os_mbuf_memcmp

int os_mbuf_memcmp(const struct os_mbuf *om, int off, const void *data, int len)

Performs a memory compare of the specified region of an mbuf chain against a flat buffer.

Arguments

Arguments	Description
om	Pointer to mbuf
off	Offset, in bytes, from start of mbuf to start of comparison
data	Pointer to flat data buffer to compare
len	Number of bytes to compare

Returned values

A value of zero means the memory regions are identical; all other values represent either an error or a value returned from memcmp.

Notes

This function will compare bytes starting from off bytes from the start of the mbuf chain with a data buffer.

Example

    int rc;
	struct os_mbuf *om;
    uint8_t my_data_buffer[32];

    /* Get a packet header mbuf with a user header in it */
    rc = os_mbuf_memcmp(om, 0, my_data_buffer, 32);
    if (!rc) {
        /* "my_data_buffer" and the data from offset 0 in the mbuf chain are identical! */
    }