uclient.h

   1 /*
   2  * uclient - ustream based protocol client library
   3  *
   4  * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #ifndef __LIBUBOX_UCLIENT_H
  19 #define __LIBUBOX_UCLIENT_H
  20
  21 #include <netinet/in.h>
  22
  23 #include <libubox/blob.h>
  24 #include <libubox/ustream.h>
  25 #include <libubox/ustream-ssl.h>
  26
  27 struct uclient_cb;
  28 struct uclient_backend;
  29
  30 enum uclient_error_code {
  31         UCLIENT_ERROR_UNKNOWN,
  32         UCLIENT_ERROR_CONNECT,
  33         UCLIENT_ERROR_SSL_INVALID_CERT,
  34         UCLIENT_ERROR_SSL_CN_MISMATCH,
  35         UCLIENT_ERROR_MISSING_SSL_CONTEXT,
  36 };
  37
  38 union uclient_addr {
  39         struct sockaddr sa;
  40         struct sockaddr_in sin;
  41         struct sockaddr_in6 sin6;
  42 };
  43
  44 struct uclient {
  45         const struct uclient_backend *backend;
  46         const struct uclient_cb *cb;
  47
  48         union uclient_addr local_addr, remote_addr;
  49
  50         struct uclient_url *url;
  51         void *priv;
  52
  53         bool eof;
  54         int error_code;
  55         int status_code;
  56         struct blob_attr *meta;
  57
  58         struct uloop_timeout timeout;
  59 };
  60
  61 struct uclient_cb {
  62         void (*data_read)(struct uclient *cl);
  63         void (*data_sent)(struct uclient *cl);
  64         void (*data_eof)(struct uclient *cl);
  65         void (*header_done)(struct uclient *cl);
  66         void (*error)(struct uclient *cl, int code);
  67 };
  68
  69 struct uclient *uclient_new(const char *url, const char *auth_str, const struct uclient_cb *cb);
  70 void uclient_free(struct uclient *cl);
  71
  72 int uclient_set_url(struct uclient *cl, const char *url, const char *auth);
  73 int uclient_connect(struct uclient *cl);
  74
  75 int uclient_read(struct uclient *cl, char *buf, int len);
  76 int uclient_write(struct uclient *cl, char *buf, int len);
  77 int uclient_request(struct uclient *cl);
  78
  79 char *uclient_get_addr(char *dest, int *port, union uclient_addr *a);
  80
  81 /* HTTP */
  82 extern const struct uclient_backend uclient_backend_http;
  83
  84 int uclient_http_reset_headers(struct uclient *cl);
  85 int uclient_http_set_header(struct uclient *cl, const char *name, const char *value);
  86 int uclient_http_set_request_type(struct uclient *cl, const char *type);
  87 bool uclient_http_redirect(struct uclient *cl);
  88
  89 int uclient_http_set_ssl_ctx(struct uclient *cl, const struct ustream_ssl_ops *ops,
  90                              struct ustream_ssl_ctx *ctx, bool require_validation);
  91
  92 #endif