pespin has submitted this change. ( https://gerrit.osmocom.org/c/osmo-ggsn/+/38506?usp=email )
Change subject: ggsn: Rename confusing functions ......................................................................
ggsn: Rename confusing functions
It's really confusing having a function operating on a rx path called "encaps" since it's not really encapsulating anything. This confuses the reader by thinking this is the function encapsulating packets into GTP-U.
Change-Id: I7ff54f5e57ccc2c436becd1be1b0f728cbcdb12c --- M ggsn/ggsn.c M sgsnemu/sgsnemu.c 2 files changed, 16 insertions(+), 13 deletions(-)
Approvals: osmith: Looks good to me, approved Jenkins Builder: Verified laforge: Looks good to me, but someone else must approve
diff --git a/ggsn/ggsn.c b/ggsn/ggsn.c index a02b97f..6b51bbc 100644 --- a/ggsn/ggsn.c +++ b/ggsn/ggsn.c @@ -667,7 +667,8 @@ return rc; }
-/* Internet-originated IP packet, needs to be sent via GTP towards MS */ +/* Rx Internet-originated IP packet from our tun iface, needs to be sent via + * GTPU towards MS. */ static int cb_tun_ind(struct tun_t *tun, void *pack, unsigned len) { struct apn_ctx *apn = tun->priv; @@ -747,8 +748,10 @@ return 0; }
-/* MS-originated GTP1-U packet, needs to be sent via TUN device */ -static int encaps_tun(struct pdp_t *pdp, void *pack, unsigned len) +/* Rx MS-originated GTP-U packet, needs to be sent via TUN device. + * "pack" contains the GTP-U payload once decapsulated from GTP-U by libgtp. + * Hence, "pack" should contain an IP packet. */ +static int cb_gtpu_data_ind(struct pdp_t *pdp, void *pack, unsigned len) { struct iphdr *iph = (struct iphdr *)pack; struct ip6_hdr *ip6h = (struct ip6_hdr *)pack; @@ -963,7 +966,7 @@ rc = osmo_fd_register(&ggsn->gtp_fd1u); OSMO_ASSERT(rc == 0);
- gtp_set_cb_data_ind(ggsn->gsn, encaps_tun); + gtp_set_cb_data_ind(ggsn->gsn, cb_gtpu_data_ind); gtp_set_cb_create_context_ind(ggsn->gsn, create_context_ind); gtp_set_cb_update_context_ind(ggsn->gsn, update_context_ind); gtp_set_cb_delete_context(ggsn->gsn, delete_context); diff --git a/sgsnemu/sgsnemu.c b/sgsnemu/sgsnemu.c index 9ab0f25..c592aa9 100644 --- a/sgsnemu/sgsnemu.c +++ b/sgsnemu/sgsnemu.c @@ -1196,7 +1196,7 @@ return 0; }
-static int encaps_ping4(struct pdp_t *pdp, void *pack, unsigned len) +static int cb_gtpu_data_ind_ping4(struct pdp_t *pdp, void *pack, unsigned len) { struct timeval tv; struct timeval *tp; @@ -1258,7 +1258,7 @@ return 0; }
-static int encaps_ping6(struct pdp_t *pdp, struct ip6_hdr *ip6h, unsigned len) +static int cb_gtpu_data_ind_ping6(struct pdp_t *pdp, struct ip6_hdr *ip6h, unsigned len) { const struct icmpv6_echo_hdr *ic6h = (struct icmpv6_echo_hdr *) ((uint8_t*)ip6h + sizeof(*ip6h)); struct timeval tv; @@ -1325,7 +1325,7 @@ }
/* Handle a received ping packet. Print out line and update statistics. */ -static int encaps_ping(struct pdp_t *pdp, void *pack, unsigned len) +static int cb_gtpu_data_ind_ping(struct pdp_t *pdp, void *pack, unsigned len) { struct iphdr *iph = (struct iphdr *)pack; struct timeval tv; @@ -1343,9 +1343,9 @@ } switch(iph->version) { case 4: - return encaps_ping4(pdp, pack, len); + return cb_gtpu_data_ind_ping4(pdp, pack, len); case 6: - return encaps_ping6(pdp, (struct ip6_hdr *)pack, len); + return cb_gtpu_data_ind_ping6(pdp, (struct ip6_hdr *)pack, len); default: SYS_ERR(DSGSN, LOGL_ERROR, 0, "Unknown ip header version %d", iph->version); return -1; @@ -1812,7 +1812,7 @@ } }
-static int encaps_tun(struct pdp_t *pdp, void *pack, unsigned len) +static int cb_gtpu_data_ind(struct pdp_t *pdp, void *pack, unsigned len) { struct iphdr *iph = (struct iphdr *)pack; struct icmpv6_radv_hdr *ra; @@ -1826,7 +1826,7 @@ break; }
- /* printf("encaps_tun. Packet received: forwarding to tun\n"); */ + /* printf("cb_gtpu_data_ind. Packet received: forwarding to tun\n"); */ return tun_encaps((struct tun_t *)pdp->ipif, pack, len); }
@@ -1883,9 +1883,9 @@ gtp_set_cb_delete_context(gsn, delete_context); gtp_set_cb_conf(gsn, _gtp_cb_conf); if (options.createif) - gtp_set_cb_data_ind(gsn, encaps_tun); + gtp_set_cb_data_ind(gsn, cb_gtpu_data_ind); else - gtp_set_cb_data_ind(gsn, encaps_ping); + gtp_set_cb_data_ind(gsn, cb_gtpu_data_ind_ping);
#if defined(__linux__) if ((options.createif) && (options.netns)) {
-
pespin