Date: Tue, 28 Aug 2001 18:27:31 -0700 From: "Anuranjan" <anu@nttmcl.com> To: "'Kory Hamzeh'" <kory@avatar.com> Cc: <questions@freeBSD.ORG> Subject: RE: very urgent : trying to add a route to kernel table Message-ID: <001a01c13029$c6a59fa0$f64545d8@ntt27f48otgmw8> In-Reply-To: <007901c13028$75eee4a0$14ce21c7@avatar.com>
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Hi Kory,
THanks a lot for pointing my mistake out !! It was quite foolish on my part
.. but fortunately it's not the problem in this case .... the call to calloc
is succeeding .. only the code simply gives EINVAL when i try adding any
route (i tried using ioctl with SIOCADDRT command and it ends up giving me
EOPNOTSUPP). As I mentioned , RTM_DELETE works bug ADD doesn't...
totally baffled :(
-----Original Message-----
From: Kory Hamzeh [mailto:kory@avatar.com]
Sent: Tuesday, August 28, 2001 6:18 PM
To: anu@nttmcl.com
Subject: RE: very urgent : trying to add a route to kernel table
Not quite sure why it is not working, but I think you should know that
calloc returns 0 on error, not a negative number.
> -----Original Message-----
> From: owner-freebsd-questions@FreeBSD.ORG
> [mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Anuranjan
> Sent: Tuesday, August 28, 2001 6:07 PM
> To: questions@FreeBSD.ORG
> Subject: very urgent : trying to add a route to kernel table
>
>
> Hi,
> I'm trying to add an entry into the kernel routing table (my first time).
> Don't know what I'm doing wrong ... but when I try "RTM_DELETE"
> it works ..
> only RTM_ADD doesn't (errno says EINVAL) ... any suggestions ? Am
> attaching
> the code snippet here..
>
> --Anu
>
> ------------------------------------------------------------------
> ----------
> ------------------------------------------------------------------
> ----------
> ------------------------------
>
> process_pkt_info(char *srcIPaddr, char *dstIPaddr, int src_if_id)
> {
> int err;
> struct sockaddr_in *s;
> int sockfd, rtsockfd;
> char *buf;
> pid_t pid;
> ssize_t n;
> struct rt_msghdr *rtm;
> struct sockaddr *sa, rti_info[RTAX_MAX];
>
>
> rtsockfd = socket(AF_ROUTE, SOCK_RAW, 0);
>
> buf = (char *)calloc(1, BUFLEN);
> if(buf < 0)
> {
> printf("calloc failed");
> abort();
> }
>
> rtm = (struct rt_msghdr *)buf;
> rtm->rtm_msglen = sizeof(struct rt_msghdr) + sizeof(struct
> sockaddr_in);
> rtm->rtm_version = RTM_VERSION;
> rtm->rtm_type = RTM_ADD;
> rtm->rtm_addrs = RTA_DST;
> rtm->rtm_pid = pid = getpid();
> rtm->rtm_seq = SEQ;
>
> s = (struct sockaddr_in *) (rtm + 1);
> s->sin_len = sizeof(struct sockaddr_in);
> s->sin_family = AF_INET;
> s->sin_addr.s_addr = inet_addr(srcIPaddr);
>
> fwd_enable(1);
>
> if(write(rtsockfd, rtm, rtm->rtm_msglen) < 0 )
> {
> printf ("error: %d\n", errno);
> }
>
> }
>
> int main (void)
> {
> process_pkt_info("4.5.6.7", NULL, 2);
> return(0);
> }
>
>
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