[lwip-devel] [PATCHv4 5/5] net/lwip: apps/http: add dns support

[Maxim Uvarov]

provide hostname to client and allow lwip to resolve it.

Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
---
 lib/lwip/apps/http/lwip-wget.c | 59 ++++++++++++++++++++++++++++++----
 1 file changed, 53 insertions(+), 6 deletions(-)

diff --git a/lib/lwip/apps/http/lwip-wget.c b/lib/lwip/apps/http/lwip-wget.c
index 0308b0b04a..db553a0f14 100644
--- a/lib/lwip/apps/http/lwip-wget.c
+++ b/lib/lwip/apps/http/lwip-wget.c
@@ -45,18 +45,65 @@ static void httpc_result(void *arg, httpc_result_t 
httpc_result, u32_t rx_conten
        }
 }
 
+/* http://hostname:port/url */
+static int parse_url(char *url, char *host, int *port)
+{
+       int ret;
+       char *p, *pp;
+
+       p = strstr(url, "http://";);
+       if (!p) {
+               printf("err: no http://!\n";);
+               return -1;
+       }
+
+       p += strlen("http://";);
+
+       /* parse hostname */
+       pp = strchr(p, ':');
+       if (pp) {
+               char portstr[5];
+
+               memcpy(host, p, pp - p);
+               host[pp - p + 1] = '\0';
+
+               p = pp + 1;
+               pp = strchr(p, '/');
+               if (!pp) {
+                       printf("wrong url\n");
+                       return -2;
+               }
+
+               memcpy(portstr, p, pp - p);
+               portstr[pp - p] = '\0';
+               *port = atoi(portstr);
+       } else {
+               pp = strchr(p, '/');
+               if (!pp) {
+                       printf("wrong url\n");
+                       return -3;
+               }
+               memcpy(host, p, pp - p);
+               host[pp - p + 1] = '\0';
+               *port = 80; /* default */
+       }
+
+       return 0;
+}
+
 int lwip_wget(ulong addr, char *url)
 {
        err_t err;
-       int port = 80;
-       char *server_name;
+       int port;
+       char server_name[80];
        httpc_state_t *connection;
 
        daddr = addr;
-       server_name = env_get("serverip");
-       if (!server_name) {
-               printf("error: serverip variable has to be set\n");
-               return CMD_RET_FAILURE;
+
+       err = parse_url(url, server_name, &port);
+       if (err) {
+               printf("error parse_url\n");
+               return -1;
        }
 
        printf("downloading %s to addr 0x%lx\n", url, addr);
-- 
2.30.2