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net: http_client: Fix http_client_req() return value

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http_client_req() was supposed to return the number of bytes sent as a
HTTP request. The return value was not riht however due to some bugs in
helper functions:
* http_send_data() returned the current buffer position istead of the
  number of bytes actually sent. This could result in counting the same
  data into the total request size several times. A helper variable was
  added to track how many bytes were actually sent to the network.
* http_flush_data() forwarded the return value of sendall() helper
  function. That function however did not return number of bytes sent,
  but 0 or a negative error code.

Additionally, change the return type of sendall() function - according
to standard the ssize_t type is only capable of holding -1 negative
value, but the function could return the full range of negative errno
values. Use int instead.

Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
This commit is contained in:
Robert Lubos 2022-03-17 13:38:13 +01:00 • committed by Carles Cufí
commit ffdc621f1b
1 changed files with 14 additions and 4 deletions
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18
subsys/net/lib/http/http_client.c
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@ -29,7 +29,7 @@ LOG_MODULE_REGISTER(net_http, CONFIG_NET_HTTP_LOG_LEVEL);
#define HTTP_CONTENT_LEN_SIZE 6
#define MAX_SEND_BUF_LEN 192
static ssize_t sendall(int sock, const void *buf, size_t len)
static int sendall(int sock, const void *buf, size_t len)
{
while (len) {
ssize_t out_len = zsock_send(sock, buf, len, 0);
@ -53,6 +53,7 @@ static int http_send_data(int sock, char *send_buf,
va_list va;
int ret, end_of_send = *send_buf_pos;
int end_of_data, remaining_len;
int sent = 0;
va_start(va, send_buf_pos);
@ -85,7 +86,7 @@ static int http_send_data(int sock, char *send_buf,
end_of_send, ret);
goto err;
}
sent += end_of_send;
end_of_send = 0;
continue;
} else {
@ -110,7 +111,7 @@ static int http_send_data(int sock, char *send_buf,
*send_buf_pos = end_of_send;
return end_of_send;
return sent;
err:
va_end(va);
@ -120,9 +121,16 @@ err:
static int http_flush_data(int sock, const char *send_buf, size_t send_buf_len)
{
int ret;
LOG_HEXDUMP_DBG(send_buf, send_buf_len, "Data to send");
return sendall(sock, send_buf, send_buf_len);
ret = sendall(sock, send_buf, send_buf_len);
if (ret < 0) {
return ret;
}
return (int)send_buf_len;
}
static void print_header_field(size_t len, const char *str)
@ -664,6 +672,8 @@ int http_client_req(int sock, struct http_request *req,
if (ret < 0) {
goto out;
}
total_sent += ret;
}
if (send_buf_pos > 0) {