sdhcp

simple dhcp client
git clone git://git.2f30.org/sdhcp.git
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commit 1c2db38abfb99b98dfcb3e13eab361e741c08d4e
parent ff21770ca48baa7851a9e6972e33584d66c3e785
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Fri Apr 25 22:02:00 +0200

add arg.h and -d, -i and -c options (untested)

Signed-off-by: Hiltjo Posthuma <hiltjo@codemadness.org>

Diffstat:
sdhcp.c | 27++++++++++++++++++++++-----
1 file changed, 22 insertions(+), 5 deletions(-)
diff --git a/sdhcp.c b/sdhcp.c @@ -14,6 +14,7 @@ #include <unistd.h> #include "util.h" +#include "arg.h" typedef struct bootp { unsigned char op [1]; @@ -83,7 +84,7 @@ static unsigned char xid[sizeof bp.xid]; static unsigned char hwaddr[16]; static time_t starttime; static char *ifname = "eth0"; -static char *cid = "vaio.12340"; +static char *cid = "vaio.12340"; /* TODO sane default value */ static int sock; /* sav */ static unsigned char server[4]; @@ -93,8 +94,9 @@ static unsigned char router[4]; static unsigned char dns[4]; static unsigned long t1; -#define IP(...) (unsigned char[4]){__VA_ARGS__} +static int dflag = 0; +#define IP(...) (unsigned char[4]){__VA_ARGS__} static void hnput(unsigned char *dst, unsigned long long src, size_t n) @@ -412,10 +414,25 @@ main(int argc, char *argv[]) struct sockaddr addr; int rnd; - if(argc > 2) + ARGBEGIN { + case 'c': /* client-id */ + strlcpy(cid, EARGF(usage()), sizeof(cid)); + break; + case 'i': /* interface */ + ifname = EARGF(usage()); + break; + case 'd': /* DNS: update /etc/resolv.conf */ + dflag = 1; + break; + default: + usage(); + break; + } ARGEND; + + if(argc == 2) usage(); - else if(argc == 2) - ifname = argv[1]; + else if(argc == 1) + ifname = argv[0]; signal(SIGALRM, nop); signal(SIGTERM, cleanexit);