#include <stdio.h>
#include <ctype.h>
#include <unistd.h>
+#include <stdint.h>
#include <libubox/ustream.h>
#include <libubox/ustream-ssl.h>
#include "uclient-utils.h"
#include "uclient-backend.h"
-static struct ustream_ssl_ctx *ssl_ctx;
+enum auth_type {
+ AUTH_TYPE_UNKNOWN,
+ AUTH_TYPE_NONE,
+ AUTH_TYPE_BASIC,
+ AUTH_TYPE_DIGEST,
+};
enum request_type {
REQ_GET,
struct uclient_http {
struct uclient uc;
+ struct ustream_ssl_ctx *ssl_ctx;
struct ustream *us;
struct ustream_fd ufd;
bool ssl;
bool eof;
+ bool connection_close;
enum request_type req_type;
enum http_state state;
+ enum auth_type auth_type;
+ char *auth_str;
+
long read_chunked;
+ long content_length;
+
+ uint32_t nc;
struct blob_buf headers;
struct blob_buf meta;
return 0;
}
+static void uclient_http_disconnect(struct uclient_http *uh)
+{
+ if (!uh->us)
+ return;
+
+ if (uh->ssl)
+ ustream_free(&uh->ussl.stream);
+ ustream_free(&uh->ufd.stream);
+ close(uh->ufd.fd.fd);
+ uh->us = NULL;
+}
+
+static void uclient_http_free_url_state(struct uclient *cl)
+{
+ struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
+
+ uh->auth_type = AUTH_TYPE_UNKNOWN;
+ free(uh->auth_str);
+ uh->auth_str = NULL;
+ uclient_http_disconnect(uh);
+}
+
static void uclient_notify_eof(struct uclient_http *uh)
{
struct ustream *us = uh->us;
}
uclient_backend_set_eof(&uh->uc);
+
+ if (uh->connection_close)
+ uclient_http_disconnect(uh);
+}
+
+static void uclient_http_reset_state(struct uclient_http *uh)
+{
+ uclient_backend_reset_state(&uh->uc);
+ uh->read_chunked = -1;
+ uh->content_length = -1;
+ uh->eof = false;
+ uh->connection_close = false;
+ uh->state = HTTP_STATE_INIT;
+
+ if (uh->auth_type == AUTH_TYPE_UNKNOWN && !uh->uc.url->auth)
+ uh->auth_type = AUTH_TYPE_NONE;
+}
+
+static void uclient_http_init_request(struct uclient_http *uh)
+{
+ uclient_http_reset_state(uh);
+ blob_buf_init(&uh->meta, 0);
+}
+
+static enum auth_type
+uclient_http_update_auth_type(struct uclient_http *uh)
+{
+ if (!uh->auth_str)
+ return AUTH_TYPE_NONE;
+
+ if (!strncasecmp(uh->auth_str, "basic", 5))
+ return AUTH_TYPE_BASIC;
+
+ if (!strncasecmp(uh->auth_str, "digest", 6))
+ return AUTH_TYPE_DIGEST;
+
+ return AUTH_TYPE_NONE;
}
static void uclient_http_process_headers(struct uclient_http *uh)
{
enum {
HTTP_HDR_TRANSFER_ENCODING,
+ HTTP_HDR_CONNECTION,
+ HTTP_HDR_CONTENT_LENGTH,
+ HTTP_HDR_AUTH,
__HTTP_HDR_MAX,
};
static const struct blobmsg_policy hdr_policy[__HTTP_HDR_MAX] = {
#define hdr(_name) { .name = _name, .type = BLOBMSG_TYPE_STRING }
[HTTP_HDR_TRANSFER_ENCODING] = hdr("transfer-encoding"),
+ [HTTP_HDR_CONNECTION] = hdr("connection"),
+ [HTTP_HDR_CONTENT_LENGTH] = hdr("content-length"),
+ [HTTP_HDR_AUTH] = hdr("www-authenticate"),
#undef hdr
};
struct blob_attr *tb[__HTTP_HDR_MAX];
cur = tb[HTTP_HDR_TRANSFER_ENCODING];
if (cur && strstr(blobmsg_data(cur), "chunked"))
uh->read_chunked = 0;
+
+ cur = tb[HTTP_HDR_CONNECTION];
+ if (cur && strstr(blobmsg_data(cur), "close"))
+ uh->connection_close = true;
+
+ cur = tb[HTTP_HDR_CONTENT_LENGTH];
+ if (cur)
+ uh->content_length = strtoul(blobmsg_data(cur), NULL, 10);
+
+ cur = tb[HTTP_HDR_AUTH];
+ if (cur) {
+ free(uh->auth_str);
+ uh->auth_str = strdup(blobmsg_data(cur));
+ }
+
+ uh->auth_type = uclient_http_update_auth_type(uh);
+}
+
+static void
+uclient_http_add_auth_basic(struct uclient_http *uh)
+{
+ struct uclient_url *url = uh->uc.url;
+ int auth_len = strlen(url->auth);
+ char *auth_buf;
+
+ if (auth_len > 512)
+ return;
+
+ auth_buf = alloca(base64_len(auth_len) + 1);
+ base64_encode(url->auth, auth_len, auth_buf);
+ ustream_printf(uh->us, "Authorization: Basic %s\r\n", auth_buf);
+}
+
+static char *digest_unquote_sep(char **str)
+{
+ char *cur = *str + 1;
+ char *start = cur;
+ char *out;
+
+ if (**str != '"')
+ return NULL;
+
+ out = cur;
+ while (1) {
+ if (!*cur)
+ return NULL;
+
+ if (*cur == '"') {
+ cur++;
+ break;
+ }
+
+ if (*cur == '\\')
+ cur++;
+
+ *(out++) = *(cur++);
+ }
+
+ if (*cur == ',')
+ cur++;
+
+ *out = 0;
+ *str = cur;
+
+ return start;
+}
+
+static bool strmatch(char **str, const char *prefix)
+{
+ int len = strlen(prefix);
+
+ if (strncmp(*str, prefix, len) != 0 || (*str)[len] != '=')
+ return false;
+
+ *str += len + 1;
+ return true;
+}
+
+static void
+get_cnonce(char *dest)
+{
+ uint32_t val = 0;
+ FILE *f;
+
+ f = fopen("/dev/urandom", "r");
+ if (f) {
+ fread(&val, sizeof(val), 1, f);
+ fclose(f);
+ }
+
+ bin_to_hex(dest, &val, sizeof(val));
+}
+
+static void add_field(char **buf, int *ofs, int *len, const char *name, const char *val)
+{
+ int available = *len - *ofs;
+ int required;
+ const char *next;
+ char *cur;
+
+ if (*len && !*buf)
+ return;
+
+ required = strlen(name) + 4 + strlen(val) * 2;
+ if (required > available)
+ *len += required - available + 64;
+
+ *buf = realloc(*buf, *len);
+ if (!*buf)
+ return;
+
+ cur = *buf + *ofs;
+ cur += sprintf(cur, ", %s=\"", name);
+
+ while ((next = strchr(val, '"'))) {
+ if (next > val) {
+ memcpy(cur, val, next - val);
+ cur += next - val;
+ }
+
+ cur += sprintf(cur, "\\\"");
+ val = next + 1;
+ }
+
+ cur += sprintf(cur, "%s\"", val);
+ *ofs = cur - *buf;
+}
+
+static void
+uclient_http_add_auth_digest(struct uclient_http *uh)
+{
+ struct uclient_url *url = uh->uc.url;
+ const char *realm = NULL, *opaque = NULL;
+ const char *user, *password;
+ char *buf, *next;
+ int len, ofs;
+
+ char cnonce_str[9];
+ char nc_str[9];
+ char ahash[33];
+ char hash[33];
+
+ struct http_digest_data data = {
+ .nc = nc_str,
+ .cnonce = cnonce_str,
+ .auth_hash = ahash,
+ };
+
+ len = strlen(uh->auth_str) + 1;
+ if (len > 512)
+ return;
+
+ buf = alloca(len);
+ strcpy(buf, uh->auth_str);
+
+ /* skip auth type */
+ strsep(&buf, " ");
+
+ next = buf;
+ while (*next) {
+ const char **dest = NULL;
+
+ while (isspace(*next))
+ next++;
+
+ if (strmatch(&next, "realm"))
+ dest = &realm;
+ else if (strmatch(&next, "qop"))
+ dest = &data.qop;
+ else if (strmatch(&next, "nonce"))
+ dest = &data.nonce;
+ else if (strmatch(&next, "opaque"))
+ dest = &opaque;
+ else
+ return;
+
+ *dest = digest_unquote_sep(&next);
+ }
+
+ if (!realm || !data.qop || !data.nonce)
+ return;
+
+ sprintf(nc_str, "%08x", uh->nc++);
+ get_cnonce(cnonce_str);
+
+ data.qop = "auth";
+ data.uri = url->location;
+ data.method = request_types[uh->req_type];
+
+ password = strchr(url->auth, ':');
+ if (password) {
+ char *user_buf;
+
+ len = password - url->auth;
+ if (len > 256)
+ return;
+
+ user_buf = alloca(len + 1);
+ strncpy(user_buf, url->auth, len);
+ user_buf[len] = 0;
+ user = user_buf;
+ password++;
+ } else {
+ user = url->auth;
+ password = "";
+ }
+
+ http_digest_calculate_auth_hash(ahash, user, realm, password);
+ http_digest_calculate_response(hash, &data);
+
+ buf = NULL;
+ len = 0;
+ ofs = 0;
+
+ add_field(&buf, &ofs, &len, "username", user);
+ add_field(&buf, &ofs, &len, "realm", realm);
+ add_field(&buf, &ofs, &len, "nonce", data.nonce);
+ add_field(&buf, &ofs, &len, "uri", data.uri);
+ add_field(&buf, &ofs, &len, "cnonce", data.cnonce);
+ add_field(&buf, &ofs, &len, "response", hash);
+ if (opaque)
+ add_field(&buf, &ofs, &len, "opaque", opaque);
+
+ ustream_printf(uh->us, "Authorization: Digest nc=%s, qop=%s%s\r\n", data.nc, data.qop, buf);
+ free(buf);
+}
+
+static void
+uclient_http_add_auth_header(struct uclient_http *uh)
+{
+ if (!uh->uc.url->auth)
+ return;
+
+ switch (uh->auth_type) {
+ case AUTH_TYPE_UNKNOWN:
+ case AUTH_TYPE_NONE:
+ break;
+ case AUTH_TYPE_BASIC:
+ uclient_http_add_auth_basic(uh);
+ break;
+ case AUTH_TYPE_DIGEST:
+ uclient_http_add_auth_digest(uh);
+ break;
+ }
+}
+
+static void
+uclient_http_send_headers(struct uclient_http *uh)
+{
+ struct uclient_url *url = uh->uc.url;
+ struct blob_attr *cur;
+ enum request_type req_type = uh->req_type;
+ int rem;
+
+ if (uh->state >= HTTP_STATE_HEADERS_SENT)
+ return;
+
+ if (uh->auth_type == AUTH_TYPE_UNKNOWN)
+ req_type = REQ_HEAD;
+
+ ustream_printf(uh->us,
+ "%s %s HTTP/1.1\r\n"
+ "Host: %s\r\n",
+ request_types[req_type],
+ url->location, url->host);
+
+ blobmsg_for_each_attr(cur, uh->headers.head, rem)
+ ustream_printf(uh->us, "%s: %s\n", blobmsg_name(cur), (char *) blobmsg_data(cur));
+
+ if (uh->req_type == REQ_POST)
+ ustream_printf(uh->us, "Transfer-Encoding: chunked\r\n");
+
+ uclient_http_add_auth_header(uh);
+
+ ustream_printf(uh->us, "\r\n");
+}
+
+static void uclient_http_headers_complete(struct uclient_http *uh)
+{
+ enum auth_type auth_type = uh->auth_type;
+
+ uh->state = HTTP_STATE_RECV_DATA;
+ uh->uc.meta = uh->meta.head;
+ uclient_http_process_headers(uh);
+
+ if (auth_type == AUTH_TYPE_UNKNOWN) {
+ uclient_http_init_request(uh);
+ uclient_http_send_headers(uh);
+ uh->state = HTTP_STATE_REQUEST_DONE;
+ return;
+ }
+
+ if (uh->uc.cb->header_done)
+ uh->uc.cb->header_done(&uh->uc);
+
+ if (uh->req_type == REQ_HEAD) {
+ uh->eof = true;
+ uclient_notify_eof(uh);
+ }
}
static void uclient_parse_http_line(struct uclient_http *uh, char *data)
char *sep;
if (uh->state == HTTP_STATE_REQUEST_DONE) {
+ char *code;
+
+ /* HTTP/1.1 */
+ strsep(&data, " ");
+
+ code = strsep(&data, " ");
+ if (!code)
+ goto error;
+
+ uh->uc.status_code = strtoul(code, &sep, 10);
+ if (sep && *sep)
+ goto error;
+
uh->state = HTTP_STATE_RECV_HEADERS;
return;
}
if (!*data) {
- uh->state = HTTP_STATE_RECV_DATA;
- uh->uc.meta = uh->meta.head;
- uclient_http_process_headers(uh);
- if (uh->uc.cb->header_done)
- uh->uc.cb->header_done(&uh->uc);
+ uclient_http_headers_complete(uh);
return;
}
sep++;
blobmsg_add_string(&uh->meta, name, sep);
+ return;
+
+error:
+ uh->uc.status_code = 400;
+ uh->eof = true;
+ uclient_notify_eof(uh);
}
static void __uclient_notify_read(struct uclient_http *uh)
len -= cur_len;
data = ustream_get_read_buf(uh->us, &len);
- } while (uh->state < HTTP_STATE_RECV_DATA);
+ } while (data && uh->state < HTTP_STATE_RECV_DATA);
if (!len)
return;
if (ret)
return ret;
- if (!ssl_ctx)
- ssl_ctx = ustream_ssl_context_new(false);
+ if (!uh->ssl_ctx)
+ uh->ssl_ctx = ustream_ssl_context_new(false);
us->string_data = true;
us->notify_state = uclient_ssl_notify_state;
us->notify_read = uclient_ssl_notify_read;
- ustream_ssl_init(&uh->ussl, &uh->ufd.stream, ssl_ctx, false);
+ ustream_ssl_init(&uh->ussl, &uh->ufd.stream, uh->ssl_ctx, false);
return 0;
}
-static void uclient_http_disconnect(struct uclient_http *uh)
-{
- uclient_backend_reset_state(&uh->uc);
- uh->read_chunked = -1;
- uh->eof = false;
-
- if (!uh->us)
- return;
-
- if (uh->ssl)
- ustream_free(&uh->ussl.stream);
- ustream_free(&uh->ufd.stream);
- close(uh->ufd.fd.fd);
- uh->us = NULL;
-}
-
static int uclient_http_connect(struct uclient *cl)
{
struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
- uclient_http_disconnect(uh);
- blob_buf_init(&uh->meta, 0);
+ uclient_http_init_request(uh);
+
+ if (uh->us)
+ return 0;
uh->ssl = cl->url->prefix == PREFIX_HTTPS;
- uh->state = HTTP_STATE_INIT;
if (uh->ssl)
return uclient_setup_https(uh);
{
struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
- uclient_http_disconnect(uh);
+ if (uh->ssl_ctx)
+ ustream_ssl_context_free(uh->ssl_ctx);
+
+ uclient_http_free_url_state(cl);
blob_buf_free(&uh->headers);
blob_buf_free(&uh->meta);
free(uh);
return 0;
}
-static void
-uclient_http_send_headers(struct uclient_http *uh)
-{
- struct uclient_url *url = uh->uc.url;
- struct blob_attr *cur;
- int rem;
-
- if (uh->state >= HTTP_STATE_HEADERS_SENT)
- return;
-
- ustream_printf(uh->us,
- "%s /%s HTTP/1.1\r\n"
- "Host: %s\r\n"
- "Connection: close\r\n",
- request_types[uh->req_type],
- url->location, url->host);
-
- blobmsg_for_each_attr(cur, uh->headers.head, rem)
- ustream_printf(uh->us, "%s: %s\n", blobmsg_name(cur), (char *) blobmsg_data(cur));
-
- if (url->auth) {
- int auth_len = strlen(url->auth);
- char *auth_buf;
-
- if (auth_len > 512)
- return;
-
- auth_buf = alloca(base64_len(auth_len) + 1);
- base64_encode(url->auth, auth_len, auth_buf);
- ustream_printf(uh->us, "Authorization: Basic %s\r\n", auth_buf);
- }
-
- if (uh->req_type == REQ_POST)
- ustream_printf(uh->us, "Transfer-Encoding: chunked\r\n");
-
- ustream_printf(uh->us, "\r\n");
-}
-
static int
uclient_http_send_data(struct uclient *cl, char *buf, unsigned int len)
{
uclient_http_send_headers(uh);
ustream_printf(uh->us, "%X\r\n", len);
- ustream_write(uh->us, buf, len, false);
+ if (len > 0)
+ ustream_write(uh->us, buf, len, false);
ustream_printf(uh->us, "\r\n");
return len;
int read_len = 0;
char *data, *data_end;
- if (uh->state < HTTP_STATE_RECV_DATA)
+ if (uh->state < HTTP_STATE_RECV_DATA || !uh->us)
return 0;
data = ustream_get_read_buf(uh->us, &read_len);
len = uh->read_chunked;
uh->read_chunked -= len;
+ } else if (uh->content_length >= 0) {
+ if (len > uh->content_length)
+ len = uh->content_length;
+
+ uh->content_length -= len;
+ if (!uh->content_length)
+ uh->eof = true;
}
if (len > 0) {
return len;
}
-const struct uclient_backend uclient_backend_http __hidden = {
+bool uclient_http_redirect(struct uclient *cl)
+{
+ struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
+ struct blobmsg_policy location = {
+ .name = "location",
+ .type = BLOBMSG_TYPE_STRING,
+ };
+ struct uclient_url *url = cl->url;
+ struct blob_attr *tb;
+
+ if (cl->backend != &uclient_backend_http)
+ return false;
+
+ switch (cl->status_code) {
+ case 301:
+ case 302:
+ case 307:
+ break;
+ default:
+ return false;
+ }
+
+ blobmsg_parse(&location, 1, &tb, blob_data(uh->meta.head), blob_len(uh->meta.head));
+ if (!tb)
+ return false;
+
+ url = uclient_get_url(blobmsg_data(tb), url->auth);
+ if (!url)
+ return false;
+
+ free(cl->url);
+ cl->url = url;
+ uclient_http_connect(cl);
+ uclient_http_request_done(cl);
+
+ return true;
+}
+
+const struct uclient_backend uclient_backend_http = {
.prefix = uclient_http_prefix,
.alloc = uclient_http_alloc,
.free = uclient_http_free,
.connect = uclient_http_connect,
+ .update_url = uclient_http_free_url_state,
.read = uclient_http_read,
.write = uclient_http_send_data,
projects / project / uclient.git / blobdiff