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libnl
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msg: Pretty print error message header even if incomplete 

Signed-off-by: Thomas Graf <tgraf@suug.ch>
This commit is contained in:
Thomas Graf 2013-03-13 17:44:47 +01:00
parent c608b4d151
commit f72bfc7220
1 changed files with 24 additions and 15 deletions
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39
lib/msg.c
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@ -863,6 +863,27 @@ static void dump_attrs(FILE *ofd, struct nlattr *attrs, int attrlen,
}
}
static void dump_error_msg(struct nl_msg *msg, FILE *ofd)
{
struct nlmsghdr *hdr = nlmsg_hdr(msg);
struct nlmsgerr *err = nlmsg_data(hdr);
fprintf(ofd, " [ERRORMSG] %zu octets\n", sizeof(*err));
if (nlmsg_len(hdr) >= sizeof(*err)) {
char buf[256];
struct nl_msg *errmsg;
fprintf(ofd, " .error = %d \"%s\"\n", err->error,
strerror_r(-err->error, buf, sizeof(buf)));
fprintf(ofd, " [ORIGINAL MESSAGE] %zu octets\n", sizeof(*hdr));
errmsg = nlmsg_inherit(&err->msg);
print_hdr(ofd, errmsg);
nlmsg_free(errmsg);
}
}
/**
* Dump message in human readable format to file descriptor
* @arg msg Message to print
@ -879,21 +900,9 @@ void nl_msg_dump(struct nl_msg *msg, FILE *ofd)
fprintf(ofd, " [HEADER] %zu octets\n", sizeof(struct nlmsghdr));
print_hdr(ofd, msg);
if (hdr->nlmsg_type == NLMSG_ERROR &&
hdr->nlmsg_len >= nlmsg_msg_size(sizeof(struct nlmsgerr))) {
struct nl_msg *errmsg;
struct nlmsgerr *err = nlmsg_data(hdr);
char buf[256];
fprintf(ofd, " [ERRORMSG] %zu octets\n", sizeof(*err));
fprintf(ofd, " .error = %d \"%s\"\n", err->error,
strerror_r(-err->error, buf, sizeof(buf)));
fprintf(ofd, " [ORIGINAL MESSAGE] %zu octets\n", sizeof(*hdr));
errmsg = nlmsg_inherit(&err->msg);
print_hdr(ofd, errmsg);
nlmsg_free(errmsg);
} else if (nlmsg_len(hdr) > 0) {
if (hdr->nlmsg_type == NLMSG_ERROR)
dump_error_msg(msg, ofd);
else if (nlmsg_len(hdr) > 0) {
struct nl_cache_ops *ops;
int payloadlen = nlmsg_len(hdr);
int attrlen = 0;