Question #670792 on rohc changed:
https://answers.launchpad.net/rohc/+question/670792
Description changed to:
Dear Sir,
Hi, I'm developing a code for compretion. And it is returning rohc_status =
ROHC_STATUS_ERROR , for the rohc_compress4(). Can't figure out what is the
issue, I checked the buffer size, the input buffer before passing to the
function buffer is not empty, and the rohc buffer is empty I don't know what is
the issue with the code. The compression function is only working for profile
0x0000, For every other profile, it returns ROHC_STATUS_ERROR.
Regards,
Jyotirmay Saini
**********************************************************************
#define PAYLOAD "hello world"
THIS IS INPUT PACKET
// Create an IP packet for the purpose of this simple program
printf("\nBuild a fake IP packet.\n");
rohc_buf_byte_at(ip_packet, 0) = 4 << 4; // IP version 4
rohc_buf_byte_at(ip_packet, 0) |= 5; //IHL: min. IPv4
header length (in 32-bit words)
rohc_buf_byte_at(ip_packet, 1) = 0; // TOS
ip_packet.len = 5 * 4 + strlen(PAYLOAD);
rohc_buf_byte_at(ip_packet, 2) = (ip_packet.len >> 8) &
0xff; // Total Length
rohc_buf_byte_at(ip_packet, 3) = ip_packet.len & 0xff;
rohc_buf_byte_at(ip_packet, 4) = 0; // IP-ID
rohc_buf_byte_at(ip_packet, 5) = 0;
rohc_buf_byte_at(ip_packet, 6) = 0; // Fragment Offset
and IP flags
rohc_buf_byte_at(ip_packet, 7) = 0;
rohc_buf_byte_at(ip_packet, 8) = 1; // TTL
rohc_buf_byte_at(ip_packet, 9) = 134; // Protocol:
unassigned number
rohc_buf_byte_at(ip_packet, 10) = 0xa9; // IP Checksum
rohc_buf_byte_at(ip_packet, 11) = 0x3f;
rohc_buf_byte_at(ip_packet, 12) = 0x01; // Source address
rohc_buf_byte_at(ip_packet, 13) = 0x02;
rohc_buf_byte_at(ip_packet, 14) = 0x03;
rohc_buf_byte_at(ip_packet, 15) = 0x04;
rohc_buf_byte_at(ip_packet, 16) = 0x05; // Destination
address
rohc_buf_byte_at(ip_packet, 17) = 0x06;
rohc_buf_byte_at(ip_packet, 18) = 0x07;
rohc_buf_byte_at(ip_packet, 19) = 0x08;
// Copy the payload just after the IP header
memcpy(rohc_buf_data_at(ip_packet, 5 * 4), PAYLOAD,
strlen(PAYLOAD));
********************************************************************************************
HERE THE FUNCTION IS BEING USED
// Compress the IP packet.
printf("Compress the IP packet.\n");
rohc_status = rohc_compress4(compressor, ip_packet,
&rohc_packet);
if(rohc_status != ROHC_STATUS_OK)
{
fprintf(stderr, "compression of IP packet failed: %s
(%d)\n",
rohc_strerror(rohc_status), rohc_status);
// Cleanup compressor, then leave with an error code.
rohc_comp_free(compressor);
return 1;
}
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