examples/gcoap: add handling of proxied requests
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Cenk Gündoğan
parent
50900a1fbe
commit
7cda842a00
@ -30,6 +30,10 @@
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#define ENABLE_DEBUG (0)
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#include "debug.h"
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static bool _proxied = false;
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static sock_udp_ep_t _proxy_remote;
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static char proxy_uri[64];
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static ssize_t _encode_link(const coap_resource_t *resource, char *buf,
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size_t maxlen, coap_link_encoder_ctx_t *context);
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static void _resp_handler(const gcoap_request_memo_t *memo, coap_pkt_t* pdu,
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@ -58,7 +62,7 @@ static gcoap_listener_t _listener = {
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/* Retain request path to re-request if response includes block. User must not
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* start a new request (with a new path) until any blockwise transfer
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* completes or times out. */
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#define _LAST_REQ_PATH_MAX (32)
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#define _LAST_REQ_PATH_MAX (64)
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static char _last_req_path[_LAST_REQ_PATH_MAX];
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/* Counts requests sent by CLI. */
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@ -137,13 +141,25 @@ static void _resp_handler(const gcoap_request_memo_t *memo, coap_pkt_t* pdu,
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return;
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}
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if (_proxied) {
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gcoap_req_init(pdu, (uint8_t *)pdu->hdr, CONFIG_GCOAP_PDU_BUF_SIZE,
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COAP_METHOD_GET, NULL);
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}
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else {
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gcoap_req_init(pdu, (uint8_t *)pdu->hdr, CONFIG_GCOAP_PDU_BUF_SIZE,
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COAP_METHOD_GET, _last_req_path);
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}
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if (msg_type == COAP_TYPE_ACK) {
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coap_hdr_set_type(pdu->hdr, COAP_TYPE_CON);
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}
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block.blknum++;
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coap_opt_add_block2_control(pdu, &block);
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if (_proxied) {
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coap_opt_add_proxy_uri(pdu, _last_req_path);
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}
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int len = coap_opt_finish(pdu, COAP_OPT_FINISH_NONE);
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gcoap_req_send((uint8_t *)pdu->hdr, len, remote,
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_resp_handler, memo->context);
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@ -214,52 +230,70 @@ static ssize_t _riot_board_handler(coap_pkt_t *pdu, uint8_t *buf, size_t len, vo
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}
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}
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static size_t _send(uint8_t *buf, size_t len, char *addr_str, char *port_str)
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static bool _parse_endpoint(sock_udp_ep_t *remote,
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char *addr_str, char *port_str)
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{
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ipv6_addr_t addr;
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size_t bytes_sent;
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sock_udp_ep_t remote;
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remote.family = AF_INET6;
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remote->family = AF_INET6;
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/* parse for interface */
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char *iface = ipv6_addr_split_iface(addr_str);
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if (!iface) {
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if (gnrc_netif_numof() == 1) {
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/* assign the single interface found in gnrc_netif_numof() */
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remote.netif = (uint16_t)gnrc_netif_iter(NULL)->pid;
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remote->netif = (uint16_t)gnrc_netif_iter(NULL)->pid;
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}
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else {
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remote.netif = SOCK_ADDR_ANY_NETIF;
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remote->netif = SOCK_ADDR_ANY_NETIF;
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}
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}
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else {
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int pid = atoi(iface);
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if (gnrc_netif_get_by_pid(pid) == NULL) {
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puts("gcoap_cli: interface not valid");
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return 0;
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return false;
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}
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remote.netif = pid;
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remote->netif = pid;
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}
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/* parse destination address */
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if (ipv6_addr_from_str(&addr, addr_str) == NULL) {
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puts("gcoap_cli: unable to parse destination address");
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return 0;
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return false;
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}
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if ((remote.netif == SOCK_ADDR_ANY_NETIF) && ipv6_addr_is_link_local(&addr)) {
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if ((remote->netif == SOCK_ADDR_ANY_NETIF) && ipv6_addr_is_link_local(&addr)) {
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puts("gcoap_cli: must specify interface for link local target");
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return 0;
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return false;
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}
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memcpy(&remote.addr.ipv6[0], &addr.u8[0], sizeof(addr.u8));
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memcpy(&remote->addr.ipv6[0], &addr.u8[0], sizeof(addr.u8));
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/* parse port */
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remote.port = atoi(port_str);
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if (remote.port == 0) {
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remote->port = atoi(port_str);
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if (remote->port == 0) {
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puts("gcoap_cli: unable to parse destination port");
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return 0;
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return false;
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}
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bytes_sent = gcoap_req_send(buf, len, &remote, _resp_handler, NULL);
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return true;
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}
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static size_t _send(uint8_t *buf, size_t len, char *addr_str, char *port_str)
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{
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size_t bytes_sent;
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sock_udp_ep_t *remote;
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if (_proxied) {
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remote = &_proxy_remote;
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}
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else {
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sock_udp_ep_t new_remote;
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if (!_parse_endpoint(&new_remote, addr_str, port_str)) {
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return 0;
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}
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remote = &new_remote;
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}
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bytes_sent = gcoap_req_send(buf, len, remote, _resp_handler, NULL);
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if (bytes_sent > 0) {
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req_count++;
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}
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@ -285,10 +319,40 @@ int gcoap_cli_cmd(int argc, char **argv)
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printf("CoAP server is listening on port %u\n", CONFIG_GCOAP_PORT);
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printf(" CLI requests sent: %u\n", req_count);
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printf("CoAP open requests: %u\n", open_reqs);
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printf("Configured Proxy: ");
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if (_proxied) {
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char addrstr[IPV6_ADDR_MAX_STR_LEN];
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printf("[%s]:%u\n",
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ipv6_addr_to_str(addrstr,
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(ipv6_addr_t *) &_proxy_remote.addr.ipv6,
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sizeof(addrstr)),
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_proxy_remote.port);
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}
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else {
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puts("None");
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}
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return 0;
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}
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else if (strcmp(argv[1], "proxy") == 0) {
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if ((argc == 5) && (strcmp(argv[2], "set") == 0)) {
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if (!_parse_endpoint(&_proxy_remote, argv[3], argv[4])) {
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puts("Could not set proxy");
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return 1;
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}
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_proxied = true;
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return 0;
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}
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if ((argc == 3) && (strcmp(argv[2], "unset") == 0)) {
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memset(&_proxy_remote, 0, sizeof(_proxy_remote));
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_proxied = false;
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return 0;
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}
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printf("usage: %s proxy set <addr>[%%iface] <port>\n", argv[0]);
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printf(" %s proxy unset\n", argv[0]);
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return 1;
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}
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/* if not 'info', must be a method code */
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/* if not 'info' and 'proxy', must be a method code */
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int code_pos = -1;
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for (size_t i = 0; i < ARRAY_SIZE(method_codes); i++) {
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if (strcmp(argv[1], method_codes[i]) == 0) {
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@ -314,17 +378,36 @@ int gcoap_cli_cmd(int argc, char **argv)
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*/
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if (((argc == apos + 3) && (code_pos == 0)) ||
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((argc == apos + 4) && (code_pos != 0))) {
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gcoap_req_init(&pdu, &buf[0], CONFIG_GCOAP_PDU_BUF_SIZE, code_pos+1, argv[apos+2]);
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char *uri = argv[apos+2];
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int uri_len = strlen(argv[apos+2]);
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if (_proxied) {
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uri_len = snprintf(proxy_uri, 64, "coap://[%s]:%s%s", argv[apos], argv[apos+1], uri);
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uri = proxy_uri;
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gcoap_req_init(&pdu, &buf[0], CONFIG_GCOAP_PDU_BUF_SIZE, code_pos+1, NULL);
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}
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else{
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gcoap_req_init(&pdu, &buf[0], CONFIG_GCOAP_PDU_BUF_SIZE, code_pos+1, uri);
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}
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coap_hdr_set_type(pdu.hdr, msg_type);
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memset(_last_req_path, 0, _LAST_REQ_PATH_MAX);
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if (strlen(argv[apos+2]) < _LAST_REQ_PATH_MAX) {
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memcpy(_last_req_path, argv[apos+2], strlen(argv[apos+2]));
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if (uri_len < _LAST_REQ_PATH_MAX) {
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memcpy(_last_req_path, uri, uri_len);
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}
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size_t paylen = (argc == apos + 4) ? strlen(argv[apos+3]) : 0;
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if (paylen) {
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coap_opt_add_format(&pdu, COAP_FORMAT_TEXT);
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}
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if (_proxied) {
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coap_opt_add_proxy_uri(&pdu, uri);
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}
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if (paylen) {
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len = coap_opt_finish(&pdu, COAP_OPT_FINISH_PAYLOAD);
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if (pdu.payload_len >= paylen) {
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memcpy(pdu.payload, argv[apos+3], paylen);
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@ -374,7 +457,7 @@ int gcoap_cli_cmd(int argc, char **argv)
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}
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end:
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printf("usage: %s <get|post|put|info>\n", argv[0]);
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printf("usage: %s <get|post|put|proxy|info>\n", argv[0]);
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return 1;
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}
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