Changeset 8753bb8 for lib

Timestamp:

01/10/12 14:23:53 (10 years ago)

Author:

Shane Alcock <salcock@…>

Branches:

4.0.1-hotfixes, cachetimestamps, develop, dpdk-ndag, etsilive, getfragoff, help, libtrace4, master, ndag_format, pfring, rc-4.0.1, rc-4.0.2, rc-4.0.3, rc-4.0.4, ringdecrementfix, ringperformance, ringtimestampfixes

Children:

66e6d16

Parents:

a3041a4

Message:

• Moved OSPF code into a separate source file (hope you're happy, Perry!) :)

Location:

lib

Files:

• Makefile.am (modified) (1 diff)
• protocols_ospf.c (added)
• protocols_transport.c (modified) (1 diff)

lib/Makefile.am

@@ -62 +62 @@
                 linktypes.c link_wireless.c \
                 protocols_pktmeta.c protocols_l2.c protocols_l3.c \
-                protocols_transport.c protocols.h \
+                protocols_transport.c protocols.h protocols_ospf.c \
                 $(DAGSOURCE) format_erf.h \
                 $(BPFJITSOURCE) \

lib/protocols_transport.c

@@ -194 +194 @@
 }
 
-DLLEXPORT void *trace_get_ospf_header(libtrace_packet_t *packet,
-                uint8_t *version, uint32_t *remaining) {
-        uint8_t proto;
-        void *ospf;
-        uint32_t dummy_rem = 0;
-
-
-        if (!remaining)
-                remaining = &dummy_rem;
-
-        assert(version != NULL && "version may not be NULL when calling trace_get_ospf_header!");
-
-        ospf = trace_get_transport(packet, &proto, remaining);
-
-        if (!ospf || proto != TRACE_IPPROTO_OSPF || *remaining == 0)
-                return NULL;
-
-        *version = *((uint8_t *)ospf);
-        
-        if (*version == 2 && *remaining < sizeof(libtrace_ospf_v2_t))
-                return NULL;
-
-        return ospf;
-}
-
-DLLEXPORT void *trace_get_ospf_contents_v2(libtrace_ospf_v2_t *header,
-                uint8_t *ospf_type, uint32_t *remaining) {
-
-        uint8_t dummy_type;
-        char *ptr;
-        
-        assert(remaining != NULL && "remaining may not be NULL when calling trace_get_ospf_contents!");
-
-        if (!ospf_type)
-                ospf_type = &dummy_type;
-
-        if (!header || *remaining < sizeof(libtrace_ospf_v2_t)) {
-                *ospf_type = 0;
-                *remaining = 0;
-                return NULL;
-        }
-        
-        *ospf_type = header->type;
-
-        ptr = ((char *)header) + sizeof(libtrace_ospf_v2_t);
-        *remaining -= sizeof(libtrace_ospf_v2_t);
-
-        return (void *)ptr;
-
-}
-
-DLLEXPORT unsigned char *trace_get_first_ospf_link_from_router_lsa_v2(
-                libtrace_ospf_router_lsa_v2_t *lsa,
-                uint32_t *remaining) {
-
-        unsigned char *link_ptr = NULL;
-        assert(remaining != NULL && "remaining may not be NULL when calling trace_get_first_link_from_router_lsa_v2!");
-
-        if (!lsa || *remaining < sizeof(libtrace_ospf_router_lsa_v2_t)) {
-                *remaining = 0;
-                return NULL;
-        }
-
-        link_ptr = ((unsigned char *)lsa) + sizeof(libtrace_ospf_router_lsa_v2_t);
-        *remaining -= sizeof(libtrace_ospf_router_lsa_v2_t);
-        return link_ptr;
-
-}
-
-DLLEXPORT unsigned char *trace_get_first_ospf_lsa_from_db_desc_v2(
-                libtrace_ospf_db_desc_v2_t *db_desc,
-                uint32_t *remaining) {
-
-        unsigned char *lsa_ptr = NULL;
-
-        assert(remaining != NULL && "remaining may not be NULL when calling trace_get_first_ospf_v2_lsa!");
-
-        if (!db_desc || *remaining < sizeof(libtrace_ospf_db_desc_v2_t)) {
-                *remaining = 0;
-                return NULL;
-        }
-        
-        lsa_ptr = ((unsigned char *)db_desc) + sizeof(libtrace_ospf_db_desc_v2_t);
-        *remaining -= sizeof(libtrace_ospf_db_desc_v2_t);
-
-        return lsa_ptr;
-}
-
-DLLEXPORT unsigned char *trace_get_first_ospf_lsa_from_update_v2(
-                libtrace_ospf_ls_update_t *ls_update,
-                uint32_t *remaining) {
-
-        unsigned char *lsa_ptr = NULL;
-
-        assert(remaining != NULL && "remaining may not be NULL when calling trace_get_first_ospf_v2_lsa!");
-
-        if (!ls_update || *remaining < sizeof(libtrace_ospf_ls_update_t)) {
-                *remaining = 0;
-                return NULL;
-        }
-        
-        lsa_ptr = ((unsigned char *)ls_update) + sizeof(libtrace_ospf_ls_update_t);
-        *remaining -= sizeof(libtrace_ospf_ls_update_t);
-
-        return lsa_ptr;
-}
-
-DLLEXPORT uint32_t trace_get_ospf_metric_from_as_external_lsa_v2(
-                libtrace_ospf_as_external_lsa_v2_t *as_lsa) {
-
-        uint32_t metric = 0;
-
-        assert(as_lsa);
-
-        metric = as_lsa->metric_a << 16;
-        metric |= (as_lsa->metric_b << 8);
-        metric |= as_lsa->metric_c;
-
-        return metric;
-}
-
-DLLEXPORT uint32_t trace_get_ospf_metric_from_summary_lsa_v2(
-                libtrace_ospf_summary_lsa_v2_t *sum_lsa) {
-
-        uint32_t metric = 0;
-
-        assert(sum_lsa);
-
-        metric = sum_lsa->metric_a << 16;
-        metric |= (sum_lsa->metric_b << 8);
-        metric |= sum_lsa->metric_c;
-
-        return metric;
-}
-
-DLLEXPORT int trace_get_next_ospf_link_v2(unsigned char **current,
-                libtrace_ospf_link_v2_t **link,
-                uint32_t *remaining,
-                uint32_t *link_len) {
-
-        if (*current == NULL || *remaining < sizeof(libtrace_ospf_link_v2_t)) {
-                *remaining = 0;
-                *link = NULL;
-                return 0;
-        }
-
-        *link = (libtrace_ospf_link_v2_t *)*current;
-
-        /* XXX The spec allows for multiple metrics for a single link. This
-         * approach won't support this, so we may need to be more intelligent
-         * about this in future */
-        *remaining -= sizeof(libtrace_ospf_link_v2_t);
-        *link_len = sizeof(libtrace_ospf_link_v2_t);
-        *current += sizeof(libtrace_ospf_link_v2_t);
-        
-        return 1; 
-
-}
-
-DLLEXPORT int trace_get_next_ospf_lsa_header_v2(unsigned char **current,
-                libtrace_ospf_lsa_v2_t **lsa_hdr,
-                uint32_t *remaining,
-                uint8_t *lsa_type,
-                uint16_t *lsa_length) {
-        
-        int valid_lsa = 0;
-
-        if (*current == NULL || *remaining < sizeof(libtrace_ospf_lsa_v2_t)) {
-                *lsa_hdr = NULL;
-                *remaining = 0;
-                return 0;
-
-        }
-
-        *lsa_hdr = (libtrace_ospf_lsa_v2_t *)(*current);
-        
-        /* Check that the LSA type is valid */
-        switch ((*lsa_hdr)->lsa_type) {
-                case TRACE_OSPF_LS_ROUTER:
-                case TRACE_OSPF_LS_NETWORK:
-                case TRACE_OSPF_LS_SUMMARY:
-                case TRACE_OSPF_LS_ASBR_SUMMARY:
-                case TRACE_OSPF_LS_EXTERNAL:
-                        valid_lsa = 1;
-                        break;
-        }
-        
-        /* This function is for reading LSA headers only, e.g. those in DB desc
-         * or LS Ack packets. As such, I'm going to set the type and length to
-         * values that should prevent anyone from trying to treat subsequent
-         * payload as an LSA body */
-        *lsa_type = 0;
-        *lsa_length = sizeof(libtrace_ospf_lsa_v2_t);
-
-        if (!valid_lsa) {
-                *remaining = 0;
-                return -1;
-        }
-        
-        *remaining -= *lsa_length;
-        *current += *lsa_length;
-
-        if (remaining == 0) {
-                /* No more LSAs */
-                return 0;
-        }
-
-        return 1;
-}
-
-DLLEXPORT int trace_get_next_ospf_lsa_v2(unsigned char **current,
-                libtrace_ospf_lsa_v2_t **lsa_hdr,
-                unsigned char **lsa_body,
-                uint32_t *remaining,
-                uint8_t *lsa_type,
-                uint16_t *lsa_length) {
-
-        int valid_lsa = 0;
-
-        if (*current == NULL || *remaining < sizeof(libtrace_ospf_lsa_v2_t)) {
-                *lsa_hdr = NULL;
-                *lsa_body = NULL;
-                *remaining = 0;
-
-                return 0;
-
-        }
-
-        *lsa_hdr = (libtrace_ospf_lsa_v2_t *)(*current);
-        *lsa_type = (*lsa_hdr)->lsa_type;
-        *lsa_length = ntohs((*lsa_hdr)->length);
-
-        /* Check that the LSA type is valid */
-        switch (*lsa_type) {
-                case TRACE_OSPF_LS_ROUTER:
-                case TRACE_OSPF_LS_NETWORK:
-                case TRACE_OSPF_LS_SUMMARY:
-                case TRACE_OSPF_LS_ASBR_SUMMARY:
-                case TRACE_OSPF_LS_EXTERNAL:
-                        valid_lsa = 1;
-                        break;
-        }
-                
-        if (*lsa_length > *remaining || !valid_lsa) {
-                /* LSA is incomplete or an invalid type.
-                 *
-                 * If this occurs, you've probably managed to read something
-                 * that is NOT a legit LSA */
-                *remaining = 0;
-                *lsa_body = NULL;
-                return -1;
-        }
-        
-        /* Some OSPF packets, e.g. LS ACKs, only contain LSA headers. If this
-         * is the case, we'll set the body pointer to NULL so the caller 
-         * can't read invalid data */
-        if (*lsa_length == sizeof(libtrace_ospf_lsa_v2_t))
-                *lsa_body = NULL;
-        else
-                *lsa_body = (*current + sizeof(libtrace_ospf_lsa_v2_t));
-
-        *remaining -= *lsa_length;
-        *current += *lsa_length;
-
-        if (remaining == 0) {
-                /* No more LSAs */
-                return 0;
-        }
-
-        return 1;
-
-}
-
 DLLEXPORT libtrace_tcp_t *trace_get_tcp(libtrace_packet_t *packet) {
         uint8_t proto;