, (uv_close_cb)free); req_u->tim_u = 0; } _http_req_unlink(req_u); } /* _http_req_timer_cb(): request timeout callback */ static void _http_req_timer_cb(uv_timer_t* tim_u) { u3_hreq* req_u = tim_u->data; if ( u3_rsat_plan == req_u->sat_e ) { _http_req_kill(req_u); req_u->sat_e = u3_rsat_ripe; c3_c* msg_c = "gateway timeout"; h2o_send_error_generic(req_u->rec_u, 504, msg_c, msg_c, 0); } } /* _http_req_new(): receive http request. */ static u3_hreq* _http_req_new(u3_hcon* hon_u, h2o_req_t* rec_u) { u3_hreq* req_u = h2o_mem_alloc_shared(&rec_u->pool, sizeof(*req_u), _http_req_done); req_u->rec_u = rec_u; req_u->sat_e = u3_rsat_init; req_u->tim_u = 0; req_u->pre_u = 0; _http_req_link(hon_u, req_u); return req_u; } /* _http_req_dispatch(): dispatch http request to %eyre */ static void _http_req_dispatch(u3_hreq* req_u, u3_noun req) { c3_assert(u3_rsat_init == req_u->sat_e); req_u->sat_e = u3_rsat_plan; u3_noun pox = _http_req_to_duct(req_u); u3_noun typ = _(req_u->hon_u->htp_u->lop) ? c3__chis : c3__this; u3v_plan(pox, u3nq(typ, req_u->hon_u->htp_u->sec, u3nc(c3y, u3i_words(1, &req_u->hon_u->ipf_w)), req)); } typedef struct _u3_hgen { h2o_generator_t neg_u; h2o_iovec_t bod_u; u3_hhed* hed_u; } u3_hgen; /* _http_hgen_dispose(): dispose response generator and buffers */ static void _http_hgen_dispose(void* ptr_v) { u3_hgen* gen_u = (u3_hgen*)ptr_v; _http_heds_free(gen_u->hed_u); free(gen_u->bod_u.base); } /* _http_req_respond(): write httr to h2o_req_t->res and send */ static void _http_req_respond(u3_hreq* req_u, u3_noun sas, u3_noun hed, u3_noun bod) { // XX ideally //c3_assert(u3_rsat_plan == req_u->sat_e); if ( u3_rsat_plan != req_u->sat_e ) { //uL(fprintf(uH, "duplicate response\n")); return; } req_u->sat_e = u3_rsat_ripe; uv_timer_stop(req_u->tim_u); h2o_req_t* rec_u = req_u->rec_u; rec_u->res.status = sas; rec_u->res.reason = (sas < 200) ? "weird" : (sas < 300) ? "ok" : (sas < 400) ? "moved" : (sas < 500) ? "missing" : "hosed"; u3_hhed* hed_u = _http_heds_from_noun(u3k(hed)); u3_hgen* gen_u = h2o_mem_alloc_shared(&rec_u->pool, sizeof(*gen_u), _http_hgen_dispose); gen_u->neg_u = (h2o_generator_t){0, 0}; gen_u->hed_u = hed_u; while ( 0 != hed_u ) { h2o_add_header_by_str(&rec_u->pool, &rec_u->res.headers, hed_u->nam_c, hed_u->nam_w, 0, 0, hed_u->val_c, hed_u->val_w); hed_u = hed_u->nex_u; } gen_u->bod_u = _http_vec_from_octs(u3k(bod)); rec_u->res.content_length = gen_u->bod_u.len; h2o_start_response(rec_u, &gen_u->neg_u); h2o_send(rec_u, &gen_u->bod_u, 1, H2O_SEND_STATE_FINAL); { u3_h2o_serv* h2o_u = req_u->hon_u->htp_u->h2o_u; if ( 0 != h2o_u->ctx_u.shutdown_requested ) { rec_u->http1_is_persistent = 0; } } u3z(sas); u3z(hed); u3z(bod); } /* _http_rec_to_httq(): convert h2o_req_t to httq */ static u3_weak _http_rec_to_httq(h2o_req_t* rec_u) { u3_noun med = _http_vec_to_meth(rec_u->method); if ( u3_none == med ) { return u3_none; } u3_noun url = _http_vec_to_atom(rec_u->path); u3_noun hed = _http_heds_to_noun(rec_u->headers.entries, rec_u->headers.size); // restore host header hed = u3nc(u3nc(u3i_string("host"), _http_vec_to_atom(rec_u->authority)), hed); u3_noun bod = _http_vec_to_octs(rec_u->entity); return u3nq(med, url, hed, bod); } typedef struct _h2o_uv_sock { // see private st_h2o_uv_socket_t h2o_socket_t sok_u; // socket uv_stream_t* han_u; // client stream handler (u3_hcon) } h2o_uv_sock; /* _http_rec_accept(); handle incoming http request from h2o. */ static c3_i _http_rec_accept(h2o_handler_t* han_u, h2o_req_t* rec_u) { u3_weak req = _http_rec_to_httq(rec_u); if ( u3_none == req ) { if ( (u3C.wag_w & u3o_verbose) ) { uL(fprintf(uH, "strange %.*s request\n", (int)rec_u->method.len, rec_u->method.base)); } c3_c* msg_c = "bad request"; h2o_send_error_generic(rec_u, 400, msg_c, msg_c, 0); } else { u3_lo_open(); h2o_uv_sock* suv_u = (h2o_uv_sock*)rec_u->conn-> callbacks->get_socket(rec_u->conn); u3_hcon* hon_u = (u3_hcon*)suv_u->han_u; // sanity check c3_assert( hon_u->sok_u == &suv_u->sok_u ); u3_hreq* req_u = _http_req_new(hon_u, rec_u); req_u->tim_u = c3_malloc(sizeof(*req_u->tim_u)); req_u->tim_u->data = req_u; uv_timer_init(u3L, req_u->tim_u); uv_timer_start(req_u->tim_u, _http_req_timer_cb, 300 * 1000, 0); _http_req_dispatch(req_u, req); u3_lo_shut(c3y); } return 0; } /* _http_conn_find(): find http connection in server by sequence. */ static u3_hcon* _http_conn_find(u3_http *htp_u, c3_w coq_l) { u3_hcon* hon_u = htp_u->hon_u; // XX glories of linear search // while ( hon_u ) { if ( coq_l == hon_u->coq_l ) { return hon_u; } hon_u = hon_u->nex_u; } return 0; } /* _http_conn_link(): link http request to connection */ static void _http_conn_link(u3_http* htp_u, u3_hcon* hon_u) { hon_u->htp_u = htp_u; hon_u->coq_l = htp_u->coq_l++; hon_u->nex_u = htp_u->hon_u; if ( 0 != hon_u->nex_u ) { hon_u->nex_u->pre_u = hon_u; } htp_u->hon_u = hon_u; } /* _http_conn_unlink(): remove http request from connection */ static void _http_conn_unlink(u3_hcon* hon_u) { if ( 0 != hon_u->pre_u ) { hon_u->pre_u->nex_u = hon_u->nex_u; if ( 0 != hon_u->nex_u ) { hon_u->nex_u->pre_u = hon_u->pre_u; } } else { hon_u->htp_u->hon_u = hon_u->nex_u; if ( 0 != hon_u->nex_u ) { hon_u->nex_u->pre_u = 0; } } } /* _http_conn_free(): free http connection on close. */ static void _http_conn_free(uv_handle_t* han_t) { u3_hcon* hon_u = (u3_hcon*)han_t; u3_http* htp_u = hon_u->htp_u; u3_h2o_serv* h2o_u = htp_u->h2o_u; c3_assert( 0 == hon_u->req_u ); #if 0 { c3_w len_w = 0; u3_hcon* noh_u = htp_u->hon_u; while ( 0 != noh_u ) { len_w++; noh_u = noh_u->nex_u; } uL(fprintf(uH, "http conn free %d of %u server %d\n", hon_u->coq_l, len_w, htp_u->sev_l)); } #endif _http_conn_unlink(hon_u); #if 0 { c3_w len_w = 0; u3_hcon* noh_u = htp_u->hon_u; while ( 0 != noh_u ) { len_w++; noh_u = noh_u->nex_u; } uL(fprintf(uH, "http conn free %u remaining\n", len_w)); } #endif if ( (0 == htp_u->hon_u) && (0 != h2o_u->ctx_u.shutdown_requested) ) { #if 0 uL(fprintf(uH, "http conn free %d free server %d\n", hon_u->coq_l, htp_u->sev_l)); #endif _http_serv_free(htp_u); } free(hon_u); } /* _http_conn_new(): create and accept http connection. */ static u3_hcon* _http_conn_new(u3_http* htp_u) { u3_hcon* hon_u = c3_malloc(sizeof(*hon_u)); hon_u->seq_l = 1; hon_u->ipf_w = 0; hon_u->req_u = 0; hon_u->sok_u = 0; hon_u->con_u = 0; hon_u->pre_u = 0; _http_conn_link(htp_u, hon_u); #if 0 uL(fprintf(uH, "http conn neww %d server %d\n", hon_u->coq_l, htp_u->sev_l)); #endif return hon_u; } /* _http_serv_find(): find http server by sequence. */ static u3_http* _http_serv_find(c3_l sev_l) { u3_http* htp_u = u3_Host.htp_u; // XX glories of linear search // while ( htp_u ) { if ( sev_l == htp_u->sev_l ) { return htp_u; } htp_u = htp_u->nex_u; } return 0; } /* _http_serv_link(): link http server to global state. */ static void _http_serv_link(u3_http* htp_u) { // XX link elsewhere initially, relink on start? if ( 0 != u3_Host.htp_u ) { htp_u->sev_l = 1 + u3_Host.htp_u->sev_l; } else { htp_u->sev_l = u3A->sev_l; } htp_u->nex_u = u3_Host.htp_u; u3_Host.htp_u = htp_u; } /* _http_serv_unlink(): remove http server from global state. */ static void _http_serv_unlink(u3_http* htp_u) { // XX link elsewhere initially, relink on start? if ( u3_Host.htp_u == htp_u ) { u3_Host.htp_u = htp_u->nex_u; } else { u3_http* pre_u = u3_Host.htp_u; // XX glories of linear search // while ( pre_u ) { if ( pre_u->nex_u == htp_u ) { pre_u->nex_u = htp_u->nex_u; } else pre_u = pre_u->nex_u; } } } /* _http_h2o_context_dispose(): h2o_context_dispose, inlined and cleaned up. */ static void _http_h2o_context_dispose(h2o_context_t* ctx) { h2o_globalconf_t *config = ctx->globalconf; size_t i, j; for (i = 0; config->hosts[i] != NULL; ++i) { h2o_hostconf_t *hostconf = config->hosts[i]; for (j = 0; j != hostconf->paths.size; ++j) { h2o_pathconf_t *pathconf = hostconf->paths.entries + j; h2o_context_dispose_pathconf_context(ctx, pathconf); } h2o_context_dispose_pathconf_context(ctx, &hostconf->fallback_path); } free(ctx->_pathconfs_inited.entries); free(ctx->_module_configs); h2o_timeout_dispose(ctx->loop, &ctx->zero_timeout); h2o_timeout_dispose(ctx->loop, &ctx->hundred_ms_timeout); h2o_timeout_dispose(ctx->loop, &ctx->handshake_timeout); h2o_timeout_dispose(ctx->loop, &ctx->http1.req_timeout); h2o_timeout_dispose(ctx->loop, &ctx->http2.idle_timeout); // NOTE: linked in http2/connection, never unlinked h2o_timeout_unlink(&ctx->http2._graceful_shutdown_timeout); h2o_timeout_dispose(ctx->loop, &ctx->http2.graceful_shutdown_timeout); h2o_timeout_dispose(ctx->loop, &ctx->proxy.io_timeout); h2o_timeout_dispose(ctx->loop, &ctx->one_sec_timeout); h2o_filecache_destroy(ctx->filecache); ctx->filecache = NULL; /* clear storage */ for (i = 0; i != ctx->storage.size; ++i) { h2o_context_storage_item_t *item = ctx->storage.entries + i; if (item->dispose != NULL) { item->dispose(item->data); } } free(ctx->storage.entries); h2o_multithread_unregister_receiver(ctx->queue, &ctx->receivers.hostinfo_getaddr); h2o_multithread_destroy_queue(ctx->queue); if (ctx->_timestamp_cache.value != NULL) { h2o_mem_release_shared(ctx->_timestamp_cache.value); } // NOTE: explicit uv_run removed } /* _http_serv_really_free(): free http server. */ static void _http_serv_really_free(u3_http* htp_u) { c3_assert( 0 == htp_u->hon_u ); if ( 0 != htp_u->h2o_u ) { u3_h2o_serv* h2o_u = htp_u->h2o_u; if ( 0 != h2o_u->cep_u.ssl_ctx ) { SSL_CTX_free(h2o_u->cep_u.ssl_ctx); } h2o_config_dispose(&h2o_u->fig_u); // XX h2o_cleanup_thread if not restarting? free(htp_u->h2o_u); htp_u->h2o_u = 0; } _http_serv_unlink(htp_u); free(htp_u); } /* http_serv_free_cb(): timer callback for freeing http server. */ static void http_serv_free_cb(uv_timer_t* tim_u) { u3_http* htp_u = tim_u->data; _http_serv_really_free(htp_u); uv_close((uv_handle_t*)tim_u, (uv_close_cb)free); } /* _http_serv_free(): begin to free http server. */ static void _http_serv_free(u3_http* htp_u) { #if 0 uL(fprintf(uH, "http serv free %d\n", htp_u->sev_l)); #endif c3_assert( 0 == htp_u->hon_u ); if ( 0 == htp_u->h2o_u ) { _http_serv_really_free(htp_u); } else { u3_h2o_serv* h2o_u = htp_u->h2o_u; _http_h2o_context_dispose(&h2o_u->ctx_u); // NOTE: free deferred to allow timers to be closed // this is a heavy-handed workaround for the lack of // close callbacks in h2o_timer_t // it's unpredictable how many event-loop turns will // be required to finish closing the underlying uv_timer_t // and we can't free until that's done (or we have UB) // testing reveals 5s to be a long enough deferral uv_timer_t* tim_u = c3_malloc(sizeof(*tim_u)); tim_u->data = htp_u; uv_timer_init(u3L, tim_u); uv_timer_start(tim_u, http_serv_free_cb, 5000, 0); } } /* _http_serv_close_cb(): http server uv_close callback. */ static void _http_serv_close_cb(uv_handle_t* han_u) { u3_http* htp_u = (u3_http*)han_u; htp_u->liv = c3n; // otherwise freed by the last linked connection if ( 0 == htp_u->hon_u ) { _http_serv_free(htp_u); } // restart if all linked servers have been shutdown { htp_u = u3_Host.htp_u; c3_o res = c3y; while ( 0 != htp_u ) { if ( c3y == htp_u->liv ) { res = c3n; } htp_u = htp_u->nex_u; } if ( (c3y == res) && (0 != u3_Host.fig_u.for_u) ) { _http_serv_start_all(); } } } /* _http_serv_close(): close http server gracefully. */ static void _http_serv_close(u3_http* htp_u) { u3_h2o_serv* h2o_u = htp_u->h2o_u; h2o_context_request_shutdown(&h2o_u->ctx_u); #if 0 uL(fprintf(uH, "http serv close %d %p\n", htp_u->sev_l, &htp_u->wax_u)); #endif uv_close((uv_handle_t*)&htp_u->wax_u, _http_serv_close_cb); if ( 0 != htp_u->rox_u ) { // XX close soft _proxy_serv_close(htp_u->rox_u); htp_u->rox_u = 0; } } /* _http_serv_new(): create new http server. */ static u3_http* _http_serv_new(c3_s por_s, c3_o sec, c3_o lop) { u3_http* htp_u = c3_malloc(sizeof(*htp_u)); htp_u->coq_l = 1; htp_u->por_s = por_s; htp_u->sec = sec; htp_u->lop = lop; htp_u->liv = c3y; htp_u->h2o_u = 0; htp_u->rox_u = 0; htp_u->hon_u = 0; htp_u->nex_u = 0; _http_serv_link(htp_u); return htp_u; } /* _http_serv_accept(): accept new http connection. */ static void _http_serv_accept(u3_http* htp_u) { u3_hcon* hon_u = _http_conn_new(htp_u); uv_tcp_init(u3L, &hon_u->wax_u); c3_i sas_i; if ( 0 != (sas_i = uv_accept((uv_stream_t*)&htp_u->wax_u, (uv_stream_t*)&hon_u->wax_u)) ) { if ( (u3C.wag_w & u3o_verbose) ) { uL(fprintf(uH, "http: accept: %s\n", uv_strerror(sas_i))); } uv_close((uv_handle_t*)&hon_u->wax_u, _http_conn_free); return; } hon_u->sok_u = h2o_uv_socket_create((uv_stream_t*)&hon_u->wax_u, _http_conn_free); h2o_accept(&((u3_h2o_serv*)htp_u->h2o_u)->cep_u, hon_u->sok_u); // capture h2o connection (XX fragile) hon_u->con_u = (h2o_conn_t*)hon_u->sok_u->data; struct sockaddr_in adr_u; h2o_socket_getpeername(hon_u->sok_u, (struct sockaddr*)&adr_u); hon_u->ipf_w = ( adr_u.sin_family != AF_INET ) ? 0 : ntohl(adr_u.sin_addr.s_addr); } /* _http_serv_listen_cb(): uv_connection_cb for uv_listen */ static void _http_serv_listen_cb(uv_stream_t* str_u, c3_i sas_i) { u3_http* htp_u = (u3_http*)str_u; if ( 0 != sas_i ) { uL(fprintf(uH, "http: listen_cb: %s\n", uv_strerror(sas_i))); } else { _http_serv_accept(htp_u); } } /* _http_serv_init_h2o(): initialize h2o ctx and handlers for server. */ static u3_h2o_serv* _http_serv_init_h2o(SSL_CTX* tls_u, c3_o log, c3_o red) { u3_h2o_serv* h2o_u = c3_calloc(sizeof(*h2o_u)); h2o_config_init(&h2o_u->fig_u); h2o_u->fig_u.server_name = h2o_iovec_init( H2O_STRLIT("urbit/vere-" URBIT_VERSION)); // XX default pending vhost/custom-domain design // XX revisit the effect of specifying the port h2o_u->hos_u = h2o_config_register_host(&h2o_u->fig_u, h2o_iovec_init(H2O_STRLIT("default")), 65535); h2o_u->cep_u.ctx = (h2o_context_t*)&h2o_u->ctx_u; h2o_u->cep_u.hosts = h2o_u->fig_u.hosts; h2o_u->cep_u.ssl_ctx = tls_u; h2o_u->han_u = h2o_create_handler(&h2o_u->hos_u->fallback_path, sizeof(*h2o_u->han_u)); if ( c3y == red ) { // XX h2o_redirect_register h2o_u->han_u->on_req = _http_rec_accept; } else { h2o_u->han_u->on_req = _http_rec_accept; } if ( c3y == log ) { // XX move this to post serv_start and put the port in the name #if 0 c3_c* pax_c = u3_Host.dir_c; u3_noun now = u3dc("scot", c3__da, u3k(u3A->now)); c3_c* now_c = u3r_string(now); c3_c* nam_c = ".access.log"; c3_w len_w = 1 + strlen(pax_c) + 1 + strlen(now_c) + strlen(nam_c); c3_c* paf_c = c3_malloc(len_w); snprintf(paf_c, len_w, "%s/%s%s", pax_c, now_c, nam_c); h2o_access_log_filehandle_t* fil_u = h2o_access_log_open_handle(paf_c, 0, H2O_LOGCONF_ESCAPE_APACHE); h2o_access_log_register(&h2o_u->hos_u->fallback_path, fil_u); free(paf_c); free(now_c); u3z(now); #endif } // XX h2o_compress_register h2o_context_init(&h2o_u->ctx_u, u3L, &h2o_u->fig_u); return h2o_u; } /* _http_serv_start(): start http server. */ static void _http_serv_start(u3_http* htp_u) { struct sockaddr_in adr_u; memset(&adr_u, 0, sizeof(adr_u)); adr_u.sin_family = AF_INET; adr_u.sin_addr.s_addr = ( c3y == htp_u->lop ) ? htonl(INADDR_LOOPBACK) : INADDR_ANY; uv_tcp_init(u3L, &htp_u->wax_u); /* Try ascending ports. */ while ( 1 ) { c3_i sas_i; adr_u.sin_port = htons(htp_u->por_s); if ( 0 != (sas_i = uv_tcp_bind(&htp_u->wax_u, (const struct sockaddr*)&adr_u, 0)) || 0 != (sas_i = uv_listen((uv_stream_t*)&htp_u->wax_u, TCP_BACKLOG, _http_serv_listen_cb)) ) { if ( (UV_EADDRINUSE == sas_i) || (UV_EACCES == sas_i) ) { if ( (c3y == htp_u->sec) && (443 == htp_u->por_s) ) { htp_u->por_s = 8443; } else if ( (c3n == htp_u->sec) && (80 == htp_u->por_s) ) { htp_u->por_s = 8080; } else { htp_u->por_s++; } continue; } uL(fprintf(uH, "http: listen: %s\n", uv_strerror(sas_i))); _http_serv_free(htp_u); if ( 0 != htp_u->rox_u ) { _proxy_serv_free(htp_u->rox_u); } return; } // XX this is weird if ( 0 != htp_u->rox_u ) { htp_u->rox_u = _proxy_serv_start(htp_u->rox_u); } if ( 0 != htp_u->rox_u ) { uL(fprintf(uH, "http: live (%s, %s) on %d (proxied on %d)\n", (c3y == htp_u->sec) ? "secure" : "insecure", (c3y == htp_u->lop) ? "loopback" : "public", htp_u->por_s, htp_u->rox_u->por_s)); } else { uL(fprintf(uH, "http: live (%s, %s) on %d\n", (c3y == htp_u->sec) ? "secure" : "insecure", (c3y == htp_u->lop) ? "loopback" : "public", htp_u->por_s)); } break; } } //XX deduplicate these with cttp /* _cttp_mcut_char(): measure/cut character. */ static c3_w _cttp_mcut_char(c3_c* buf_c, c3_w len_w, c3_c chr_c) { if ( buf_c ) { buf_c[len_w] = chr_c; } return len_w + 1; } /* _cttp_mcut_cord(): measure/cut cord. */ static c3_w _cttp_mcut_cord(c3_c* buf_c, c3_w len_w, u3_noun san) { c3_w ten_w = u3r_met(3, san); if ( buf_c ) { u3r_bytes(0, ten_w, (c3_y *)(buf_c + len_w), san); } u3z(san); return (len_w + ten_w); } /* _cttp_mcut_path(): measure/cut cord list. */ static c3_w _cttp_mcut_path(c3_c* buf_c, c3_w len_w, c3_c sep_c, u3_noun pax) { u3_noun axp = pax; while ( u3_nul != axp ) { u3_noun h_axp = u3h(axp); len_w = _cttp_mcut_cord(buf_c, len_w, u3k(h_axp)); axp = u3t(axp); if ( u3_nul != axp ) { len_w = _cttp_mcut_char(buf_c, len_w, sep_c); } } u3z(pax); return len_w; } static uv_buf_t _http_wain_to_buf(u3_noun wan) { c3_w len_w = _cttp_mcut_path(0, 0, (c3_c)10, u3k(wan)); c3_c* buf_c = c3_malloc(1 + len_w); _cttp_mcut_path(buf_c, 0, (c3_c)10, wan); buf_c[len_w] = 0; return uv_buf_init(buf_c, len_w); } /* _http_init_tls: initialize OpenSSL context */ static SSL_CTX* _http_init_tls(uv_buf_t key_u, uv_buf_t cer_u) { // XX require 1.1.0 and use TLS_server_method() SSL_CTX* tls_u = SSL_CTX_new(SSLv23_server_method()); // XX use SSL_CTX_set_max_proto_version() and SSL_CTX_set_min_proto_version() SSL_CTX_set_options(tls_u, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | // SSL_OP_NO_TLSv1 | // XX test SSL_OP_NO_COMPRESSION); SSL_CTX_set_default_verify_paths(tls_u); SSL_CTX_set_session_cache_mode(tls_u, SSL_SESS_CACHE_OFF); SSL_CTX_set_cipher_list(tls_u, "ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:" "ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:" "RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS"); // enable ALPN for HTTP 2 support #if H2O_USE_ALPN { SSL_CTX_set_ecdh_auto(tls_u, 1); h2o_ssl_register_alpn_protocols(tls_u, h2o_http2_alpn_protocols); } #endif { BIO* bio_u = BIO_new_mem_buf(key_u.base, key_u.len); EVP_PKEY* pky_u = PEM_read_bio_PrivateKey(bio_u, 0, 0, 0); c3_i sas_i = SSL_CTX_use_PrivateKey(tls_u, pky_u); EVP_PKEY_free(pky_u); BIO_free(bio_u); if( 0 == sas_i ) { uL(fprintf(uH, "http: load private key failed:\n")); ERR_print_errors_fp(uH); uL(1); SSL_CTX_free(tls_u); return 0; } } { BIO* bio_u = BIO_new_mem_buf(cer_u.base, cer_u.len); X509* xer_u = PEM_read_bio_X509_AUX(bio_u, 0, 0, 0); c3_i sas_i = SSL_CTX_use_certificate(tls_u, xer_u); X509_free(xer_u); if( 0 == sas_i ) { uL(fprintf(uH, "http: load certificate failed:\n")); ERR_print_errors_fp(uH); uL(1); BIO_free(bio_u); SSL_CTX_free(tls_u); return 0; } // get any additional CA certs, ignoring errors while ( 0 != (xer_u = PEM_read_bio_X509(bio_u, 0, 0, 0)) ) { // XX require 1.0.2 or newer and use SSL_CTX_add0_chain_cert SSL_CTX_add_extra_chain_cert(tls_u, xer_u); } BIO_free(bio_u); } return tls_u; } /* _http_write_ports_file(): update .http.ports */ static void _http_write_ports_file(c3_c *pax_c) { c3_c* nam_c = ".http.ports"; c3_w len_w = 1 + strlen(pax_c) + 1 + strlen(nam_c); c3_c* paf_c = c3_malloc(len_w); snprintf(paf_c, len_w, "%s/%s", pax_c, nam_c); c3_i por_i = open(paf_c, O_WRONLY | O_CREAT | O_TRUNC, 0666); free(paf_c); u3_http* htp_u = u3_Host.htp_u; while ( 0 != htp_u ) { // XX write proxy ports instead? if ( 0 < htp_u->por_s ) { dprintf(por_i, "%u %s %s\n", htp_u->por_s, (c3y == htp_u->sec) ? "secure" : "insecure", (c3y == htp_u->lop) ? "loopback" : "public"); } htp_u = htp_u->nex_u; } c3_sync(por_i); close(por_i); } /* _http_release_ports_file(): remove .http.ports */ static void _http_release_ports_file(c3_c *pax_c) { c3_c* nam_c = ".http.ports"; c3_w len_w = 1 + strlen(pax_c) + 1 + strlen(nam_c); c3_c* paf_c = c3_malloc(len_w); snprintf(paf_c, len_w, "%s/%s", pax_c, nam_c); unlink(paf_c); free(paf_c); } /* _http_czar_host(): galaxy hostname as (unit host:eyre) */ static u3_noun _http_czar_host(void) { u3_noun dom = u3_nul; return dom; // XX revisit #if 0 if ( (0 == u3_Host.ops_u.imp_c) || (c3n == u3_Host.ops_u.net) ) { return dom; } { c3_c* dns_c = u3_Host.ops_u.dns_c; c3_w len_w = strlen(dns_c); c3_w dif_w; c3_c* dom_c; c3_c* dot_c; while ( 0 != len_w ) { if ( 0 == (dot_c = strchr(dns_c, '.'))) { len_w = 0; dom = u3nc(u3i_string(dns_c), dom); break; } else { dif_w = dot_c - dns_c; dom_c = c3_malloc(1 + dif_w); strncpy(dom_c, dns_c, dif_w); dom_c[dif_w] = 0; dom = u3nc(u3i_string(dom_c), dom); // increment to skip leading '.' dns_c = dot_c + 1; free(dom_c); // XX confirm that underflow is impossible here len_w -= c3_min(dif_w, len_w); } } } if ( u3_nul == dom ) { return dom; } // increment to skip '~' dom = u3nc(u3i_string(u3_Host.ops_u.imp_c + 1), u3kb_flop(u3k(dom))); return u3nt(u3_nul, c3y, u3kb_flop(u3k(dom))); #endif } /* u3_http_ef_bake(): notify %eyre that we're live */ void u3_http_ef_bake(void) { u3_noun ipf = u3_nul; { struct ifaddrs* iad_u; getifaddrs(&iad_u); struct ifaddrs* dia_u = iad_u; while ( iad_u ) { struct sockaddr_in* adr_u = (struct sockaddr_in *)iad_u->ifa_addr; if ( (0 != adr_u) && (AF_INET == adr_u->sin_family) ) { c3_w ipf_w = ntohl(adr_u->sin_addr.s_addr); if ( INADDR_LOOPBACK != ipf_w ) { ipf = u3nc(u3nc(c3n, u3i_words(1, &ipf_w)), ipf); } } iad_u = iad_u->ifa_next; } freeifaddrs(dia_u); } u3_noun hot = _http_czar_host(); if ( u3_nul != hot ) { ipf = u3nc(u3k(u3t(hot)), ipf); u3z(hot); } u3_noun pax = u3nq(u3_blip, c3__http, u3k(u3A->sen), u3_nul); u3v_plan(pax, u3nc(c3__born, ipf)); } /* u3_http_ef_thou(): send %thou from %eyre as http response. */ void u3_http_ef_thou(c3_l sev_l, c3_l coq_l, c3_l seq_l, u3_noun rep) { u3_http* htp_u; u3_hcon* hon_u; u3_hreq* req_u; c3_w bug_w = u3C.wag_w & u3o_verbose; if ( !(htp_u = _http_serv_find(sev_l)) ) { if ( bug_w ) { uL(fprintf(uH, "http: server not found: %x\r\n", sev_l)); } } else if ( !(hon_u = _http_conn_find(htp_u, coq_l)) ) { if ( bug_w ) { uL(fprintf(uH, "http: connection not found: %x/%d\r\n", sev_l, coq_l)); } } else if ( !(req_u = _http_req_find(hon_u, seq_l)) ) { if ( bug_w ) { uL(fprintf(uH, "http: request not found: %x/%d/%d\r\n", sev_l, coq_l, seq_l)); } } else { u3_noun p_rep, q_rep, r_rep; if ( c3n == u3r_trel(rep, &p_rep, &q_rep, &r_rep) ) { uL(fprintf(uH, "http: strange response\n")); } else { _http_req_respond(req_u, u3k(p_rep), u3k(q_rep), u3k(r_rep)); } } u3z(rep); } /* _http_serv_start_all(): initialize and start servers based on saved config. */ static void _http_serv_start_all(void) { u3_http* htp_u; c3_s por_s; u3_noun sec = u3_nul; u3_noun non = u3_none; u3_form* for_u = u3_Host.fig_u.for_u; c3_assert( 0 != for_u ); // disabled, as this causes a memory leak // u3_lo_open(); // if the SSL_CTX existed, it'll be freed with the servers u3_Host.tls_u = 0; // HTTPS server. if ( (0 != for_u->key_u.base) && (0 != for_u->cer_u.base) ) { u3_Host.tls_u = _http_init_tls(for_u->key_u, for_u->cer_u); // Note: if tls_u is used for additional servers, // its reference count must be incremented with SSL_CTX_up_ref if ( 0 != u3_Host.tls_u ) { por_s = ( c3y == for_u->pro ) ? 8443 : 443; htp_u = _http_serv_new(por_s, c3y, c3n); htp_u->h2o_u = _http_serv_init_h2o(u3_Host.tls_u, for_u->log, for_u->red); if ( c3y == for_u->pro ) { htp_u->rox_u = _proxy_serv_new(htp_u, 443, c3y); } _http_serv_start(htp_u); sec = u3nc(u3_nul, htp_u->por_s); } } // HTTP server. { por_s = ( c3y == for_u->pro ) ? 8080 : 80; htp_u = _http_serv_new(por_s, c3n, c3n); htp_u->h2o_u = _http_serv_init_h2o(0, for_u->log, for_u->red); if ( c3y == for_u->pro ) { htp_u->rox_u = _proxy_serv_new(htp_u, 80, c3n); } _http_serv_start(htp_u); non = htp_u->por_s; } // Loopback server. { por_s = 12321; htp_u = _http_serv_new(por_s, c3n, c3y); htp_u->h2o_u = _http_serv_init_h2o(0, for_u->log, for_u->red); // never proxied _http_serv_start(htp_u); } // send listening ports to %eyre { c3_assert( u3_none != non ); u3_noun pax = u3nq(u3_blip, c3__http, u3k(u3A->sen), u3_nul); u3v_plan(pax, u3nt(c3__live, non, sec)); } _http_write_ports_file(u3_Host.dir_c); _http_form_free(); // disabled, see above // u3_lo_shut(c3y); } /* _http_serv_restart(): gracefully shutdown, then start servers. */ static void _http_serv_restart(void) { u3_http* htp_u = u3_Host.htp_u; if ( 0 == htp_u ) { _http_serv_start_all(); } else { uL(fprintf(uH, "http: restarting servers to apply configuration\n")); while ( 0 != htp_u ) { if ( c3y == htp_u->liv ) { _http_serv_close(htp_u); } htp_u = htp_u->nex_u; } _http_release_ports_file(u3_Host.dir_c); } } /* _http_form_free(): free and unlink saved config. */ static void _http_form_free(void) { u3_form* for_u = u3_Host.fig_u.for_u; if ( 0 == for_u ) { return; } if ( 0 != for_u->key_u.base ) { free(for_u->key_u.base); } if ( 0 != for_u->cer_u.base ) { free(for_u->cer_u.base); } free(for_u); u3_Host.fig_u.for_u = 0; } /* u3_http_ef_form(): apply configuration, restart servers. */ void u3_http_ef_form(u3_noun fig) { u3_noun sec, pro, log, red; if ( (c3n == u3r_qual(fig, &sec, &pro, &log, &red) ) || // confirm sec is a valid (unit ^) !( u3_nul == sec || ( c3y == u3du(sec) && c3y == u3du(u3t(sec)) && u3_nul == u3h(sec) ) ) || // confirm valid flags ("loobeans") !( c3y == pro || c3n == pro ) || !( c3y == log || c3n == log ) || !( c3y == red || c3n == red ) ) { uL(fprintf(uH, "http: form: invalid card\n")); u3z(fig); return; } u3_form* for_u = c3_malloc(sizeof(*for_u)); for_u->pro = (c3_o)pro; for_u->log = (c3_o)log; for_u->red = (c3_o)red; if ( u3_nul != sec ) { u3_noun key = u3h(u3t(sec)); u3_noun cer = u3t(u3t(sec)); for_u->key_u = _http_wain_to_buf(u3k(key)); for_u->cer_u = _http_wain_to_buf(u3k(cer)); } else { for_u->key_u = uv_buf_init(0, 0); for_u->cer_u = uv_buf_init(0, 0); } u3z(fig); _http_form_free(); u3_Host.fig_u.for_u = for_u; _http_serv_restart(); } /* u3_http_io_init(): initialize http I/O. */ void u3_http_io_init(void) { } /* u3_http_io_talk(): start http I/O. */ void u3_http_io_talk(void) { } /* u3_http_io_poll(): poll kernel for http I/O. */ void u3_http_io_poll(void) { } /* u3_http_io_exit(): shut down http. */ void u3_http_io_exit(void) { // Note: nothing in this codepath can print to uH! // it will seriously mess up your terminal // u3_http* htp_u; // for ( htp_u = u3_Host.htp_u; htp_u; htp_u = htp_u->nex_u ) { // _http_serv_close_hard(htp_u); // } // XX close u3_Host.fig_u.cli_u and con_u _http_release_ports_file(u3_Host.dir_c); } /////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////// typedef enum { u3_pars_good = 0, // success u3_pars_fail = 1, // failure u3_pars_moar = 2 // incomplete } u3_proxy_pars; /* _proxy_alloc(): libuv buffer allocator */ static void _proxy_alloc(uv_handle_t* had_u, size_t len_i, uv_buf_t* buf) { // len_i is always 64k, so we're ignoring it // using fixed size 4K buffer for // XX consider h2o_buffer_t, a pool, or something XX void* ptr_v = c3_malloc(4096); *buf = uv_buf_init(ptr_v, 4096); } /* _proxy_warc_link(): link warc to global state. */ static void _proxy_warc_link(u3_warc* cli_u) { cli_u->nex_u = u3_Host.fig_u.cli_u; if ( 0 != cli_u->nex_u ) { cli_u->nex_u->pre_u = cli_u; } u3_Host.fig_u.cli_u = cli_u; } /* _proxy_warc_unlink(): unlink warc from global state. */ static void _proxy_warc_unlink(u3_warc* cli_u) { if ( 0 != cli_u->pre_u ) { cli_u->pre_u->nex_u = cli_u->nex_u; if ( 0 != cli_u->nex_u ) { cli_u->nex_u->pre_u = cli_u->pre_u; } } else { u3_Host.fig_u.cli_u = cli_u->nex_u; if ( 0 != cli_u->nex_u ) { cli_u->nex_u->pre_u = 0; } } } /* _proxy_warc_free(): free ward client */ static void _proxy_warc_free(u3_warc* cli_u) { _proxy_warc_unlink(cli_u); free(cli_u->non_u.base); free(cli_u->hot_c); free(cli_u); } /* _proxy_warc_new(): allocate ship-specific proxy client */ static u3_warc* _proxy_warc_new(u3_http* htp_u, u3_atom sip, c3_s por_s, c3_o sec) { u3_warc* cli_u = c3_malloc(sizeof(*cli_u)); cli_u->htp_u = htp_u; cli_u->por_s = por_s; // XX set here instead of u3_http_ef_that() ? cli_u->non_u = uv_buf_init(0, 0); cli_u->sip = sip; cli_u->sec = sec; // XX set here instead of _proxy_ward_resolve() ? cli_u->hot_c = 0; cli_u->nex_u = 0; cli_u->pre_u = 0; _proxy_warc_link(cli_u); return cli_u; } /* _proxy_conn_link(): link con to listener or global state. */ static void _proxy_conn_link(u3_pcon* con_u) { switch ( con_u->typ_e ) { default: c3_assert(0); case u3_ptyp_ward: { con_u->nex_u = u3_Host.fig_u.con_u; if ( 0 != con_u->nex_u ) { con_u->nex_u->pre_u = con_u; } u3_Host.fig_u.con_u = con_u; break; } case u3_ptyp_prox: { u3_prox* lis_u = con_u->src_u.lis_u; con_u->nex_u = lis_u->con_u; if ( 0 != con_u->nex_u ) { con_u->nex_u->pre_u = con_u; } lis_u->con_u = con_u; break; } } } /* _proxy_conn_unlink(): unlink con from listener or global state. */ static void _proxy_conn_unlink(u3_pcon* con_u) { if ( 0 != con_u->pre_u ) { con_u->pre_u->nex_u = con_u->nex_u; if ( 0 != con_u->nex_u ) { con_u->nex_u->pre_u = con_u->pre_u; } } else { switch ( con_u->typ_e ) { default: c3_assert(0); case u3_ptyp_ward: { u3_Host.fig_u.con_u = con_u->nex_u; if ( 0 != con_u->nex_u ) { con_u->nex_u->pre_u = 0; } break; } case u3_ptyp_prox: { u3_prox* lis_u = con_u->src_u.lis_u; lis_u->con_u = con_u->nex_u; if ( 0 != con_u->nex_u ) { con_u->nex_u->pre_u = 0; } break; } } } } /* _proxy_conn_free(): free proxy connection */ static void _proxy_conn_free(uv_handle_t* han_u) { u3_pcon* con_u = han_u->data; if ( 0 != con_u->buf_u.base ) { free(con_u->buf_u.base); } if ( u3_ptyp_ward == con_u->typ_e ) { _proxy_warc_free(con_u->src_u.cli_u); } _proxy_conn_unlink(con_u); free(con_u); } /* _proxy_conn_close(): close both sides of proxy connection */ static void _proxy_conn_close(u3_pcon* con_u) { // XX revisit, this is called twice when con_u // is a loopback connection and we're restarting if ( uv_is_closing((uv_handle_t*)&con_u->don_u) ){ return; } if ( 0 != con_u->upt_u ) { uv_close((uv_handle_t*)con_u->upt_u, (uv_close_cb)free); } uv_close((uv_handle_t*)&con_u->don_u, _proxy_conn_free); } /* _proxy_conn_new(): allocate proxy connection */ static u3_pcon* _proxy_conn_new(u3_proxy_type typ_e, void* src_u) { u3_pcon* con_u = c3_malloc(sizeof(*con_u)); con_u->upt_u = 0; con_u->buf_u = uv_buf_init(0, 0); con_u->nex_u = 0; con_u->pre_u = 0; switch ( typ_e ) { default: c3_assert(0); case u3_ptyp_prox: { u3_prox* lis_u = (u3_prox*)src_u; con_u->typ_e = typ_e; con_u->src_u.lis_u = lis_u; con_u->sec = lis_u->sec; break; } case u3_ptyp_ward: { u3_warc* cli_u = (u3_warc*)src_u; con_u->typ_e = typ_e; con_u->src_u.cli_u = cli_u; con_u->sec = cli_u->sec; break; } } con_u->don_u.data = con_u; _proxy_conn_link(con_u); return con_u; } /* _proxy_write_cb(): free uv_write_t and linked buffer. */ static void _proxy_write_cb(uv_write_t* wri_u, c3_i sas_i) { if ( 0 != sas_i ) { uL(fprintf(uH, "proxy: write: %s\n", uv_strerror(sas_i))); } if ( 0 != wri_u->data ) { free(wri_u->data); } free(wri_u); } /* _proxy_write(): write buffer to proxy stream */ static c3_i _proxy_write(u3_pcon* con_u, uv_stream_t* str_u, uv_buf_t buf_u) { uv_write_t* wri_u = c3_malloc(sizeof(*wri_u)); wri_u->data = buf_u.base; c3_i sas_i; if ( 0 != (sas_i = uv_write(wri_u, str_u, &buf_u, 1, _proxy_write_cb)) ) { _proxy_conn_close(con_u); _proxy_write_cb(wri_u, sas_i); } return sas_i; } /* _proxy_read_downstream_cb(): read from downstream, write upstream. */ static void _proxy_read_downstream_cb(uv_stream_t* don_u, ssize_t siz_w, const uv_buf_t* buf_u) { u3_pcon* con_u = don_u->data; if ( 0 > siz_w ) { if ( UV_EOF != siz_w ) { uL(fprintf(uH, "proxy: read downstream: %s\n", uv_strerror(siz_w))); } _proxy_conn_close(con_u); } else { _proxy_write(con_u, (uv_stream_t*)con_u->upt_u, uv_buf_init(buf_u->base, siz_w)); } } /* _proxy_read_upstream_cb(): read from upstream, write downstream. */ static void _proxy_read_upstream_cb(uv_stream_t* upt_u, ssize_t siz_w, const uv_buf_t* buf_u) { u3_pcon* con_u = upt_u->data; if ( 0 > siz_w ) { if ( UV_EOF != siz_w ) { uL(fprintf(uH, "proxy: read upstream: %s\n", uv_strerror(siz_w))); } _proxy_conn_close(con_u); } else { _proxy_write(con_u, (uv_stream_t*)&(con_u->don_u), uv_buf_init(buf_u->base, siz_w)); } } /* _proxy_fire(): send pending buffer upstream, setup full duplex. */ static void _proxy_fire(u3_pcon* con_u) { if ( 0 != con_u->buf_u.base ) { uv_buf_t fub_u = con_u->buf_u; con_u->buf_u = uv_buf_init(0, 0); if ( 0 != _proxy_write(con_u, (uv_stream_t*)con_u->upt_u, fub_u) ) { return; } } // XX set cooldown timers to close these? uv_read_start((uv_stream_t*)&con_u->don_u, _proxy_alloc, _proxy_read_downstream_cb); uv_read_start((uv_stream_t*)con_u->upt_u, _proxy_alloc, _proxy_read_upstream_cb); } /* _proxy_loop_connect_cb(): callback for loopback proxy connect. */ static void _proxy_loop_connect_cb(uv_connect_t * upc_u, c3_i sas_i) { u3_pcon* con_u = upc_u->data; if ( 0 != sas_i ) { uL(fprintf(uH, "proxy: connect: %s\n", uv_strerror(sas_i))); _proxy_conn_close(con_u); } else { _proxy_fire(con_u); } free(upc_u); } /* _proxy_loop_connect(): connect to loopback. */ static void _proxy_loop_connect(u3_pcon* con_u) { uv_tcp_t* upt_u = c3_malloc(sizeof(*upt_u)); con_u->upt_u = upt_u; upt_u->data = con_u; uv_tcp_init(u3L, upt_u); struct sockaddr_in lop_u; memset(&lop_u, 0, sizeof(lop_u)); lop_u.sin_family = AF_INET; lop_u.sin_addr.s_addr = htonl(INADDR_LOOPBACK); // get the loopback port from the linked server { u3_http* htp_u; switch ( con_u->typ_e ) { default: c3_assert(0); case u3_ptyp_ward: { htp_u = con_u->src_u.cli_u->htp_u; break; } case u3_ptyp_prox: { htp_u = con_u->src_u.lis_u->htp_u; break; } } // XX make unpossible? c3_assert( (0 != htp_u) && (0 != htp_u->por_s) ); lop_u.sin_port = htons(htp_u->por_s); } uv_connect_t* upc_u = c3_malloc(sizeof(*upc_u)); upc_u->data = con_u; c3_i sas_i; if ( 0 != (sas_i = uv_tcp_connect(upc_u, upt_u, (const struct sockaddr*)&lop_u, _proxy_loop_connect_cb)) ) { uL(fprintf(uH, "proxy: connect: %s\n", uv_strerror(sas_i))); free(upc_u); _proxy_conn_close(con_u); } } /* _proxy_wcon_link(): link wcon to ward. */ static void _proxy_wcon_link(u3_wcon* won_u, u3_ward* rev_u) { won_u->nex_u = rev_u->won_u; rev_u->won_u = won_u; } /* _proxy_wcon_unlink(): unlink wcon from ward. */ static void _proxy_wcon_unlink(u3_wcon* won_u) { u3_ward* rev_u = won_u->rev_u; if ( rev_u->won_u == won_u ) { rev_u->won_u = won_u->nex_u; } else { u3_wcon* pre_u = rev_u->won_u; // XX glories of linear search // while ( 0 != pre_u ) { if ( pre_u->nex_u == won_u ) { pre_u->nex_u = won_u->nex_u; } else pre_u = pre_u->nex_u; } } } /* _proxy_wcon_free(): free ward upstream candidate. */ static void _proxy_wcon_free(uv_handle_t* han_u) { u3_wcon* won_u = han_u->data; // Note: not unlinked here, freed concurrent with u3_ward free(won_u); } /* _proxy_wcon_close(): close ward upstream candidate. */ static void _proxy_wcon_close(u3_wcon* won_u) { uv_read_stop((uv_stream_t*)&won_u->upt_u); uv_close((uv_handle_t*)&won_u->upt_u, _proxy_wcon_free); } /* _proxy_wcon_new(): allocate ward upstream candidate. */ static u3_wcon* _proxy_wcon_new(u3_ward* rev_u) { u3_wcon* won_u = c3_malloc(sizeof(*won_u)); won_u->rev_u = rev_u; won_u->upt_u.data = won_u; _proxy_wcon_link(won_u, rev_u); return won_u; } /* _proxy_ward_link(): link ward to listener. */ static void _proxy_ward_link(u3_pcon* con_u, u3_ward* rev_u) { // XX link also to con_u as upstream? c3_assert( u3_ptyp_prox == con_u->typ_e ); u3_prox* lis_u = con_u->src_u.lis_u; rev_u->nex_u = lis_u->rev_u; if ( 0 != rev_u->nex_u ) { rev_u->nex_u->pre_u = rev_u; } lis_u->rev_u = rev_u; } /* _proxy_ward_unlink(): unlink ward from listener. */ static void _proxy_ward_unlink(u3_ward* rev_u) { if ( 0 != rev_u->pre_u ) { rev_u->pre_u->nex_u = rev_u->nex_u; if ( 0 != rev_u->nex_u ) { rev_u->nex_u->pre_u = rev_u->pre_u; } } else { c3_assert( u3_ptyp_prox == rev_u->con_u->typ_e ); u3_prox* lis_u = rev_u->con_u->src_u.lis_u; lis_u->rev_u = rev_u->nex_u; if ( 0 != rev_u->nex_u ) { rev_u->nex_u->pre_u = 0; } } } /* _proxy_ward_free(): free reverse proxy listener */ static void _proxy_ward_free(uv_handle_t* han_u) { u3_ward* rev_u = han_u->data; u3z(rev_u->sip); _proxy_ward_unlink(rev_u); free(rev_u->non_u.base); free(rev_u); } /* _proxy_ward_close_timer(): close ward timer */ static void _proxy_ward_close_timer(uv_handle_t* han_u) { u3_ward* rev_u = han_u->data; uv_close((uv_handle_t*)&rev_u->tim_u, _proxy_ward_free); } /* _proxy_ward_close(): close ward (ship-specific listener) */ static void _proxy_ward_close(u3_ward* rev_u) { while ( 0 != rev_u->won_u ) { _proxy_wcon_close(rev_u->won_u); rev_u->won_u = rev_u->won_u->nex_u; } uv_close((uv_handle_t*)&rev_u->tcp_u, _proxy_ward_close_timer); } /* _proxy_ward_new(): allocate reverse proxy listener */ static u3_ward* _proxy_ward_new(u3_pcon* con_u, u3_atom sip) { u3_ward* rev_u = c3_malloc(sizeof(*rev_u)); rev_u->tcp_u.data = rev_u; rev_u->tim_u.data = rev_u; rev_u->con_u = con_u; rev_u->sip = sip; rev_u->por_s = 0; // set after opened rev_u->won_u = 0; rev_u->nex_u = 0; rev_u->pre_u = 0; _proxy_ward_link(con_u, rev_u); return rev_u; } /* _proxy_wcon_peek_read_cb(): authenticate connection by checking nonce. */ static void _proxy_wcon_peek_read_cb(uv_stream_t* upt_u, ssize_t siz_w, const uv_buf_t* buf_u) { u3_wcon* won_u = upt_u->data; u3_ward* rev_u = won_u->rev_u; if ( 0 > siz_w ) { if ( UV_EOF != siz_w ) { uL(fprintf(uH, "proxy: ward peek: %s\n", uv_strerror(siz_w))); } _proxy_wcon_close(won_u); } else { uv_read_stop(upt_u); c3_w len_w = rev_u->non_u.len; // XX await further reads if siz_w < len_w ? if ( ((len_w + 1) != siz_w) || (len_w != buf_u->base[0]) || (0 != memcmp(rev_u->non_u.base, buf_u->base + 1, len_w)) ) { uL(fprintf(uH, "proxy: ward auth fail\n")); _proxy_wcon_unlink(won_u); _proxy_wcon_close(won_u); } else { _proxy_wcon_unlink(won_u); u3_pcon* con_u = rev_u->con_u; con_u->upt_u = (uv_tcp_t*)&won_u->upt_u; con_u->upt_u->data = con_u; _proxy_fire(con_u); _proxy_ward_close(rev_u); } } } /* _proxy_wcon_peek(): peek at a new incoming connection */ static void _proxy_wcon_peek(u3_wcon* won_u) { uv_read_start((uv_stream_t*)&won_u->upt_u, _proxy_alloc, _proxy_wcon_peek_read_cb); } /* _proxy_ward_accept(): accept new connection on ward */ static void _proxy_ward_accept(u3_ward* rev_u) { u3_wcon* won_u = _proxy_wcon_new(rev_u); uv_tcp_init(u3L, &won_u->upt_u); c3_i sas_i; if ( 0 != (sas_i = uv_accept((uv_stream_t*)&rev_u->tcp_u, (uv_stream_t*)&won_u->upt_u)) ) { uL(fprintf(uH, "proxy: accept: %s\n", uv_strerror(sas_i))); _proxy_wcon_close(won_u); } else { _proxy_wcon_peek(won_u); } } /* _proxy_ward_listen_cb(): listen callback for ward */ static void _proxy_ward_listen_cb(uv_stream_t* tcp_u, c3_i sas_i) { u3_ward* rev_u = (u3_ward*)tcp_u; if ( 0 != sas_i ) { uL(fprintf(uH, "proxy: ward: %s\n", uv_strerror(sas_i))); } else { _proxy_ward_accept(rev_u); } } /* _proxy_ward_timer_cb(): expiration timer for ward */ static void _proxy_ward_timer_cb(uv_timer_t* tim_u) { u3_ward* rev_u = tim_u->data; if ( 0 != rev_u ) { uL(fprintf(uH, "proxy: ward expired: %d\n", rev_u->por_s)); _proxy_ward_close(rev_u); _proxy_conn_close(rev_u->con_u); } } /* _proxy_ward_plan(): notify ship of new ward */ static void _proxy_ward_plan(u3_ward* rev_u) { // XX confirm duct u3_noun pax = u3nq(u3_blip, c3__http, c3__prox, u3nc(u3k(u3A->sen), u3_nul)); u3_noun wis = u3nc(c3__wise, u3nq(u3k(rev_u->sip), rev_u->por_s, u3k(rev_u->con_u->sec), u3i_words(16, (c3_w*)rev_u->non_u.base))); u3v_plan(pax, wis); } /* _proxy_ward_start(): start ward (ship-specific listener). */ static void _proxy_ward_start(u3_pcon* con_u, u3_noun sip) { u3_ward* rev_u = _proxy_ward_new(con_u, sip); uv_tcp_init(u3L, &rev_u->tcp_u); struct sockaddr_in add_u; c3_i add_i = sizeof(add_u); memset(&add_u, 0, add_i); add_u.sin_family = AF_INET; add_u.sin_addr.s_addr = INADDR_ANY; add_u.sin_port = 0; // first available c3_i sas_i; if ( 0 != (sas_i = uv_tcp_bind(&rev_u->tcp_u, (const struct sockaddr*)&add_u, 0)) || 0 != (sas_i = uv_listen((uv_stream_t*)&rev_u->tcp_u, TCP_BACKLOG, _proxy_ward_listen_cb)) || 0 != (sas_i = uv_tcp_getsockname(&rev_u->tcp_u, (struct sockaddr*)&add_u, &add_i))) { uL(fprintf(uH, "proxy: ward: %s\n", uv_strerror(sas_i))); _proxy_ward_close(rev_u); _proxy_conn_close(con_u); } else { // XX u3_lo_open(); rev_u->por_s = ntohs(add_u.sin_port); { c3_w* non_w = c3_malloc(64); c3_rand(non_w); u3_noun non = u3i_words(16, non_w); c3_w len_w = u3r_met(3, non); rev_u->non_u = uv_buf_init((c3_c*)non_w, len_w); u3z(non); } _proxy_ward_plan(rev_u); uv_timer_init(u3L, &rev_u->tim_u); // XX how long? uv_timer_start(&rev_u->tim_u, _proxy_ward_timer_cb, 300 * 1000, 0); // XX u3_lo_shut(c3y); } } /* _proxy_ward_connect_cb(): ward connection callback */ static void _proxy_ward_connect_cb(uv_connect_t * upc_u, c3_i sas_i) { u3_pcon* con_u = upc_u->data; if ( 0 != sas_i ) { uL(fprintf(uH, "proxy: ward connect: %s\n", uv_strerror(sas_i))); _proxy_conn_close(con_u); } else { // XX can con_u close before the loopback conn is established? _proxy_loop_connect(con_u); u3_warc* cli_u = con_u->src_u.cli_u; // send %that nonce to ward for authentication _proxy_write(con_u, (uv_stream_t*)&(con_u->don_u), cli_u->non_u); cli_u->non_u = uv_buf_init(0, 0); } free(upc_u); } /* _proxy_ward_connect(): connect to remote ward */ static void _proxy_ward_connect(u3_warc* cli_u) { u3_pcon* con_u = _proxy_conn_new(u3_ptyp_ward, cli_u); uv_tcp_init(u3L, &con_u->don_u); struct sockaddr_in add_u; memset(&add_u, 0, sizeof(add_u)); add_u.sin_family = AF_INET; add_u.sin_addr.s_addr = htonl(cli_u->ipf_w); add_u.sin_port = htons(cli_u->por_s); uv_connect_t* upc_u = c3_malloc(sizeof(*upc_u)); upc_u->data = con_u; c3_i sas_i; if ( 0 != (sas_i = uv_tcp_connect(upc_u, &con_u->don_u, (const struct sockaddr*)&add_u, _proxy_ward_connect_cb)) ) { uL(fprintf(uH, "proxy: ward connect: %s\n", uv_strerror(sas_i))); free(upc_u); _proxy_conn_close(con_u); } } /* _proxy_ward_resolve_cb(): ward IP address resolution callback */ static void _proxy_ward_resolve_cb(uv_getaddrinfo_t* adr_u, c3_i sas_i, struct addrinfo* aif_u) { u3_warc* cli_u = adr_u->data; if ( 0 != sas_i ) { uL(fprintf(uH, "proxy: ward: resolve: %s\n", uv_strerror(sas_i))); _proxy_warc_free(cli_u); } else { // XX traverse struct a la _ames_czar_cb cli_u->ipf_w = ntohl(((struct sockaddr_in *)aif_u->ai_addr)->sin_addr.s_addr); _proxy_ward_connect(cli_u); } free(adr_u); uv_freeaddrinfo(aif_u); } /* _proxy_reverse_resolve(): resolve IP address of remote ward */ static void _proxy_ward_resolve(u3_warc* cli_u) { uv_getaddrinfo_t* adr_u = c3_malloc(sizeof(*adr_u)); adr_u->data = cli_u; struct addrinfo hin_u; memset(&hin_u, 0, sizeof(struct addrinfo)); hin_u.ai_family = PF_INET; hin_u.ai_socktype = SOCK_STREAM; hin_u.ai_protocol = IPPROTO_TCP; if ( 0 == cli_u->hot_c ) { // XX revisit c3_assert( 0 != u3_Host.sam_u.dns_c ); u3_noun sip = u3dc("scot", 'p', u3k(cli_u->sip)); c3_c* sip_c = u3r_string(sip); c3_w len_w = 1 + strlen(sip_c) + strlen(u3_Host.sam_u.dns_c); cli_u->hot_c = c3_malloc(len_w); // incremented to skip '~' snprintf(cli_u->hot_c, len_w, "%s.%s", sip_c + 1, u3_Host.sam_u.dns_c); free(sip_c); u3z(sip); } c3_i sas_i; if ( 0 != (sas_i = uv_getaddrinfo(u3L, adr_u, _proxy_ward_resolve_cb, cli_u->hot_c, 0, &hin_u)) ) { uL(fprintf(uH, "proxy: ward: resolve: %s\n", uv_strerror(sas_i))); _proxy_warc_free(cli_u); } } /* _proxy_parse_host(): parse plaintext buffer for Host header */ static u3_proxy_pars _proxy_parse_host(const uv_buf_t* buf_u, c3_c** hot_c) { struct phr_header hed_u[H2O_MAX_HEADERS]; size_t hed_t = H2O_MAX_HEADERS; { // unused c3_i ver_i; const c3_c* met_c; size_t met_t; const c3_c* pat_c; size_t pat_t; size_t len_t = buf_u->len < H2O_MAX_REQLEN ? buf_u->len : H2O_MAX_REQLEN; // XX slowloris? c3_i las_i = 0; c3_i sas_i; sas_i = phr_parse_request(buf_u->base, len_t, &met_c, &met_t, &pat_c, &pat_t, &ver_i, hed_u, &hed_t, las_i); switch ( sas_i ) { case -1: return u3_pars_fail; case -2: return u3_pars_moar; } } const h2o_token_t* tok_t; size_t i; for ( i = 0; i < hed_t; i++ ) { // XX in-place, copy first h2o_strtolower((c3_c*)hed_u[i].name, hed_u[i].name_len); if ( 0 != (tok_t = h2o_lookup_token(hed_u[i].name, hed_u[i].name_len)) ) { if ( tok_t->is_init_header_special && H2O_TOKEN_HOST == tok_t ) { c3_c* val_c; c3_c* por_c; val_c = c3_malloc(1 + hed_u[i].value_len); val_c[hed_u[i].value_len] = 0; memcpy(val_c, hed_u[i].value, hed_u[i].value_len); // 'truncate' by replacing port separator ':' with 0 if ( 0 != (por_c = strchr(val_c, ':')) ) { por_c[0] = 0; } *hot_c = val_c; break; } } } return u3_pars_good; } /* _proxy_parse_sni(): parse clienthello buffer for SNI */ static u3_proxy_pars _proxy_parse_sni(const uv_buf_t* buf_u, c3_c** hot_c) { c3_i sas_i = parse_tls_header((const uint8_t*)buf_u->base, buf_u->len, hot_c); if ( 0 > sas_i ) { switch ( sas_i ) { case -1: return u3_pars_moar; case -2: return u3_pars_good; // SNI not present default: return u3_pars_fail; } } return u3_pars_good; } /* _proxy_parse_ship(): determine destination for proxied request */ static u3_noun _proxy_parse_ship(c3_c* hot_c) { u3_noun sip = u3_nul; c3_c* dom_c; if ( 0 == hot_c ) { return sip; } dom_c = strchr(hot_c, '.'); if ( 0 == dom_c ) { return sip; } // XX revisit c3_assert( 0 != u3_Host.sam_u.dns_c ); c3_w dif_w = dom_c - hot_c; c3_w dns_w = strlen(u3_Host.sam_u.dns_c); if ( (dns_w != strlen(hot_c) - (dif_w + 1)) || (0 != strncmp(dom_c + 1, u3_Host.sam_u.dns_c, dns_w)) ) { return sip; } { c3_c* sip_c = c3_malloc(2 + dif_w); strncpy(sip_c + 1, hot_c, dif_w); sip_c[0] = '~'; sip_c[1 + dif_w] = 0; sip = u3dc("slaw", 'p', u3i_string(sip_c)); free(sip_c); return sip; } } /* _proxy_dest(): proxy to destination */ static void _proxy_dest(u3_pcon* con_u, u3_noun sip) { if ( u3_nul == sip ) { _proxy_loop_connect(con_u); } else { u3_noun hip = u3t(sip); if ( c3y == u3r_sing(u3A->own, hip) ) { _proxy_loop_connect(con_u); } else { // XX check if (sein:title sip) == our // XX check will // XX extract bytes from hip, this could leak _proxy_ward_start(con_u, u3k(hip)); } } u3z(sip); } static void _proxy_peek_read(u3_pcon* con_u); /* _proxy_peek(): peek at proxied request for destination */ static void _proxy_peek(u3_pcon* con_u) { c3_c* hot_c = 0; u3_proxy_pars sat_e = ( c3y == con_u->sec ) ? _proxy_parse_sni(&con_u->buf_u, &hot_c) : _proxy_parse_host(&con_u->buf_u, &hot_c); switch ( sat_e ) { default: c3_assert(0); case u3_pars_fail: { uL(fprintf(uH, "proxy: peek fail\n")); _proxy_conn_close(con_u); break; } case u3_pars_moar: { uL(fprintf(uH, "proxy: peek moar\n")); // XX count retries, fail after some n _proxy_peek_read(con_u); break; } case u3_pars_good: { u3_noun sip = _proxy_parse_ship(hot_c); _proxy_dest(con_u, sip); break; } } if ( 0 != hot_c ) { free(hot_c); } } /* _proxy_peek_read_cb(): read callback for peeking at proxied request */ static void _proxy_peek_read_cb(uv_stream_t* don_u, ssize_t siz_w, const uv_buf_t* buf_u) { u3_pcon* con_u = don_u->data; if ( 0 > siz_w ) { if ( UV_EOF != siz_w ) { uL(fprintf(uH, "proxy: peek: %s\n", uv_strerror(siz_w))); } _proxy_conn_close(con_u); } else { uv_read_stop(don_u); u3_lo_open(); if ( 0 == con_u->buf_u.base ) { con_u->buf_u = uv_buf_init(buf_u->base, siz_w); } else { c3_w len_w = siz_w + con_u->buf_u.len; // XX c3_realloc void* ptr_v = realloc(con_u->buf_u.base, len_w); c3_assert( 0 != ptr_v ); memcpy(ptr_v + con_u->buf_u.len, buf_u->base, siz_w); con_u->buf_u = uv_buf_init(ptr_v, len_w); free(buf_u->base); } _proxy_peek(con_u); u3_lo_shut(c3y); } } /* _proxy_peek_read(): start read to peek at proxied request */ static void _proxy_peek_read(u3_pcon* con_u) { uv_read_start((uv_stream_t*)&con_u->don_u, _proxy_alloc, _proxy_peek_read_cb); } /* _proxy_serv_free(): free proxy listener */ static void _proxy_serv_free(u3_prox* lis_u) { u3_pcon* con_u = lis_u->con_u; while ( con_u ) { _proxy_conn_close(con_u); con_u = con_u->nex_u; } u3_ward* rev_u = lis_u->rev_u; while ( rev_u ) { _proxy_ward_close(rev_u); rev_u = rev_u->nex_u; } // not unlinked here, owned directly by htp_u free(lis_u); } /* _proxy_serv_close(): close proxy listener */ static void _proxy_serv_close(u3_prox* lis_u) { uv_close((uv_handle_t*)&lis_u->sev_u, (uv_close_cb)_proxy_serv_free); } /* _proxy_serv_new(): allocate proxy listener */ static u3_prox* _proxy_serv_new(u3_http* htp_u, c3_s por_s, c3_o sec) { u3_prox* lis_u = c3_malloc(sizeof(*lis_u)); lis_u->sev_u.data = lis_u; lis_u->por_s = por_s; lis_u->sec = sec; lis_u->htp_u = htp_u; lis_u->con_u = 0; lis_u->rev_u = 0; // not linked here, owned directly by htp_u return lis_u; } /* _proxy_serv_accept(): accept new connection. */ static void _proxy_serv_accept(u3_prox* lis_u) { u3_pcon* con_u = _proxy_conn_new(u3_ptyp_prox, lis_u); uv_tcp_init(u3L, &con_u->don_u); c3_i sas_i; if ( 0 != (sas_i = uv_accept((uv_stream_t*)&lis_u->sev_u, (uv_stream_t*)&con_u->don_u)) ) { uL(fprintf(uH, "proxy: accept: %s\n", uv_strerror(sas_i))); _proxy_conn_close(con_u); } else { _proxy_peek_read(con_u); } } /* _proxy_serv_listen_cb(): listen callback for proxy server. */ static void _proxy_serv_listen_cb(uv_stream_t* sev_u, c3_i sas_i) { u3_prox* lis_u = (u3_prox*)sev_u; if ( 0 != sas_i ) { uL(fprintf(uH, "proxy: listen_cb: %s\n", uv_strerror(sas_i))); } else { _proxy_serv_accept(lis_u); } } /* _proxy_serv_start(): start reverse TCP proxy server. */ static u3_prox* _proxy_serv_start(u3_prox* lis_u) { uv_tcp_init(u3L, &lis_u->sev_u); struct sockaddr_in add_u; memset(&add_u, 0, sizeof(add_u)); add_u.sin_family = AF_INET; add_u.sin_addr.s_addr = INADDR_ANY; /* Try ascending ports. */ while ( 1 ) { c3_i sas_i; add_u.sin_port = htons(lis_u->por_s); if ( 0 != (sas_i = uv_tcp_bind(&lis_u->sev_u, (const struct sockaddr*)&add_u, 0)) || 0 != (sas_i = uv_listen((uv_stream_t*)&lis_u->sev_u, TCP_BACKLOG, _proxy_serv_listen_cb)) ) { if ( (UV_EADDRINUSE == sas_i) || (UV_EACCES == sas_i) ) { if ( (c3y == lis_u->sec) && (443 == lis_u->por_s) ) { lis_u->por_s = 9443; } else if ( (c3n == lis_u->sec) && (80 == lis_u->por_s) ) { lis_u->por_s = 9080; } else { lis_u->por_s++; } continue; } uL(fprintf(uH, "proxy: listen: %s\n", uv_strerror(sas_i))); _proxy_serv_free(lis_u); return 0; } return lis_u; } } /* u3_http_ef_that(): reverse proxy requested connection notification. */ void u3_http_ef_that(u3_noun tat) { u3_noun sip, por, sec, non; if ( ( c3n == u3r_qual(tat, &sip, &por, &sec, &non) ) || ( c3n == u3ud(sip) ) || ( c3n == u3a_is_cat(por) ) || !( c3y == sec || c3n == sec ) || ( c3n == u3ud(non) ) ) { uL(fprintf(uH, "http: that: invalid card\n")); u3z(tat); return; } u3_http* htp_u; u3_warc* cli_u; for ( htp_u = u3_Host.htp_u; (0 != htp_u); htp_u = htp_u->nex_u ) { if ( c3n == htp_u->lop && sec == htp_u->sec ) { break; } } if ( 0 == htp_u ) { uL(fprintf(uH, "http: that: no %s server\n", (c3y == sec) ? "secure" : "insecure")); u3z(tat); return; } // XX extract bytes from sip, this could leak cli_u = _proxy_warc_new(htp_u, (u3_atom)sip, (c3_s)por, (c3_o)sec); // XX add to constructor c3_w len_w = u3r_met(3, non); c3_assert( 256 > len_w ); c3_y* non_y = c3_malloc(1 + len_w); non_y[0] = (c3_y)len_w; u3r_bytes(0, len_w, non_y + 1, non); cli_u->non_u = uv_buf_init((c3_c*)non_y, 1 + len_w); if ( c3n == u3_Host.ops_u.net ) { cli_u->ipf_w = INADDR_LOOPBACK; _proxy_ward_connect(cli_u); u3z(tat); return; } _proxy_ward_resolve(cli_u); u3z(tat); }