rem: *p++ = '<';
add: *p++ = '>';
context: int build_contact(ucontact_t* c){	char* p;	int fl, len;	contact.data_len = calc_buf_len(c);	if (!contact.data_len) return 0;	if (!contact.buf || (contact.buf_len < contact.data_len)) {		if (contact.buf) pkg_free(contact.buf);		contact.buf = (char*)pkg_malloc(contact.data_len);		if (!contact.buf) {			contact.data_len = 0;			contact.buf_len = 0;			LOG(L_ERR, "build_contact(): No memory left\n");			return -1;		} else {			contact.buf_len = contact.data_len;		}	}	p = contact.buf;		memcpy(p, CONTACT_BEGIN, CONTACT_BEGIN_LEN);	p += CONTACT_BEGIN_LEN;	fl = 0;	while(c) {		if (VALID_CONTACT(c, act_time)) {			if (fl) {				memcpy(p, CONTACT_SEP, CONTACT_SEP_LEN);				p += CONTACT_SEP_LEN;			} else {				fl = 1;			}			*p++ = '<';			memcpy(p, c->c.s, c->c.len);			p += c->c.len;			*p++ = '<';			len = len_q(c->q);			if (len) {				memcpy(p, Q_PARAM, Q_PARAM_LEN);				p += Q_PARAM_LEN;				memcpy(p, q2str(c->q, 0), len);				p += len;			}			memcpy(p, EXPIRES_PARAM, EXPIRES_PARAM_LEN);			p += EXPIRES_PARAM_LEN;			memcpy(p, int2str((int)(c->expires - act_time), &len), len);			p += len;		}		c = c->next;	}	memcpy(p, CRLF, CRLF_LEN);	p += CRLF_LEN;	contact.data_len = p - contact.buf;	DBG("build_contact(): Created Contact HF: %.*s\n", contact.data_len, contact.buf);	return 0;}