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rtsp: Segfault in rtsp.c when using WRITEDATA

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If the INTERLEAVEFUNCTION is defined, then use that plus the
INTERLEAVEDATA information when writing RTP. Otherwise, use
WRITEFUNCTION and WRITEDATA.

Fixes #1880
Closes #1884
This commit is contained in:
Max Dymond 2017-09-12 19:45:19 +01:00 committed by Daniel Stenberg
parent 9bba664e02
commit 08dbed31d5
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GPG Key ID: 5CC908FDB71E12C2
1 changed files with 14 additions and 9 deletions
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23
lib/rtsp.c
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@ -749,23 +749,28 @@ CURLcode rtp_client_write(struct connectdata *conn, char *ptr, size_t len)
struct Curl_easy *data = conn->data; struct Curl_easy *data = conn->data;
size_t wrote; size_t wrote;
curl_write_callback writeit; curl_write_callback writeit;
void *user_ptr;
if(len == 0) { if(len == 0) {
failf(data, "Cannot write a 0 size RTP packet."); failf(data, "Cannot write a 0 size RTP packet.");
return CURLE_WRITE_ERROR; return CURLE_WRITE_ERROR;
} }
writeit = data->set.fwrite_rtp?data->set.fwrite_rtp:data->set.fwrite_func; /* If the user has configured CURLOPT_INTERLEAVEFUNCTION then use that
function and any configured CURLOPT_INTERLEAVEDATA to write out the RTP
if(!data->set.fwrite_rtp && !data->set.is_fwrite_set && data. Otherwise, use the CURLOPT_WRITEFUNCTION with the CURLOPT_WRITEDATA
!data->set.rtp_out) { pointer to write out the RTP data. */
/* if no callback is set for either RTP or default, the default function if(data->set.fwrite_rtp) {
fwrite() is utilized and that can't handle a NULL input */ writeit = data->set.fwrite_rtp;
failf(data, "No destination to default data callback!"); user_ptr = data->set.rtp_out;
return CURLE_WRITE_ERROR; }
else
{
writeit = data->set.fwrite_func;
user_ptr = data->set.out;
} }
wrote = writeit(ptr, 1, len, data->set.rtp_out); wrote = writeit(ptr, 1, len, user_ptr);
if(CURL_WRITEFUNC_PAUSE == wrote) { if(CURL_WRITEFUNC_PAUSE == wrote) {
failf(data, "Cannot pause RTP"); failf(data, "Cannot pause RTP");