libnet_ptag_t libnet_build_ntp(u_int8_t leap_indicator, u_int8_t version, u_int8_t mode, u_int8_t stratum, u_int8_t poll, u_int8_t precision, u_int16_t delay_int, u_int16_t delay_frac, u_int16_t dispersion_int, u_int16_t dispersion_frac, u_int32_t reference_id, u_int32_t ref_ts_int, u_int32_t ref_ts_frac, u_int32_t orig_ts_int, u_int32_t orig_ts_frac, u_int32_t rec_ts_int, u_int32_t rec_ts_frac, u_int32_t xmt_ts_int, u_int32_t xmt_ts_frac, u_int8_t *payload, u_int32_t payload_s, libnet_t *l, libnet_ptag_t ptag) { u_int32_t n, h; libnet_pblock_t *p; struct libnet_ntp_hdr ntp_hdr; if (l == NULL) { return (-1); } n = LIBNET_NTP_H + payload_s; h = 0; /* * Find the existing protocol block if a ptag is specified, or create * a new one. */ p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_NTP_H); if (p == NULL) { return (-1); } memset(&ntp_hdr, 0, sizeof(ntp_hdr)); ntp_hdr.ntp_li_vn_mode = LIBNET_NTP_DO_LI_VN_MODE( leap_indicator, version, mode); ntp_hdr.ntp_stratum = stratum; ntp_hdr.ntp_poll = poll; ntp_hdr.ntp_precision = precision; ntp_hdr.ntp_delay.integer = htons(delay_int); ntp_hdr.ntp_delay.fraction = htons(delay_frac); ntp_hdr.ntp_dispersion.integer = htons(dispersion_int); ntp_hdr.ntp_dispersion.fraction = htons(dispersion_frac); ntp_hdr.ntp_reference_id = htonl(reference_id); ntp_hdr.ntp_ref_ts.integer = htonl(ref_ts_int); ntp_hdr.ntp_ref_ts.fraction = htonl(ref_ts_frac); ntp_hdr.ntp_orig_ts.integer = htonl(orig_ts_int); ntp_hdr.ntp_orig_ts.fraction = htonl(orig_ts_frac); ntp_hdr.ntp_rec_ts.integer = htonl(orig_ts_int); ntp_hdr.ntp_rec_ts.fraction = htonl(orig_ts_frac); ntp_hdr.ntp_xmt_ts.integer = htonl(xmt_ts_int); ntp_hdr.ntp_xmt_ts.fraction = htonl(xmt_ts_frac); n = libnet_pblock_append(l, p, (u_int8_t *)&ntp_hdr, LIBNET_NTP_H); if (n == -1) { goto bad; } if ((payload && !payload_s) || (!payload && payload_s)) { snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, "%s(): payload inconsistency\n", __func__); goto bad; } if (payload && payload_s) { n = libnet_pblock_append(l, p, payload, payload_s); if (n == -1) { goto bad; } } return (ptag ? ptag : libnet_pblock_update(l, p, h, LIBNET_PBLOCK_NTP_H)); bad: libnet_pblock_delete(l, p); return (-1); }
libnet_ptag_t libnet_build_ntp(uint8_t leap_indicator, uint8_t version, uint8_t mode, uint8_t stratum, uint8_t poll, uint8_t precision, uint16_t delay_int, uint16_t delay_frac, uint16_t dispersion_int, uint16_t dispersion_frac, uint32_t reference_id, uint32_t ref_ts_int, uint32_t ref_ts_frac, uint32_t orig_ts_int, uint32_t orig_ts_frac, uint32_t rec_ts_int, uint32_t rec_ts_frac, uint32_t xmt_ts_int, uint32_t xmt_ts_frac, const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag) { uint32_t n, h; libnet_pblock_t *p; struct libnet_ntp_hdr ntp_hdr; if (l == NULL) { return (-1); } n = LIBNET_NTP_H + payload_s; h = 0; /* * Find the existing protocol block if a ptag is specified, or create * a new one. */ p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_NTP_H); if (p == NULL) { return (-1); } memset(&ntp_hdr, 0, sizeof(ntp_hdr)); ntp_hdr.ntp_li_vn_mode = LIBNET_NTP_DO_LI_VN_MODE( leap_indicator, version, mode); ntp_hdr.ntp_stratum = stratum; ntp_hdr.ntp_poll = poll; ntp_hdr.ntp_precision = precision; ntp_hdr.ntp_delay.integer = htons(delay_int); ntp_hdr.ntp_delay.fraction = htons(delay_frac); ntp_hdr.ntp_dispersion.integer = htons(dispersion_int); ntp_hdr.ntp_dispersion.fraction = htons(dispersion_frac); ntp_hdr.ntp_reference_id = htonl(reference_id); ntp_hdr.ntp_ref_ts.integer = htonl(ref_ts_int); ntp_hdr.ntp_ref_ts.fraction = htonl(ref_ts_frac); ntp_hdr.ntp_orig_ts.integer = htonl(orig_ts_int); ntp_hdr.ntp_orig_ts.fraction = htonl(orig_ts_frac); ntp_hdr.ntp_rec_ts.integer = htonl(rec_ts_int); ntp_hdr.ntp_rec_ts.fraction = htonl(rec_ts_frac); ntp_hdr.ntp_xmt_ts.integer = htonl(xmt_ts_int); ntp_hdr.ntp_xmt_ts.fraction = htonl(xmt_ts_frac); n = libnet_pblock_append(l, p, (uint8_t *)&ntp_hdr, LIBNET_NTP_H); if (n == -1) { goto bad; } /* boilerplate payload sanity check / append macro */ LIBNET_DO_PAYLOAD(l, p); return (ptag ? ptag : libnet_pblock_update(l, p, h, LIBNET_PBLOCK_NTP_H)); bad: libnet_pblock_delete(l, p); return (-1); }