Fix portability issue related with unaligned memory access

This commit is contained in:
Yang Tse
2010-02-03 06:49:27 +00:00
parent f6d288a397
commit 381a4d6efe
2 changed files with 22 additions and 10 deletions

View File

@@ -33,6 +33,11 @@
#include "memdebug.h"
#define RTP_PKT_CHANNEL(p) ((int)((unsigned char)((p)[1])))
#define RTP_PKT_LENGTH(p) ((((int)((unsigned char)((p)[2]))) << 8) | \
((int)((unsigned char)((p)[3]))))
#define RTP_DATA_SIZE 12
static const char *RTP_DATA = "$_1234\n\0asdf";
@@ -40,16 +45,18 @@ static int rtp_packet_count = 0;
static size_t rtp_write(void *ptr, size_t size, size_t nmemb, void *stream) {
char *data = (char *)ptr;
int channel = (int)data[1];
int message_size = (int)(size * nmemb - 4);
unsigned short coded_size = ntohs(*((unsigned short*)(&data[2])));
int channel = RTP_PKT_CHANNEL(data);
int message_size = (int)(size * nmemb) - 4;
int coded_size = RTP_PKT_LENGTH(data);
size_t failure = (size * nmemb) ? 0 : 1;
int i;
(void)stream;
printf("RTP: message size %d, channel %d\n", message_size, channel);
if((unsigned short) message_size != coded_size) {
printf("RTP embedded size (%hu) does not match the write size (%d).\n",
coded_size, message_size);
if(message_size != coded_size) {
printf("RTP embedded size (%d) does not match the write size (%d).\n",
coded_size, message_size);
return failure;
}
data += 4;
@@ -57,11 +64,13 @@ static size_t rtp_write(void *ptr, size_t size, size_t nmemb, void *stream) {
if(message_size - i > RTP_DATA_SIZE) {
if(memcmp(RTP_DATA, data + i, RTP_DATA_SIZE) != 0) {
printf("RTP PAYLOAD CORRUPTED [%s]\n", data + i);
return failure;
}
} else {
if (memcmp(RTP_DATA, data + i, message_size - i) != 0) {
printf("RTP PAYLOAD END CORRUPTED (%d), [%s]\n",
message_size - i, data + i);
return failure;
}
}
}