From: Dmitry Eremin-Solenikov <dmitry.ereminsoleni...@linaro.org> Support checking MTU after IPsec transformation.
Signed-off-by: Dmitry Eremin-Solenikov <dmitry.ereminsoleni...@linaro.org> --- /** Email created from pull request 304 (lumag:ipsec-ipv6-2) ** https://github.com/Linaro/odp/pull/304 ** Patch: https://github.com/Linaro/odp/pull/304.patch ** Base sha: 4cb02e1caccb9179575e95448fd46979e17d0905 ** Merge commit sha: 6f6906b608f0626d119b255b3733a4a0863aa8d1 **/ platform/linux-generic/odp_ipsec.c | 39 ++++++++++++++++++++++++++------------ 1 file changed, 27 insertions(+), 12 deletions(-) diff --git a/platform/linux-generic/odp_ipsec.c b/platform/linux-generic/odp_ipsec.c index 3c539b515..a393c5051 100644 --- a/platform/linux-generic/odp_ipsec.c +++ b/platform/linux-generic/odp_ipsec.c @@ -990,7 +990,8 @@ static int ipsec_out_esp(odp_packet_t *pkt, ipsec_state_t *state, ipsec_sa_t *ipsec_sa, odp_crypto_packet_op_param_t *param, - odp_ipsec_op_status_t *status) + odp_ipsec_op_status_t *status, + uint32_t mtu) { _odp_esphdr_t esp; _odp_esptrl_t esptrl; @@ -1026,6 +1027,11 @@ static int ipsec_out_esp(odp_packet_t *pkt, udphdr.chksum = 0; /* should be 0 by RFC */ } + if (state->ip_tot_len + hdr_len + trl_len > mtu) { + status->error.mtu = 1; + return -1; + } + if (ipsec_out_iv(state, ipsec_sa) < 0) { status->error.alg = 1; return -1; @@ -1124,7 +1130,8 @@ static int ipsec_out_ah(odp_packet_t *pkt, ipsec_state_t *state, ipsec_sa_t *ipsec_sa, odp_crypto_packet_op_param_t *param, - odp_ipsec_op_status_t *status) + odp_ipsec_op_status_t *status, + uint32_t mtu) { _odp_ahhdr_t ah; unsigned hdr_len = _ODP_AHHDR_LEN + ipsec_sa->esp_iv_len + @@ -1132,6 +1139,11 @@ static int ipsec_out_ah(odp_packet_t *pkt, uint16_t ipsec_offset = state->ip_offset + state->ip_hdr_len; uint8_t proto = _ODP_IPPROTO_AH; + if (state->ip_tot_len + hdr_len > mtu) { + status->error.mtu = 1; + return -1; + } + memset(&ah, 0, sizeof(ah)); ah.spi = odp_cpu_to_be_32(ipsec_sa->spi); ah.seq_no = odp_cpu_to_be_32(ipsec_seq_no(ipsec_sa)); @@ -1228,7 +1240,7 @@ static void ipsec_out_ah_post(ipsec_state_t *state, odp_packet_t pkt) static ipsec_sa_t *ipsec_out_single(odp_packet_t pkt, odp_ipsec_sa_t sa, odp_packet_t *pkt_out, - const odp_ipsec_out_opt_t *opt ODP_UNUSED, + const odp_ipsec_out_opt_t *opt, odp_ipsec_op_status_t *status) { ipsec_state_t state; @@ -1237,6 +1249,7 @@ static ipsec_sa_t *ipsec_out_single(odp_packet_t pkt, int rc; odp_crypto_packet_result_t crypto; /**< Crypto operation result */ odp_packet_hdr_t *pkt_hdr; + uint32_t mtu; state.ip_offset = odp_packet_l3_offset(pkt); ODP_ASSERT(ODP_PACKET_OFFSET_INVALID != state.ip_offset); @@ -1247,6 +1260,12 @@ static ipsec_sa_t *ipsec_out_single(odp_packet_t pkt, ipsec_sa = _odp_ipsec_sa_use(sa); ODP_ASSERT(NULL != ipsec_sa); + if ((opt && opt->mode == ODP_IPSEC_FRAG_CHECK) || + (!opt && ipsec_sa->out.frag_mode == ODP_IPSEC_FRAG_CHECK)) + mtu = ipsec_sa->out.mtu; + else + mtu = UINT32_MAX; + /* Initialize parameters block */ memset(¶m, 0, sizeof(param)); @@ -1281,9 +1300,9 @@ static ipsec_sa_t *ipsec_out_single(odp_packet_t pkt, } if (ODP_IPSEC_ESP == ipsec_sa->proto) { - rc = ipsec_out_esp(&pkt, &state, ipsec_sa, ¶m, status); + rc = ipsec_out_esp(&pkt, &state, ipsec_sa, ¶m, status, mtu); } else if (ODP_IPSEC_AH == ipsec_sa->proto) { - rc = ipsec_out_ah(&pkt, &state, ipsec_sa, ¶m, status); + rc = ipsec_out_ah(&pkt, &state, ipsec_sa, ¶m, status, mtu); } else { status->error.alg = 1; goto err; @@ -1402,10 +1421,6 @@ int odp_ipsec_in(const odp_packet_t pkt_in[], int num_in, return in_pkt; } -static const odp_ipsec_out_opt_t default_opt = { - .mode = ODP_IPSEC_FRAG_DISABLED, -}; - int odp_ipsec_out(const odp_packet_t pkt_in[], int num_in, odp_packet_t pkt_out[], int *num_out, const odp_ipsec_out_param_t *param) @@ -1434,7 +1449,7 @@ int odp_ipsec_out(const odp_packet_t pkt_in[], int num_in, ODP_ASSERT(ODP_IPSEC_SA_INVALID != sa); if (0 == param->num_opt) - opt = &default_opt; + opt = NULL; else opt = ¶m->opt[opt_idx]; @@ -1543,7 +1558,7 @@ int odp_ipsec_out_enq(const odp_packet_t pkt_in[], int num_in, ODP_ASSERT(ODP_IPSEC_SA_INVALID != sa); if (0 == param->num_opt) - opt = &default_opt; + opt = NULL; else opt = ¶m->opt[opt_idx]; @@ -1640,7 +1655,7 @@ int odp_ipsec_out_inline(const odp_packet_t pkt_in[], int num_in, } if (0 == param->num_opt) - opt = &default_opt; + opt = NULL; else opt = ¶m->opt[opt_idx];
