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openflow-1.1+: OFPT_TABLE_MOD (part 1)

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Added infrastructure to support Openflow OFPT_TABLE_MOD message. This patch
does not include the flexible table miss handling code that is necessary to
support the semantics specified in OFPT_TABLE_MOD messages.

Current flow miss behavior continues to conform to Openflow 1.0.  Future
commits to add more flexible table miss support are needed to fully support
OPFT_TABLE_MOD for Openflow-1.1+.

Signed-off-by: Andy Zhou <azhou@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Andy Zhou
2013-09-07 03:02:32 -07:00
committed by Ben Pfaff
parent 451564513e
commit 918f2b8270
13 changed files with 287 additions and 3 deletions
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41
lib/ofp-parse.c
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@@ -1706,6 +1706,47 @@ parse_ofp_flow_mod_str(struct ofputil_flow_mod *fm, const char *string,
return error;
}
/* Convert 'table_id' and 'flow_miss_handling' (as described for the
* "mod-table" command in the ovs-ofctl man page) into 'tm' for sending the
* specified table_mod 'command' to a switch.
*
* Returns NULL if successful, otherwise a malloc()'d string describing the
* error. The caller is responsible for freeing the returned string. */
char * WARN_UNUSED_RESULT
parse_ofp_table_mod(struct ofputil_table_mod *tm, const char *table_id,
const char *flow_miss_handling,
enum ofputil_protocol *usable_protocols)
{
/* Table mod requires at least OF 1.1. */
*usable_protocols = OFPUTIL_P_OF11_UP;
if (!strcasecmp(table_id, "all")) {
tm->table_id = 255;
} else {
char *error = str_to_u8(table_id, "table_id", &tm->table_id);
if (error) {
return error;
}
}
if (strcmp(flow_miss_handling, "controller") == 0) {
tm->config = OFPTC11_TABLE_MISS_CONTROLLER;
} else if (strcmp(flow_miss_handling, "continue") == 0) {
tm->config = OFPTC11_TABLE_MISS_CONTINUE;
} else if (strcmp(flow_miss_handling, "drop") == 0) {
tm->config = OFPTC11_TABLE_MISS_DROP;
} else {
return xasprintf("invalid flow_miss_handling %s", flow_miss_handling);
}
if (tm->table_id == 0xfe && tm->config == OFPTC11_TABLE_MISS_CONTINUE) {
return xstrdup("last table's flow miss handling can not be continue");
}
return NULL;
}
/* Opens file 'file_name' and reads each line as a flow_mod of the specified
* type (one of OFPFC_*). Stores each flow_mod in '*fm', an array allocated
* on the caller's behalf, and the number of flow_mods in '*n_fms'.