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ofp-parse: Add support for registers.

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This updates the ovs-ofctl manpage even though ovs-ofctl doesn't really
support registers yet.
This commit is contained in:
Ben Pfaff
2010-11-23 13:33:48 -08:00
parent 4c5df7f774
commit 00b1c62fe8
2 changed files with 42 additions and 0 deletions
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25
lib/ofp-parse.c
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@@ -18,6 +18,7 @@
#include "ofp-parse.h"
#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
@@ -515,6 +516,24 @@ parse_field_value(struct cls_rule *rule, enum field_index index,
}
}
static void
parse_reg_value(struct cls_rule *rule, int reg_idx, const char *value)
{
uint32_t reg_value, reg_mask;
if (!strcmp(value, "ANY") || !strcmp(value, "*")) {
cls_rule_set_reg_masked(rule, reg_idx, 0, 0);
} else if (sscanf(value, "%"SCNi32"/%"SCNi32,
&reg_value, &reg_mask) == 2) {
cls_rule_set_reg_masked(rule, reg_idx, reg_value, reg_mask);
} else if (sscanf(value, "%"SCNi32, &reg_value)) {
cls_rule_set_reg(rule, reg_idx, reg_value);
} else {
ovs_fatal(0, "register fields must take the form <value> "
"or <value>/<mask>");
}
}
/* Convert 'string' (as described in the Flow Syntax section of the ovs-ofctl
* man page) into 'pf'. If 'actions' is specified, an action must be in
* 'string' and may be expanded or reallocated. */
@@ -595,6 +614,12 @@ parse_ofp_str(struct parsed_flow *pf, struct ofpbuf *actions, char *string)
} else {
parse_field_value(&pf->rule, f->index, value);
}
} else if (!strncmp(name, "reg", 3) && isdigit(name[3])) {
unsigned int reg_idx = atoi(name + 3);
if (reg_idx >= FLOW_N_REGS) {
ovs_fatal(0, "only %d registers supported", FLOW_N_REGS);
}
parse_reg_value(&pf->rule, reg_idx, value);
} else {
ovs_fatal(0, "unknown keyword %s", name);
}