FreeCalypso > hg > freecalypso-sw
view rvinterf/lowlevel/format_g23.c @ 221:842c9fd828fd
gsm-fw: TMFFS integrated
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Tue, 07 Jan 2014 03:51:09 +0000 |
parents | 2f214bd03119 |
children | 2f285f20d617 |
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/* * This module implements the decoding of G23 trace packets into * human-readable form. Because I have not yet reached the point * of integrating the target-side code that generates these packets, * I do not yet have the proper understanding of their format. * Therefore, the current decoding logic implemented here is based * on a heuristic examination of what the packets look like to an * uninitiated eye. */ #include <sys/types.h> #include <stdio.h> #include <string.h> #include <strings.h> #include "../pktmux.h" #include "../limits.h" extern u_char rxpkt[]; extern size_t rxpkt_len; static int is_well_formed() { int i, c; if (rxpkt_len < 17) return(0); for (i = 8; i < 16; i++) { c = rxpkt[i]; if (c < ' ' || c > '~') return(0); } return(1); } static void print_well_formed() { char buf[MAX_PKT_FROM_TARGET*4]; int i, c; char *dp; dp = buf; strcpy(dp, "G23:"); dp += 4; for (i = 1; i <= 7; i++) { sprintf(dp, " %02X", rxpkt[i]); dp += 3; } sprintf(dp, " \"%.4s\" \"%.4s\" ", rxpkt+8, rxpkt+12); dp += 15; i = 16; if (rxpkt[i] < 0x20) { sprintf(dp, "%02X ", rxpkt[i]); dp += 3; i++; } if (rxpkt_len - i == 5 && rxpkt[i] == '%' && !rxpkt[i+3] && !rxpkt[i+4]) { sprintf(dp, "%d", rxpkt[i+2] << 8 | rxpkt[i+1]); output_line(buf); return; } *dp++ = '\"'; for (; i < rxpkt_len; i++) { c = rxpkt[i]; if (c & 0x80) { *dp++ = 'M'; *dp++ = '-'; c &= 0x7F; } if (c < 0x20) { *dp++ = '^'; *dp++ = c + '@'; } else if (c == 0x7F) { *dp++ = '^'; *dp++ = '?'; } else *dp++ = c; } *dp++ = '\"'; *dp = '\0'; output_line(buf); } static void print_malformed() { char buf[MAX_PKT_FROM_TARGET*3+6]; int i; char *dp; dp = buf; strcpy(dp, "G23 UNK:"); dp += 8; for (i = 1; i < rxpkt_len; i++) { sprintf(dp, " %02X", rxpkt[i]); dp += 3; } *dp = '\0'; output_line(buf); } void print_g23_trace() { if (is_well_formed()) print_well_formed(); else print_malformed(); }