/* * gg_watch_fd() * * funkcja, któr± nale¿y wywo³aæ, gdy co¶ siê stanie z obserwowanym * deskryptorem. zwraca klientowi informacjê o tym, co siê dzieje. * * - sess - opis sesji * * wska¼nik do struktury gg_event, któr± trzeba zwolniæ pó¼niej * za pomoc± gg_event_free(). jesli rodzaj zdarzenia jest równy * GG_EVENT_NONE, nale¿y je zignorowaæ. je¶li zwróci³o NULL, * sta³o siê co¶ niedobrego -- albo zabrak³o pamiêci albo zerwa³o * po³±czenie. */ struct gg_event *gg_watch_fd(struct gg_session *sess) { struct gg_event *e; int res = 0; int port = 0; int errno2 = 0; gg_debug(GG_DEBUG_FUNCTION, "** gg_watch_fd(%p);\n", sess); if (!sess) { errno = EFAULT; return NULL; } if (!(e = (void*) calloc(1, sizeof(*e)))) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() not enough memory for event data\n"); return NULL; } e->type = GG_EVENT_NONE; switch (sess->state) { case GG_STATE_RESOLVING: { struct in_addr addr; int failed = 0; gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_RESOLVING\n"); if (read(sess->fd, &addr, sizeof(addr)) < (signed)sizeof(addr) || addr.s_addr == INADDR_NONE) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() resolving failed\n"); failed = 1; errno2 = errno; } close(sess->fd); sess->fd = -1; #ifndef __GG_LIBGADU_HAVE_PTHREAD waitpid(sess->pid, NULL, 0); sess->pid = -1; #else if (sess->resolver) { gg_resolve_pthread_cleanup(sess->resolver, 0); sess->resolver = NULL; } #endif if (failed) { errno = errno2; goto fail_resolving; } /* je¶li jeste¶my w resolverze i mamy ustawiony port * proxy, znaczy, ¿e resolvowali¶my proxy. zatem * wpiszmy jego adres. */ if (sess->proxy_port) sess->proxy_addr = addr.s_addr; /* zapiszmy sobie adres huba i adres serwera (do * bezpo¶redniego po³±czenia, je¶li hub le¿y) * z resolvera. */ if (sess->proxy_addr && sess->proxy_port) port = sess->proxy_port; else { sess->server_addr = sess->hub_addr = addr.s_addr; port = GG_APPMSG_PORT; } gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() resolved, connecting to %s:%d\n", inet_ntoa(addr), port); /* ³±czymy siê albo z hubem, albo z proxy, zale¿nie * od tego, co resolvowali¶my. */ if ((sess->fd = gg_connect(&addr, port, sess->async)) == -1) { /* je¶li w trybie asynchronicznym gg_connect() * zwróci b³±d, nie ma sensu próbowaæ dalej. */ gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s), critical\n", errno, strerror(errno)); goto fail_connecting; } /* je¶li podano serwer i ³±czmy siê przez proxy, * jest to bezpo¶rednie po³±czenie, inaczej jest * do huba. */ sess->state = (sess->proxy_addr && sess->proxy_port && sess->server_addr) ? GG_STATE_CONNECTING_GG : GG_STATE_CONNECTING_HUB; sess->check = GG_CHECK_WRITE; sess->timeout = GG_DEFAULT_TIMEOUT; break; } case GG_STATE_CONNECTING_HUB: { char buf[1024], *client, *auth; int res = 0, res_size = sizeof(res); const char *host, *appmsg; gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_CONNECTING_HUB\n"); /* je¶li asynchroniczne, sprawdzamy, czy nie wyst±pi³ * przypadkiem jaki¶ b³±d. */ if (sess->async && (getsockopt(sess->fd, SOL_SOCKET, SO_ERROR, &res, &res_size) || res)) { /* no tak, nie uda³o siê po³±czyæ z proxy. nawet * nie próbujemy dalej. */ if (sess->proxy_addr && sess->proxy_port) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection to proxy failed (errno=%d, %s)\n", res, strerror(res)); goto fail_connecting; } gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection to hub failed (errno=%d, %s), trying direct connection\n", res, strerror(res)); close(sess->fd); if ((sess->fd = gg_connect(&sess->hub_addr, GG_DEFAULT_PORT, sess->async)) == -1) { /* przy asynchronicznych, gg_connect() * zwraca -1 przy b³êdach socket(), * ioctl(), braku routingu itd. dlatego * nawet nie próbujemy dalej. */ gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() direct connection failed (errno=%d, %s), critical\n", errno, strerror(errno)); goto fail_connecting; } sess->state = GG_STATE_CONNECTING_GG; sess->check = GG_CHECK_WRITE; sess->timeout = GG_DEFAULT_TIMEOUT; break; } gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connected to hub, sending query\n"); if (!(client = gg_urlencode((sess->client_version) ? sess->client_version : GG_DEFAULT_CLIENT_VERSION))) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() out of memory for client version\n"); goto fail_connecting; } if (!gg_proxy_http_only && sess->proxy_addr && sess->proxy_port) host = "http://" GG_APPMSG_HOST; else host = ""; #ifdef __GG_LIBGADU_HAVE_OPENSSL if (sess->ssl) appmsg = "appmsg3.asp"; else #endif appmsg = "appmsg2.asp"; auth = gg_proxy_auth(); snprintf(buf, sizeof(buf) - 1, "GET %s/appsvc/%s?fmnumber=%u&version=%s&lastmsg=%d HTTP/1.0\r\n" "Host: " GG_APPMSG_HOST "\r\n" "User-Agent: " GG_HTTP_USERAGENT "\r\n" "Pragma: no-cache\r\n" "%s" "\r\n", host, appmsg, sess->uin, client, sess->last_sysmsg, (auth) ? auth : ""); if (auth) free(auth); free(client); /* zwolnij pamiêæ po wersji klienta. */ if (sess->client_version) { free(sess->client_version); sess->client_version = NULL; } gg_debug(GG_DEBUG_MISC, "=> -----BEGIN-HTTP-QUERY-----\n%s\n=> -----END-HTTP-QUERY-----\n", buf); /* zapytanie jest krótkie, wiêc zawsze zmie¶ci siê * do bufora gniazda. je¶li write() zwróci mniej, * sta³o siê co¶ z³ego. */ if (write(sess->fd, buf, strlen(buf)) < (signed)strlen(buf)) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() sending query failed\n"); e->type = GG_EVENT_CONN_FAILED; e->event.failure = GG_FAILURE_WRITING; sess->state = GG_STATE_IDLE; close(sess->fd); sess->fd = -1; break; } sess->state = GG_STATE_READING_DATA; sess->check = GG_CHECK_READ; sess->timeout = GG_DEFAULT_TIMEOUT; break; } case GG_STATE_READING_DATA: { char buf[1024], *tmp, *host; int port = GG_DEFAULT_PORT; struct in_addr addr; gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_READING_DATA\n"); /* czytamy liniê z gniazda i obcinamy \r\n. */ gg_read_line(sess->fd, buf, sizeof(buf) - 1); gg_chomp(buf); gg_debug(GG_DEBUG_TRAFFIC, "// gg_watch_fd() received http header (%s)\n", buf); /* sprawdzamy, czy wszystko w porz±dku. */ if (strncmp(buf, "HTTP/1.", 7) || strncmp(buf + 9, "200", 3)) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() that's not what we've expected, trying direct connection\n"); close(sess->fd); /* je¶li otrzymali¶my jakie¶ dziwne informacje, * próbujemy siê ³±czyæ z pominiêciem huba. */ if (sess->proxy_addr && sess->proxy_port) { if ((sess->fd = gg_connect(&sess->proxy_addr, sess->proxy_port, sess->async)) == -1) { /* trudno. nie wysz³o. */ gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection to proxy failed (errno=%d, %s)\n", errno, strerror(errno)); goto fail_connecting; } sess->state = GG_STATE_CONNECTING_GG; sess->check = GG_CHECK_WRITE; sess->timeout = GG_DEFAULT_TIMEOUT; break; } sess->port = GG_DEFAULT_PORT; /* ³±czymy siê na port 8074 huba. */ if ((sess->fd = gg_connect(&sess->hub_addr, sess->port, sess->async)) == -1) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s), trying https\n", errno, strerror(errno)); sess->port = GG_HTTPS_PORT; /* ³±czymy siê na port 443. */ if ((sess->fd = gg_connect(&sess->hub_addr, sess->port, sess->async)) == -1) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s)\n", errno, strerror(errno)); goto fail_connecting; } } sess->state = GG_STATE_CONNECTING_GG; sess->check = GG_CHECK_WRITE; sess->timeout = GG_DEFAULT_TIMEOUT; break; } /* ignorujemy resztê nag³ówka. */ while (strcmp(buf, "\r\n") && strcmp(buf, "")) gg_read_line(sess->fd, buf, sizeof(buf) - 1); /* czytamy pierwsz± liniê danych. */ gg_read_line(sess->fd, buf, sizeof(buf) - 1); gg_chomp(buf); /* je¶li pierwsza liczba w linii nie jest równa zeru, * oznacza to, ¿e mamy wiadomo¶æ systemow±. */ if (atoi(buf)) { char tmp[1024], *foo, *sysmsg_buf = NULL; int len = 0; while (gg_read_line(sess->fd, tmp, sizeof(tmp) - 1)) { if (!(foo = realloc(sysmsg_buf, len + strlen(tmp) + 2))) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() out of memory for system message, ignoring\n"); break; } sysmsg_buf = foo; if (!len) strcpy(sysmsg_buf, tmp); else strcat(sysmsg_buf, tmp); len += strlen(tmp); } e->type = GG_EVENT_MSG; e->event.msg.msgclass = atoi(buf); e->event.msg.sender = 0; e->event.msg.message = sysmsg_buf; } close(sess->fd); gg_debug(GG_DEBUG_TRAFFIC, "// gg_watch_fd() received http data (%s)\n", buf); /* analizujemy otrzymane dane. */ tmp = buf; while (*tmp && *tmp != ' ') tmp++; while (*tmp && *tmp == ' ') tmp++; host = tmp; while (*tmp && *tmp != ' ') tmp++; *tmp = 0; if ((tmp = strchr(host, ':'))) { *tmp = 0; port = atoi(tmp + 1); } if (!strcmp(host, "notoperating")) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() service unavailable\n", errno, strerror(errno)); sess->fd = -1; goto fail_unavailable; } addr.s_addr = inet_addr(host); sess->server_addr = addr.s_addr; if (!gg_proxy_http_only && sess->proxy_addr && sess->proxy_port) { /* je¶li mamy proxy, ³±czymy siê z nim. */ if ((sess->fd = gg_connect(&sess->proxy_addr, sess->proxy_port, sess->async)) == -1) { /* nie wysz³o? trudno. */ gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection to proxy failed (errno=%d, %s)\n", errno, strerror(errno)); goto fail_connecting; } sess->state = GG_STATE_CONNECTING_GG; sess->check = GG_CHECK_WRITE; sess->timeout = GG_DEFAULT_TIMEOUT; break; } sess->port = port; /* ³±czymy siê z w³a¶ciwym serwerem. */ if ((sess->fd = gg_connect(&addr, sess->port, sess->async)) == -1) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s), trying https\n", errno, strerror(errno)); sess->port = GG_HTTPS_PORT; /* nie wysz³o? próbujemy portu 443. */ if ((sess->fd = gg_connect(&addr, GG_HTTPS_PORT, sess->async)) == -1) { /* ostatnia deska ratunku zawiod³a? * w takim razie zwijamy manatki. */ gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s)\n", errno, strerror(errno)); goto fail_connecting; } } sess->state = GG_STATE_CONNECTING_GG; sess->check = GG_CHECK_WRITE; sess->timeout = GG_DEFAULT_TIMEOUT; break; } case GG_STATE_CONNECTING_GG: { int res = 0, res_size = sizeof(res); gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_CONNECTING_GG\n"); /* je¶li wyst±pi³ b³±d podczas ³±czenia siê... */ if (sess->async && (sess->timeout == 0 || getsockopt(sess->fd, SOL_SOCKET, SO_ERROR, &res, &res_size) || res)) { /* je¶li nie uda³o siê po³±czenie z proxy, * nie mamy czego próbowaæ wiêcej. */ if (sess->proxy_addr && sess->proxy_port) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection to proxy failed (errno=%d, %s)\n", res, strerror(res)); goto fail_connecting; } close(sess->fd); sess->fd = -1; #ifdef ETIMEDOUT if (sess->timeout == 0) errno = ETIMEDOUT; #endif #ifdef __GG_LIBGADU_HAVE_OPENSSL /* je¶li logujemy siê po TLS, nie próbujemy * siê ³±czyæ ju¿ z niczym innym w przypadku * b³êdu. nie do¶æ, ¿e nie ma sensu, to i * trzeba by siê bawiæ w tworzenie na nowo * SSL i SSL_CTX. */ if (sess->ssl) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s)\n", res, strerror(res)); goto fail_connecting; } #endif gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s), trying https\n", res, strerror(res)); sess->port = GG_HTTPS_PORT; /* próbujemy na port 443. */ if ((sess->fd = gg_connect(&sess->server_addr, sess->port, sess->async)) == -1) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connection failed (errno=%d, %s)\n", errno, strerror(errno)); goto fail_connecting; } } gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() connected\n"); if (gg_proxy_http_only) sess->proxy_port = 0; /* je¶li mamy proxy, wy¶lijmy zapytanie. */ if (sess->proxy_addr && sess->proxy_port) { char buf[100], *auth = gg_proxy_auth(); struct in_addr addr; if (sess->server_addr) addr.s_addr = sess->server_addr; else addr.s_addr = sess->hub_addr; snprintf(buf, sizeof(buf), "CONNECT %s:%d HTTP/1.0\r\n", inet_ntoa(addr), sess->port); gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() proxy request:\n// %s", buf); /* wysy³amy zapytanie. jest ono na tyle krótkie, * ¿e musi siê zmie¶ciæ w buforze gniazda. je¶li * write() zawiedzie, sta³o siê co¶ z³ego. */ if (write(sess->fd, buf, strlen(buf)) < (signed)strlen(buf)) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() can't send proxy request\n"); if (auth) free(auth); goto fail_connecting; } if (auth) { gg_debug(GG_DEBUG_MISC, "// %s", auth); if (write(sess->fd, auth, strlen(auth)) < (signed)strlen(auth)) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() can't send proxy request\n"); free(auth); goto fail_connecting; } free(auth); } if (write(sess->fd, "\r\n", 2) < 2) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() can't send proxy request\n"); goto fail_connecting; } } #ifdef __GG_LIBGADU_HAVE_OPENSSL if (sess->ssl) { SSL_set_fd(sess->ssl, sess->fd); sess->state = GG_STATE_TLS_NEGOTIATION; sess->check = GG_CHECK_WRITE; sess->timeout = GG_DEFAULT_TIMEOUT; break; } #endif sess->state = GG_STATE_READING_KEY; sess->check = GG_CHECK_READ; sess->timeout = GG_DEFAULT_TIMEOUT; break; } #ifdef __GG_LIBGADU_HAVE_OPENSSL case GG_STATE_TLS_NEGOTIATION: { int res; X509 *peer; gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_TLS_NEGOTIATION\n"); if ((res = SSL_connect(sess->ssl)) <= 0) { int err = SSL_get_error(sess->ssl, res); if (res == 0) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() disconnected during TLS negotiation\n"); e->type = GG_EVENT_CONN_FAILED; e->event.failure = GG_FAILURE_TLS; sess->state = GG_STATE_IDLE; close(sess->fd); sess->fd = -1; break; } if (err == SSL_ERROR_WANT_READ) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() SSL_connect() wants to read\n"); sess->state = GG_STATE_TLS_NEGOTIATION; sess->check = GG_CHECK_READ; sess->timeout = GG_DEFAULT_TIMEOUT; break; } else if (err == SSL_ERROR_WANT_WRITE) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() SSL_connect() wants to write\n"); sess->state = GG_STATE_TLS_NEGOTIATION; sess->check = GG_CHECK_WRITE; sess->timeout = GG_DEFAULT_TIMEOUT; break; } else { char buf[1024]; ERR_error_string_n(ERR_get_error(), buf, sizeof(buf)); gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() SSL_connect() bailed out: %s\n", buf); e->type = GG_EVENT_CONN_FAILED; e->event.failure = GG_FAILURE_TLS; sess->state = GG_STATE_IDLE; close(sess->fd); sess->fd = -1; break; } } gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() TLS negotiation succeded:\n// cipher: %s\n", SSL_get_cipher_name(sess->ssl)); peer = SSL_get_peer_certificate(sess->ssl); if (!peer) gg_debug(GG_DEBUG_MISC, "// WARNING! unable to get peer certificate!\n"); else { char buf[1024]; X509_NAME_oneline(X509_get_subject_name(peer), buf, sizeof(buf)); gg_debug(GG_DEBUG_MISC, "// cert subject: %s\n", buf); X509_NAME_oneline(X509_get_issuer_name(peer), buf, sizeof(buf)); gg_debug(GG_DEBUG_MISC, "// cert issuer: %s\n", buf); } sess->state = GG_STATE_READING_KEY; sess->check = GG_CHECK_READ; sess->timeout = GG_DEFAULT_TIMEOUT; break; } #endif case GG_STATE_READING_KEY: { struct gg_header *h; struct gg_welcome *w; struct gg_login60 l; unsigned int hash; unsigned char *password = sess->password; int ret; gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_READING_KEY\n"); memset(&l, 0, sizeof(l)); l.dunno2 = 0xbe; /* XXX bardzo, bardzo, bardzo g³upi pomys³ na pozbycie * siê tekstu wrzucanego przez proxy. */ if (sess->proxy_addr && sess->proxy_port) { char buf[100]; strcpy(buf, ""); gg_read_line(sess->fd, buf, sizeof(buf) - 1); gg_chomp(buf); gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() proxy response:\n// %s\n", buf); while (strcmp(buf, "")) { gg_read_line(sess->fd, buf, sizeof(buf) - 1); gg_chomp(buf); if (strcmp(buf, "")) gg_debug(GG_DEBUG_MISC, "// %s\n", buf); } /* XXX niech czeka jeszcze raz w tej samej * fazie. g³upio, ale dzia³a. */ sess->proxy_port = 0; break; } /* czytaj pierwszy pakiet. */ if (!(h = gg_recv_packet(sess))) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() didn't receive packet (errno=%d, %s)\n", errno, strerror(errno)); e->type = GG_EVENT_CONN_FAILED; e->event.failure = GG_FAILURE_READING; sess->state = GG_STATE_IDLE; errno2 = errno; close(sess->fd); errno = errno2; sess->fd = -1; break; } if (h->type != GG_WELCOME) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() invalid packet received\n"); free(h); close(sess->fd); sess->fd = -1; errno = EINVAL; e->type = GG_EVENT_CONN_FAILED; e->event.failure = GG_FAILURE_INVALID; sess->state = GG_STATE_IDLE; break; } w = (struct gg_welcome*) ((char*) h + sizeof(struct gg_header)); w->key = gg_fix32(w->key); hash = gg_login_hash(password, w->key); gg_debug(GG_DEBUG_DUMP, "// gg_watch_fd() challenge %.4x --> hash %.8x\n", w->key, hash); free(h); free(sess->password); sess->password = NULL; { struct in_addr dcc_ip; dcc_ip.s_addr = gg_dcc_ip; gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() gg_dcc_ip = %s\n", inet_ntoa(dcc_ip)); } if (gg_dcc_ip == (unsigned long) inet_addr("255.255.255.255")) { struct sockaddr_in sin; int sin_len = sizeof(sin); gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() detecting address\n"); if (!getsockname(sess->fd, (struct sockaddr*) &sin, &sin_len)) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() detected address to %s\n", inet_ntoa(sin.sin_addr)); l.local_ip = sin.sin_addr.s_addr; } else { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() unable to detect address\n"); l.local_ip = 0; } } else l.local_ip = gg_dcc_ip; l.uin = gg_fix32(sess->uin); l.hash = gg_fix32(hash); l.status = gg_fix32(sess->initial_status ? sess->initial_status : GG_STATUS_AVAIL); l.version = gg_fix32(sess->protocol_version); l.local_port = gg_fix16(gg_dcc_port); l.image_size = sess->image_size; if (sess->external_addr && sess->external_port > 1023) { l.external_ip = sess->external_addr; l.external_port = gg_fix16(sess->external_port); } gg_debug(GG_DEBUG_TRAFFIC, "// gg_watch_fd() sending GG_LOGIN60 packet\n"); ret = gg_send_packet(sess, GG_LOGIN60, &l, sizeof(l), sess->initial_descr, (sess->initial_descr) ? strlen(sess->initial_descr) : 0, NULL); free(sess->initial_descr); sess->initial_descr = NULL; if (ret == -1) { gg_debug(GG_DEBUG_TRAFFIC, "// gg_watch_fd() sending packet failed. (errno=%d, %s)\n", errno, strerror(errno)); errno2 = errno; close(sess->fd); errno = errno2; sess->fd = -1; e->type = GG_EVENT_CONN_FAILED; e->event.failure = GG_FAILURE_WRITING; sess->state = GG_STATE_IDLE; break; } sess->state = GG_STATE_READING_REPLY; break; } case GG_STATE_READING_REPLY: { struct gg_header *h; gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_READING_REPLY\n"); if (!(h = gg_recv_packet(sess))) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() didn't receive packet (errno=%d, %s)\n", errno, strerror(errno)); e->type = GG_EVENT_CONN_FAILED; e->event.failure = GG_FAILURE_READING; sess->state = GG_STATE_IDLE; errno2 = errno; close(sess->fd); errno = errno2; sess->fd = -1; break; } if (h->type == GG_LOGIN_OK || h->type == GG_NEED_EMAIL) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() login succeded\n"); e->type = GG_EVENT_CONN_SUCCESS; sess->state = GG_STATE_CONNECTED; sess->timeout = -1; sess->status = (sess->initial_status) ? sess->initial_status : GG_STATUS_AVAIL; free(h); break; } if (h->type == GG_LOGIN_FAILED) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() login failed\n"); e->event.failure = GG_FAILURE_PASSWORD; errno = EACCES; } else if (h->type == GG_DISCONNECTING) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() too many incorrect password attempts\n"); e->event.failure = GG_FAILURE_INTRUDER; errno = EACCES; } else { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() invalid packet\n"); e->event.failure = GG_FAILURE_INVALID; errno = EINVAL; } e->type = GG_EVENT_CONN_FAILED; sess->state = GG_STATE_IDLE; errno2 = errno; close(sess->fd); errno = errno2; sess->fd = -1; free(h); break; } case GG_STATE_CONNECTED: { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() GG_STATE_CONNECTED\n"); sess->last_event = time(NULL); if ((res = gg_watch_fd_connected(sess, e)) == -1) { gg_debug(GG_DEBUG_MISC, "// gg_watch_fd() watch_fd_connected failed (errno=%d, %s)\n", errno, strerror(errno)); if (errno == EAGAIN) { e->type = GG_EVENT_NONE; res = 0; } else res = -1; } break; } } done: if (res == -1) { free(e); e = NULL; } return e; fail_connecting: if (sess->fd != -1) { errno2 = errno; close(sess->fd); errno = errno2; sess->fd = -1; } e->type = GG_EVENT_CONN_FAILED; e->event.failure = GG_FAILURE_CONNECTING; sess->state = GG_STATE_IDLE; goto done; fail_resolving: e->type = GG_EVENT_CONN_FAILED; e->event.failure = GG_FAILURE_RESOLVING; sess->state = GG_STATE_IDLE; goto done; fail_unavailable: e->type = GG_EVENT_CONN_FAILED; e->event.failure = GG_FAILURE_UNAVAILABLE; sess->state = GG_STATE_IDLE; goto done; }
/** * Rozpoczyna połączenie HTTP. * * Funkcja przeprowadza połączenie HTTP przy połączeniu synchronicznym, * zwracając wynik w polach struktury \c gg_http, lub błąd, gdy sesja się * nie powiedzie. * * Przy połączeniu asynchronicznym, funkcja rozpoczyna połączenie, a dalsze * etapy będą przeprowadzane po wykryciu zmian (\c watch) na obserwowanym * deskryptorze (\c fd) i wywołaniu funkcji \c gg_http_watch_fd(). * * Po zakończeniu, należy zwolnić strukturę za pomocą funkcji * \c gg_http_free(). Połączenie asynchroniczne można zatrzymać w każdej * chwili za pomocą \c gg_http_stop(). * * \param hostname Adres serwera * \param port Port serwera * \param async Flaga asynchronicznego połączenia * \param method Metoda HTTP * \param path Ścieżka do zasobu (musi być poprzedzona znakiem '/') * \param header Nagłówek zapytania plus ewentualne dane dla POST * * \return Zaalokowana struktura \c gg_http lub NULL, jeśli wystąpił błąd. * * \ingroup http */ struct gg_http *gg_http_connect(const char *hostname, int port, int async, const char *method, const char *path, const char *header) { struct gg_http *h; if (!hostname || !port || !method || !path || !header) { gg_debug(GG_DEBUG_MISC, "// gg_http_connect() invalid arguments\n"); errno = EFAULT; return NULL; } if (!(h = malloc(sizeof(*h)))) return NULL; memset(h, 0, sizeof(*h)); h->async = async; h->port = port; h->fd = -1; h->type = GG_SESSION_HTTP; gg_http_set_resolver(h, GG_RESOLVER_DEFAULT); if (gg_proxy_enabled) { char *auth = gg_proxy_auth(); h->query = gg_saprintf("%s http://%s:%d%s HTTP/1.0\r\n%s%s", method, hostname, port, path, (auth) ? auth : "", header); hostname = gg_proxy_host; h->port = port = gg_proxy_port; free(auth); } else { h->query = gg_saprintf("%s %s HTTP/1.0\r\n%s", method, path, header); } if (!h->query) { gg_debug(GG_DEBUG_MISC, "// gg_http_connect() not enough memory for query\n"); free(h); errno = ENOMEM; return NULL; } gg_debug(GG_DEBUG_MISC, "=> -----BEGIN-HTTP-QUERY-----\n%s\n=> -----END-HTTP-QUERY-----\n", h->query); if (async) { if (h->resolver_start(&h->fd, &h->resolver, hostname) == -1) { gg_debug(GG_DEBUG_MISC, "// gg_http_connect() resolver failed\n"); gg_http_free(h); errno = ENOENT; return NULL; } gg_debug(GG_DEBUG_MISC, "// gg_http_connect() resolver = %p\n", h->resolver); h->state = GG_STATE_RESOLVING; h->check = GG_CHECK_READ; h->timeout = GG_DEFAULT_TIMEOUT; } else { struct in_addr addr; if (gg_gethostbyname(hostname, &addr, 0) == -1) { gg_debug(GG_DEBUG_MISC, "// gg_http_connect() host not found\n"); gg_http_free(h); errno = ENOENT; return NULL; } if (!(h->fd = gg_connect(&addr, port, 0)) == -1) { gg_debug(GG_DEBUG_MISC, "// gg_http_connect() connection failed (errno=%d, %s)\n", errno, strerror(errno)); gg_http_free(h); return NULL; } h->state = GG_STATE_CONNECTING; while (h->state != GG_STATE_ERROR && h->state != GG_STATE_PARSING) { if (gg_http_watch_fd(h) == -1) break; } if (h->state != GG_STATE_PARSING) { gg_debug(GG_DEBUG_MISC, "// gg_http_connect() some strange error\n"); gg_http_free(h); return NULL; } } h->callback = gg_http_watch_fd; h->destroy = gg_http_free; return h; }
/* * gg_http_connect() // funkcja pomocnicza * * rozpoczyna po³±czenie po http. * * - hostname - adres serwera * - port - port serwera * - async - asynchroniczne po³±czenie * - method - metoda http (GET, POST, cokolwiek) * - path - ¶cie¿ka do zasobu (musi byæ poprzedzona ,,/'') * - header - nag³ówek zapytania plus ewentualne dane dla POST * * zaalokowana struct gg_http, któr± po¼niej nale¿y * zwolniæ funkcj± gg_http_free(), albo NULL je¶li wyst±pi³ b³±d. */ struct gg_http *gg_http_connect(const char *hostname, int port, int async, const char *method, const char *path, const char *header) { struct gg_http *h; if (!hostname || !port || !method || !path || !header) { gg_debug(GG_DEBUG_MISC, "// gg_http_connect() invalid arguments\n"); errno = EFAULT; return NULL; } if (!(h = malloc(sizeof(*h)))) return NULL; memset(h, 0, sizeof(*h)); h->async = async; h->port = port; h->fd = -1; h->type = GG_SESSION_HTTP; if (gg_proxy_enabled) { char *auth = gg_proxy_auth(); h->query = gg_saprintf("%s http://%s:%d%s HTTP/1.0\r\n%s%s", method, hostname, port, path, (auth) ? auth : "", header); hostname = gg_proxy_host; h->port = port = gg_proxy_port; if (auth) free(auth); } else { h->query = gg_saprintf("%s %s HTTP/1.0\r\n%s", method, path, header); } if (!h->query) { gg_debug(GG_DEBUG_MISC, "// gg_http_connect() not enough memory for query\n"); free(h); errno = ENOMEM; return NULL; } gg_debug(GG_DEBUG_MISC, "=> -----BEGIN-HTTP-QUERY-----\n%s\n=> -----END-HTTP-QUERY-----\n", h->query); if (async) { #ifndef __GG_LIBGADU_HAVE_PTHREAD if (gg_resolve(&h->fd, &h->pid, hostname)) { #else if (gg_resolve_pthread(&h->fd, &h->resolver, hostname)) { #endif gg_debug(GG_DEBUG_MISC, "// gg_http_connect() resolver failed\n"); gg_http_free(h); errno = ENOENT; return NULL; } gg_debug(GG_DEBUG_MISC, "// gg_http_connect() resolver = %p\n", h->resolver); h->state = GG_STATE_RESOLVING; h->check = GG_CHECK_READ; h->timeout = GG_DEFAULT_TIMEOUT; } else { struct in_addr *hn, a; if (!(hn = gg_gethostbyname(hostname))) { gg_debug(GG_DEBUG_MISC, "// gg_http_connect() host not found\n"); gg_http_free(h); errno = ENOENT; return NULL; } else { a.s_addr = hn->s_addr; free(hn); } if (!(h->fd = gg_connect(&a, port, 0)) == -1) { gg_debug(GG_DEBUG_MISC, "// gg_http_connect() connection failed (errno=%d, %s)\n", errno, strerror(errno)); gg_http_free(h); return NULL; } h->state = GG_STATE_CONNECTING; while (h->state != GG_STATE_ERROR && h->state != GG_STATE_PARSING) { if (gg_http_watch_fd(h) == -1) break; } if (h->state != GG_STATE_PARSING) { gg_debug(GG_DEBUG_MISC, "// gg_http_connect() some strange error\n"); gg_http_free(h); return NULL; } } h->callback = gg_http_watch_fd; h->destroy = gg_http_free; return h; } #define gg_http_error(x) \ close(h->fd); \ h->fd = -1; \ h->state = GG_STATE_ERROR; \ h->error = x; \ return 0; /* * gg_http_watch_fd() * * przy asynchronicznej obs³udze HTTP funkcjê t± nale¿y wywo³aæ, je¶li * zmieni³o siê co¶ na obserwowanym deskryptorze. * * - h - struktura opisuj±ca po³±czenie * * je¶li wszystko posz³o dobrze to 0, inaczej -1. po³±czenie bêdzie * zakoñczone, je¶li h->state == GG_STATE_PARSING. je¶li wyst±pi jaki¶ * b³±d, to bêdzie tam GG_STATE_ERROR i odpowiedni kod b³êdu w h->error. */ int gg_http_watch_fd(struct gg_http *h) { gg_debug(GG_DEBUG_FUNCTION, "** gg_http_watch_fd(%p);\n", h); if (!h) { gg_debug(GG_DEBUG_MISC, "// gg_http_watch_fd() invalid arguments\n"); errno = EFAULT; return -1; } if (h->state == GG_STATE_RESOLVING) { struct in_addr a; gg_debug(GG_DEBUG_MISC, "=> http, resolving done\n"); if (read(h->fd, &a, sizeof(a)) < (signed)sizeof(a) || a.s_addr == INADDR_NONE) { gg_debug(GG_DEBUG_MISC, "=> http, resolver thread failed\n"); gg_http_error(GG_ERROR_RESOLVING); } close(h->fd); h->fd = -1; #ifndef __GG_LIBGADU_HAVE_PTHREAD waitpid(h->pid, NULL, 0); #else if (h->resolver) { gg_resolve_pthread_cleanup(h->resolver, 0); h->resolver = NULL; } #endif gg_debug(GG_DEBUG_MISC, "=> http, connecting to %s:%d\n", inet_ntoa(a), h->port); if ((h->fd = gg_connect(&a, h->port, h->async)) == -1) { gg_debug(GG_DEBUG_MISC, "=> http, connection failed (errno=%d, %s)\n", errno, strerror(errno)); gg_http_error(GG_ERROR_CONNECTING); } h->state = GG_STATE_CONNECTING; h->check = GG_CHECK_WRITE; h->timeout = GG_DEFAULT_TIMEOUT; return 0; } if (h->state == GG_STATE_CONNECTING) { int res = 0; unsigned int res_size = sizeof(res); if (h->async && (getsockopt(h->fd, SOL_SOCKET, SO_ERROR, &res, &res_size) || res)) { gg_debug(GG_DEBUG_MISC, "=> http, async connection failed (errno=%d, %s)\n", (res) ? res : errno , strerror((res) ? res : errno)); close(h->fd); h->fd = -1; h->state = GG_STATE_ERROR; h->error = GG_ERROR_CONNECTING; if (res) errno = res; return 0; } gg_debug(GG_DEBUG_MISC, "=> http, connected, sending request\n"); h->state = GG_STATE_SENDING_QUERY; } if (h->state == GG_STATE_SENDING_QUERY) { int res; if ((res = write(h->fd, h->query, strlen(h->query))) < 1) { gg_debug(GG_DEBUG_MISC, "=> http, write() failed (len=%d, res=%d, errno=%d)\n", strlen(h->query), res, errno); gg_http_error(GG_ERROR_WRITING); } if (res < strlen(h->query)) { gg_debug(GG_DEBUG_MISC, "=> http, partial header sent (led=%d, sent=%d)\n", strlen(h->query), res); memmove(h->query, h->query + res, strlen(h->query) - res + 1); h->state = GG_STATE_SENDING_QUERY; h->check = GG_CHECK_WRITE; h->timeout = GG_DEFAULT_TIMEOUT; } else { gg_debug(GG_DEBUG_MISC, "=> http, request sent (len=%d)\n", strlen(h->query)); free(h->query); h->query = NULL; h->state = GG_STATE_READING_HEADER; h->check = GG_CHECK_READ; h->timeout = GG_DEFAULT_TIMEOUT; } return 0; } if (h->state == GG_STATE_READING_HEADER) { char buf[1024], *tmp; int res; if ((res = read(h->fd, buf, sizeof(buf))) == -1) { gg_debug(GG_DEBUG_MISC, "=> http, reading header failed (errno=%d)\n", errno); if (h->header) { free(h->header); h->header = NULL; } gg_http_error(GG_ERROR_READING); } if (!res) { gg_debug(GG_DEBUG_MISC, "=> http, connection reset by peer\n"); if (h->header) { free(h->header); h->header = NULL; } gg_http_error(GG_ERROR_READING); } gg_debug(GG_DEBUG_MISC, "=> http, read %d bytes of header\n", res); if (!(tmp = realloc(h->header, h->header_size + res + 1))) { gg_debug(GG_DEBUG_MISC, "=> http, not enough memory for header\n"); free(h->header); h->header = NULL; gg_http_error(GG_ERROR_READING); } h->header = tmp; memcpy(h->header + h->header_size, buf, res); h->header_size += res; gg_debug(GG_DEBUG_MISC, "=> http, header_buf=%p, header_size=%d\n", h->header, h->header_size); h->header[h->header_size] = 0; if ((tmp = strstr(h->header, "\r\n\r\n")) || (tmp = strstr(h->header, "\n\n"))) { int sep_len = (*tmp == '\r') ? 4 : 2; unsigned int left; char *line; left = h->header_size - ((long)(tmp) - (long)(h->header) + sep_len); gg_debug(GG_DEBUG_MISC, "=> http, got all header (%d bytes, %d left)\n", h->header_size - left, left); /* HTTP/1.1 200 OK */ if (strlen(h->header) < 16 || strncmp(h->header + 9, "200", 3)) { gg_debug(GG_DEBUG_MISC, "=> -----BEGIN-HTTP-HEADER-----\n%s\n=> -----END-HTTP-HEADER-----\n", h->header); gg_debug(GG_DEBUG_MISC, "=> http, didn't get 200 OK -- no results\n"); free(h->header); h->header = NULL; gg_http_error(GG_ERROR_CONNECTING); } h->body_size = 0; line = h->header; *tmp = 0; gg_debug(GG_DEBUG_MISC, "=> -----BEGIN-HTTP-HEADER-----\n%s\n=> -----END-HTTP-HEADER-----\n", h->header); while (line) { if (!strncasecmp(line, "Content-length: ", 16)) { h->body_size = atoi(line + 16); } line = strchr(line, '\n'); if (line) line++; } if (h->body_size <= 0) { gg_debug(GG_DEBUG_MISC, "=> http, content-length not found\n"); h->body_size = left; } if (left > h->body_size) { gg_debug(GG_DEBUG_MISC, "=> http, oversized reply (%d bytes needed, %d bytes left)\n", h->body_size, left); h->body_size = left; } gg_debug(GG_DEBUG_MISC, "=> http, body_size=%d\n", h->body_size); if (!(h->body = malloc(h->body_size + 1))) { gg_debug(GG_DEBUG_MISC, "=> http, not enough memory (%d bytes for body_buf)\n", h->body_size + 1); free(h->header); h->header = NULL; gg_http_error(GG_ERROR_READING); } if (left) { memcpy(h->body, tmp + sep_len, left); h->body_done = left; } h->body[left] = 0; h->state = GG_STATE_READING_DATA; h->check = GG_CHECK_READ; h->timeout = GG_DEFAULT_TIMEOUT; } return 0; } if (h->state == GG_STATE_READING_DATA) { char buf[1024]; int res; if ((res = read(h->fd, buf, sizeof(buf))) == -1) { gg_debug(GG_DEBUG_MISC, "=> http, reading body failed (errno=%d)\n", errno); if (h->body) { free(h->body); h->body = NULL; } gg_http_error(GG_ERROR_READING); } if (!res) { if (h->body_done >= h->body_size) { gg_debug(GG_DEBUG_MISC, "=> http, we're done, closing socket\n"); h->state = GG_STATE_PARSING; close(h->fd); h->fd = -1; } else { gg_debug(GG_DEBUG_MISC, "=> http, connection closed while reading (have %d, need %d)\n", h->body_done, h->body_size); if (h->body) { free(h->body); h->body = NULL; } gg_http_error(GG_ERROR_READING); } return 0; } gg_debug(GG_DEBUG_MISC, "=> http, read %d bytes of body\n", res); if (h->body_done + res > h->body_size) { char *tmp; gg_debug(GG_DEBUG_MISC, "=> http, too much data (%d bytes, %d needed), enlarging buffer\n", h->body_done + res, h->body_size); if (!(tmp = realloc(h->body, h->body_done + res + 1))) { gg_debug(GG_DEBUG_MISC, "=> http, not enough memory for data (%d needed)\n", h->body_done + res + 1); free(h->body); h->body = NULL; gg_http_error(GG_ERROR_READING); } h->body = tmp; h->body_size = h->body_done + res; } h->body[h->body_done + res] = 0; memcpy(h->body + h->body_done, buf, res); h->body_done += res; gg_debug(GG_DEBUG_MISC, "=> body_done=%d, body_size=%d\n", h->body_done, h->body_size); return 0; } if (h->fd != -1) close(h->fd); h->fd = -1; h->state = GG_STATE_ERROR; h->error = 0; return -1; }